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 film, a carrier, a sounding board, one or more exciters, a first type of fixing member, and a second type of fixing member; the carrier is connected to the fixed frame through the first type of fixing member, and the optical film is attached to the first side of the carrier; the sounding board is located on the second side of the carrier, and the sounding board is connected to the fixed frame through the second type of fixing member; one or more exciters are fixed on the side of the sounding board away from the carrier, and one or more exciters can excite the sounding board to vibrate to emit sound; the projection device is electrically connected to one or more exciters and is used to emit light to the optical film. In the present application, the optical film and the sounding board on the carrier are fixed in the same area through the fixed frame, so as to have the effect that sound is emitted from the picture, improving the projection effect of the projection system.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 201910892996.4 and the invention title "Projection System and Projection Screen" filed on September 20, 2019, and the rest of the content is incorporated into this application by reference. Technical Field

[0002] This application relates to the field of projection technology, and particularly relates to a projection system and a projection screen. Background Art

[0003] With the continuous development of technology, projection systems are increasingly applied in 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 light, and the projection screen is fixed on a support and is used to reflect the emitted light to achieve the projection of an image.

[0004] In related technologies, taking a laser TV as an example of a projection system, a laser TV may include a projection host and a display screen. The projection host can emit light and play audio data at the same time. The display screen can receive the light emitted by the projection host and form an image after reflection.

[0005] However, when implementing the display of an image and the playback of audio data in the above manner, the projection host and the display screen are necessarily not in the same position, which easily causes the situation where the image and the sound are not unified, thereby reducing the projection effect of the projection system. Summary of the Invention

[0006] This application provides a projection system and a projection screen, which can solve the problem of non-unification of the image and the sound in related technologies. The technical solution is as follows:

[0007] On the one hand, this application provides a projection system, which includes: a projection device and a projection screen. The projection screen includes a fixed frame, an optical film, a carrier, a sounding board, one or more exciters, a first type of fixing member, and a second type of fixing member;

[0008] The carrier is connected to the fixed frame through the first type of fixing member, and the optical film is attached to the first side of the carrier;

[0009] The sounding board is located on the second side of the carrier, and the sounding board is connected to the fixed frame through the second type of fixing member;

[0010] The one or more exciters are fixed on the side of the sounding board away from the carrier, and the one or more exciters can excite the sounding board to vibrate to emit sound;

[0011] The fixed frame is used to connect with the support body. The projection device is electrically connected to the one or more exciters and is used to emit light to the optical diaphragm.

[0012] In a possible implementation, a cavity can be formed between the sounding board and the carrier body, and the distance between the sounding board and the carrier body is less than a first distance threshold, where the first distance threshold refers to the distance threshold for avoiding energy loss of the sound emitted by the sounding board in the formed cavity.

[0013] Optionally, the minimum distance between the edge of the sounding board and the fixed frame is greater than a second distance threshold, where the second distance threshold refers to the distance threshold when the sound emitted by the sounding board can be transmitted along the gap between the edge of the sounding board and the edge of the fixed frame.

[0014] Optionally, the first distance threshold is less than the thickness of the fixed frame.

[0015] Optionally, the second type of fixing member includes a plurality of tension springs. A plurality of first through holes corresponding to the plurality of tension springs are provided at the edge of the sounding board. The first end of each tension spring is connected to the corresponding first through hole, and the second end of each tension spring is connected to the fixed frame.

[0016] Optionally, the second type of fixing member further includes a plurality of eyelets. The plurality of eyelets correspond to the plurality of first through holes on the sounding board. Each eyelet wraps the edge of the corresponding first through hole, and the first end of each tension spring is connected to the corresponding eyelet.

[0017] Optionally, there are at least two first tension springs and / or at least two second tension springs among the plurality of tension springs;

[0018] For each of the at least two first tension springs, the angle between the straight line where the first tension spring is located and a side edge of the sounding board is within a reference angle range. For each of the at least two second tension springs, the straight line where the second tension spring is located is perpendicular or parallel to a side edge of the sounding board.

[0019] Optionally, the optical diaphragm is attached to the carrier body by double-sided tape.

[0020] Optionally, the projection screen further includes one or more foam tapes corresponding to the one or more exciters. The one or more exciters are respectively bonded to the sounding board through the corresponding foam tapes.

[0021] Optionally, the projection screen further includes a hanging bracket and an elastic pad;

[0022] The fixed frame is supported on the hanger, and the elastic pad is clamped between the hanger and the fixed frame, and the hanger is used to connect with the support body.

[0023] On the other hand, the present application provides a projection screen, which includes: a fixed frame, an optical film, a carrier, a sounding board, one or more exciters, a first type of fixing member, and a second type of fixing member;

[0024] The carrier is connected to the fixed frame through the first type of fixing member, the optical film is attached to the first side of the carrier, and the optical film is used to receive light emitted by a projection device;

[0025] The sounding board is located on the second side of the carrier, the sounding board is connected to the fixed frame through the second type of fixing member, and the fixed frame is used to connect with a support body;

[0026] One or more exciters are fixed on the side of the sounding board far from the carrier, and the one or more exciters can excite the sounding board to vibrate to emit sound, and the one or more exciters are used to be electrically connected to the projection device.

[0027] The beneficial effects of the technical solution provided by the present application can at least include:

[0028] In the present application, the optical film is attached to the first side of the carrier. In this way, when the projection device emits light to the optical film, the optical film can reflect the light, so as to realize the projection of the picture on the optical film. In addition, since one or more exciters electrically connected to the projection device are fixed on the sounding board, the projection device can drive the exciters to vibrate, and then drive the sounding board to vibrate together through the exciters, so as to emit sound through the sounding board. Since both the sounding board and the carrier are fixed on the fixed frame, it can be ensured that the sounding board and the optical film fixed on the carrier 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. Description of the Drawings

[0029] 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 drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic side view structure diagram of a projection system provided by an embodiment of the present application;

[0031] Figure 2It is a schematic rear view structure of a projection screen provided by an embodiment of the present application;

[0032] Figure 3 It is a schematic side view structure of a projection screen provided by an embodiment of the present application;

[0033] Figure 4 It is another schematic rear view structure of a projection screen provided by an embodiment of the present application;

[0034] Figure 5 It is another schematic rear view structure of a projection screen provided by an embodiment of the present application;

[0035] Figure 6 It is another schematic side view structure of a projection screen provided by an embodiment of the present application;

[0036] Figure 7 It is yet another schematic side view structure of a projection screen provided by an embodiment of the present application;

[0037] Figure 8 It is a schematic partial structure of a projection screen provided by an embodiment of the present application.

[0038] Reference numerals:

[0039] 1: Projection device; 2: Projection screen;

[0040] 21: Fixed frame; 22: Optical film; 23: Carrier; 24: Sound board; 25: Exciter; 26: First type of fixing member; 27: Second type of fixing member; 28: Hanger;

[0041] 211: Inner frame; 212: Outer frame; 241: First through hole; 251: Foam adhesive; 271: Tensile spring; 272: Eyelet button;

[0042] 2711: First tensile spring; 2712: Second tensile spring. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0044] Figure 1 It exemplifies a schematic side view structure of a projection system according to an embodiment of the present application, Figure 2 It exemplifies a schematic rear view structure of a projection screen according to an embodiment of the present application, Figure 3 It exemplifies a schematic side view structure of a projection screen according to an embodiment of the present application. As 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 film 22, a carrier 23, a sound board 24, one or more exciters 25, a first type of fixing member 26, and a second type of fixing member 27; the carrier 23 is connected to the fixed frame 21 through the first type of fixing member 26, and the optical film 22 is attached to the first side of the carrier 23; the sound board 24 is located on the second side of the carrier 23, and the sound board 24 is connected to the fixed frame 21 through the second type of fixing member 27; one or more exciters 25 are fixed on the side of the sound board 24 away from the carrier 23, and one or more exciters 25 can excite the sound board 24 to vibrate to emit sound; the fixed frame 21 is used to connect to a support, the projection device 1 is electrically connected to one or more exciters 25, and is used to emit light to the optical film 22.

[0045] In the embodiment of the present application, the optical film 22 is attached to the first side of the carrier 23. In this way, when the projection device 1 emits light to the optical film 22, the optical film 22 can reflect the light, so as to project an image on the optical film 22. In addition, since one or more exciters 25 electrically connected to the projection device 1 are fixed on the sound board 24, the projection device 1 can drive the exciters 25 to vibrate, and then drive the sound board 24 to vibrate together through the exciters 25, so as to emit sound through the sound board 24. Since both the sound board 24 and the carrier 23 are fixed on the fixed frame 21, it can be ensured that the sound board 24 and the optical film 22 fixed on the carrier 23 are in the same area, so that the effect of sound emitting from the image can be achieved, avoiding the situation of inconsistent image and sound, and improving the projection effect of the projection system.

[0046] Among them, the fixed frame 21 can be a frame structure, and the fixed frame 21 can be a rectangular, circular or other shaped structure with a hollow area. Of course, the fixed frame 21 can also be other non-hollow frame structures, as long as the connection between the carrier 23 and the sound board 24 can be realized.

[0047] In some embodiments, the edges of the carrier 23 and the sound board 24 are connected to the fixed frame 21, so that the central areas of the carrier 23 and the sound board 24 are located in the central area of the fixed frame 21, so as to facilitate attaching the optical film 22 to the central area of the carrier 23, and at the same time ensure that the sound emitted by the sound board 24 can be located at the center position.

[0048] Of course, the carrier 23 and the sound board 24 can also be connected to the fixed frame 21 in other ways, and the embodiments of the present application do not limit this. For example, a support frame can be provided in the central area of the fixed frame 21 to connect the carrier 23 to the first side of the support frame and connect the sound board 24 to the second side of the support frame.

[0049] In some embodiments, the optical film 22 can be attached to the first side of the carrier 23 by double-sided tape. Of course, the optical film 22 can also be attached to the first side of the carrier 23 by other means, and the embodiments of the present application do not limit this.

[0050] In some embodiments, the carrier 23 can be a soft cloth or a hard board, as long as it can carry the optical film 22 and be connected to the fixed frame 21.

[0051] When the carrier 23 is a soft cloth, in some embodiments, the first type of fixing member 26 can include a plurality of tension springs 271. In this way, when the carrier 23 and the fixed frame 21 are fixedly connected through the first type of fixing member 26, the first type of fixing member 26 can be in a stretched state, that is, the plurality of tension springs 271 are in a stretched state, so as to stretch the soft cloth by virtue of its own elastic tension, make the soft cloth open into a flat stretched state, and be tightened in the central area of the fixed frame 21.

[0052] Exemplarily, the soft cloth can be a synthetic cloth to ensure that the soft cloth has good ductility, so that it can be in a tightened state under the action of external force and will not deform.

[0053] At this time, since the soft cloth and the optical film 22 are attached to each other, when the soft cloth stretches outwards, it will also pull the optical film 22 outwards until the optical film 22 stretches to a flat state. At this time, the optical film 22 can ensure better flatness, so that the pictures and images projected on the front of the optical film 22 have a better display effect, and avoid the projection picture from being skewed and deformed.

[0054] In addition, when the first type of fixing member 26 includes a plurality of tension springs 271, it can not only play a role in tightening the soft cloth, but also play a certain role in vibration reduction and buffering when the fixed frame 21 vibrates, so as to avoid the influence of the tiny vibration on the fixed frame 21 on the optical film 22.

[0055] It should be noted that when connecting the soft cloth and the fixed frame 21, the projection screen 2 can include a plurality of first type of fixing members 26, that is, the projection screen 2 can include a plurality of tension springs 271, and a plurality of second through holes corresponding to the plurality of tension springs 271 one by one are arranged at the edge of the soft cloth. In this way, the first end of each tension spring 271 can be connected to the corresponding second through hole, and the second end of each tension spring 271 can be connected to the fixed frame 21.

[0056] Among them, the plurality of second through holes can be evenly arranged around the edge of the soft cloth. Exemplarily, when the soft cloth is rectangular, the plurality of second through holes can be distributed on two opposite sides of the soft cloth, or can be distributed on the four sides of the soft cloth.

[0057] Further, the first type of fixing member 26 may further include a plurality of eyelets. The plurality of eyelets correspond to the plurality of second through-holes one by one, and each eyelet wraps the edge of the corresponding second through-hole. In this way, the first end of the tension spring 271 can pass through the corresponding eyelet to achieve connection with the soft cloth, so as to ensure that the acting force between the tension spring 271 and the soft cloth can be evenly distributed on the eyelets, thereby avoiding damage to the soft cloth due to excessive local stress.

[0058] In some other embodiments, the first type of fixing member 26 may include a plurality of fixing screws. At this time, the carrier 23 can be tensioned and laid flat on the fixing frame 21, and then the edge of the carrier 23 can be nailed to the fixing frame 21 through the plurality of fixing screws to achieve the connection between the carrier 23 and the fixing frame 21.

[0059] It should be noted that since the plurality of fixing screws have the advantages of high fixing strength, good nailing effect, and not easy to generate shaking, the plurality of fixing screws can firmly and stably nail the soft cloth to the fixing frame 21.

[0060] When the carrier 23 is a rigid board, in some embodiments, the first type of fixing member 26 may include a plurality of fixing screws, and the plurality of fixing screws are connected to the fixing frame 21 along the edge of the rigid board.

[0061] A plurality of through-holes corresponding to the plurality of fixing screws one by one may be provided on the edge of the rigid board. For example, when the rigid board is rectangular, the plurality of through-holes may be distributed on two opposite sides of the rigid board, and of course, they may also be distributed on the four sides of the rigid board.

[0062] It should be noted that the rigid board is relatively flat and has a certain rigidity, so that the optical film 22 can be more flatly attached to the rigid board and is not easy to deform. At this time, the picture projected on the optical film 22 is not easy to appear skewed or deformed, so as to ensure that the picture has a better display effect.

[0063] It should be noted that as Figure 4 shown, the fixing frame 21 may further include an inner frame 211 and an outer frame 212. In this way, the carrier 23 can be connected to the inner frame 211 through the first type of fixing member 26, and then the outer frame 212 can be wrapped around the inner frame 211, so as to facilitate the outer frame 212 to block the first type of fixing member 26 and the connection point between the first type of fixing member 26 and the carrier 23, thereby making the projection screen 2 more beautiful.

[0064] In the embodiments of the present application, when the sounding board 24 is connected to the fixed frame 21 by the second type of fixing member 27, since the sounding board 24 is in a vibrating state during operation, in order to prevent the sounding board 24 from driving the fixed frame 21 to vibrate synchronously, thereby generating noise, the second type of fixing member 27 may at least include a plurality of elastic members, that is, the sounding board 24 and the fixed frame 21 may be elastically connected through a plurality of elastic members.

[0065] In some embodiments, the second type of fixing member 27 may include a plurality of tension springs 271. When the sounding board 24 and the fixed frame 21 are fixedly connected by the second type of fixing member 27, the second type of fixing member 27 may be in a stretched state, that is, the plurality of tension springs 271 may be in a stretched state, so as to pull the sounding board 24 tightly in the central area of the fixed frame 21 by virtue of its own elastic tension.

[0066] In addition, when the second type of fixing member 27 includes a plurality of tension springs 271, it can not only play a role in pulling the sounding board 24 tightly, but also play a certain role in vibration damping and buffering when the sounding board 24 vibrates based on the elastic deformation of the plurality of tension springs 271, so as to prevent the vibration of the sounding board 24 from driving the fixed frame 21 to vibrate, thereby reducing the noise generated by the vibration of the fixed frame 21.

[0067] It should be noted that when connecting the sounding board 24 and the fixed frame 21, a plurality of first through holes 241 corresponding to the plurality of tension springs 271 may be provided at the edge of the sounding board 24. The first end of each tension spring 271 may be connected to the corresponding first through hole 241, and the second end of each tension spring 271 may be connected to the fixed frame 21.

[0068] Among them, the plurality of first through holes 241 may be uniformly arranged along the edge of the sounding board 24. The plurality of first through holes 241 may be uniformly arranged on two opposite side edges of the sounding board 24.

[0069] Exemplarily, six first through holes 241 may be symmetrically provided on two opposite side edges of the sounding board 24 respectively. For the six first through holes 241 on any one side edge, two of the first through holes 241 may be provided at the middle position of the any one side edge, and the remaining four first through holes 241 may be evenly and symmetrically distributed at both ends of the any one side edge. The size of the first through hole 241 is set as long as the first end of the tension spring 271 can extend into the corresponding first through hole 241.

[0070] In some embodiments, there are at least two first tension springs 2711 and / or at least two second tension springs 2712 among the plurality of tension springs 271; the angle between the straight line where each first tension spring 2711 of the at least two first tension springs 2711 is located and a side edge of the sounding board 24 is within a reference angle range, and the straight line where each second tension spring 2712 of the at least two second tension springs 2712 is located is perpendicular or parallel to a side edge of the sounding board 24.

[0071] Wherein, the reference angle range may refer to an angle range greater than 0 degrees and less than 90 degrees. In this way, the first tension springs 2711 are arranged obliquely with respect to the side edges of the sounding board 24, so that the tension of the first tension springs 2711 can generate a component force in both the horizontal and vertical directions, so that the entire sounding board 24 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 sounding board 24 can be connected to the fixed frame 21 only through at least two second tension springs 2712, thereby reducing the number of second tension springs 2712.

[0072] Wherein, there is an optimal value for the angle between the straight line where the first tension spring 2711 is located and a vertical side edge of the sounding board 24, and this optimal value can be obtained through the following formula:

[0073]

[0074] In the above formula, θ is the angle between the straight line where the first tension spring 2711 is located and a vertical side edge of the sounding board 24, X is the total length of the tension spring 271 when placed vertically, Y is the total length of the tension spring 271 when placed obliquely, and L is the original length of the spring.

[0075] It should be noted that there may be a deviation of ±5° for this angle, and the plurality of tension springs 271 can be symmetrically distributed on two opposite side edges of the sounding board 24, so as to ensure the force balance of the sounding board 24 in two opposite directions, and avoid the tension springs 271 pulling the sounding board 24 crooked or causing uneven stress on a certain area of the sounding board 24, resulting in damage.

[0076] Furthermore, as Figure 5 shown, when connecting the sounding board 24 and the fixed frame 21 through the second type of fixing member 27, the second type of fixing member 27 may further include a plurality of eyelets 272, the plurality of eyelets 272 correspond to a plurality of first through holes 241 on the sounding board 24 one by one, each eyelet 272 wraps the edge of the corresponding first through hole 241, and the first end of each tension spring 271 is connected to the corresponding eyelet 272.

[0077] In this way, the first end of the tension spring 271 can pass through the corresponding eyelet button 272 to achieve connection with the sounding board 24, so as to ensure that the acting force between the tension spring 271 and the sounding board 24 can be evenly distributed on the eyelet button 272, thereby avoiding damage to the sounding board 24 due to excessive local stress.

[0078] In the embodiments of the present application, in order to ensure that the sound emitted by the sounding board 24 can have a better sounding effect, in some embodiments, such as Figure 5 shown, a cavity can be formed between the sounding board 24 and the carrier 23, and the distance between the sounding board 24 and the carrier 23 is less than the first distance threshold.

[0079] Among them, the first distance threshold refers to the distance threshold for avoiding energy loss of the sound emitted by the sounding board 24 in the formed cavity.

[0080] Since the sound transmission properties of the carrier 23 and the optical film 22 are poor, the sound emitted by the sounding board 24 can propagate along the gap between the sounding board 24 and the carrier 23. When the sound propagates along the gap between the sounding board 24 and the carrier 23, the cavity formed between the sounding board 24 and the carrier 23 determines the sounding effect of the sounding board 24.

[0081] Among them, the cavity serves as a resonance cavity, which can cause the sound to reflect back and forth between the sounding board 24 and the carrier 23. If the distance between the sounding board 24 and the carrier 23 is large, the path traveled by the sound during the reflection process is relatively long, and it is easy to cause sound loss, thereby affecting the sounding effect of the sounding board 24. Therefore, the distance between the sounding board 24 and the carrier 23 can be adjusted to ensure the sounding effect of the sounding board 24.

[0082] It should be noted that, as Figure 5 and Figure 6 shown, since the sounding board 24 is fixedly connected to the fixed frame 21 through the second type of fixing member 27, and the carrier 23 is fixedly connected to the fixed frame 21 through the first type of fixing member 26, the shape of the inner border 211 of the fixed frame 21 can be changed to adjust the distance between the first connection point of the first type of fixing member 26 and the fixed frame 21 and the second connection point of the second type of fixing member 27 and the fixed frame 21 in the thickness direction of the fixed frame 21, so as to ensure that the distance between the sounding board 24 and the carrier 23 is less than the first distance threshold.

[0083] It should also be noted that since the synthetic cloth and the sounding board 24 are respectively connected to the fixed frame 21 through the first type of fixing member 26 and the second type of fixing member 27, the distance between the synthetic cloth and the sounding board 24 cannot exceed the thickness value of the fixed frame 21. Therefore, the first distance threshold can be less than or equal to the thickness of the fixed frame 21.

[0084] Exemplarily, the first distance threshold may be 14 mm, that is, the distance between the sound - emitting plate 24 and the carrier 23 is less than 14 mm. For example, the distance between the sound - emitting plate 24 and the carrier 23 may be 4 mm, and at this time, the sound - transmission effect of the sound - emitting plate 24 is better.

[0085] In addition, since the first distance threshold may be less than the thickness of the fixed frame 21, after the sound - emitting plate 24 and the carrier 23 are fixed on the fixed frame 21, it is possible to prevent the sound - emitting plate 24 from contacting the support, thereby avoiding the influence of the support on the sound - emitting plate 24 when the sound - emitting plate 24 vibrates.

[0086] Furthermore, an elastic connecting member may be provided between the carrier 23 and the sound - emitting plate 24, and the length of the elastic connecting member may be equal to the distance between the sound - emitting plate 24 and the support, so as to define the distance between the carrier 23 and the sound - emitting plate 24 through the elastic connecting member.

[0087] In some embodiments, the minimum distance between the edge of the sound - emitting plate 24 and the fixed frame 21 is greater than a second distance threshold, and the second distance threshold refers to the distance threshold when the sound emitted by the sound - emitting plate 24 can be transmitted along the gap between the edge of the sound - emitting plate 24 and the edge of the fixed frame 21.

[0088] It should be noted that since the sound is transmitted from between the edge of the sound - emitting plate 24 and the fixed frame 21, the sound - emitting effect of the sound - emitting plate 24 can be enhanced by increasing the gap distance between the sound - emitting plate 24 and the fixed frame 21. Of course, the minimum distance between the edge of the sound - emitting plate 24 and the fixed frame 21 cannot be too large, otherwise the area of the sound - emitting plate 24 will be reduced to a large extent, directly affecting the sound - emitting area of the sound - emitting plate 24.

[0089] Exemplarily, the size of the long side or the short side of the sound - emitting plate 24 may be 12 - 18 mm smaller than the size of the long side or the short side of the inner cavity of the fixed frame 21, that is, the distance between the edge of the sound - emitting plate 24 and the fixed frame 21 may be 6 - 9 mm. At this time, it can be assumed that the second distance threshold is 10 mm to ensure that the distance between the edge of the sound - emitting plate 24 and the fixed frame 21 is less than the second distance threshold.

[0090] As can be seen from the above description, a cavity gap is formed between the sound - emitting plate 24 and the carrier 23, and there is also a gap between the edge of the sound - emitting plate 24 and the fixed frame 21. The sound can be transmitted out successively through the cavity between the sound - emitting plate 24 and the carrier 23 and the gap between the edge of the sound - emitting plate 24 and the fixed frame 21.

[0091] In some embodiments, a plurality of through holes may be provided on the sound generating plate 24, and the plurality of through holes are uniformly arranged in an array, so that sound can be transmitted through the plurality of through holes. In this way, the sound can not only be transmitted out successively through the cavity between the sound generating plate 24 and the carrier 23 and the gap between the edge of the sound generating plate 24 and the fixed frame 21, but also be directly transmitted out from the plurality of through holes on the sound generating plate 24. At this time, the sound has multiple transmission channels, thereby enhancing the sound generating effect of the sound generating plate 24.

[0092] In the embodiments of the present application, one or more exciters 25 may be elastically connected to the sound generating plate 24. In some embodiments, the projection screen 2 may further include one or more foam adhesives 251 (not shown in the figure) corresponding to the one or more exciters 25, and the one or more exciters 25 are respectively bonded to the sound generating plate 24 through the corresponding foam adhesives 251.

[0093] When the exciter 25 is working, it needs to reciprocate in the normal direction of the sound generating plate 24. At the same time, when the exciter 25 approaches the sound generating plate 24, it can transmit sound waves to the sound generating plate 24, causing the entire plate surface of the sound generating plate 24 to vibrate together. Since the foam adhesive 251 has a certain elasticity, it can ensure that while bonding the exciter 25, the exciter 25 can reciprocate in the normal direction of the sound generating plate 24.

[0094] In the embodiments of the present application, as Figure 6 shown, the projection screen 2 further includes a hanging bracket 28 and an elastic pad (not shown in the figure). The fixed frame 21 is supported on the hanging bracket 28, and the elastic pad is clamped between the hanging bracket 28 and the fixed frame 21. The hanging bracket 28 is used to connect to the support body.

[0095] In this way, through the support of the fixed frame 21 by the hanging bracket 28 and the connection between the hanging bracket 28 and the support body, the fixed frame 21 can be supported on the support body, and further the projection screen 2 can be supported on the support body. In addition, the elastic pad clamped between the hanging bracket 28 and the fixed frame 21 can effectively prevent abnormal noises caused by the vibration of the fixed frame 21, and can avoid friction caused by rigid contact between the hanging bracket 28 and the fixed frame 21.

[0096] It should be noted that, in some embodiments, the hanging bracket 28 may be a bent hanging bracket 28 with three bends. The hanging bracket 28 includes a first section, a second section and a connecting section. The first section is vertically connected to the first end of the connecting section, the second section is vertically connected to the second end of the connecting section, and the first section and the second section face both sides of the connecting section respectively.

[0097] In this way, when the fixing frame 21 is supported by the hanger 28, the first section of the hanger 28 can extend into the fixing frame 21 along the gap between the fixing frame 21 and the sound - emitting plate 24, with the end of the first section away from the connecting section facing upward and the end of the second section away from the connecting section facing downward. After the second section of the hanger 28 is connected to the support body, the connecting section of the hanger 28 can support the fixing frame 21, so as to realize the support of the support body for the fixing frame 21.

[0098] In this way, since there is a connecting section perpendicular to the first section and the second section, the distance between the second section of the hanger 28 and the sound - emitting plate 24 is limited, that is, the distance between the sound - emitting plate 24 and the support body is limited, thus avoiding the contact and friction between the hanger 28 and the support body and the sound - emitting plate 24, and avoiding the generation of abnormal noises.

[0099] Correspondingly, the elastic pad can be an "L" - shaped two - section bending elastic pad. The first section of the elastic pad is closely attached to the first section of the hanger 28, and the second section of the elastic pad is closely attached to the connecting section of the hanger 28. In this way, the elastic pad can be clamped between the hanger 28 and the fixing frame 21.

[0100] Exemplarily, the elastic pad can be made of foam material to ensure that the elastic pad has vibration - damping and buffering functions.

[0101] In summary, the projection screen 2 provided with the sound - emitting plate 24 has dual physical functions of picture display and sound playback. The projection system no longer needs to use traditional speakers. This way of combining the sound - emitting plate 24 and the optical film 22 can achieve the effect of EVS (Excited Voicing Screen). And multiple exciters 25 fixed on the sound - emitting plate 24 can excite the sound - emitting plate 24 at different positions, so that the sound - emitting plate 24 can emit stereo bending sound waves.

[0102] It should be noted that the way the actuator 25 drives the sound - generating plate 24 to generate sound has excellent performance in many aspects. In terms of timbre, the amplitude of the sound - generating plate 24 is a small amplitude at the micron level, with low distortion and excellent transient response. The sound restoration degree is high, and it has appropriate strength, high clarity, and good spatial depth. Therefore, the sound - generating plate 24 can transmit more authentic musical instrument sounds or human voices, etc. In terms of sound propagation, the sound - generating plate 24 is a surface sound source, with a uniform sound field, and can generate 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 - generating plate 24 is extremely wide, so that the listeners closest to the screen will not be affected by the impact of the near - field sound pressure and will not feel overly noisy. When the listeners are at a distance, they can still hear clearly. The sound quality is the same when listening from any 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 they hear, nor will there be a feeling of volume reduction or sound field contraction. Even when the screen is blocked to a certain extent, it will not have a significant impact on the sound quality.

[0103] Therefore, when the sound emitted by the sound - generating plate 24 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.

[0104] In the embodiment of the present application, by attaching the optical film to the first side of the carrier, when the projection device emits light to the optical film, the optical film can reflect the light, thereby realizing the projection of the picture on the optical film. In addition, since one or more actuators electrically connected to the projection device are fixed on the sound - generating plate, the projection device can drive the actuators to vibrate, and then drive the sound - generating plate to vibrate together through the actuators, so as to generate sound through the sound - generating plate. Since both the sound - generating plate and the carrier are fixed on the fixed frame, it can be ensured that the sound - generating plate and the optical film fixed on the carrier are in the same area, so as to achieve 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. There is a certain interval between the sound - generating plate and the carrier, and there is also a certain distance between the sound - generating plate and the fixed frame, so that the sound generated by the sound - generating plate can be transmitted more completely. The first - type fixing parts and the second - type fixing parts both have the functions of fastening and vibration reduction, which can make the projection screen present a clearer picture and reduce the generation of noise.

[0105] 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 3As shown in the figure, the projection screen includes: a fixed frame 21, an optical film 22, a carrier 23, a sounding board 24, one or more exciters 25, a first type of fixing member 26, and a second type of fixing member 27; the carrier 23 is connected to the fixed frame 21 through the first type of fixing member 26, the optical film 22 is attached to the first side of the carrier 23, and the optical film 22 is used to receive the light emitted by the projection device 1; the sounding board 24 is located on the second side of the carrier 23, the sounding board 24 is connected to the fixed frame 21 through the second type of fixing member 27, and the fixed frame 21 is used to be connected to the support; one or more exciters 25 are fixed on the side of the sounding board 24 away from the carrier 23, one or more exciters 25 can excite the sounding board 24 to vibrate to emit sound, and one or more exciters 25 are used to be electrically connected to the projection device 1.

[0106] It should be noted that the structures of the fixed frame, the optical film, the carrier, the sounding board, one or more exciters, the first type of fixing member, and the second type of fixing member involved in the embodiments of the present application may be the same as or similar to the structures of the fixed frame, the optical film, the carrier, the sounding board, one or more exciters, the first type of fixing member, and the second type of fixing member described in the above embodiments, and the embodiments of the present application will not be elaborated herein.

[0107] In the embodiments of the present application, by attaching the optical film to the first side of the carrier, in this way, when the projection device emits light to the optical film, the optical film can reflect the light, so as to realize the projection of the picture on the optical film. In addition, since one or more exciters electrically connected to the projection device are fixed on the sounding board, in this way, the projection device can drive the exciters to vibrate, so as to drive the sounding board to vibrate together through the exciters, so as to emit sound through the sounding board. Since both the sounding board and the carrier are fixed on the fixed frame, it can be ensured that the sounding board and the optical film fixed on the carrier 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.

[0108] The above 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 in the protection scope of the present application.

Claims

1. A projection system, characterized in that, The projection system includes: a projection device (1) and a projection screen (2), and the projection screen (2) includes a fixed frame (21), an optical film (22), a carrier (23), a sounding board (24), one or more exciters (25), a first type of fixing member (26), and a second type of fixing member (27); The carrier (23) is connected to the fixed frame (21) through the first type of fixing member (26), and the optical film (22) is attached to the first side of the carrier (23); The sounding board (24) is located on the second side of the carrier (23), and the edge of the sounding board (24) is connected to the fixed frame (21) through the second type of fixing member (27); The one or more exciters (25) are fixed on the side of the sounding board (24) away from the carrier (23), and the one or more exciters (25) can excite the sounding board (24) to vibrate to emit sound; The fixed frame (21) is used to connect to a support, the projection device (1) is electrically connected to the one or more exciters (25), and is used to emit light to the optical film (22); Wherein, a cavity can be formed between the sounding board (24) and the carrier (23), and the distance between the sounding board (24) and the carrier (23) is less than a first distance threshold, and the first distance threshold refers to the distance threshold for avoiding energy loss of the sound emitted by the sounding board (24) in the formed cavity.

2. The projection system according to claim 1, wherein The minimum distance between the edge of the sounding board (24) and the fixed frame (21) is greater than a second distance threshold, and the second distance threshold refers to the distance threshold when the sound emitted by the sounding board (24) can be transmitted along the gap between the edge of the sounding board (24) and the edge of the fixed frame (21).

3. The projection system according to claim 1, wherein The first distance threshold is less than the thickness of the fixed frame (21).

4. The projection system according to claim 1, wherein The second type of fixing member (27) includes a plurality of tension springs (271), and a plurality of first through holes (241) corresponding to the plurality of tension springs (271) are provided on the edge of the sounding board (24), and the first end of each tension spring (271) is connected to the corresponding first through hole (241), and the second end of each tension spring (271) is connected to the fixed frame (21).

5. The projection system according to claim 4, wherein The second type of fixing member (27) further includes a plurality of eyelets (272), and the plurality of eyelets (272) correspond to the plurality of first through holes (241) on the sounding board (24) one by one, each eyelet (272) wraps the edge of the corresponding first through hole (241), and the first end of each tension spring (271) is connected to the corresponding eyelet (272).

6. The projection system according to claim 4, wherein There are at least two first tension springs (2711) and / or at least two second tension springs (2712) among the plurality of tension springs (271); The angle between the straight line where each of the at least two first tension springs (2711) is located and a side edge of the sound - generating plate (24) is within a reference angle range, and the straight line where each of the at least two second tension springs (2712) is located is perpendicular or parallel to a side edge of the sound - generating plate (24).

7. The projection system according to claim 1, wherein The optical film (22) is attached to the carrier (23) by double - sided tape.

8. The projection system according to claim 1, characterized in that, The projection screen (2) further includes one or more foam adhesives (251) corresponding to the one or more exciters (25), and the one or more exciters (25) are respectively bonded to the sound - generating plate (24) through the corresponding foam adhesives (251).

9. The projection system according to claim 1, wherein The projection screen (2) further includes a hanging bracket (28) and an elastic pad; The fixed frame (21) is supported on the hanging bracket (28), and the elastic pad is clamped between the hanging bracket (28) and the fixed frame (21), and the hanging bracket (28) is used to connect with the support body.

10. A projection screen, characterized in that, The projection screen includes: a fixed frame (21), an optical film (22), a carrier (23), a sound - generating plate (24), one or more exciters (25), a first type of fixing member (26), and a second type of fixing member (27); The carrier (23) is connected to the fixed frame (21) through the first type of fixing member (26), the optical film (22) is attached to the first side of the carrier (23), and the optical film (22) is used to receive light emitted by the projection device (1). The sound - generating plate (24) is located on the second side of the carrier (23), and the edge of the sound - generating plate (24) is connected to the fixed frame (21) through the second type of fixing member (27), and the fixed frame (21) is used to connect with the support body; The one or more exciters (25) are fixed on the side of the sound - generating plate (24) away from the carrier (23), the one or more exciters (25) can excite the sound - generating plate (24) to vibrate to emit sound, and the one or more exciters (25) are used to be electrically connected to the projection device (1); Wherein, a cavity can be formed between the sound - generating plate (24) and the carrier (23), and the distance between the sound - generating plate (24) and the carrier (23) is less than a first distance threshold, and the first distance threshold is a distance threshold for avoiding energy loss of the sound emitted by the sound - generating plate (24) in the formed cavity.

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