WO2021078100A1

WO2021078100A1 - Projection system and projection screen

Info

Publication number: WO2021078100A1
Application number: PCT/CN2020/121933
Authority: WO
Inventors: 张健; 杨长明; 李建军
Original assignee: 青岛海信激光显示股份有限公司
Priority date: 2019-10-23
Filing date: 2020-10-19
Publication date: 2021-04-29
Also published as: CN112782928A

Abstract

A projection system and a projection screen body (2), belonging to the technical field of projection. The projection system comprises a projection device (1) and the projection screen body (2), wherein the projection screen body (2) comprises a fixing frame (21), an optical screen (22), a sound production plate (23), one or more exciters (24), a cover plate (25), and a plurality of elastic connecting members (26), the optical screen (22) is attached to the first side of the sound production plate (23), the one or more exciters (24) are fixed to the second side of the sound production plate (23), the cover plate (25) is fastened to the one or more exciters (24), the edge of the sound production plate (23) can be wrapped around the edge of the fixing frame (21), and the sound production plate (23) is connected to the fixing frame (21) by means of the multiple elastic connecting members (26); and the projection device (1) is electrically connected with the one or more exciters (24) and used for emitting projection light to the optical screen (22), and the one or more exciters (24) can excite the sound production plate (23) to vibrate so as to produce sound.

Description

Projection system and projection screen

This application claims priority to be filed with the Chinese Patent Office on October 23, 2019, with application number 201911011454.8 and invention title "Projection System and Projection Screen", the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of projection technology, in particular to a projection system and a projection screen.

Background technique

With the continuous development of science and technology, more and more projection systems are used in people's work and life. At present, the projection system mainly includes projection equipment and projection screens. Among them, the projection device is mainly used to emit projection light, and the projection screen is fixed on the support, and is used to reflect the emitted projection light to realize the projection of the screen.

In the related art, taking the projection system as a laser TV as an example, the laser TV can include a projection host and an optical screen. The projection host can emit projection light and play audio data at the same time. The optical screen can receive the projection light from the projection host and reflect it. Form a picture.

However, when displaying images and playing audio data in the above-mentioned manner, the projection host and the optical screen must not be in the same position, which can easily cause the image and sound to be inconsistent, thereby reducing the projection effect of the projection system.

Summary of the invention

This application provides a projection system and a projection screen, and the technical solutions adopted are as follows:

In one aspect, a projection system includes: a projection device and a projection screen. The projection screen includes a fixed frame, an optical screen, a sound board, one or more exciters, a cover, and a plurality of elastic connectors;

The optical screen is attached to the first side of the sound board, one or more exciters are fixed on the second side of the sound board, the cover is buckled on the one or more exciters, and the edge of the sound board can wrap the edge of the fixed frame, And the sound board is connected with the fixed frame through a plurality of elastic connecting pieces;

The projection device is electrically connected with one or more exciters, and is used for emitting projection light to the optical screen, and the one or more exciters can excite the sound board to vibrate to emit sound.

In another aspect, a projection screen is provided. The projection screen includes: a fixed frame, an optical screen, a sound board, one or more exciters, a cover plate, and a plurality of elastic connectors;

The optical screen is used to receive the projection light emitted by the projection device and perform screen display, one or more exciters are used to electrically connect with the projection device, and one or more exciters can excite the sound board to vibrate to emit sound.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

FIG. 1 is a schematic side view of the structure of a projection system provided by an embodiment of the present application;

2 is a schematic diagram of a rear view structure of a projection screen provided by an embodiment of the present application;

3 is a schematic diagram of a side view structure of a projection screen provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a partial structure of a first skin provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a partial structure of another first skin provided by an embodiment of the present application;

6 is a schematic diagram of a partial structure of a projection screen provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a rear view structure of another projection screen provided by an embodiment of the present application.

Reference signs:

1: Projection equipment; 2: Projection screen

21: fixed frame; 22: optical screen; 23: sound board; 24: exciter; 25: cover plate; 26: elastic connector; 27: eyelet button;

211: inner frame; 212: outer frame; 231: first skin; 232: second skin; 233: honeycomb core board; 234: soft connector.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below with reference to the accompanying drawings.

FIG. 1 illustrates a schematic side view structure diagram of a projection system according to an embodiment of the present application, FIG. 2 illustrates a rear view structure schematic view of a projection screen according to an embodiment of the present application, and FIG. 3 illustrates a projection system according to an embodiment of the present application. Schematic diagram of the side structure of the screen. As shown in Figure 1, Figure 2 and Figure 3, the projection system includes: a projection device 1 and a projection screen 2. The projection screen 2 includes a fixed frame 21, an optical screen 22, a sound board 23, one or more exciters 24, and a cover plate. 25 (not shown in the figure) and a plurality of elastic connectors 26; the optical screen 22 is attached to the first side of the sounding plate 23, one or more exciters 24 are fixed on the second side of the sounding plate 23, and the cover plate 25 Fastened to the one or more exciters 24, the edge of the sounding plate 23 can wrap the edge of the fixed frame 21, and the sounding plate 23 is connected to the fixed frame 21 through a plurality of elastic connectors 26; the projection device 1 is connected to one One or more exciters 24 are electrically connected and used to emit projected light to the optical screen 22, and one or more exciters 24 can excite the sound board 23 to vibrate to emit sound.

In the embodiment of the present application, the optical screen 22 is attached to the first side of the sound board 23, so that when the projection device 1 emits the projection light to the optical screen 22, the optical screen 22 can reflect the projection light, so that the optical The screen 22 realizes the projection of the picture. In addition, since one or more exciters 24 electrically connected to the projection device 1 are fixed on the sound board 23, the projection device 1 can drive the exciter 24 to vibrate, so that the sound board 23 is driven to vibrate together through the exciter 24 to pass The sounding board 23 emits a sound. Since the sounding board 23 is fixed on the fixed frame 21, the optical screen 22 is attached to the sounding board 23, so that the sounding board 23 and the optical screen 22 can be ensured to be in the same area, which can achieve the effect of sound from the picture, avoiding the picture and sound The non-uniformity improves the projection effect of the projection system.

Wherein, the optical screen 22 may include an optical film, of course, may also include other structures, as long as the screen can be displayed, which is not limited in the embodiment of the present application.

Wherein, the fixed frame 21 can be a frame structure, and the fixed frame 21 can be a rectangular, circular or other shape structure with a hollow area. Of course, the fixed frame 21 can also be other non-hollow frame structures, as long as the connection with the sounding board 23 can be realized. In addition, the fixed frame 21 can be used to connect with a supporting body to realize fixed support for the entire projection screen 2. The supporting body can be a fixed bracket or a wall, as long as the projection screen 2 can be fixedly supported.

It should be noted that the fixed frame 21 may also include an inner frame 211 and an outer frame 212, so that the sound board 23 can be connected to the inner frame 211 through the elastic connecting member 26, and then the outer frame 212 can be wrapped on the inner frame 211, In this way, the edge of the sound board 23 can be blocked by the outer frame 212, so that the projection screen 2 is more beautiful.

In some embodiments, the edge of the sound board 23 is connected to the fixed frame 21, so that the central area of the sound board 23 is located in the central area of the fixed frame 21, so that the optical screen 22 can be attached to the central area of the sound board 23. At the same time, it is ensured that the sound emitted by the sound board 23 can be located at the exact center position.

In some embodiments, the sounding board 23 may be a whole board, and the area of the sounding board 23 is less than or equal to the area of the optical screen 22; or the sounding board 23 may include multiple sub-sounding boards 23, and multiple sub-sounding boards 23 It is integrally connected and can independently emit sound under the action of one or more exciters 24. The total area of the multiple sub-sounding boards 23 is less than or equal to the area of the optical screen 22.

Wherein, when the sound board 23 is a plurality of sub sound boards, the plurality of sub sound boards can be integrally connected to obtain the sound board 23, and then the optical screen 22 is attached to the sound board 23.

In some embodiments, the sounding board 23 may include a first skin 231, a second skin 232, and a honeycomb core board 233. The honeycomb core board 233 is glued between the first skin 231 and the second skin 232; optical The screen 22 is attached to the side of the first skin 231 away from the honeycomb core board 233, and one or more exciters 24 are fixed on the side of the second skin 232 away from the honeycomb core board 233; the first skin 231 and /Or the edge of the second skin 232 wraps the edge of the fixed frame 21, and the first skin 231 and/or the second skin 232 are connected to the fixed frame 21 through a plurality of elastic connecting members 26.

Wherein, the side of the first skin 231 that is in contact with the honeycomb core board 233 and the side of the second skin 232 that is in contact with the honeycomb core board 233 may be provided with a layer of PU (polyurethane, polyurethane) glue. The first skin 231 and the second skin 232 can be adhered tightly to the honeycomb core board 233, and the first skin 231 and the second skin 232 can be softened to facilitate the first skin 231 and the second skin 232 Can withstand the effect of pulling force. After the first skin 231 is bonded to the honeycomb core board 233, the first skin 231 and the optical screen 22 can be bonded to achieve an indirect connection between the honeycomb core board 233 and the optical screen 22.

Wherein, the edge of the first skin 231 and/or the second skin 232 can protrude from the edge of the honeycomb core board 233, and the edge of the first skin 231 and/or the second skin 232 can protrude from the edge of the honeycomb core board 233 The edge of the fixed frame 21 is partially wrapped, and is connected to the fixed frame 21 through a plurality of elastic connecting members 26.

When the first skin 231 is connected to the fixed frame 21 through the elastic connecting member 26, a circle can be cut around the edge of the second skin 232, and then the honeycomb core board 233 corresponding to this circle of skin can be removed to ensure The edge of the first skin 231 protrudes from the edge of the honeycomb core board 233, and the part of the first skin 231 protruding from the edge of the honeycomb core board 233 can be connected to the fixed frame 21 through the elastic connecting member 26.

Further, when the part of the first skin 231 protruding from the edge of the honeycomb core board 233 is connected to the fixed frame 21, the part of the first skin 231 protruding from the honeycomb core board 233 is located on the second side of the fixed frame 21 One side, and protrudes from the edge of the fixed frame 21, and then the protruding part of the first skin 231 is folded toward the second side of the fixed frame 21, so that the edge of the first skin 231 is wrapped on the fixed frame 21 Then, the edge of the first skin 231 is connected to the fixed frame 21 through the elastic connecting member 26.

It should be noted that when folding the distribution of the honeycomb core board 233 on the first skin 231, in order to make the first skin 231 easy to be folded at the four corners, in some embodiments, such as As shown in FIGS. 4 and 5, the four corners of the first skin 231 can be cut off.

It should also be noted that when the second skin 232 is connected to the fixed frame 21 through the elastic connecting member 26, as shown in FIG. 3, the connection between the second skin 232 and the fixed frame 21 can be achieved in a similar manner to the above. The embodiments of this application will not be repeated here.

Wherein, when the first skin 231 and the second skin 232 are connected to the fixed frame 21 through the elastic connecting member 26, a circle can be cut around the edge of the honeycomb core plate 233, and then the second skin can be realized in a similar manner to the above. The first skin 231 and the second skin 232 are connected to the fixed frame 21 at the same time, which will not be repeated here in the embodiment of the present application.

In other embodiments, as shown in FIG. 6, the sounding board 23 includes a first skin 231, a second skin 232, a honeycomb core board 233, and a flexible connecting member 234. The honeycomb core board 233 is adhered to the first skin. Between the skin 231 and the second skin 232, the optical screen 22 is attached to the side of the first skin 231 away from the honeycomb core board 233, and one or more exciters 24 are fixed on the second skin 232 away from the honeycomb core One side of the board 233; the soft connecting piece 234 has a loop-shaped structure, the soft connecting piece 234 surrounds the edge of the second skin 232, and the inner edge of the soft connecting piece 234 is fixedly connected to the second skin 232, the soft The outer edge of the connecting piece 234 wraps the fixed frame 21 and is connected to the fixed frame 21 through a plurality of elastic connecting pieces 26.

Wherein, the soft connecting member 234 may be a soft cloth. For example, the soft connecting member 234 may be a synthetic cloth to ensure that the soft cloth has good ductility, so that it can be in a taut state under the action of an external force and will not be deformed.

When the soft connecting member 234 is a soft cloth, the connection between the first skin 231 and the fixed frame 21 as described above can be adopted to realize the connection between the soft connecting member 234 and the fixed frame 21. It should be noted that when the flexible connecting member 234 is connected to the second skin 232, the connection can be achieved by double-sided tape or other means, which is not limited in the embodiment of the present application.

It should be noted that the soft connector 234 can also be fixedly connected to the first skin 231, and the connection method can be as described above for the connection of the soft connector 234 and the second skin 232, and then through the soft connection The piece 234 is connected to the fixed frame 21. When connecting with the fixed frame 21 through the soft connecting piece 234, the edges of the first skin 231, the second skin 232 and the honeycomb core board 233 may not be cut, as long as the sound board 23 and the soft connecting piece 234 can be connected Just connect.

For the above two embodiments, the structures and styles of the first skin 231, the second skin 232 and the honeycomb core board 233 are the same or similar. Therefore, the first skin 231, the second skin 232, and the honeycomb core panel 233 of any one of the above two embodiments will be introduced next.

Wherein, the first skin 231 and the second skin 232 can be fiber skins. Since the extending direction of the fibers can be a single direction or an interweaving direction, and the tensile strength of the fibers is high, the first skin 231 and/or When the second skin 232 is connected to the fixed frame 21 by the elastic connecting member 26, it can be tightened by the elastic connecting member 26 and is not easily damaged.

It should be noted that the material of the first skin 231 and the second skin 232 can be glass fiber, carbon fiber or glass-carbon hybrid fiber. Of course, the first skin 231 and the second skin 232 can also be plastic or light. Quality aluminum and so on. The thickness of the first skin 231 and the second skin 232 may both be in the thickness range of 0.1 to 0.5 mm, and further, the thickness of the first skin 231 and the second skin 232 may both be in the thickness of 0.18 to 0.36 mm Within the range, the thickness of the first skin 231 and the thickness of the second skin 232 may be different, as long as they are within the above-mentioned thickness range.

Wherein, the honeycomb core board 233 is a honeycomb core board with a plurality of hollow hexagonal honeycomb cells closely arranged in cross section. Each hexagonal honeycomb cell in the honeycomb core board 233 includes at least a pair of parallel honeycomb walls, And there is a pair of parallel honeycomb walls perpendicular to the horizontal plane. For example, the material of the honeycomb core board 233 may be paper, aramid, metal or other composite materials.

It should be noted that the distance between a pair of parallel honeycomb walls is in the range of 3-10mm, and the distance between a pair of parallel honeycomb walls is equal to the distance between two opposing vertices on the cross section of the honeycomb cell. The ratio is less than 0.58.

It should also be noted that the sounding board 23 may also include only the honeycomb core board 233, or only the honeycomb core board 233 and the first skin 231, or only the honeycomb core board 233 and the second skin 232, as long as the optical The screen 22 and the exciter 24 are fixed on the sound board 23, and the honeycomb core board 233 is fixedly connected to the fixed frame 21, which is not limited in the embodiment of the present application.

In some embodiments, the optical screen 22 can be attached to the sounding board 23 by double-sided tape, that is, the optical screen 22 can be attached to the first skin 231 on the side away from the honeycomb core board 233 by double-sided tape. . Of course, the optical screen 22 can also be attached to the sound board 23 in other ways, which is not limited in the embodiment of the present application.

It should be noted that since the optical screen 22 is made of translucent material, it is easy to observe the structure of the sounding plate 23 through the optical screen 22, and if the surface of the sounding plate 23 is not flat enough, it is easy to observe the pits of the sounding plate 23. In addition, the unevenness of the surface of the sounding board 23 will also make the optical screen 22 not flat enough. Therefore, in some embodiments, the thickness of the first skin 231 may be greater than the thickness of the second skin 232 to Through the extrusion of the honeycomb core board 233 by the first skin 231, the unevenness of the honeycomb core board 233 is displayed on the side where the second skin 232 is located, so as to improve the flatness of the first skin 231, thereby increasing The flatness of the optical screen 22.

In some embodiments, as shown in FIG. 7, the edge of the sounding plate 23 may be provided with a plurality of through holes corresponding to the plurality of elastic connecting members 26 one-to-one, and the first end of each elastic connecting member 26 is connected to the corresponding connecting member 26. The second end of each elastic connecting member 26 is connected with the fixed frame 21. For example, the plurality of elastic connecting members 26 may be a plurality of tension springs.

It should be noted that, for the size of each through hole, it is only necessary to ensure that the first end of the elastic connecting member 26 can extend into the corresponding through hole. The elastic connecting member 26 can not only play the role of tensioning the sounding plate 23, but also can play a certain vibration damping and buffering effect when the sounding plate 23 vibrates based on the elastic deformation of the plurality of elastic connecting members 26, so as to avoid sound generation. The vibration of the plate 23 drives the fixed frame 21 to vibrate, so that the noise generated by the fixed frame 21 due to vibration can be reduced.

In some embodiments, multiple through holes can be arranged on the edge of the first skin 231 and/or the second skin 232, or on the outer edge of the soft cloth. Of course, multiple through holes can also be arranged on the edge of the first skin 231 and/or the second skin 232 only. The skin 231 and/or the second skin 232 are arranged on two opposite sides, or arranged on two opposite sides of the soft cloth.

For example, six through holes can be arranged on two opposite sides of the first skin 231 and/or second skin 232, or six through holes can be arranged on two opposite sides of the soft cloth. Through hole. Wherein, two through holes may be arranged at the middle position of a corresponding side, and the remaining four through holes may be symmetrically arranged at both ends of a corresponding side.

In some embodiments, there are at least two first sub-elastic connectors and/or at least two second sub-elastic connectors in the plurality of elastic connectors 26; each of the at least two first sub-elastic connectors is The included angle between the line on which the sub-elastic connector is located and one side of the sounding plate 23 is within the reference included angle range, and the line on which each second sub-elastic connector of the at least two second sub-elastic connectors is located is vertical or Parallel to one side of the sounding board 23.

Wherein, the reference included angle range may refer to an included angle range greater than 0 degrees and less than 90 degrees. In this way, the first elastic sub-connecting member is arranged obliquely with respect to the side of the sounding plate 23, so that the tensile force of the first elastic sub-connecting member can generate a component in the horizontal and vertical directions, so that the entire sounding plate 23 can be in the vertical direction. The force is applied in both the straight and horizontal directions. In this way, the upper and lower sides of the sounding plate 23 can be connected to the fixed frame 21 only through at least two second sub-elastic connecting members, or the left and right sides of the sounding plate 23 can be connected to the fixed frame 21. The fixed frame 21 is connected, so that the number of second sub-elastic connecting members can be reduced.

Wherein, there is an optimal value for the angle between the straight line where the first sub-elastic connector is located and a vertical side of the sounding plate 23, and this optimal value can be obtained by the following formula:

In the above formula, θ is the angle between the straight line on which the first sub-elastic connector is located and a vertical side of the sounding plate 23, X is the total length of the elastic connector 26 when placed vertically, and Y is the diagonally placed When the total length of the elastic connecting member 26, L is the original length of the spring.

It should be noted that this angle can have a deviation of ±5°, and a plurality of elastic connectors 26 can be symmetrically distributed on two opposite sides of the sounding plate 23, so as to ensure that the sounding plate 23 is in two opposite directions. The force is balanced to prevent the elastic connecting member 26 from pulling the sounding plate 23 skewed, or causing a certain area of the sounding plate 23 to be unbalanced in force, thereby causing damage.

Further, when the sounding board 23 and the fixed frame 21 are connected by the elastic connecting member 26, the projection screen 2 may also include a plurality of eyelet buttons 27, and the plurality of eyelet buttons 27 correspond to the multiple through holes on the sounding board 23 one-to-one. Each eyelet button 27 wraps the edge of the corresponding through hole, and the first end of each elastic connecting member 26 is connected to the corresponding eyelet button 27.

In this way, the first end of the elastic connecting member 26 can pass through the corresponding eyelet button 27 to realize the connection with the sounding board 23, so as to ensure that the force between the elastic connecting member 26 and the sounding board 23 can be evenly distributed on the eyelet button 27. Furthermore, it is avoided that the sounding plate 23 is damaged due to a large local force.

In the embodiment of the present application, one or more exciters 24 can be elastically connected to the sound board 23. At this time, the projection screen 2 may also include one or more foam glue corresponding to one or more exciters 24, and the one or more exciters 24 are respectively adhered to the sound board 23 through the corresponding foam glue. .

When the exciter 24 is working, it needs to reciprocate in the normal direction of the sounding board 23. At the same time, the exciter 24 can transmit sound waves to the sounding board 23 when it is close to the sounding board 23, and the entire surface of the sounding board 23 vibrates together. . Since the foam glue has certain elasticity, it can ensure that the exciter 24 is bonded while enabling the exciter 24 to reciprocate in the normal direction of the sounding plate 23.

In some embodiments, the projection screen 2 may further include one or more elastic bodies corresponding to one or more exciters 24 in a one-to-one manner. Each elastic body is fixed on the corresponding exciter 24, and the cover plate 25 is buckled on one or more elastic bodies, and is fixedly connected with the sounding plate 23 and/or the fixing frame 21.

It should be noted that since the cover plate 25 is buckled on one or more elastic bodies, the amplitude of each exciter 24 in the direction away from the sounding plate 23 can be reduced by the cover plate 25, thereby reducing the exciter 24 Energy loss during vibration. In addition, each elastic body can prevent hard contact between the corresponding exciter 24 and the cover plate 25, thereby avoiding the generation of noise.

In some embodiments, there may be at least one annular foam in one or more elastomers, and each annular foam is sleeved on the corresponding exciter 24 and glued to the corresponding exciter 24.

It should be noted that because the ring-shaped foam can be elastically deformed between the exciter 24 and the cover 25 due to squeezing, the ring-shaped foam glued on the exciter 24 can prevent the exciter 24 and the cover 25 from being compressed. The hard contact between them avoids unnecessary friction and noise. When the exciter 24 vibrates, because the ring foam has a certain thickness, when the exciter 24 is in indirect contact with the cover 25, the amplitude of the exciter 24 can also be limited by the ring foam, thereby reducing the exciter 24 The loss of energy in the direction away from the sounding plate 23.

For example, the ring-shaped foam can be adhered to the exciter 24 by double-sided tape, or can be glued to the exciter 24 in other ways, which is not limited in the embodiment of the present invention.

In some embodiments, at least one spring may also be present in one or more elastic bodies, the first end of each spring may be glued to the corresponding exciter 24, and the second end of each spring may be glued to the cover 25 on. Since the spring can be elastically deformed due to compression between the exciter 24 and the cover plate 25, each of the at least one spring can form an elastic buffer between the corresponding exciter 24 and the cover plate 25. At the same time, when the exciter 24 is in indirect contact with the cover plate 25 through the spring, the spring can also limit the amplitude of the exciter 24, thereby reducing the energy loss of the exciter 24 in the direction away from the sounding plate 23.

Since the two ends of each spring are respectively connected to the corresponding exciter 24 and the cover plate 25, hard contact between each spring and the exciter 24 and/or the cover plate 25 can be avoided, and unnecessary friction and noise.

In some embodiments, the cover plate 25 may be provided with one or more vent holes corresponding to one or more exciters 24, so that when the exciter 24 vibrates, the gas on both sides of the cover plate 25 can pass through The ventilation holes are exchanged with each other, that is, when the exciter 24 vibrates, the ventilation holes can balance the air pressure difference between the two sides of the cover plate 25, so that the air circulation on both sides of the cover plate 25 is smoother.

In some embodiments, the cover plate 25 may have a strip structure, the two ends of the cover plate 25 are fixedly connected to the fixing frame 21, and the cover plate 25 may be provided with one or more recesses corresponding to one or more exciters 24. The groove, the side of each exciter 24 away from the sounding plate 23 is located in the corresponding groove.

It should be noted that in order to prevent hard contact between the exciter 24 and the cover 25, there is a gap between the side and bottom surface of the groove and the exciter 24, and the shape of the groove can be the same or similar to that of the exciter 24 . When the exciter 24 falls off the sounding plate 23, the groove corresponding to each exciter 24 can limit the exciter 24 in the vertical direction, and can temporarily carry the exciter 24 that has fallen off.

It should be noted that one or more ribs may be provided on the cover plate 25 along the length direction. When the number of one or more ribs is multiple, the multiple ribs may be uniformly arranged along the width direction of the cover plate 25. The ribs can increase the strength of the cover plate 25, can ensure that the cover plate 25 can apply more stress to the exciter 24, and at the same time enhance the stability of the cover plate 25.

In some embodiments, the cover plate 25 can have a linear strip structure. Of course, the cover plate 25 can also have a bent strip structure, as long as it can hold the actuator 24. For example, when a plurality of exciters 24 are arranged in a straight line on the sounding plate 23, the cover plate 25 may be a linear strip-shaped cover plate 25, and when the plurality of exciters 24 are arranged non-linearly on the sounding plate 23, the cover plate 25 The cover plate 25 can be bent according to the distribution form of the exciters 24.

Wherein, both ends of the cover plate 25 can be fixedly connected to the fixed frame 21 by screws, of course, can also be fixedly connected to the fixed frame 21 in other ways, which is not limited in the embodiment of the present invention.

In some embodiments, the projection screen 2 may also include one or more supporting mechanisms, and each supporting mechanism may include a hanger and a first elastic pad; the support arm of the hanger extends into the hanging slot of the fixed frame 21, and the first The elastic pad is buckled on the support arm of the hanger, and can fill the gap between the support arm of the hanger and the side wall of the hanging groove, and the fixed arm of the hanger is used for connecting with the support body.

Wherein, a connecting section may be provided between the support arm and the fixed arm of the hanger to realize the connection between the support arm and the fixed arm. The support arm, the connecting end and the fixed arm may be connected to form a U-shaped structure, or the end of the support arm away from the connecting section faces the opposite structure to the end of the fixed arm away from the connecting section. The support arm, the connecting end and the fixed arm can be formed in one piece to increase the overall strength of the hanger.

Illustratively, the support arm is vertically connected to the first end of the connecting section, and the fixed arm is vertically connected to the second end of the connecting section. At this time, the connecting section can be used as a supporting platform.

Wherein, the material of the first elastic pad can be silica gel or other materials, as long as it has shock-absorbing and bearing capacity.

In some embodiments, the first elastic pad may have a U-shaped structure, and the vertical distance between the first side wall and the second side wall of the first elastic pad is equal to the thickness of the support arm of the hanger. In this way, the support arm of the hanger can be clipped into the gap between the first side wall and the second side wall of the first elastic pad, and when the support arm extends into the hanging groove of the fixed frame 21, it can pass through the first elastic pad. The first side wall and the second side wall fill the gap between the support arm and the hanging slot of the hanger, so as to avoid hard contact between the support arm and the hanging slot, so as to achieve vibration reduction between the hanger and the hanging slot.

Wherein, the sum of the thickness of the first side wall of the first elastic pad, the thickness of the second side wall and the thickness of the support arm may be equal to the vertical distance between the two opposite inner walls of the hanging groove, so as to prevent the first elastic pad from being fixed The possible shaking between the frames 21.

In other embodiments, the first elastic pad has an S-shaped structure, and the first elastic pad can also be buckled on the side wall of the hanging groove.

Among them, the first elastic pad of the S-shaped structure refers to a structure in which there are two U-shaped grooves, and the openings of the two U-shaped grooves are facing oppositely. When the support arm of the hanger extends into the hanging groove to support the fixed frame 21, the gap between the support arm and the side wall of the hanging groove can be filled by the two side walls of the first U-shaped groove on the first elastic pad to achieve The primary vibration reduction between the hanger and the hanging trough fills the gap between the support platform and the side wall of the hanging trough through the bottom of the second U-shaped groove, thereby realizing the secondary vibration damping between the hanger and the hanging trough.

Wherein, the first elastic pad includes a first side wall, a first connecting portion, a connecting wall, a second connecting portion and a second side wall. The first side wall, the connecting wall and the second side wall may be parallel to each other, and the first side The wall and the connecting wall can be connected through the first connecting portion to form a first U-shaped groove, and the second side wall and the connecting wall can be connected through the second connecting portion to form a second U-shaped groove.

Wherein, the sum of the thickness of the first side wall of the first elastic pad, the thickness of the connecting wall and the thickness of the support arm may be equal to the vertical distance between the two opposite inner walls of the hanging groove, so as to avoid the first elastic pad and the fixed frame 21 The shaking that may occur between.

It should be noted that, in order to realize that the first U-shaped groove of the first elastic pad can be buckled on the support arm, the second U-shaped groove can be buckled on the side wall of the hanging groove, and the first side wall of the first elastic pad and the connecting wall The vertical distance therebetween may be equal to the thickness of the support arm of the hanger, and the vertical distance between the second side wall of the first elastic pad and the connecting wall may be greater than or equal to the thickness of the side wall of the hanging groove.

Wherein, when the vertical distance between the second side wall of the first elastic pad and the connecting wall is equal to the thickness of the side wall of the hanging groove, the second U-shaped groove of the first elastic pad can be more tightly buckled on the side of the hanging groove On the wall to further tighten the connection between the hanger and the fixed frame 21. When the vertical distance between the second side wall of the first elastic pad and the connecting wall is greater than the thickness of the side wall of the hanging groove, it is convenient to hang the fixing frame 21, and the hanging groove can be smoothly locked into the second elastic pad. The gap between the side wall and the connecting wall.

Of course, in order to realize that the first U-shaped groove of the first elastic pad can be buckled on the support arm, the second U-shaped groove can be buckled on the side wall of the hanging groove. The vertical distance may also be slightly smaller than the thickness of the support arm of the hanger, and the vertical distance between the second side wall of the first elastic pad and the connecting wall may also be slightly smaller than the thickness of the side wall of the hanging groove, so that the first elastic pad and the hanging The fit between the racks and between the first elastic pad and the hanging groove can be interference fit, which can ensure the tightness between the hanging rack, the first elastic pad and the fixed frame 21.

In some embodiments, the second connecting portion between the second side wall of the first elastic pad and the connecting wall can be fixed on the support platform of the hanger by double-sided tape, which can prevent the first elastic pad from moving. Bit and fall off. The first side wall and the connecting wall of the first elastic pad can also be fixed on the support arm of the hanger by double-sided tape, so as to achieve a tighter fixation of the first elastic pad.

In some embodiments, the hardness of the first elastic pad may be in the hardness threshold range. The hardness threshold range may be a hardness range that ensures that the first elastic pad is not easily deformed and has a certain vibration absorbing ability. If the hardness of the first elastic pad is too low, it will be easily deformed under the action of external force, and it will not be able to tightly buckle the hanger and the fixed frame 21, which will easily cause the fixed frame 21 to shake and tilt, which will cause the fixed frame 21 to fall easily. If the hardness of the first elastic pad is too high, the vibration absorbing ability of the first elastic pad will be weakened. For example, the hardness of the first elastic pad can be controlled within a range of 30 to 40 degrees Shore hardness.

In some embodiments, the opening edge of the first U-shaped groove and the opening edge of the second U-shaped groove of the first elastic pad can be chamfered, so that the first U-shaped groove can be smoothly buckled on the support arm during installation. On the upper side, the second U-shaped groove can be smoothly buckled on the side wall of the hanging groove. Of course, the two ends connected to the first side wall and the connecting wall on the first connecting portion of the first elastic pad can also be chamfered, so that the first side wall and the connecting wall of the first elastic pad can more smoothly extend in Hanging slot.

In some embodiments, each supporting mechanism may further include a second elastic pad and a fixing member; the fixing arm of the hanger is provided with a through hole, the side wall of the second elastic pad is provided with a ring of grooves, and the fixing arm of the hanger is provided with a through hole. It can be inserted into the groove based on the through hole, and the fixing member passes through the through hole and the second elastic pad, and is connected with the support body.

Wherein, the material of the second elastic pad can be silica gel or other materials, as long as it has shock-absorbing and bearing capacity. In this way, because the second elastic pad can avoid the rigid contact between the fixed arm of the hanger and the fixing member, and between the fixed arm of the hanger and the support body, and the second elastic pad has the function of buffering and absorbing vibration, which can avoid The noise is generated between the fixed part and the fixed arm, and between the support body and the fixed arm, so as to realize the vibration reduction between the hanger and the support body.

Wherein, the end surface of the second elastic pad may be round, square or other shapes. In order to enable the second elastic pad to be tightly inlaid on the fixed arm of the hanger based on the through hole on the hanger, the shape and size of the cross section of the groove of the second elastic pad can be the same as the shape of the through hole on the hanger. The size is the same, and the through holes can be round, square or other shapes.

Wherein, the fixing member may include fixing screws or other fixing bodies, as long as the second elastic pad and the hanger can be nailed to the support body.

In some embodiments, each supporting mechanism may further include a gasket, which is sleeved on the fixing member and can be compressed on the end surface of the second elastic gasket.

Wherein, when the fixing part is a screw, the washer can be sleeved on the screw rod of the fixing screw, and contact with the screw head, and be pressed against the end surface of the second elastic pad by the screw head.

In actual use, the material of the second elastic pad is relatively soft. When the hanger is subjected to an external force perpendicular to the end surface of the second elastic pad, it will apply a certain force to the second elastic pad, which is easy to cause the second elastic pad to produce It is elastically deformed, so that the hanger is easily detached from the second elastic pad based on the through hole. Therefore, the size of the gasket can be larger than the size of the through hole, so as to prevent the hanger from coming out, and at the same time, the external force can be distributed to the gasket with a larger area, so that the second elastic gasket is not easily deformed. In addition, the shape of the gasket may also be round, square or other shapes.

Among them, the gasket can be made by a pressure casting process, with a relatively smooth surface and high precision. Of course, the gasket can also be made by other manufacturing processes, which is not limited in the embodiment of the present invention.

In the embodiment of the present invention, the first elastic pad can realize the primary and secondary vibration reduction of the projection screen 2, and the second elastic pad can realize the three-stage vibration reduction of the projection screen 2. The combined use of the first elastic pad and the second elastic pad can make the vibration reduction effect of the projection screen 2 more significant.

In summary, the projection screen 2 provided with the sound board 23 has the dual physical functions of picture display and sound playback. The projection system no longer needs to use traditional speakers. This combination of sound board 23 and optical screen 22 can be used. Achieve the effect of EVS (Excited Voicing Screen). The multiple exciters 24 fixed on the sounding board 23 can excite the sounding board 23 at different positions, so that the sounding board 23 can emit stereo bending sound waves.

It should be noted that the way in which the exciter 24 drives the sound board 23 to emit sound has excellent performance in many aspects. In terms of timbre, the amplitude of the sounding board 23 is a micron-level small amplitude, small distortion and excellent transient response, high sound reproduction, and suitable strength, high clarity and good spatial depth, so The sound board 23 can transmit more realistic musical instrument sounds or human voices. In terms of sound propagation, the sounding board 23 is a surface source, has a uniform sound field, and can produce 360-degree stereo sound. Its sound pressure level changes slowly with distance, and even a small sound can be transmitted to a farther position. In terms of audio, the frequency of the sound emitted by the sounding board 23 is so wide that the listener closest to the screen will not suffer from close-range sound pressure, will not feel too noisy, and the listener can still hear clearly when they are far away. The same sound quality can be obtained by listening at any position; when the listener moves from the side of the screen to the position directly opposite the screen, the high and low sounds heard by the listener will not change significantly, and the volume will not decrease. The feeling of field contraction, even if the screen is blocked to a considerable extent, will not have a significant impact on the sound quality.

Therefore, when the sound emitted by the sound board 23 is emitted along with the image, it can bring a powerful audio-visual experience to the user. In addition, the projection screen 2 is a thin-plate screen with a small size and light weight, which can bring a better look and feel to the user.

In the embodiment of the present application, the optical screen is attached to the first side of the sound board, so that when the projection device emits the projection light to the optical screen, the optical screen can reflect the projection light, thereby realizing the picture on the optical screen projection. In addition, since one or more exciters electrically connected to the projection device are fixed on the sound board, the projection device can drive the exciter to vibrate, so that the exciter drives the sound board to vibrate together to emit sound through the sound board. Since the sound board is fixed on the fixed frame and the optical screen is attached to the sound board, it can ensure that the sound board and the optical screen are in the same area. This can achieve the effect of sound from the picture, avoiding the unevenness of the picture and the sound, and improving The projection effect of the projection system is improved. Since the cover plate is buckled on one or more exciters, the amplitude of each exciter in the direction away from the sounding plate can be reduced by the cover plate, thereby reducing the energy loss when the exciter vibrates. The first elastic pad and the second elastic pad have the function of buffering and absorbing vibration, effectively avoiding the noise of the projection screen due to vibration.

FIG. 2 illustrates a schematic diagram of a rear view structure of a projection screen according to an embodiment of the present application, and FIG. 3 illustrates a schematic diagram of a side view structure of a projection screen according to an embodiment of the present application. As shown in Figures 2 and 3, the projection screen includes: a fixed frame 21, an optical screen 22, a sounding plate 23, one or more exciters 24, a cover plate 25 and a plurality of elastic connectors 26; the optical screen 22 is attached to On the first side of the sounding plate 23, one or more exciters 24 are fixed on the second side of the sounding plate 23, the cover plate 25 is buckled on the one or more exciters 24, and the edge of the sounding plate 23 can wrap the fixed frame 21 Edge, and the sound board 23 is connected to the fixed frame 21 through the fixing member 25; the optical screen 22 is used to receive the projection light emitted by the projection device 1 and display the picture, and one or more exciters 24 are used to electrically connect to the projection device 1 , One or more exciters 24 can excite the sound board 23 to vibrate to emit sound.

It should be noted that the structure of the fixed frame, the optical screen, the sound board, one or more exciters, the cover plate, and the multiple elastic connectors involved in the embodiments of the present application can be the same as the fixed frame, The structures of the optical screen, the sound board, one or more exciters, the cover plate and the multiple elastic connecting members are the same or similar, which will not be repeated in the embodiment of the present application.

In the embodiment of the present application, the optical screen is attached to the first side of the sound board, so that when the projection device emits the projection light to the optical screen, the optical screen can reflect the projection light, thereby realizing the picture on the optical screen projection. In addition, since one or more exciters electrically connected to the projection device are fixed on the sound board, the projection device can drive the exciter to vibrate, so that the exciter drives the sound board to vibrate together to emit sound through the sound board. Since the sound board is fixed on the fixed frame, and the optical screen is attached to the sound board, it can ensure that the sound board and the optical screen are in the same area, which can achieve the effect of sound from the picture, avoid the inconsistency of the picture and the sound, and improve The projection effect of the projection system is improved.

The above are only optional embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A projection system, characterized in that the projection system includes: a projection device and a projection screen, the projection screen includes a fixed frame, an optical screen, a sound board, one or more exciters, a cover plate, and a plurality of elastic connectors ；

The optical screen is attached to the first side of the sounding plate, the one or more exciters are fixed on the second side of the sounding plate, and the cover plate is buckled on the one or more exciters , The edge of the sounding board can wrap the edge of the fixed frame, and the sounding board is connected to the fixed frame through the plurality of elastic connectors;

The projection device is electrically connected to the one or more exciters, and is used to emit projection light to the optical screen, and the one or more exciters can excite the sound board to vibrate to emit sound.
The projection system according to claim 1, wherein the sound board comprises a first skin, a second skin and a honeycomb core board, and the honeycomb core board is adhered to the first skin and the honeycomb core board. Between the second skin;

The optical screen is attached to the side of the first skin away from the honeycomb core plate, and the one or more exciters are fixed on the side of the second skin away from the honeycomb core plate ；

The edges of the first skin and/or the second skin wrap the edges of the fixed frame, and the first skin and/or the second skin are connected to each other through the plurality of elastic connectors The fixed frame is connected.
The projection system according to claim 2, wherein the edges of the first skin and/or the second skin protrude from the edges of the honeycomb core panel, and the first skin and/or The part of the second skin that protrudes from the edge of the honeycomb core board wraps the edge of the fixed frame, and is connected to the fixed frame through the plurality of elastic connectors.
The projection system according to claim 1, wherein the sound board comprises a first skin, a second skin, a honeycomb core board, and a flexible connector;

The honeycomb core board is adhered tightly between the first skin and the second skin, the optical screen is attached to the first skin on the side away from the honeycomb core board, the One or more exciters are fixed on the side of the second skin away from the honeycomb core panel;

The soft connecting piece has a looped structure, the soft connecting piece surrounds the edge of the second skin, and the inner edge of the soft connecting piece is fixedly connected to the second skin, and the soft connecting piece is fixedly connected to the second skin. The outer edge of the mass connecting piece wraps the fixed frame, and is connected to the fixed frame through the plurality of elastic connecting pieces.
The projection system according to any one of claims 2-4, wherein the thickness of the first skin is greater than the thickness of the second skin.
The projection system according to claim 1, wherein the edge of the sound board is provided with a plurality of through holes corresponding to the plurality of elastic connecting members one by one, and the first end of each elastic connecting member corresponds to The second end of each elastic connecting piece is connected with the fixed frame.
The projection system according to claim 6, wherein the projection screen further comprises a plurality of eyelet buttons, the multiple eyelet buttons correspond to the plurality of through holes one-to-one, and each eyelet button wraps a corresponding through hole. On the edge of the hole, the first end of each elastic connecting piece is connected with the corresponding eyelet button.
The projection system according to claim 1, wherein the optical screen is attached to the sound board by double-sided tape.
The projection system according to claim 1, wherein the projection screen further comprises one or more foam glues corresponding to the one or more exciters, and the one or more exciters respectively It is adhered to the sound board through the corresponding foam glue.
The projection system according to claim 1, wherein the sound board is a whole board, and the area of the sound board is less than or equal to the area of the optical screen;

Alternatively, the sounding board includes a plurality of sub-sounding boards, which are integrally connected and capable of independently sounding under the action of the one or more exciters. The total of the plurality of sub-sounding boards is The area is less than or equal to the area of the optical screen.
A projection screen, characterized in that the projection screen comprises: a fixed frame, an optical screen, a sound board, one or more exciters, a cover plate, and a plurality of elastic connectors;

The optical screen is attached to the first side of the sounding plate, the one or more exciters are fixed on the second side of the sounding plate, and the cover plate is buckled on the one or more exciters , The edge of the sounding board can wrap the edge of the fixed frame, and the sounding board is connected to the fixed frame through the plurality of elastic connectors;

The optical screen is used to receive the projection light emitted by the projection device and perform screen display, the one or more exciters are used to electrically connect with the projection device, and the one or more exciters can excite the sound board Vibrate to make a sound.