CN211086905U

CN211086905U - Projection system and projection screen

Info

Publication number: CN211086905U
Application number: CN201921786736.0U
Authority: CN
Inventors: 张健; 杨长明; 李建军
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-07-24
Anticipated expiration: 2029-10-23

Abstract

The utility model discloses a projection system and projection screen belongs to projection technical field. The projection system includes: the projection screen comprises a fixed frame, an optical screen, a sound generating plate, one or more exciters, a cover plate and a plurality of elastic connecting pieces; the optical screen is attached to the first side of the sound-emitting plate, the one or more exciters are fixed to the second side of the sound-emitting plate, the cover plate is buckled on the one or more exciters, the edge of the sound-emitting plate can wrap the edge of the fixed frame, and the sound-emitting plate is connected with the fixed frame through the elastic connecting pieces; the projection device is electrically connected to the one or more actuators and is configured to emit projection light to the optical screen, and the one or more actuators are capable of exciting the sound-emitting panel to vibrate to emit sound. The utility model discloses a fixed frame fixes optical screen and sound production board in same region to can have the effect that sound sent from the picture, improve projection system's projection effect.

Description

Projection system and projection screen

Technical Field

The utility model relates to a projection technology field, in particular to projection system and projection screen.

Background

With the continuous development of science and technology, projection systems are increasingly applied to the work and life of people. Currently, projection systems mainly include a projection device and a projection screen. The projection device is mainly used for emitting projection light, the projection screen is fixed on the supporting body and used for reflecting the emitted projection light so as to realize projection of pictures.

In the related art, taking a projection system as an example of a laser television, the laser television may include a projection host and an optical screen, where the projection host may emit projection light and play audio data, and the optical screen may receive the projection light emitted by the projection host and form a picture after reflection.

However, when the display of the picture and the playing of the audio data are realized through the above manner, the projection host and the optical screen are necessarily not at the same position, so that the condition that the picture and the sound are not uniform is easily caused, and the projection effect of the projection system is further reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a projection system and projection screen can solve the problem that picture and sound are nonuniform among the correlation technique. The technical scheme is as follows:

in one aspect, a projection system, the projection system comprising: the projection screen comprises a fixed frame, an optical screen, a sound generating plate, one or more exciters, a cover plate and a plurality of elastic connecting pieces;

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

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

In one possible implementation, the sound board comprises a first skin, a second skin and a honeycomb core plate, wherein the honeycomb core plate is tightly adhered between the first skin and the second skin;

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

the edges of the first skin and/or the second skin are wrapped on the edges of the fixed frame, and the first skin and/or the second skin are connected with the fixed frame through the elastic connectors.

Optionally, the edge of the first skin and/or the second skin extends out of the edge of the honeycomb core plate, and the part of the first skin and/or the second skin extending out of the edge of the honeycomb core plate wraps the edge of the fixed frame and is connected with the fixed frame through the plurality of elastic connecting pieces.

Optionally, the sound board comprises a first skin, a second skin, a honeycomb core board and a soft connecting piece;

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

the soft connecting piece is a clip structure, the soft connecting piece surrounds the edge of the second skin, the inner edge of the soft connecting piece is fixedly connected with the second skin, and the outer edge of the soft connecting piece wraps the fixed frame and is connected with the fixed frame through the elastic connecting pieces.

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

Optionally, the edge of the sound board is provided with a plurality of through holes corresponding to the plurality of elastic connecting pieces one to one, a first end of each elastic connecting piece is connected with the corresponding through hole, and a second end of each elastic connecting piece is connected with the fixed frame.

Optionally, the projection screen further includes a plurality of eyelet buttons, the eyelet buttons correspond to the through holes one to one, each eyelet button wraps the edge of the corresponding through hole, and the first end of each elastic connecting member is connected to the corresponding eyelet button.

Optionally, the optical screen is attached to the sound board by a double-sided adhesive tape.

Optionally, the projection screen further includes one or more foam adhesives in one-to-one correspondence with the one or more exciters, and the one or more exciters are respectively bonded to the sound generating plate through the corresponding foam adhesives.

Optionally, the sound-emitting plate is a whole plate, and the area of the sound-emitting plate is smaller than or equal to the area of the optical screen;

or the sound-emitting plate comprises a plurality of sub sound-emitting plates which 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-emitting plates is smaller than or equal to the area of the optical screen.

In another aspect, a projection screen, the projection screen comprising: a fixed frame, an optical screen, a sound board, one or more exciters, a cover plate and a plurality of elastic connecting pieces;

the optical screen is used for receiving the projection light emitted by the projection equipment and displaying pictures, the one or more exciters are electrically connected with the projection equipment, and the one or more exciters can excite the sound-emitting plate to vibrate to emit sound.

The utility model provides a technical scheme's beneficial effect can include at least:

the optical screen is attached to the first side of the sound-emitting plate, so that when the projection equipment emits projection light to the optical screen, the optical screen can reflect the projection light, and projection of pictures is achieved on the optical screen. In addition, one or more exciters electrically connected with the projection equipment are fixed on the sound-emitting board, so that the projection equipment can drive the exciters to vibrate, and the sound-emitting board is driven by the exciters to vibrate together so as to emit sound through the sound-emitting board. Because the sound board is fixed on the fixed frame, the optical screen is attached to the sound board, so that the sound board and the optical screen can be ensured to be in the same area, the effect of sound emitted from the picture can be achieved, the condition that the picture and the sound are not uniform is avoided, and the projection effect of the projection system is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic side view of a projection system according to an embodiment of the present invention;

fig. 2 is a schematic rear view of a projection screen according to an embodiment of the present invention;

fig. 3 is a schematic side view of a projection screen according to an embodiment of the present invention;

fig. 4 is a schematic partial structural view of a first skin according to an embodiment of the present invention;

fig. 5 is a partial schematic structural view of another first skin provided in an embodiment of the present invention;

fig. 6 is a schematic partial structure diagram of a projection screen according to an embodiment of the present invention;

fig. 7 is a schematic rear view of another projection screen according to an embodiment of the present invention.

Reference numerals:

1: a projection device; 2: projection screen

21: a fixed frame; 22: an optical screen; 23: a sound board; 24: an exciter; 25: a cover plate; 26: an elastic connecting member; 27: a corn button;

211: an inner frame; 212: an outer frame; 231: a first skin; 232: a second skin; 233: a honeycomb core board; 234: a soft connecting piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 illustrates the side view structure schematic diagram of a projection system of the embodiment of the present invention, fig. 2 illustrates the rear view structure schematic diagram of a projection screen of the embodiment of the present invention, fig. 3 illustrates the side view structure schematic diagram of a projection screen of the embodiment of the present invention. As shown in fig. 1, 2 and 3, the projection system includes: projection device 1 and projection screen 2, projection screen 2 comprising a fixed frame 21, an optical screen 22, a sound board 23, one or more actuators 24, a cover plate 25 (not shown in the figures) and a plurality of elastic connectors 26; the optical screen 22 is attached to the first side of the sound-emitting plate 23, the one or more exciters 24 are fixed to the second side of the sound-emitting plate 23, the cover plate 25 is fastened 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 with the fixed frame 21 through a plurality of elastic connecting pieces 26; the projection device 1 is electrically connected to one or more actuators 24 and is adapted to emit projection light to the optical screen 22, the one or more actuators 24 being capable of exciting the sound-emitting panel 23 to vibrate to emit sound.

The embodiment of the utility model provides an in, laminate optical screen 22 in the first side of sound board 23, when projection equipment 1 sends projection light to optical screen 22 like this, optical screen 22 can reflect this projection light to realize the projection of picture on optical screen 22. In addition, since the sound-emitting panel 23 is fixed with one or more exciters 24 electrically connected to the projection apparatus 1, the projection apparatus 1 can drive the exciters 24 to vibrate, so that the sound-emitting panel 23 is driven by the exciters 24 to vibrate together to emit sound through the sound-emitting panel 23. Because the sound board 23 is fixed on the fixed frame 21, and the optical screen 22 is attached to the sound board 23, the optical screen 22 of the sound board 23 can be ensured to be in the same area, so that the effect of emitting sound from the picture can be achieved, the condition that the picture and the sound are not uniform is avoided, and the projection effect of the projection system is improved.

The optical screen 22 may include an optical film, and certainly may also include other structures as long as the display of the picture can be achieved, which is not limited by the embodiment of the present invention.

Wherein the fixing frame 21 may be a frame type structure, and the fixing frame 21 may be a structure having a rectangular shape, a circular shape or other shapes with a hollow area. Of course, the fixing frame 21 may have other non-hollow frame structure as long as the connection with the sound-emitting panel 23 can be achieved. In addition, the fixing frame 21 may be used to connect with a support to realize fixed support of the whole projection screen 2, and the support may be a fixing bracket or a wall, so long as fixed support of the projection screen 2 can be realized.

It should be noted that the fixing frame 21 may further include an inner frame 211 and an outer frame 212, so that the sound-emitting panel 23 may be connected to the inner frame 211 through the elastic connection member 26, and then the outer frame 212 may be wrapped on the inner frame 211, so that the edge of the sound-emitting panel 23 may be shielded by the outer frame 212, thereby making the projection screen 2 more beautiful.

In some embodiments, the edges of the sound-emitting panel 23 are connected to the fixing frame 21 such that the central region of the sound-emitting panel 23 is located at the central region of the fixing frame 21, so that the optical screen 22 can be attached to the central region of the sound-emitting panel 23 while ensuring that the sound emitted from the sound-emitting panel 23 can be located at the right center.

In some embodiments, the sound-emitting panel 23 may be a unitary panel, the area of the sound-emitting panel 23 being less than or equal to the area of the optical screen 22; alternatively, the sound-emitting panel 23 may include a plurality of sub-sound-emitting panels 23, the plurality of sub-sound-emitting panels 23 are integrally connected and can independently emit sound under the action of one or more actuators 24, and the total area of the plurality of sub-sound-emitting panels 23 is smaller than or equal to the area of the optical screen 22.

Wherein, when the sound board 23 is the polylith sub sound board, can connect polylith sub sound board integral type to behind the sound board 23 of obtaining, laminate optical screen 22 on sound board 23 again.

In some embodiments, the sound board 23 may include a first skin 231, a second skin 232, and a honeycomb core plate 233, the honeycomb core plate 233 being adhered between the first skin 231 and the second skin 232; the optical screen 22 is attached to the first skin 231 on the side away from the honeycomb core 233, and the one or more exciters 24 are fixed to the second skin 232 on the side away from the honeycomb core 233; the edges of the first skin 231 and/or the second skin 232 wrap around the edges of the fixed frame 21, and the first skin 231 and/or the second skin 232 are connected with the fixed frame 21 through a plurality of elastic connectors 26.

Both the side of the first skin 231, which is in contact with the honeycomb core plate 233, and the side of the second skin 232, which is in contact with the honeycomb core plate 233, may be provided with a layer of PU (polyurethane) glue, and the PU glue may adhere the first skin 231 and the second skin 232 to the honeycomb core plate 233, and may soften the first skin 231 and the second skin 232, so that the first skin 231 and the second skin 232 may bear the tensile force. After the first skin 231 is bonded to the honeycomb core plate 233, the honeycomb core plate 233 can be indirectly connected to the optical screen 22 by bonding the first skin 231 to the optical screen 22.

Wherein, the edge of the first skin 231 and/or the second skin 232 may extend out of the edge of the honeycomb core plate 233, and the portion of the first skin 231 and/or the second skin 232 extending out of the edge of the honeycomb core plate 233 wraps the edge of the fixed frame 21 and is connected with the fixed frame 21 through a plurality of elastic connectors 26.

When the first skin 231 is connected with the fixed frame 21 through the elastic connecting piece 26, a circle of the first skin 231 can be cut around the edge of the second skin 232, and then the honeycomb core plate 233 corresponding to the circle of the first skin is removed, so as to ensure that the edge of the first skin 231 extends out of the edge of the honeycomb core plate 233, and further, the part of the first skin 231 extending out of the edge of the honeycomb core plate 233 can be connected with the fixed frame 21 through the elastic connecting piece 26.

Further, in connecting the portion of the first skin 231 extending out of the edge of the honeycomb core plate 233 to the fixing frame 21, the portion of the first skin 231 extending out of the honeycomb core plate 233 is located on the first side of the fixing frame 21 and extends out of the edge of the fixing frame 21, and then the portion of the first skin 231 extending out of the honeycomb core plate 233 is folded toward the second side of the fixing frame 21 to wrap the edge of the first skin 231 on the fixing frame 21, and then the edge of the first skin 231 is connected to the fixing frame 21 by the elastic connection member 26.

It should be noted that in order to facilitate the folding of the first skin 231 at the four corners when folding the distribution of the first skin 231 extending out of the honeycomb core plate 233, in some embodiments, as shown in fig. 4 and 5, the four corners of the first skin 231 may be cut off.

It should be further noted that, when the second skin 232 is connected with the fixed frame 21 through the elastic connecting member 26, as shown in fig. 3, the second skin 232 may be connected with the fixed frame 21 in a manner similar to that described above, and the embodiment of the present invention is not repeated herein.

Wherein, when first covering 231 and second covering 232 pass through elastic connection spare 26 and are connected with fixed frame 21, can cut out the round around the edge of honeycomb core plate 233, later can adopt and realize being connected of first covering 231 and second covering 232 with fixed frame 21 simultaneously with above-mentioned similar mode, the embodiment of the utility model discloses no longer describe herein.

In other embodiments, as shown in fig. 6, the sound-emitting panel 23 comprises a first skin 231, a second skin 232, a honeycomb core 233, and a flexible connector 234, the honeycomb core 233 is adhered between the first skin 231 and the second skin 232, the optical screen 22 is attached to the first skin 231 on the side away from the honeycomb core 233, and the one or more exciters 24 are fixed to the second skin 232 on the side away from the honeycomb core 233; the soft connecting piece 234 is of a clip structure, the soft connecting piece 234 surrounds the edge of the second skin 232, the inner edge of the soft connecting piece 234 is fixedly connected with the second skin 232, and the outer edge of the soft connecting piece 234 wraps the fixed frame 21 and is connected with the fixed frame 21 through a plurality of elastic connecting pieces 26.

The soft connecting member 234 may be a soft cloth. Illustratively, the soft connecting member 234 may be a synthetic cloth to ensure that the soft cloth has good ductility so that it can be in a taut state by an external force without deformation.

When the soft connecting member 234 is made of soft cloth, the connection between the soft connecting member 234 and the fixed frame 21 may be achieved by the connection between the first skin 231 and the fixed frame 21 as described above. It should be noted that, when the soft connecting member 234 is connected with the second skin 232, the soft connecting member may be bonded by a double-sided adhesive tape or the like, or may be connected by other methods.

Note that the soft connecting member 234 may be fixedly connected to the first skin 231, and the connection manner may be the connection manner of the soft connecting member 234 and the second skin 232 as described above, and then, the soft connecting member 234 is connected to the fixed frame 21. When the flexible connecting member 234 is connected to the fixed frame 21, the edges of the first skin 231, the second skin 232, and the honeycomb core plate 233 may not be cut, as long as the connection of the sound-emitting panel 23 and the flexible connecting member 234 can be achieved.

For both of the above embodiments, the first skin 231, the second skin 232, and the honeycomb core panel 233 are identical or similar in structure and style. Accordingly, the first skin 231, the second skin 232, and the honeycomb core plate 233 of either of the above two embodiments will be described next.

The first skin 231 and the second skin 232 may be fiber skins, and since the extending direction of the fibers may be a single direction or an interlaced direction, and the tensile strength of the fibers is high, when the first skin 231 and/or the second skin 232 are connected to the fixing frame 21 through the elastic connection member 26, the first skin 231 and/or the second skin 232 may be tensioned by the elastic connection member 26 and may not be easily damaged.

It should be noted that the material of the first skin 231 and the second skin 232 may be glass fiber, carbon fiber, or glass-carbon hybrid fiber, and of course, the first skin 231 and the second skin 232 may also be plastic or lightweight aluminum, etc. The thicknesses of the first skin 231 and the second skin 232 can be within a range of 0.1-0.5 mm, further, the thicknesses of the first skin 231 and the second skin 232 can be within a range of 0.18-0.36 mm, and the thicknesses of the first skin 231 and the second skin 232 can be different as long as the thicknesses are within the above range.

The honeycomb core plate 233 is a honeycomb core plate with a cross section formed by closely arranging a plurality of hollow hexagonal honeycomb cells, each hexagonal honeycomb cell in the honeycomb core plate 233 includes at least one pair of parallel honeycomb walls, and there is a pair of parallel honeycomb walls vertical to the horizontal plane. For example, the material of the honeycomb core plate 233 may be paper, aramid, metal or other composite material.

The distance between a pair of parallel honeycomb walls is in the range of 3-10 mm, and the ratio of the distance between the pair of parallel honeycomb walls to the distance between two opposite vertexes on the cross section of the honeycomb is less than 0.58.

It should be further noted that the sound-emitting panel 23 may only include the honeycomb core plate 233, or only include the honeycomb core plate 233 and the first skin 231, or only include the honeycomb core plate 233 and the second skin 232, as long as the optical screen 22 and the exciter 24 can be fixed on the sound-emitting panel 23, and the honeycomb core plate 233 is fixedly connected with the fixing frame 21, which is not limited by the embodiment of the present invention.

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

It should be noted that, because the optical screen 22 is made of a translucent material, the structure of the sound-emitting plate 23 can be easily observed through the optical screen 22, and if the surface of the sound-emitting plate 23 is not flat enough, the pits and the protrusions of the sound-emitting plate 23 can be easily observed, and in addition, the unevenness of the surface of the sound-emitting plate 23 can also make the optical screen 22 not flat enough, in some embodiments, the thickness of the first skin 231 can be made larger than that of the second skin 232, so that the unevenness of the honeycomb core plate 233 can be displayed on the side where the second skin 232 is located by pressing the first skin 231 against the honeycomb core plate 233, so as to improve the flatness of the first skin 231, and further improve the flatness of the optical screen 22.

In some embodiments, as shown in fig. 7, the edge of the sound-emitting panel 23 may be provided with a plurality of through holes corresponding one-to-one to the plurality of elastic connection members 26, a first end of each elastic connection member 26 being connected to the corresponding through hole, and a second end of each elastic connection member 26 being connected to the fixed frame 21. Illustratively, the plurality of resilient connectors 26 may be a plurality of tension springs.

It should be noted that, for the size of each through hole, it is only necessary to ensure that the first end of the elastic connecting member 26 can extend into the corresponding through hole. Elastic connection member 26 not only can play the effect of taut sound board 23, can also play certain damping and cushioning effect when sound board 23 vibrates based on the elastic deformation that a plurality of elastic connection member 26 have to avoid sound board 23's vibration to drive fixed frame 21 to take place the vibration, thereby can reduce fixed frame 21 because of the noise that the vibration produced.

In some embodiments, the plurality of through holes may be disposed on the edge of first skin 231 and/or second skin 232, or on the outer edge of the soft cloth, but the plurality of through holes may be disposed only on two opposite sides of first skin 231 and/or second skin 232, or on two opposite sides of the soft cloth.

For example, six through holes may be disposed on two opposite sides of the first skin 231 and/or the second skin 232, respectively, or six through holes may be disposed on two opposite sides of the soft cloth, respectively. Wherein, two through-holes can set up the intermediate position at a corresponding side, and the setting that four remaining through-holes can be symmetrical is at the both ends of a corresponding side.

In some embodiments, there are at least two first bullet-shaped connectors and/or at least two second bullet-shaped connectors in the plurality of elastic connectors 26; the included angle between the straight line of each of the at least two first bullet-shaped connecting pieces and one side edge of the sound board 23 is within the reference included angle range, and the straight line of each of the at least two second bullet-shaped connecting pieces is perpendicular to or parallel to one side edge of the sound board 23.

The reference angle range may refer to an angle range greater than 0 degrees and less than 90 degrees. Thus, the first sub-elastic connecting members are obliquely arranged relative to the side edges of the sound-emitting panel 23, so that the pulling force of the first sub-elastic connecting members can generate a component force in the horizontal and vertical directions, respectively, and the whole sound-emitting panel 23 can be stressed in both the vertical and horizontal directions, and thus, the upper side and the lower side of the sound-emitting panel 23 can be connected with the fixed frame 21 only through at least two second sub-elastic connecting members, or the left side and the right side of the sound-emitting panel 23 are connected with the fixed frame 21, and the number of the second sub-elastic connecting members can be reduced.

Wherein, there is an optimum value for the angle between the straight line of the first bullet-shaped connecting piece and the vertical side of the sound board 23, and the optimum value can be obtained by the following formula:

in the above formula, θ is the angle between the straight line of the first bullet-shaped connecting member and the vertical side of the sound board 23, X is the total length of the elastic connecting member 26 when vertically placed, Y is the total length of the elastic connecting member 26 when obliquely placed, and L is the original length of the spring.

It should be noted that the deviation of the angle may be ± 5 °, and the elastic connection members 26 may be symmetrically distributed on two opposite sides of the sound board 23, so as to ensure that the sound board 23 is stressed in two opposite directions, and avoid the elastic connection members 26 pulling the sound board 23 askew or causing unbalanced stress in a certain area of the sound board 23, thereby causing a damage phenomenon.

Further, when the sound board 23 and the fixing frame 21 are connected by the elastic connecting member 26, the projection screen 2 may further include a plurality of eyelet 27, the eyelet 27 corresponds to the through holes on the sound board 23 one by one, each eyelet 27 wraps the edge of the corresponding through hole, and the first end of each elastic connecting member 26 is connected to the corresponding eyelet 27.

In this way, the first end of the elastic connecting member 26 can pass through the corresponding eyelet 27 to be connected with the sound-emitting plate 23, so as to ensure that the acting force between the elastic connecting member 26 and the sound-emitting plate 23 can be uniformly distributed on the eyelet 27, thereby preventing the sound-emitting plate 23 from being damaged due to large local stress.

In the present embodiment, one or more exciters 24 may be elastically connected to the sound board 23. In this case, the projection screen 2 may further include one or more foam adhesives in one-to-one correspondence with the one or more exciters 24, and the one or more exciters 24 are respectively attached to the sound-emitting panel 23 by the corresponding foam adhesives.

When the exciter 24 works, the exciter 24 needs to do reciprocating motion in the normal direction of the sound-emitting plate 23, meanwhile, when the exciter 24 approaches the sound-emitting plate 23, sound waves can be transmitted to the sound-emitting plate 23, and in addition, the whole plate surface of the sound-emitting plate 23 vibrates together. Due to the certain elasticity of the foam rubber, the exciter 24 can be ensured to be bonded and the exciter 24 can reciprocate in the normal direction of the sound-emitting plate 23.

In some embodiments, projection screen 2 may also include one or more elastic bodies in one-to-one correspondence with one or more actuators 24. Each elastomer is fixed to a corresponding exciter 24 and the cover plate 25 is fastened to one or more elastomers and is fixedly connected to the sound board 23 and/or the fixed frame 21.

It should be noted that since the cover plate 25 is fastened to the one or more elastic bodies, the amplitude of each exciter 24 in the direction away from the sound-emitting plate 23 can be reduced by the cover plate 25, thereby reducing the loss of energy when the exciter 24 vibrates. In addition, each elastic body may prevent a hard contact between the corresponding exciter 24 and the cover plate 25, thereby preventing the generation of noise.

In some embodiments, there may be at least one looped foam in the one or more resilient bodies, each looped foam being fitted over a corresponding actuator 24 and glued to the corresponding actuator 24.

It should be noted that, since the ring-shaped foam may be elastically deformed between the exciter 24 and the cover plate 25 due to the pressing, the ring-shaped foam glued on the exciter 24 may prevent the hard contact between the exciter 24 and the cover plate 25, and avoid the generation of unnecessary friction and noise. Since the annular foam has a certain thickness when the exciter 24 vibrates, when the exciter 24 makes indirect contact with the cover plate 25, the amplitude of the exciter 24 can be also limited by the annular foam, thereby reducing the energy loss of the exciter 24 in the direction away from the sound-emitting panel 23.

For example, the ring-shaped foam may be adhered to the exciter 24 by a double-sided adhesive tape, or may be adhered to the exciter 24 by other means, which is not limited by the embodiment of the present invention.

In some embodiments, there may also be at least one spring in the one or more resilient bodies, a first end of each spring may be glued to the corresponding actuator 24, and a second end of each spring may be glued to the cover plate 25. Each spring of the at least one spring may form an elastic buffer between the corresponding actuator 24 and cover plate 25, since the spring is elastically deformable by the pressing between the actuator 24 and the cover plate 25. Meanwhile, when the exciter 24 makes indirect contact with the cover plate 25 through the spring, the spring can also restrict the amplitude of the exciter 24, thereby reducing the loss of energy of the exciter 24 in the direction away from the sound-emitting panel 23.

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

In some embodiments, one or more ventilation holes corresponding to one or more exciters 24 may be disposed on the cover plate 25, so that when the exciters 24 vibrate, air on two sides of the cover plate 25 may exchange with each other through the ventilation holes, that is, when the exciters 24 vibrate, the ventilation holes may balance the air pressure difference between two sides of the cover plate 25, so as to make air flow on two sides of the cover plate 25 smoother.

In some embodiments, the cover plate 25 may have a strip-shaped structure, two ends of the cover plate 25 are fixedly connected to the fixing frame 21, one or more grooves corresponding to the one or more exciters 24 may be disposed on the cover plate 25, and one side of each exciter 24 away from the sound-emitting plate 23 is located in the corresponding groove.

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 actuator 24 and each of the side and bottom surfaces of the groove, and the shape of the groove may be the same as or similar to the shape of the actuator 24. When the driver 24 is detached from the sound board 23, the recess corresponding to each driver 24 can vertically limit the driver 24, and can temporarily carry the detached driver 24.

It should be noted that one or more ribs may be disposed on the cover plate 25 along the length direction. When the number of the one or more ribs is plural, the plural ribs may be uniformly arranged in the width direction of the cover plate 25. The ribs may increase the strength of the cover plate 25, may ensure that the cover plate 25 is able to apply more stress to the actuator 24, while enhancing the stability of the cover plate 25.

In some embodiments, the cover plate 25 may have a straight strip structure, and of course, the cover plate 25 may have a bent strip structure as long as it can function to fasten the exciter 24. For example, when the plurality of exciters 24 are arranged in a straight line on the sound-emitting plate 23, the cover plate 25 may be a linear strip-shaped cover plate 25, and when the plurality of exciters 24 are arranged in a non-straight line on the sound-emitting plate 23, the cover plate 25 may be configured to bend the cover plate 25 according to the distribution pattern of the exciters 24.

Wherein, the both ends of apron 25 can be through screw and fixed frame 21 fixed connection, certainly also can be through other modes and fixed frame 21 fixed connection, the embodiment of the utility model provides a do not limit to this.

In some embodiments, the projection screen 2 may further include one or more support mechanisms, each of which may include a hanger and a first resilient pad; the support arm of stores pylon stretches into fixed frame 21 and hangs the inslot, and first elastic cushion is detained on the support arm of stores pylon, and can fill the support arm of stores pylon and hang the clearance between the lateral wall in groove, and the fixed arm of stores pylon is used for being connected with the supporter.

Wherein, can be provided with one section linkage segment between the support arm of stores pylon and the fixed arm to realize being connected between support arm and the fixed arm. The support arm, the connecting end and the fixing arm can be connected to form a U-shaped structure, or the orientation of the end of the support arm far away from the connecting section is opposite to the orientation of the end of the fixing arm far away from the connecting section. Can obtain through integrated into one piece's mode between support arm, link and the fixed arm to increase the bulk strength of stores pylon.

Illustratively, the support arm is perpendicularly connected to a first end of the connecting segment and the securing arm is perpendicularly connected to a second end of the connecting segment. At this time, the connection section may serve as a support platform.

The first elastic pad can be made of silica gel or other materials as long as the first elastic pad has buffering, vibration absorbing and bearing capabilities.

In some embodiments, the first elastic pad may have a U-shaped structure, and a vertical distance between the first side wall and the second side wall of the first elastic pad is equal to a thickness of the support arm of the hanger. Like this, the support arm of stores pylon can block into the space between the first lateral wall and the second lateral wall of first cushion, and when the support arm stretched into fixed frame 21's string groove, can fill the support arm of stores pylon and hang the space between the groove through the first lateral wall and the second lateral wall of first cushion to avoid the support arm and hang the rigid contact between the groove, thereby realize the stores pylon and hang the damping between the groove.

The sum of the thickness of the first side wall of the first elastic cushion, the thickness of the second side wall and the thickness of the supporting arm can be equal to the vertical distance between two opposite inner walls on the hanging groove, so that the first elastic cushion and the fixed frame 21 are prevented from shaking.

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

The first elastic pad with the S-shaped structure is a structure with two U-shaped grooves and the openings of the two U-shaped grooves face opposite directions. When the support arm through the stores pylon stretches into and hangs the groove in order to support fixed frame 21, can fill the support arm and hang the clearance between the lateral wall in groove through two lateral walls in first U-shaped groove on the first cushion to realize the stores pylon and hang the one-level damping between the groove, fill supporting platform and the clearance of hanging between the lateral wall in groove through the bottom in second U-shaped groove, thereby realize the stores pylon and hang the second grade damping between the groove.

The first elastic cushion comprises 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, 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.

The sum of the thickness of the first side wall of the first elastic cushion, the thickness of the connecting wall and the thickness of the supporting arm can be equal to the vertical distance between two opposite inner walls on the hanging groove, so that the first elastic cushion and the fixed frame 21 are prevented from shaking.

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

Wherein, when the vertical distance between the second sidewall of the first elastic pad and the connecting wall is equal to the thickness of the sidewall of the hanging groove, the second U-shaped groove of the first elastic pad can be more tightly buckled on the sidewall of the hanging groove to further fasten the connection between the hanger and the fixed frame 21. When the vertical distance between the second side wall of the first elastic cushion and the connecting wall is greater than the thickness of the side wall of the hanging groove, the hanging groove can be smoothly clamped into a gap between the second side wall of the first elastic cushion and the connecting wall when the fixed frame 21 is hung and installed conveniently.

Certainly, in order to realize that the first U-shaped groove of first cushion can be detained at the support arm, the second U-shaped groove can be detained on the lateral wall of hanging the groove, the vertical distance between the first lateral wall of first cushion and the connecting wall also can slightly be less than the thickness of the support arm of stores pylon, the vertical distance between the second lateral wall of first cushion and the connecting wall also can slightly be less than the thickness of the lateral wall of hanging the groove, thereby between first cushion and the stores pylon, and the cooperation mode between first cushion and the hanging groove can be interference fit, can guarantee the stores pylon, the fastening nature between first cushion and the fixed frame 21.

In some embodiments, the second connecting portion between the second side wall of the first elastic pad and the connecting wall may be fixed on the support platform of the hanger by a double-sided adhesive tape, and the double-sided adhesive tape may prevent the first elastic pad from being displaced and falling off. The first side wall and the connecting wall of the first elastic cushion can also be fixed on the supporting arm of the hanging rack through double-sided adhesive tape so as to realize the closer fixation of the first elastic cushion.

In some embodiments, the hardness of the first resilient pad may be within a hardness threshold range. The hardness threshold range may be a hardness range that ensures that the first elastic pad is not easily deformed and has a certain vibration absorbing capability. If the hardness of the first elastic pad is too low, the first elastic pad is easily deformed under the action of external force, and cannot tightly buckle the hanging rack and the fixed frame 21, so that the fixed frame 21 is easily shaken and inclined, and the fixed frame 21 is easily dropped. If the hardness of the first elastic pad is too high, the vibration absorbing ability of the first elastic pad may be weakened. For example, the hardness of the first elastic pad may be controlled within a range of 30 degrees to 40 degrees of shore hardness.

In some embodiments, the opening edge of the first U-shaped groove and the opening edge of the second U-shaped groove of the first elastic pad may be chamfered, so that the first U-shaped groove can be smoothly buckled on the support arm during installation, and the second U-shaped groove can be smoothly buckled on the side wall of the hanging groove. Of course, the two ends of the first connecting part on the first elastic cushion, which are connected with the first side wall and the connecting wall, can also be provided with chamfers, so that the first side wall and the connecting wall of the first elastic cushion can more smoothly extend into the hanging groove.

In some embodiments, each support mechanism may further comprise a second resilient pad and a mount; the fixing arm of the hanging rack is provided with a through hole, the side wall of the second elastic pad is provided with a circle of groove, the fixing arm of the hanging rack can be clamped into the groove based on the through hole, and the fixing piece penetrates through the through hole and the second elastic pad and is connected with the supporting body.

The second elastic pad can be made of silica gel or other materials as long as the second elastic pad has buffering, vibration absorbing and bearing capabilities. Like this, because the second cushion can avoid between the fixed arm of stores pylon and the mounting to and avoid the rigid contact between the fixed arm of stores pylon and the supporter, and the second cushion has the effect that the buffering was inhaled the shake, thereby can avoid between mounting and the fixed arm, and the production of noise between supporter and the fixed arm, thereby realize the damping between stores pylon and the supporter.

The end face of the second elastic pad can be round, square or other shapes. In order to enable the second elastic pad to be tightly embedded on the fixed arm of the hanger based on the through hole on the hanger, the shape and size of the cross section of the groove of the second elastic pad can be the same as those of the through hole on the hanger, and the through hole can be circular, square or other shapes.

The fixing member may include a fixing screw or other fixing body as long as the second elastic pad and the hanger can be screwed to the support body.

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

When the fixing piece is a screw, the gasket can be sleeved on a screw rod of the fixing screw, is in contact with a screw head and is pressed on the end face of the second elastic pad by the screw head.

In the in-service use process, the material of second cushion is softer, and the stores pylon can and apply for the certain power of second cushion when receiving the external force of perpendicular to second cushion terminal surface direction, makes the second cushion produce elastic deformation easily, and then the stores pylon is based on the second cushion that the through-hole deviates from easily. Therefore, the size of the gasket can be larger than that of the through hole, so that the hanging rack can be prevented from being separated, and meanwhile, external force can be distributed to the gasket with the larger area, so that the second elastic cushion is not easy to deform. In addition, the shape of the spacer may be circular, square or other shapes.

Wherein, the gasket can be through pressure casting technology preparation, and the surface is comparatively smooth, and the precision is higher, and of course, the gasket also can be made through other manufacturing process, the embodiment of the utility model provides a do not limit to this.

The embodiment of the utility model provides an in, first cushion can realize projection screen 2's one-level damping and second grade damping, and projection screen 2's tertiary damping can be realized to the second cushion. The combined use of the first elastic pad and the second elastic pad may make the vibration reduction effect of the projection screen 2 more significant.

In summary, the projection Screen 2 with the sound board 23 has dual physical functions of image display and sound playing, the projection system does not need to use a traditional speaker, and the sound board 23 and the optical Screen 22 are used in combination, so as to achieve the effect of EVS (Excited visual display). And a plurality of exciters 24 fixed to the sound-emitting panel 23 can excite the sound-emitting panel 23 at different positions so that the sound-emitting panel 23 can emit a stereo bending sound wave.

It should be noted that the way in which the driver 24 drives the sound-generating plate 23 to generate sound has many excellent properties. In terms of timbre, the amplitude of the sound-emitting plate 23 is micron-sized small amplitude, distortion is small, transient response is excellent, sound reproduction is high, and appropriate force, high definition and good spatial depth are provided, so that the sound-emitting plate 23 can transmit sounds of more real instruments or human voice and the like. In terms of sound propagation, the sound-emitting panel 23 is a surface-generating source, has a uniform sound field, and can emit sound stereoscopically at 360 degrees, and its sound pressure level changes slowly with distance, and even a small sound can be propagated to a more distant position. In terms of audio frequency, the frequency of the sound emitted by the sound emitting plate 23 is extremely wide, so that a listener closest to a screen does not suffer from the impact of near-distance sound pressure and does not feel too loud, the listener can still hear clearly when the listener is far away, and the sound with the same sound quality can be obtained when the listener listens to any position; when the listener moves to the position opposite to the screen from the side of the screen, the high and low sounds heard by the listener do not change obviously, and the sound volume and the sound field are not reduced, even the screen is shielded to a certain degree, and the sound quality is not influenced obviously.

Therefore, when the sound emitted from the sound emitting panel 23 is emitted along with the image, it is possible to bring a strong viewing experience to the user. In addition, the projection screen 2 is a thin plate type screen, has small volume and light weight, and can bring better impression to users.

The embodiment of the utility model provides an in, with the laminating of optical screen in the first side of sound board, when projection equipment sent projection light to optical screen like this, the optical screen can reflect this projection light to realize the projection of picture on optical screen. In addition, one or more exciters electrically connected with the projection equipment are fixed on the sound-emitting board, so that the projection equipment can drive the exciters to vibrate, and the sound-emitting board is driven by the exciters to vibrate together so as to emit sound through the sound-emitting board. Because the sound board is fixed on the fixed frame, the optical screen is attached to the sound board, so that the optical screen of the sound board can be ensured to be positioned in the same area, the effect of sound emitted from the picture can be achieved, the condition that the picture and the sound are not uniform is avoided, and the projection effect of the projection system is improved. Since the cover plate is fastened to one or more of the drivers, the amplitude of each driver in the direction away from the sound-emitting panel can be reduced by the cover plate, thereby reducing the loss of energy when the driver vibrates. The first elastic cushion and the second elastic cushion have the functions of buffering and absorbing vibration, and noise generated by vibration of the projection screen is effectively avoided.

Fig. 2 illustrates a rear view structural schematic diagram of a projection screen according to an embodiment of the present invention, and fig. 3 illustrates a side view structural schematic diagram of a projection screen according to an embodiment of the present invention. As shown in fig. 2 and 3, the projection screen includes: a fixed frame 21, an optical screen 22, a sound-emitting panel 23, one or more actuators 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, the 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 with the fixed frame 21 through the fixing piece 25; the optical screen 22 is used for receiving the projection light emitted by the projection device 1 and displaying pictures, the one or more exciters 24 are used for being electrically connected with the projection device 1, and the one or more exciters 24 can excite the sound-generating plate 23 to vibrate so as to generate sound.

It should be noted that, the structures of the fixed frame, the optical screen, the sound-generating plate, the one or more actuators, the cover plate and the plurality of elastic connecting members according to the embodiments of the present invention may be the same as or similar to the structures of the fixed frame, the optical screen, the sound-generating plate, the one or more actuators, the cover plate and the plurality of elastic connecting members according to the above embodiments, and the embodiments of the present invention are not described in detail again.

The embodiment of the utility model provides an in, with the laminating of optical screen in the first side of sound board, when projection equipment sent projection light to optical screen like this, the optical screen can reflect this projection light to realize the projection of picture on optical screen. In addition, one or more exciters electrically connected with the projection equipment are fixed on the sound-emitting board, so that the projection equipment can drive the exciters to vibrate, and the sound-emitting board is driven by the exciters to vibrate together so as to emit sound through the sound-emitting board. Because the sound board is fixed on the fixed frame, the optical screen is attached to the sound board, so that the optical screen of the sound board can be ensured to be positioned in the same area, the effect of sound emitted from the picture can be achieved, the condition that the picture and the sound are not uniform is avoided, and the projection effect of the projection system is improved.

The above description is only illustrative of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A projection system, characterized in that the projection system comprises: the projection screen comprises a fixed frame, an optical screen, a sound generating plate, one or more exciters, a cover plate and a plurality of elastic connecting pieces;

2. The projection system of claim 1, wherein the sound board comprises a first skin, a second skin, and a honeycomb core, the honeycomb core being bonded between the first skin and the second skin;

3. The projection system of claim 2, wherein edges of the first skin and/or the second skin extend beyond edges of the honeycomb core plate, and portions of the first skin and/or the second skin that extend beyond edges of the honeycomb core plate wrap around edges of the fixed frame and are connected to the fixed frame by the plurality of elastic connectors.

4. The projection system of claim 1, wherein the sound board comprises a first skin, a second skin, a honeycomb core plate, and a flexible connector;

5. The projection system of any of claims 2-4, wherein a thickness of the first skin is greater than a thickness of the second skin.

6. The projection system of claim 1, wherein the edge of the sound-emitting panel is provided with a plurality of through holes corresponding to the plurality of elastic connecting members one to one, a first end of each elastic connecting member is connected to the corresponding through hole, and a second end of each elastic connecting member is connected to the fixed frame.

7. The projection system of claim 6, wherein the projection screen further comprises a plurality of eyelet buttons, the eyelet buttons correspond to the through holes one-to-one, each eyelet button wraps around an edge of a corresponding through hole, and the first end of each elastic connector is connected to a corresponding eyelet button.

8. The projection system of claim 1, wherein the optical screen is attached to the sound board by double-sided adhesive.

9. The projection system of claim 1, wherein the projection screen further comprises one or more foam adhesives in one-to-one correspondence with the one or more actuators, and wherein the one or more actuators are respectively bonded to the sound-generating panel by the corresponding foam adhesives.

10. The projection system of claim 1, wherein the sound-emitting panel is a unitary panel having an area less than or equal to an area of the optical screen;

11. A projection screen, comprising: a fixed frame, an optical screen, a sound board, one or more exciters, a cover plate and a plurality of elastic connecting pieces;

the optical screen is used for receiving projection light emitted by the projection equipment and displaying pictures, the one or more exciters are electrically connected with the projection equipment, and the one or more exciters can excite the sound-emitting plate to vibrate to emit sound.