Projection system and projection screen

Abstract

The present application discloses a projection system and a projection screen, belonging to the field of projection technology. 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 sound board, one or more exciters are fixed to the second side of the sound board, the cover plate is buckled on one or more exciters, the edge of the sound board can wrap the edge of the fixed frame, and the sound board is connected to the fixed frame through a plurality of elastic connectors; the projection device is electrically connected to one or more exciters and is used to emit projection light to the optical screen, and one or more exciters can excite the sound board to vibrate to emit sound. In the present application, the optical screen and the sound board are fixed in the same area through the fixed frame, so that the effect of sound emitting from the picture can be achieved, and the projection effect of the projection system is improved.

Description

Technical Field

[0001] This application relates to the field of projection technology, and particularly relates to a projection system and a projection screen. Background Art

[0002] With the continuous development of technology, projection systems are increasingly applied to people's work and life. Currently, a projection system mainly includes a projection device and a projection screen. Among them, the projection device is mainly used to emit projection light, and the projection screen is fixed on a support and is used to reflect the emitted projection light to achieve the projection of a picture.

[0003] In related technologies, taking a laser TV as an example of a projection system, a laser TV may 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 emitted by the projection host and form a picture after reflection.

[0004] However, when realizing the display of a picture and the playback of audio data in the above manner, the projection host and the optical screen are necessarily not in the same position, so it is easy to cause the situation that the picture and the sound are not unified, thereby reducing the projection effect of the projection system. Summary of the Invention

[0005] This application provides a projection system and a projection screen, which can solve the problem of non-uniformity between the picture and the sound in related technologies. The technical solutions are as follows:

[0006] On the one hand, a projection system, the projection system includes: a projection device and a projection screen, the projection screen includes a fixed frame, an optical screen, a sounding board, one or more exciters, a cover plate, and a plurality of elastic connectors;

[0007] The optical screen is attached to the first side of the sounding board, the one or more exciters are fixed to the second side of the sounding board, 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;

[0008] 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 sounding board to vibrate to emit sound.

[0009] In a possible implementation manner, the sounding board includes a first skin, a second skin, and a honeycomb core board, and the honeycomb core board is adhered tightly between the first skin and the second skin;

[0010] The optical screen is attached to one side of the first skin away from the honeycomb core board, and the one or more exciters are fixed to one side of the second skin away from the honeycomb core board;

[0011] 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 the fixed frame through the plurality of elastic connectors.

[0012] Optionally, the edges of the first skin and / or the second skin extend beyond the edges of the honeycomb core board, and the portions of the first skin and / or the second skin that extend beyond the edges of the honeycomb core board wrap the edges of the fixed frame and are connected to the fixed frame through the plurality of elastic connectors.

[0013] Optionally, the sound - producing panel includes a first skin, a second skin, a honeycomb core board, and soft connectors;

[0014] The honeycomb core board is adhered tightly between the first skin and the second skin, the optical screen is attached to one side of the first skin away from the honeycomb core board, and the one or more exciters are fixed to one side of the second skin away from the honeycomb core board;

[0015] The soft connector is in a loop structure, the soft connector surrounds the edge of the second skin, the inner edge of the soft connector is fixedly connected to the second skin, the outer edge of the soft connector wraps the fixed frame, and is connected to the fixed frame through the plurality of elastic connectors.

[0016] Optionally, the thickness of the first skin is greater than the thickness of the second skin.

[0017] Optionally, a plurality of through - holes corresponding one - to - one to the plurality of elastic connectors are provided at the edge of the sound - producing panel, the first end of each elastic connector is connected to the corresponding through - hole, and the second end of each elastic connector is connected to the fixed frame.

[0018] Optionally, the projection screen further includes a plurality of eyelets, the plurality of eyelets correspond one - to - one to the plurality of through - holes, each eyelet wraps the edge of the corresponding through - hole, and the first end of each elastic connector is connected to the corresponding eyelet.

[0019] Optionally, the optical screen is attached to the sound - producing panel through double - sided tape.

[0020] Optionally, the projection screen further includes one or more foam tapes corresponding one - to - one to the one or more exciters, and the one or more exciters are respectively adhered to the sound - producing panel through the corresponding foam tapes.

[0021] Optionally, the sound - generating plate is a single - piece plate, and the area of the sound - generating plate is less than or equal to the area of the optical screen;

[0022] Alternatively, the sound - generating plate includes multiple sub - sound - generating plates, the multiple sub - sound - generating plates are integrally connected, and can independently generate sound under the action of the one or more exciters, and the total area of the multiple sub - sound - generating plates is less than or equal to the area of the optical screen.

[0023] On the other hand, a projection screen includes: a fixed frame, an optical screen, a sound - generating plate, one or more exciters, a cover plate, and a plurality of elastic connectors;

[0024] The optical screen is attached to the first side of the sound - generating plate, the one or more exciters are fixed to the second side of the sound - generating plate, the cover plate is buckled on the one or more exciters, the edge of the sound - generating plate can wrap the edge of the fixed frame, and the sound - generating plate is connected to the fixed frame through the plurality of elastic connectors;

[0025] The optical screen is used to receive the projection light emitted by the projection device and display an image. The one or more exciters are used to be electrically connected to the projection device, and the one or more exciters can excite the sound - generating plate to vibrate to emit sound.

[0026] The beneficial effects of the technical solution provided by this application can at least include:

[0027] Attach the optical screen to the first side of the sound - generating plate. When the projection device emits projection light to the optical screen, the optical screen can reflect the projection light, so as to realize the projection of the image on the optical screen. In addition, since one or more exciters electrically connected to the projection device are fixed on the sound - generating plate, the projection device can drive the exciters to vibrate, and then drive the sound - generating plate to vibrate together through the exciters, so as to emit sound through the sound - generating plate. Since the sound - generating plate is fixed on the fixed frame and the optical screen is attached to the sound - generating plate, it can ensure that the sound - generating plate and the optical screen are in the same area, so as to achieve the effect that the sound emits from the image, avoid the situation of inconsistent image and sound, and improve the projection effect of the projection system. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1is a side view structural diagram of a projection system provided in an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of a rear view structure of a projection screen provided in an embodiment of the present application;

[0031] Figure 3 is a schematic diagram of a side view structure of a projection screen provided in an embodiment of the present application;

[0032] Figure 4 is a schematic diagram of a partial structure of a first skin provided in an embodiment of the present application;

[0033] Figure 5 is a schematic diagram of a partial structure of another first skin provided in an embodiment of the present application;

[0034] Figure 6 is a schematic diagram of a partial structure of a projection screen provided in an embodiment of the present application;

[0035] Figure 7 It is a schematic diagram of the rear view structure of another projection screen provided in an embodiment of the present application.

[0036] Reference numerals:

[0037] 1: Projection equipment; 2: Projection screen

[0038] 21: fixed frame; 22: optical screen; 23: sound board; 24: exciter; 25: cover plate; 26: elastic connector; 27: eyelet;

[0039] 211: inner frame; 212: outer frame; 231: first skin; 232: second skin; 233: honeycomb core panel; 234: soft connector. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0041] Figure 1 A schematic diagram of a side view structure of a projection system according to an embodiment of the present application is illustrated. Figure 2 A schematic diagram of the rear view structure of a projection screen according to an embodiment of the present application is illustrated. Figure 3 The side view structure diagram of a projection screen according to an embodiment of the present application is illustrated. Figure 1 , Figure 2 and Figure 3As shown in the figure, 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 - emitting plate 23, one or more exciters 24, 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 sound - emitting plate 23, one or more exciters 24 are fixed to the second side of the sound - emitting plate 23, the cover plate 25 is buckled on the one or more exciters 24, the edge of the sound - emitting plate 23 can wrap the edge of the fixed frame 21, and the sound - emitting plate 23 is connected to the fixed frame 21 through a plurality of elastic connectors 26; the projection device 1 is electrically connected to one or more exciters 24 and is used to emit projection light to the optical screen 22, and one or more exciters 24 can excite the sound - emitting plate 23 to vibrate to emit sound.

[0042] In the embodiment of the present application, the optical screen 22 is attached to the first side of the sound - emitting plate 23. When the projection device 1 emits projection light to the optical screen 22, the optical screen 22 can reflect the projection light, so as to realize the projection of the picture on the optical screen 22. In addition, since one or more exciters 24 electrically connected to the projection device 1 are fixed on the sound - emitting plate 23, the projection device 1 can drive the exciters 24 to vibrate, and then drive the sound - emitting plate 23 to vibrate together through the exciters 24, so as to emit sound through the sound - emitting plate 23. Since the sound - emitting plate 23 is fixed on the fixed frame 21 and the optical screen 22 is attached to the sound - emitting plate 23, it can be ensured that the sound - emitting plate 23 and the optical screen 22 are in the same area, so that the effect of sound emitting from the picture can be achieved, avoiding the situation of inconsistent picture and sound, and improving the projection effect of the projection system.

[0043] Among them, the optical screen 22 may include optical film sheets, and of course, it may also include other structures as long as it can realize the display of the picture. The embodiment of the present application does not limit this.

[0044] Among them, the fixed frame 21 may be a frame - type structure, and the fixed frame 21 may be a rectangular, circular or other shaped structure with a hollow area. Of course, the fixed frame 21 may also be other non - hollow frame structures as long as it can realize the connection with the sound - emitting plate 23. In addition, the fixed frame 21 can be used to connect to a support body to realize the fixed support of the entire projection screen 2. The support body can be a fixed bracket or a wall, etc., as long as it can realize the fixed support of the projection screen.

[0045] It should be noted that the fixed frame 21 may further include an inner frame 211 and an outer frame 212. In this way, the sound - emitting plate 23 can be connected to the inner frame 211 through the elastic connectors 26, and then the outer frame 212 can be wrapped around the inner frame 211, so as to be able to block the edge of the sound - emitting plate 23 through the outer frame 212, making the projection screen 2 more beautiful.

[0046] In some embodiments, the edge of the sound - emitting panel 23 is connected to the fixed frame 21, so that the central area of the sound - emitting panel 23 is located in the central area of the fixed frame 21, facilitating the bonding of the optical screen 22 to the central area of the sound - emitting panel 23, while ensuring that the sound emitted by the sound - emitting panel 23 can be located at the center position.

[0047] In some embodiments, the sound - emitting panel 23 can be a single - piece board, and the area of the sound - emitting panel 23 is less than or equal to the area of the optical screen 22; or, the sound - emitting panel 23 can include multiple sub - sound - emitting panels 233. The multiple sub - sound - emitting panels 233 are integrally connected and can independently emit sound under the action of one or more exciters 24, and the total area of the multiple sub - sound - emitting panels 233 is less than or equal to the area of the optical screen 22.

[0048] When the sound - emitting panel 23 is composed of multiple sub - sound - emitting panels, the multiple sub - sound - emitting panels can be integrally connected to obtain the sound - emitting panel 23, and then the optical screen 22 can be bonded to the sound - emitting panel 23.

[0049] In some embodiments, the sound - emitting panel 23 can include a first skin 231, a second skin 232, and a honeycomb core board 233. The honeycomb core board 233 is adhered tightly between the first skin 231 and the second skin 232; the optical screen 22 is bonded to the side of the first skin 231 away from the honeycomb core board 233, and one or more exciters 24 are fixed to the side of the second skin 232 away from the honeycomb core board 233; the edges of the first skin 231 and / or the second skin 232 wrap 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 connectors 26.

[0050] Wherein, on the side of the first skin 231 in contact with the honeycomb core board 233 and on the side of the second skin 232 in contact with the honeycomb core board 233, a layer of PU (poly urethane) glue can be provided. The PU glue can adhere the first skin 231 and the second skin 232 tightly to the honeycomb core board 233, and at the same time can soften the first skin 231 and the second skin 232, so that the first skin 231 and the second skin 232 can withstand the action of tension. After bonding the first skin 231 to the honeycomb core board 233, the indirect connection between the honeycomb core board 233 and the optical screen 22 can be realized through the bonding of the first skin 231 and the optical screen 22.

[0051] Wherein, the edges of the first skin 231 and / or the second skin 232 can extend beyond the edge of the honeycomb core board 233. The part of the first skin 231 and / or the second skin 232 that extends beyond the edge of the honeycomb core board 233 wraps the edge of the fixed frame 21 and is connected to the fixed frame 21 through a plurality of elastic connectors 26.

[0052] When the first skin 231 is connected to the fixed frame 21 through the elastic connecting member 26, a circle can be cut off around the edge of the second skin 232 first, and then the corresponding honeycomb core board 233 of this circle of skin can be removed to ensure that the edge of the first skin 231 extends out of the edge of the honeycomb core board 233. Furthermore, the part of the first skin 231 that extends out of the edge of the honeycomb core board 233 can be connected to the fixed frame 21 through the elastic connecting member 26.

[0053] Furthermore, when connecting the part of the first skin 231 that extends out of the edge of the honeycomb core board 233 to the fixed frame 21, make the part of the first skin 231 that extends out of the honeycomb core board 233 be located on the first side of the fixed frame 21 and extend out of the edge of the fixed frame 21. Then, turn over the extended part of the first skin 231 towards the second side of the fixed frame 21 so that the edge of the first skin 231 wraps around the fixed frame 21. After that, connect the edge of the first skin 231 to the fixed frame 21 through the elastic connecting member 26.

[0054] It should be noted that when folding the distribution of the part of the first skin 231 that extends out of the honeycomb core board 233, in order to facilitate folding at the four corners of the first skin 231, in some embodiments, such as Figure 4 and Figure 5 as shown, the four corners of the first skin 231 can be cut off.

[0055] 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 Figure 3 shown, the connection between the second skin 232 and the fixed frame 21 can be realized in a similar manner as above, and the embodiments of the present application will not be elaborated herein.

[0056] Among them, 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 off around the edge of the honeycomb core board 233. Then, the connection between the first skin 231 and the second skin 232 and the fixed frame 21 can be realized in a similar manner as above, and the embodiments of the present application will not be elaborated herein.

[0057] In other embodiments, such as Figure 6As shown, the sound - generating panel 23 includes a first skin 231, a second skin 232, a honeycomb core board 233, and a soft connector 234. The honeycomb core board 233 is adhered tightly between the first 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. One or more exciters 24 are fixed to the side of the second skin 232 away from the honeycomb core board 233. The soft connector 234 has a loop - shaped structure. The soft connector 234 surrounds the edge of the second skin 232, and the inner edge of the soft connector 234 is fixedly connected to the second skin 232. The outer edge of the soft connector 234 wraps the fixed frame 21 and is connected to the fixed frame 21 through a plurality of elastic connectors 26.

[0058] Among them, the soft connector 234 can be a soft cloth. Exemplarily, the soft connector 234 can be a synthetic cloth to ensure that the soft cloth has good ductility, so that it can be in a taut state under external force and will not deform.

[0059] When the soft connector 234 is a soft cloth, the connection between the soft connector 234 and the fixed frame 21 can be achieved by using the connection method between the first skin 231 and the fixed frame 21 as described above. It should be noted that when the soft connector 234 is connected to the second skin 232, it can be adhered by double - sided tape or other means, and the embodiments of the present application do not limit this.

[0060] It should be noted that the soft connector 234 can also be fixedly connected to the first skin 231. The connection method can be the same as the connection method between the soft connector 234 and the second skin 232 as described above, and then the soft connector 234 is connected to the fixed frame 21. When connecting the soft connector 234 to the fixed frame 21, the edges of the first skin 231, the second skin 232, and the honeycomb core board 233 do not need to be cut as long as the connection between the sound - generating panel 23 and the soft connector 234 can be achieved.

[0061] 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, next, the first skin 231, the second skin 232, and the honeycomb core board 233 in any one of the above two embodiments will be introduced.

[0062] Among them, the first skin 231 and the second skin 232 can be fiber skins. Since the extension direction of the fiber can be a single direction or an interwoven direction, and the tensile strength of the fiber is large, when the first skin 231 and / or the second skin 232 are connected to the fixed frame 21 through the elastic connectors 26, they can be tightened by the elastic connectors 26 and are not easily damaged.

[0063] It should be noted that the materials 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 lightweight aluminum, etc. The thicknesses of both the first skin 231 and the second skin 232 can be within the range of 0.1 - 0.5 mm. Further, the thicknesses of both the first skin 231 and the second skin 232 can be within the range of 0.18 - 0.36 mm. The thicknesses of the first skin 231 and the second skin 232 can be different as long as they are within the above thickness range.

[0064] Among them, the honeycomb core panel 233 is a honeycomb core panel with a cross-section of a plurality of hollow hexagonal honeycomb cells closely arranged. Each hexagonal honeycomb cell in the honeycomb core panel 233 includes at least a pair of parallel honeycomb walls, and there is a pair of parallel honeycomb walls perpendicular to the horizontal plane. Exemplarily, the material of the honeycomb core panel 233 can be paper, aramid, metal or other composite materials.

[0065] It should be noted that the distance between a pair of parallel honeycomb walls is within the range of 3 - 10 mm, and the ratio of the distance between a pair of parallel honeycomb walls to the distance between two opposite vertices on the cross-section of the honeycomb cell is less than 0.58.

[0066] It should also be noted that the sound - generating plate 23 can also only include the honeycomb core panel 233, or only include the honeycomb core panel 233 and the first skin 231, or only include the honeycomb core panel 233 and the second skin 232, as long as the optical screen 22 and the actuator 24 can be fixed on the sound - generating plate 23, and the honeycomb core panel 233 is fixedly connected to the fixed frame 21. The embodiments of the present application do not make any limitations in this regard.

[0067] In some embodiments, the optical screen 22 can be attached to the sound - generating plate 23 through double - sided tape, that is, the optical screen 22 can be attached to the side of the first skin 231 away from the honeycomb core panel 233 through double - sided tape. Of course, the optical screen 22 can also be attached to the sound - generating plate 23 by other means, and the embodiments of the present application do not make any limitations in this regard.

[0068] It should be noted that since the optical screen 22 is made of a semi - transparent material, it is easy to observe the structure of the sounding board 23 through the optical screen 22. If the surface of the sounding board 23 is not flat enough, it is easy to observe the pits and protrusions on the sounding board 23. In addition, the unevenness of the surface of the sounding board 23 will also make the optical screen 22 uneven. Therefore, in some embodiments, the thickness of the first skin 231 can be made greater than the thickness of the second skin 232. By extruding the honeycomb core board 233 with the first skin 231, the unevenness of the honeycomb core board 233 is shown on the side where the second skin 232 is located, so as to improve the flatness of the first skin 231, and further improve the flatness of the optical screen 22.

[0069] In some embodiments, as Figure 7 shown, a plurality of through - holes corresponding one - to - one to a plurality of elastic connectors 26 can be provided at the edge of the sounding board 23. The first end of each elastic connector 26 is connected to the corresponding through - hole, and the second end of each elastic connector 26 is connected to the fixed frame 21. Exemplarily, the plurality of elastic connectors 26 can be a plurality of tension springs.

[0070] It should be noted that for the size of each through - hole, as long as it is ensured that the first end of the elastic connector 26 can extend into the corresponding through - hole. The elastic connector 26 can not only play the role of tightening the sounding board 23, but also play a certain role in damping and buffering based on the elastic deformation of the plurality of elastic connectors 26 when the sounding board 23 vibrates, so as to prevent the vibration of the sounding board 23 from driving the fixed frame 21 to vibrate, thereby reducing the noise generated by the vibration of the fixed frame 21.

[0071] In some embodiments, the plurality of through - holes can be arranged at the edge of the first skin 231 and / or the second skin 232, or at the outer edge of the soft cloth. Of course, the plurality of through - holes can also be arranged only on two opposite side edges of the first skin 231 and / or the second skin 232, or on two opposite side edges of the soft cloth.

[0072] Exemplarily, six through - holes can be respectively arranged on two opposite side edges of the first skin 231 and / or the second skin 232, or six through - holes can be respectively arranged on two opposite side edges of the soft cloth. Among them, two through - holes can be arranged at the middle position of a corresponding side edge, and the remaining four through - holes can be symmetrically arranged at both ends of a corresponding side edge.

[0073] In some embodiments, among the plurality of elastic connectors 26, there are at least two first sub-elastic connectors and / or at least two second sub-elastic connectors; for each first sub-elastic connector among the at least two first sub-elastic connectors, the angle between the straight line where the first sub-elastic connector is located and a side edge of the sound-generating plate 23 is within a reference angle range, and for each second sub-elastic connector among the at least two second sub-elastic connectors, the straight line where the second sub-elastic connector is located is perpendicular or parallel to a side edge of the sound-generating plate 23.

[0074] Among them, the reference angle range can refer to an angle range greater than 0 degrees and less than 90 degrees. In this way, the first sub-elastic connectors are arranged obliquely relative to the side edges of the sound-generating plate 23, so that the tension of the first sub-elastic connectors can generate a component force in both the horizontal and vertical directions, so that the entire sound-generating plate 23 can be stressed in both the vertical and horizontal directions. In this way, the upper and lower sides or the left and right sides of the sound-generating plate 23 can be connected to the fixed frame 21 only through at least two second sub-elastic connectors, thereby reducing the number of second sub-elastic connectors.

[0075] Among them, there is an optimal value for the angle between the straight line where the first sub-elastic connector is located and a vertical side edge of the sound-generating plate 23, and this optimal value can be obtained through the following formula:

[0076]

[0077] In the above formula, θ is the angle between the straight line where the first sub-elastic connector is located and a vertical side edge of the sound-generating plate 23, X is the total length of the elastic connector 26 when placed vertically, Y is the total length of the elastic connector 26 when placed obliquely, and L is the original length of the spring.

[0078] It should be noted that there can be a deviation of ±5° for this angle. The plurality of elastic connectors 26 can be symmetrically distributed on two opposite side edges of the sound-generating plate 23, so as to ensure that the sound-generating plate 23 is stressed evenly in two opposite directions, and prevent the elastic connectors 26 from pulling the sound-generating plate 23 out of shape or causing uneven stress on a certain area of the sound-generating plate 23, resulting in damage.

[0079] Furthermore, when connecting the sound-generating plate 23 and the fixed frame 21 through the elastic connectors 26, the projection screen 2 can further include a plurality of eyelets 27. The plurality of eyelets 27 correspond to a plurality of through holes on the sound-generating plate 23 one by one. Each eyelet 27 wraps the edge of the corresponding through hole, and the first end of each elastic connector 26 is connected to the corresponding eyelet 27.

[0080] In this way, the first end of the elastic connecting member 26 can pass through the corresponding eyelet button 27 to achieve connection with the sounding board 23, so as to ensure that the acting force between the elastic connecting member 26 and the sounding board 23 can be evenly distributed on the eyelet button 27, thereby avoiding damage to the sounding board 23 due to excessive local stress.

[0081] In the embodiment of the present application, one or more exciters 24 can be elastically connected to the sounding board 23. At this time, the projection screen 2 can further include one or more foam adhesives corresponding to the one or more exciters 24 one by one, and the one or more exciters 24 are respectively adhered to the sounding board 23 through the corresponding foam adhesives.

[0082] When the exciter 24 is working, it needs to make a reciprocating motion in the normal direction of the sounding board 23. At the same time, when the exciter 24 approaches the sounding board 23, it can transmit sound waves to the sounding board 23, causing the entire plate surface of the sounding board 23 to vibrate together. Since the foam adhesive has a certain elasticity, it can ensure that while adhering the exciter 24, the exciter 24 can make a reciprocating motion in the normal direction of the sounding board 23.

[0083] In some embodiments, the projection screen 2 can further include one or more elastic bodies corresponding to the one or more exciters 24 one by one. Each elastic body is fixed on the corresponding exciter 24, and the cover plate 25 is buckled on the one or more elastic bodies and is fixedly connected to the sounding board 23 and / or the fixed frame 21.

[0084] It should be noted that since the cover plate 25 is buckled on the one or more elastic bodies, the amplitude of each exciter 24 in the direction away from the sounding board 23 can be reduced through the cover plate 25, thereby reducing the energy loss when the exciter 24 vibrates. 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.

[0085] In some embodiments, at least one annular foam can exist in the one or more elastic bodies. Each annular foam is sleeved on the corresponding exciter 24 and is glued to the corresponding exciter 24.

[0086] It should be noted that since the annular foam can undergo elastic deformation due to extrusion between the exciter 24 and the cover plate 25, the annular foam glued to the exciter 24 can prevent hard contact between the exciter 24 and the cover plate 25, avoiding unnecessary friction and noise. When the exciter 24 vibrates, due to the certain thickness of the annular foam, when the exciter 24 and the cover plate 25 are in indirect contact, the amplitude of the exciter 24 can also be limited by the annular foam, thereby reducing the energy loss of the exciter 24 in the direction away from the sounding board 23.

[0087] Exemplarily, the annular foam can be bonded to the actuator 24 by double-sided tape, or can be glued to the actuator 24 by other means. The embodiments of the present invention do not limit this.

[0088] In some embodiments, at least one spring may also be present in one or more elastomers. The first end of each spring can be glued to the corresponding actuator 24, and the second end of each spring can be glued to the cover plate 25. Since the spring can undergo elastic deformation due to extrusion between the actuator 24 and the cover plate 25, each spring in at least one spring can form an elastic buffer between the corresponding actuator 24 and the cover plate 25. At the same time, when the actuator 24 is in indirect contact with the cover plate 25 through the spring, the spring can also limit the amplitude of the actuator 24, thereby reducing the energy loss of the actuator 24 in the direction away from the sounding board 23.

[0089] Since the two ends of each spring are respectively connected to the corresponding actuator 24 and the cover plate 25, hard contact between each spring and the actuator 24 and / or the cover plate 25 can be avoided, and unnecessary friction and noise can be avoided.

[0090] In some embodiments, one or more ventilation holes corresponding to one or more actuators 24 can be provided on the cover plate 25. In this way, when the actuator 24 vibrates, the gas on both sides of the cover plate 25 can be exchanged through the ventilation holes. That is, when the actuator 24 vibrates, the ventilation holes can balance the air pressure difference on both sides of the cover plate 25, making the air flow on both sides of the cover plate 25 smoother.

[0091] In some embodiments, the cover plate 25 can be in a strip structure. The two ends of the cover plate 25 are fixedly connected to the fixed frame 21. One or more grooves corresponding to one or more actuators 24 can be provided on the cover plate 25. The side of each actuator 24 away from the sounding board 23 is located in the corresponding groove.

[0092] It should be noted that, in order to prevent hard contact between the actuator 24 and the cover plate 25, there is a gap between the side surface and the bottom surface of the groove and the actuator 24. The shape of the groove can be the same as or similar to the shape of the actuator 24. When the actuator 24 falls off from the sounding board 23, the groove corresponding to each actuator 24 can limit the actuator 24 in the vertical direction and can temporarily carry the fallen actuator 24.

[0093] It should be noted that one or more ribs can be provided on the cover plate 25 along the length direction. When the number of one or more ribs is multiple, the multiple ribs can be evenly 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 actuator 24, and at the same time enhance the stability of the cover plate 25.

[0094] In some embodiments, the cover plate 25 may be in a straight strip structure. Of course, the cover plate 25 may also be in a bent strip structure, as long as it can play a role in fastening the actuator 24. For example, when multiple actuators 24 are arranged in a straight line on the sound - generating plate 23, the cover plate 25 can be a straight - strip cover plate 25. When multiple actuators 24 are arranged in a non - straight line on the sound - generating plate 23, the cover plate 25 can be set as a bent cover plate 25 according to the distribution form of the actuators 24.

[0095] Wherein, both ends of the cover plate 25 can be fixedly connected to the fixed frame 21 by screws. Of course, it can also be fixedly connected to the fixed frame 21 by other means, and the embodiments of the present invention do not limit this.

[0096] In some embodiments, the projection screen 2 may further include one or more support mechanisms. Each support mechanism may include a hanging bracket and a first elastic pad; the support arm of the hanging bracket extends into the hanging groove of the fixed frame 21, the first elastic pad is buckled on the support arm of the hanging bracket, and can fill the gap between the support arm of the hanging bracket and the side wall of the hanging groove. The fixed arm of the hanging bracket is used to connect to the support body.

[0097] Wherein, a connecting section may be provided between the support arm and the fixed arm of the hanging bracket to realize the connection between the support arm and the fixed arm. The support arm, the connecting end and the fixed arm can be connected into a U - shaped structure, or a structure in which the orientation of one end of the support arm far from the connecting section is opposite to the orientation of one end of the fixed arm far from the connecting section. The support arm, the connecting end and the fixed arm can be obtained by integrally molding to increase the overall strength of the hanging bracket.

[0098] Exemplarily, the support arm is perpendicularly connected to the first end of the connecting section, and the fixed arm is perpendicularly connected to the second end of the connecting section. At this time, the connecting section can be used as a support platform.

[0099] Wherein, the material of the first elastic pad can be silicone or other materials, as long as it has buffering and vibration - absorbing and load - bearing capabilities.

[0100] In some embodiments, the first elastic pad may be in 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 hanging bracket. In this way, the support arm of the hanging bracket can be stuck 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, the gap between the support arm of the hanging bracket and the hanging groove can be filled by the first side wall and the second side wall of the first elastic pad to avoid hard contact between the support arm and the hanging groove, thereby realizing vibration reduction between the hanging bracket and the hanging groove.

[0101] Among them, the sum of the thicknesses of the first side wall, the second side wall of the first elastic pad and the thickness of the support arm can be equal to the vertical distance between two opposite inner walls of the hanging groove, so as to avoid possible shaking between the first elastic pad and the fixed frame 21.

[0102] In some 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.

[0103] Among them, the first elastic pad with an S-shaped structure means that there are two U-shaped grooves, and the openings of the two U-shaped grooves face in opposite directions. When the support arm of the hanging rack extends into the hanging groove to support the fixed frame 21, the gaps 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, so as to achieve primary vibration reduction between the hanging rack and the hanging groove. The gap between the support platform and the side wall of the hanging groove is filled by the bottom of the second U-shaped groove, thereby achieving secondary vibration reduction between the hanging rack and the hanging groove.

[0104] Among them, 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 can be parallel to each other, and the first side 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.

[0105] Among them, 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 can be equal to the vertical distance between two opposite inner walls of the hanging groove, so as to avoid possible shaking between the first elastic pad and the fixed frame 21.

[0106] It should be noted that, in order to enable the first U-shaped groove of the first elastic pad to be buckled on the support arm and the second U-shaped groove to be buckled on the side wall of the hanging groove, the vertical distance between the first side wall and the connecting wall of the first elastic pad can be equal to the thickness of the support arm of the hanging rack, and the vertical distance between the second side wall and the connecting wall of the first elastic pad can be greater than or equal to the thickness of the side wall of the hanging groove.

[0107] Among them, when the vertical distance between the second side wall and the connecting wall of the first elastic pad 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 wall of the hanging groove to further tighten the connection between the hanging rack and the fixed frame 21. When the vertical distance between the second side wall and the connecting wall of the first elastic pad is greater than the thickness of the side wall of the hanging groove, it is convenient for the hanging groove to be smoothly stuck into the gap between the second side wall and the connecting wall of the first elastic pad when hanging and installing the fixed frame 21.

[0108] Of course, in order to enable the first U-shaped groove of the first elastic pad to be buckled on the support arm and the second U-shaped groove to be buckled on the side wall of the hanging groove, the vertical distance between the first side wall of the first elastic pad and the connecting wall can also be slightly smaller than the thickness of the support arm of the hanging rack, and the vertical distance between the second side wall of the first elastic pad and the connecting wall can also be slightly smaller than the thickness of the side wall of the hanging groove. Thus, the fitting manner between the first elastic pad and the hanging rack, as well as between the first elastic pad and the hanging groove, can be interference fit, which can ensure the tightness among the hanging rack, the first elastic pad, and the fixed frame 21.

[0109] 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 hanging rack by double-sided tape, and the double-sided tape can prevent the first elastic pad from shifting and falling off. The first side wall and the connecting wall of the first elastic pad can also be fixed on the support arm of the hanging rack by double-sided tape to achieve a more secure fixation of the first elastic pad.

[0110] In some embodiments, the hardness of the first elastic pad can be within the hardness threshold range. The hardness threshold range can be a hardness range that ensures the first elastic pad is not easily deformed and has a certain vibration absorption capacity. If the hardness of the first elastic pad is too low, it is easily deformed under external force, unable to tightly buckle the hanging rack and the fixed frame 21, which easily causes the fixed frame 21 to shake and tilt, resulting in the easy dropping of the fixed frame 21. If the hardness of the first elastic pad is too high, the vibration absorption capacity of the first elastic pad will be weakened. Exemplarily, the hardness of the first elastic pad can be controlled within the range of 30 to 40 Shore hardness degrees.

[0111] In some embodiments, chamfers can be provided at the opening edges of the first U-shaped groove and the second U-shaped groove of the first elastic pad, so that the first U-shaped groove can be smoothly buckled on the support arm and the second U-shaped groove can be smoothly buckled on the side wall of the hanging groove during installation. Of course, chamfers can also be provided at both ends of the first connecting portion on the first elastic pad that are connected to the first side wall and the connecting wall, so that the first side wall and the connecting wall of the first elastic pad can more smoothly extend into the hanging groove.

[0112] In some embodiments, each support mechanism can further include a second elastic pad and a fixing member; a through hole is provided on the fixed arm of the hanging rack, a circular groove is provided on the side wall of the second elastic pad, and the fixed arm of the hanging rack can be snapped into the groove based on the through hole. The fixing member passes through the through hole and the second elastic pad and is connected to the support body.

[0113] Among them, the material of the second elastic pad can be silica gel or other materials, as long as it has buffering and vibration absorption capabilities and load-bearing capacity. In this way, since the second elastic pad can avoid hard contact between the fixing arm of the hanging bracket and the fixing member, and between the fixing arm of the hanging bracket and the support body, and the second elastic pad has the function of buffering and vibration absorption, it can avoid the generation of noise between the fixing member and the fixing arm, and between the support body and the fixing arm, thereby achieving vibration reduction between the hanging bracket and the support body.

[0114] Among them, the end face of the second elastic pad can be circular, square or other shapes. In order to enable the second elastic pad to be tightly embedded on the fixing arm of the hanging bracket based on the through hole on the hanging bracket, the shape and size of the cross section at the groove of the second elastic pad can be the same as those of the through hole on the hanging bracket, and the through hole can be circular, square or other shapes.

[0115] Among them, the fixing member can include a fixing screw or other fixing body, as long as it can fix the second elastic pad and the hanging bracket tightly on the support body.

[0116] In some embodiments, each support mechanism can further include a gasket. The gasket is sleeved on the fixing member and can be pressed against the end face of the second elastic pad.

[0117] Among them, when the fixing member is a screw, the gasket can be sleeved on the screw rod of the fixing screw and contact the screw head, and is pressed by the screw head against the end face of the second elastic pad.

[0118] During actual use, the material of the second elastic pad is relatively soft. When the hanging bracket is subjected to an external force perpendicular to the end face of the second elastic pad, a certain force will be applied to the second elastic pad, which easily causes elastic deformation of the second elastic pad, and then the hanging bracket is easily disengaged from the second elastic pad based on the through hole. Therefore, the size of the gasket can be larger than that of the through hole, so as to prevent the hanging bracket from disengaging, and at the same time, the external force can be distributed to the gasket with a larger area, making it difficult for the second elastic pad to deform. In addition, the shape of the gasket can also be circular, square or other shapes.

[0119] Among them, the gasket can be made by die casting process, with a relatively smooth surface and high precision. Of course, the gasket can also be made by other manufacturing processes, and the embodiments of the present invention do not limit this.

[0120] In the embodiments of the present invention, the first elastic pad can achieve primary vibration reduction and secondary vibration reduction of the projection screen 2, and the second elastic pad can achieve tertiary 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.

[0121] In summary, the projection screen 2 provided with the sound - emitting panel 23 has dual physical functions of image display and sound playback. The projection system no longer needs to use traditional speakers. The combination of this sound - emitting panel 23 and the optical screen 22 can achieve the effect of EVS (Excited Voicing Screen). The multiple exciters 24 fixed on the sound - emitting panel 23 can excite the sound - emitting panel 23 at different positions, so that the sound - emitting panel 23 can emit stereo bending sound waves.

[0122] It should be noted that the way the exciter 24 drives the sound - emitting panel 23 to emit sound has excellent performance in many aspects. In terms of timbre, the amplitude of the sound - emitting panel 23 is a micron - level small amplitude, with small distortion, excellent transient response, high sound restoration, appropriate intensity, high clarity and good spatial depth. Therefore, the sound - emitting panel 23 can transmit more realistic instrument sounds or human voices, etc. In terms of sound propagation, the sound - emitting panel 23 is a surface sound source, with a uniform sound field, and can emit 360 - degree stereo sound. Its sound pressure level changes slowly with distance. Even a very small sound can be transmitted to a farther position. In terms of audio, the frequency range of the sound emitted by the sound - emitting panel 23 is extremely wide, so that the listeners closest to the screen will not be impacted by the close - range sound pressure and will not feel overly noisy. When the listeners are far away, they can still hear clearly. The sound quality is the same at any listening position. When the listeners move from the side of the screen to the position directly facing the screen, there will be no obvious change in the high and low tones heard by the listeners, nor will there be a feeling of volume reduction or sound field contraction. Even when the screen is blocked to a considerable extent, it will not have a significant impact on the sound quality.

[0123] Therefore, when the sound emitted by the sound - emitting panel 23 is accompanied by the image, it can bring a powerful audio - visual experience to the user. In addition, the projection screen 2 is a thin - plate - type screen, with a small volume and light weight, which can bring a better visual experience to the user.

[0124] In the embodiment of the present application, an optical screen is attached to the first side of the sound - emitting plate. When the projection device emits projection light to the optical screen, the optical screen can reflect the projection light, thereby realizing the projection of the picture on the optical screen. In addition, since one or more exciters electrically connected to the projection device are fixed on the sound - emitting plate, the projection device can drive the exciters to vibrate, and then drive the sound - emitting plate to vibrate together through the exciters, so as to emit sound through the sound - emitting plate. Since the sound - emitting plate is fixed on the fixed frame and the optical screen is attached to the sound - emitting plate, it can ensure that the sound - emitting plate and the optical screen are in the same area, thus achieving the effect that the sound emits from the picture, avoiding the situation of inconsistent picture and sound, and improving the projection effect of the projection system. Since the cover plate is buckled on one or more exciters, the amplitude of each exciter in the direction away from the sound - emitting plate can be reduced, thereby reducing the energy loss when the exciter vibrates. The first elastic pad and the second elastic pad have the function of buffering and vibration absorption, effectively avoiding the generation of noise due to the vibration of the projection screen.

[0125] Figure 2 The rear - view structural schematic diagram of a projection screen according to an embodiment of the present application is illustrated. Figure 3 The side - view structural schematic diagram of a projection screen according to an embodiment of the present application is illustrated. As Figure 2 and Figure 3 shown, the projection screen includes: a fixed frame 21, an optical screen 22, a sound - emitting 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 the first side of the sound - emitting plate 23, one or more exciters 24 are fixed on the second side of the sound - emitting plate 23, the cover plate 25 is buckled on one or more exciters 24, the edge of the sound - emitting plate 23 can wrap the edge of the fixed frame 21, and the sound - emitting plate 23 is connected to the fixed frame 21 through a 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 be electrically connected to the projection device 1, and one or more exciters 24 can excite the sound - emitting plate 23 to vibrate to emit sound.

[0126] It should be noted that the structures of the fixed frame, the optical screen, the sound - emitting plate, one or more exciters, the cover plate, and the plurality of elastic connectors involved in the embodiment of the present application may be the same as or similar to the structures of the fixed frame, the optical screen, the sound - emitting plate, one or more exciters, the cover plate, and the plurality of elastic connectors described in the above - mentioned embodiment, and the embodiment of the present application will not elaborate on this.

[0127] In the embodiments of the present application, an optical screen is attached to the first side of the sound - emitting plate. In this way, when the projection device emits projection light onto the optical screen, the optical screen can reflect the projection light, thereby realizing the projection of the picture on the optical screen. Additionally, since one or more exciters electrically connected to the projection device are fixed on the sound - emitting plate, the projection device can drive the exciters to vibrate, and then drive the sound - emitting plate to vibrate together through the exciters, so as to emit sound through the sound - emitting plate. Since the sound - emitting plate is fixed on the fixed frame and the optical screen is attached to the sound - emitting plate, it can ensure that the sound - emitting plate and the optical screen are in the same area, thus achieving the effect that the sound emits from the picture, avoiding the situation of inconsistent picture and sound, and improving the projection effect of the projection system.

[0128] The above - mentioned are only illustrative embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc., made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A projection system, characterized in that, The projection system includes: a projection device and a projection screen, and 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 sound board, the one or more exciters are fixed to the second side of the sound board, the cover plate is buckled on the one or more exciters, the edge of the sound board can wrap the edge of the fixed frame, and the sound 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 configured to emit projection light to the optical screen, and the one or more exciters can excite the sound board to vibrate to emit sound; Wherein, the sound board includes a first skin, a second skin, and a honeycomb core board, and the honeycomb core board is adhered between the first skin and the second skin; The optical screen is attached to the side of the first skin away from the honeycomb core board, and the one or more exciters are fixed to the side of the second skin away from the honeycomb core board; The edge of the first skin and / or the second skin wraps the edge of the fixed frame, and the first skin and / or the second skin is connected to the fixed frame through the plurality of elastic connectors; A layer of polyurethane glue is provided on the side of the first skin in contact with the honeycomb core board and on the side of the second skin in contact with the honeycomb core board; 2. The projection system according to claim 1, characterized in that, The edge of the first skin and / or the second skin extends beyond the edge of the honeycomb core board, and the part of the first skin and / or the second skin that extends beyond 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; 3. The projection system according to claim 1 or 2, characterized in that, The thickness of the first skin is greater than the thickness of the second skin; 4. The projection system according to claim 1, characterized in that, A plurality of through holes corresponding to the plurality of elastic connectors are provided at the edge of the sound board, the first end of each elastic connector is connected to the corresponding through hole, and the second end of each elastic connector is connected to the fixed frame; 5. The projection system according to claim 4, characterized in that, The projection screen further includes a plurality of eyelets, the plurality of eyelets correspond to the plurality of through holes one by one, each eyelet wraps the edge of the corresponding through hole, and the first end of each elastic connector is connected to the corresponding eyelet; 6. The projection system according to claim 1, characterized in that, The optical screen is attached to the sound board through double-sided tape; 7. The projection system according to claim 1, characterized in that, The projection screen further includes one or more foam tapes corresponding to the one or more exciters, and the one or more exciters are respectively adhered to the sound board through the corresponding foam tapes; 8. The projection system according to claim 1, characterized in that, The sound board is a single piece, and the area of the sound board is less than or equal to the area of the optical screen; Alternatively, the sound board includes a plurality of sub-sound boards, the plurality of sub-sound boards are integrally connected and can independently emit sound under the action of the one or more exciters, and the total area of the plurality of sub-sound boards is less than or equal to the area of the optical screen; 9. A projection screen, characterized in that, 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 sound - generating plate, the one or more exciters are fixed to the second side of the sound - generating plate, the cover plate is buckled on the one or more exciters, the edge of the sound - generating plate can wrap the edge of the fixed frame, and the sound - generating plate is connected to the fixed frame through the plurality of elastic connecting members; The optical screen is used to receive the projection light emitted by the projection device and display the picture, the one or more exciters are used to be electrically connected to the projection device, and the one or more exciters can excite the sound - generating plate to vibrate to emit sound; Wherein, the sound - generating plate includes a first skin, a second skin and a honeycomb core board, and the honeycomb core board is adhered tightly between the first skin and the second skin; The optical screen is attached to the side of the first skin away from the honeycomb core board, and the one or more exciters are fixed to the side of the second skin away from the honeycomb core board; The edge of the first skin and / or the second skin wraps the edge of the fixed frame, and the first skin and / or the second skin is connected to the fixed frame through the plurality of elastic connecting members; A layer of polyurethane glue is provided on the side of the first skin in contact with the honeycomb core board and on the side of the second skin in contact with the honeycomb core board.

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