Negative pressure screen for optical projection

Abstract

The embodiment of the present application provides a negative pressure screen for optical projection, comprising an inner screen, an outer screen, and an outer structural layer arranged in sequence from the inside to the outside, the outer screen being provided with sound-permeable holes, the outer structural layer having an acoustic cavity corresponding to the sound-permeable holes, the acoustic cavity having an opening facing the sound-permeable holes, and the opening being sealed and connected to the sound-permeable holes, the acoustic cavity being used to accommodate acoustics, the inner screen being a woven structure, the inner screen having a first area and a second area, the first area corresponding to the sound-permeable holes, and the woven gap in the first area being larger than the woven gap in the second area. The embodiment of the present application provides a negative pressure screen for optical projection, which enables sound to better penetrate the outer and inner screens of the negative pressure screen for optical projection, thereby providing a better experience.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical technology, and in particular to a negative pressure screen for optical projection. Background Art

[0002] With the rapid development of the national economy and the continuous improvement of people's living standards, the demand for recreational activities has become increasingly strong. In this situation, along with the development of the amusement industry, curved screen theaters, dome theaters, and even capsule theaters have emerged. However, with the rise of these theaters, the high costs have made some investors sigh. With the market's iteration, small dome and capsule screens have emerged. These small dome and capsule screens typically use negative pressure screens used for optical projection. This negative pressure screen for optical projection is a soft screen and has the characteristics of low cost and easy construction. However, the disadvantage is relatively obvious. The projector and audio system can only be placed outside the baseline of the screen, which cannot provide the audience with a true sound immersion experience.

[0003] 5.1-channel or 7.1-channel sound systems, or even panoramic sound field systems, require multiple locations on the capsule screen and dome screen to ensure the sound field effect. However, the outer layer of negative pressure screens used for optical projection on the market is mostly made of PVC-coated cloth, which has extremely poor sound transmittance. After sound passes through the outer layer of the screen and enters the structural frame, the sound will propagate freely within this cavity, causing sound chaos. The inner layer of negative pressure screens used for optical projection, however, requires negative pressure and therefore has high sound insulation properties. Therefore, the sound of speakers placed on the outside of the negative pressure screen for optical projection will be reduced and become turbid after entering the negative pressure capsule screen and dome screen, resulting in a poor sound field effect. Summary of the Invention

[0004] In view of this, an embodiment of the present application provides a negative pressure screen for optical projection, which can enable sound to better penetrate the outer and inner screens of the negative pressure screen for optical projection, bringing a better experience.

[0005] According to an embodiment of the present application, a negative pressure screen for optical projection is provided, comprising an inner screen, an outer screen and an outer structural layer arranged in sequence from the inside to the outside, the outer screen being connected to the inner screen, and a negative pressure is formed between the outer screen and the inner screen through a negative pressure device, the outer screen being provided with a sound hole, the outer structural layer having an acoustic cavity corresponding to the sound hole, the acoustic cavity having an open opening facing the sound hole, and the open opening being sealedly connected to the sound hole, the acoustic cavity being used for arranging acoustics, the inner screen being a woven structure, the inner screen having a first area and a second area, the first area corresponding to the sound hole, and the weaving gap in the first area being larger than the weaving gap in the second area.

[0006] Optionally, the negative pressure screen for optical projection further comprises a structural frame, wherein the structural frame is located between the inner layer screen and the outer layer screen, and the structural frame is detachably connected by a plurality of connecting rods.

[0007] Optionally, the open opening of the acoustic cavity and the sound-permeable hole are connected by a sealant.

[0008] Optionally, a first clamping portion is provided at the open mouth of the sound cavity, and a second clamping portion is provided at the sound-permeable hole. The first clamping portion and the second clamping portion are clamped and connected, and the outside of the first clamping portion and the second clamping portion are both covered with a sealing layer.

[0009] Optionally, the wall of the acoustic cavity facing outwards can open or close the acoustic cavity.

[0010] Optionally, a sound insulation layer is provided on the inner wall surface of the sound cavity.

[0011] Optionally, the elasticity of the first region is greater than the elasticity of the second region.

[0012] Optionally, the outer structural layer further includes a fitting portion, and the fitting portion is detachably connected to the acoustic cavity.

[0013] Optionally, the outer structural layer is made of waterproof and corrosion-resistant material.

[0014] Optionally, the first area of ​​the inner layer cloth can adjust its weaving gap according to the pressure in the negative pressure curtain for optical projection.

[0015] According to the negative pressure screen for optical projection provided by the embodiments of the present application, a negative pressure is formed between the outer and inner screens, preventing the inner screen from collapsing and ensuring the overall structural stability of the negative pressure screen for optical projection. The outer layer of the outer screen is provided with an outer structural layer having an acoustic cavity, and the outer layer of the outer screen is provided with sound-transmitting holes corresponding to the positions of the acoustic cavities. This allows the sound of the speakers within the acoustic cavity to be transmitted through the sound-transmitting holes and into the space between the outer and inner screens. Furthermore, the acoustic cavity has an opening facing the sound-transmitting holes, which makes the sound transmission more directional and prevents the random propagation of sound, which can cause sound confusion. The inner layer of the screen is woven, so the sound of the speakers can pass through the gaps in the fabric in the first region. Furthermore, the gaps in the fabric in the first region of the inner screen corresponding to the sound-transmitting holes are larger than the gaps in the fabric in the second region, resulting in a higher sound transmission rate in the first region. This allows the sound of external speakers to pass through the outer and inner screens, and by increasing the gaps in the fabric in the first region, the sound transmission rate of the speakers is improved. It not only realizes the structural form of the negative pressure screen for optical projection, but also improves the sound transmission of the negative pressure screen for optical projection, which can bring the audience a more realistic sound immersion experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the cross-sectional structure of a negative pressure screen for optical projection;

[0018] Figure 2 Schematic diagram of the cross-sectional structure of a negative pressure screen for optical projection according to an embodiment of the present application;

[0019] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0020] Description of reference numerals:

[0021] Negative pressure screen 100 for optical projection;

[0022] Inner curtain 10;

[0023] Outer curtain 20; sound-permeable holes 201;

[0024] Outer structural layer 30; sound cavity 301; open mouth 3011; sound insulation layer 302; mating portion 303;

[0025] Structural frame 40;

[0026] Speaker 200. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0028] As mentioned above, with the rapid development of the national economy and the continuous improvement of people's living standards, people's demand for recreational activities has become increasingly strong. Under this situation, along with the development of the amusement industry, arc screen theaters, dome theaters and even capsule screen theaters have emerged. However, with the prosperity of these theaters, the high costs have made some investors sigh. With the iteration of the market, small dome and capsule screens came into being. Figure 1As shown, this small spherical capsule screen usually adopts a negative pressure screen for optical projection. This negative pressure screen for optical projection is a soft screen and has the characteristics of low cost and easy construction. However, its disadvantages are relatively obvious. The projector and speakers can only be arranged outside the baseline of the screen, which cannot provide the audience with a real sound immersion experience.

[0029] 5.1 channel sound system or 7.1 channel sound system, or even panoramic sound field system needs to be deployed at multiple points on the capsule screen and the ball screen to ensure the sound field effect. Figure 1 As shown, the outer layer 20 of commercially available negative pressure screens for optical projection is often made of PVC-coated fabric, a material with extremely poor sound transmission. After sound passes through the outer layer 20 and enters the structural frame 40, it propagates freely within this cavity, resulting in a chaotic sound field. However, the inner layer 10 of negative pressure screens for optical projection, due to the negative pressure required, has high sound insulation properties. Therefore, the sound from speakers installed outside the negative pressure screen will be reduced and become muddy when it enters the negative pressure capsule screen or dome screen, resulting in a poor sound field.

[0030] Therefore, if Figure 2 and Figure 3 As shown, a negative pressure screen 100 for optical projection according to an embodiment of the present application can not only realize the negative pressure structure of the negative pressure screen 100 for optical projection, but also enable the sound of the audio 200 to penetrate the outer screen 20 and the inner screen 10, thereby bringing a better user experience.

[0031] The following is attached with the instruction manual Figure 2 and Figure 3 A negative pressure screen 100 for optical projection according to an embodiment of the present application is described in detail.

[0032] According to the present invention, a negative pressure screen 100 for optical projection is provided. Figure 2 As shown, it includes an inner curtain layer 10, an outer curtain layer 20 and an outer structural layer 30 which are arranged in sequence from the inside to the outside.

[0033] It should be noted here that the negative pressure screen 100 for optical projection is a medium that is sealed by two layers of sealing material, namely the inner screen 10 and the outer screen 20. The structure is supported by a structural frame 40, and then the inner screen 10 is formed into an inner layer of a predetermined shape screen by vacuuming, which is used to project a medium to form an image.

[0034] like Figure 2As shown, in the negative pressure screen 100 for optical projection of the embodiment of the invention, the outer screen 20 is connected to the inner screen 10, and a negative pressure device is used to form a negative pressure between the outer screen 20 and the inner screen 10. As a result, the inner screen 10 and the outer screen 20 of the negative pressure screen 100 for optical projection form a stable structural shape, ensuring the viewing quality of the audience after the image is projected on the inner screen 10 of the negative pressure screen 100 for optical projection.

[0035] Among them, such as Figure 3 As shown, the outer curtain 20 is provided with sound-transmitting holes 201, and the outer structural layer 30 has an acoustic cavity 301 corresponding to the sound-transmitting holes 201. Acoustic cavity 301 is used to house the speaker 200. Acoustic cavity 301 provides a stable and protective installation space for the speaker 200, thereby protecting it. Compared to placing the speaker 200 outside the outer curtain 20 of the negative pressure screen 100 for optical projection, this prevents damage to the speaker 200. Furthermore, the acoustic cavity 301 corresponds to the position of the sound-transmitting holes 201, allowing the sound produced by the speaker 200 to be transmitted from the sound-transmitting holes 201 through the outer curtain 20 to the inner curtain 10.

[0036] like Figure 3 As shown, the acoustic cavity 301 has an opening 3011 facing the sound-transmitting hole 201, and the opening 3011 is sealed with the sound-transmitting hole 201. Therefore, the sound from the speaker 200 is transmitted through the opening 3011, which makes the sound transmission directional and prevents the sound from being transmitted in random directions, resulting in unclear sound. Furthermore, the sealing connection between the opening 3011 of the acoustic cavity 301 and the sound-transmitting hole 201 ensures sound transmission while preventing the negative pressure screen 100 used for optical projection from having a poor vacuum effect due to sealing problems, which could cause the inner layer of the screen 10 to collapse and reduce the audience's viewing experience.

[0037] Furthermore, the inner layer curtain 10 is an inner layer curtain 10 of a woven structure. Specifically, the inner layer curtain 10 adopts a woven structure so that the inner layer curtain 10 has gaps, which can facilitate the sound of the speaker 200 to penetrate. In addition, the inner layer curtain 10 has a first area and a second area. The first area corresponds to the sound-transmitting hole 201, and the woven gaps in the first area are larger than the woven gaps in the second area. Therefore, the sound transmittance of the first area is higher than that of the second area. It can be seen that after the sound of the speaker 200 passes through the sound-transmitting hole 201, it can continue to be transmitted to the interior of the negative pressure curtain 100 for optical projection through the woven gaps in the first area, ensuring that the sound is stably transmitted to the interior of the negative pressure curtain 100 for optical projection, thereby enhancing the sound immersion experience of the audience inside the negative pressure curtain 100 for optical projection.

[0038] According to the negative pressure screen 100 for optical projection provided by the embodiment of the present application, a negative pressure is formed between the outer screen 20 and the inner screen 10, which prevents the inner screen 10 from collapsing, and can ensure the stability of the overall structural form of the negative pressure screen 100 for optical projection. The outer surface of the outer screen 20 is provided with an outer structural layer 30 having an acoustic cavity 301, and the outer screen 20 is provided with a sound-permeable hole 201 corresponding to the position of the acoustic cavity 301, thereby allowing the sound of the sound 200 in the acoustic cavity 301 to be transmitted through the sound-permeable hole 201 into the space between the outer screen 20 and the inner screen 10. At the same time, the acoustic cavity 301 has an open mouth 3011 facing the sound-permeable hole 201, thereby making the sound transmission of the sound 200 more directional, preventing the sound from being spread randomly and causing sound confusion. The inner screen 10 adopts a woven structure, so that the sound of the sound 200 can pass through the gaps in the woven fabric in the first area. Furthermore, the fabric gaps in the first area of ​​the inner screen 10 corresponding to the sound-transmitting holes 201 are larger than those in the second area. Therefore, the sound from the speaker 200 has a higher sound transmittance in the first area. This allows the sound from the external speaker 200 to pass through both the outer and inner screens 20 and 10. Furthermore, by increasing the fabric gaps in the first area, the sound transmittance of the speaker 200 is improved. This achieves both the structural form of the negative pressure screen 100 for optical projection and the improved sound transmittance of the negative pressure screen 100 for optical projection, providing viewers with a more realistic sound immersion experience.

[0039] like Figure 3 As shown, the negative pressure screen 100 for optical projection further includes a structural frame 40, which is located between the inner screen 10 and the outer screen 20, and the structural frame 40 is detachably connected by a plurality of connecting rods. Specifically, when the negative pressure screen 100 for optical projection shapes the inner screen 10 and the outer screen 20 by negative pressure, the outer screen 20 can be attached to the outer surface of the structural frame 40, that is, the structural frame 40 can prop up the outer screen 20, and after vacuuming between the inner screen 10 and the outer screen 20 of the negative pressure screen 100 for optical projection, the inner screen 10 can be propped up along the shape of the structural frame 40, so that the inner screen 10 can be projected. It should be noted that, as Figure 2 As shown, there is a gap between the inner curtain 10 and the structural frame 40, and between the structural frame 40 and the outer curtain 20. In other words, the inner curtain 10 is not directly attached to the structural frame 40.

[0040] At the same time, the structural frame 40 adopts a structure of multiple detachable connecting rods, which can be easily assembled and disassembled. After disassembly, it is convenient to transport the negative pressure screen 100 for optical projection as a whole.

[0041] In some embodiments of the present invention, the open opening 3011 of the acoustic cavity 301 is connected to the sound-permeable hole 201 by a sealant. Negative pressure must be maintained between the inner and outer layers of the negative pressure screen 100 for optical projection, so a seal is required between the inner and outer layers to ensure stable pressure. As previously mentioned, the outer layer 20 has sound-permeable holes 201 to facilitate sound transmission. Therefore, to maintain pressure within the negative pressure screen 100 for optical projection and prevent ineffective vacuuming, a sealed connection is required between the acoustic cavity 301 and the sound-permeable hole 201. The sealant used between the two allows for quick bonding after the acoustic cavity 301 is connected to the negative pressure screen 100 for optical projection, or the sealant can be cut with a tool when the acoustic cavity 301 needs to be removed, which is quick and convenient.

[0042] In some embodiments of the present invention, a first clamping portion is provided at the open mouth 3011 of the sound cavity 301, and a second clamping portion is provided at the sound-transmitting hole 201. The first clamping portion and the second clamping portion are clamped together, and the outside of the first clamping portion and the second clamping portion are both covered with a sealing layer. Specifically, the outside of the first clamping portion at the open mouth 3011 of the sound cavity 301 can be covered with a sealing layer, and the outside of the second clamping portion at the sound-transmitting hole 201 can be covered with a sealing layer. Therefore, after the first clamping portion and the second clamping portion are clamped together, the sealing of the connection between the two is achieved by docking the sealing layers of the two. While ensuring sound penetration, the negative pressure effect of the negative pressure curtain 100 used for optical projection is also guaranteed.

[0043] The sealing layer may be a sealing layer made of rubber.

[0044] In some embodiments of the present invention, the wall of the acoustic cavity 301 facing outward can open or close the acoustic cavity 301 .

[0045] Specifically, the sound cavity 301 can be opened and closed through the wall facing outward, which makes it easy to open the sound cavity 301 and to place the speaker 200 inside the sound cavity 301. At the same time, it is convenient to repair and replace the speaker 200 and clean the inside of the sound cavity 301.

[0046] Furthermore, if Figure 3 As shown, the inner wall of the acoustic cavity 301 is provided with a sound insulation layer 302. The provision of the sound insulation layer 302 within the acoustic cavity 301 prevents the loud sound of the acoustic speaker 200 from being transmitted to the exterior of the negative pressure screen 100 for optical projection, thereby generating noise outside the negative pressure screen 100 for optical projection. Furthermore, the provision of the sound insulation layer 302 prevents the sound of the acoustic speaker 200 from being excessively reflected from the inner wall of the acoustic cavity 301, thereby causing sound confusion and reducing the auditory immersion experience of the audience within the negative pressure screen 100 for optical projection.

[0047] Furthermore, the inner wall of the sound cavity 301 facing the outside also has a sound insulation layer 302, which can isolate the sound of the external environment and prevent it from entering the interior of the negative pressure screen 100 for optical projection, thereby affecting the user's viewing experience when using the negative pressure screen 100 for optical projection. It can also prevent the sound inside the negative pressure screen 100 for optical projection from being transmitted to the outside of the negative pressure screen 100 for optical projection, thereby generating noise to the external environment. At the same time, it can also prevent the sound of the speakers 200 in the sound cavity 301 from being reflected excessively on the inner wall of the sound cavity 301, thereby causing sound confusion and reducing the sound immersion experience of the audience in the negative pressure screen 100 for optical projection.

[0048] In some embodiments of the present invention, the elasticity of the first region is greater than that of the second region. Specifically, the greater elasticity of the first region than that of the second region can increase the interwoven gaps in the fabric structure of the first region when a vacuum is drawn within the negative pressure screen 100 for optical projection, thereby increasing the sound transmission rate of the sound source 200 through the inner layer of the screen 10.

[0049] At the same time, the first region of the inner layer fabric 10 can adjust its fabric gaps in response to the pressure within the negative pressure screen 100 for optical projection. In other words, as the internal pressure of the negative pressure screen 100 increases, and until the pressure within the negative pressure screen 100 remains constant, the fabric gaps in the first region can increase, thereby improving the sound transmission rate of the speaker 200. When the pressure within the negative pressure screen 100 is insufficient, the inner layer fabric 10 can utilize its elasticity to reduce the fabric gaps in the first region, thereby ensuring sufficient pressure within the negative pressure screen 100 and preventing collapse of the inner layer fabric 10 of the negative pressure screen 100.

[0050] like Figure 3 As shown, the outer structural layer 30 also includes a mating portion 303, which is detachably connected to the acoustic cavity 301. This detachable connection between the mating portion 303 and the acoustic cavity 301 forms a protective layer on the exterior of the outer screen 20, protecting the outer screen 20. Furthermore, the mating portion 303 can be designed to enhance the aesthetics of the outer structure and improve the overall aesthetics of the negative pressure screen 100 for optical projection.

[0051] It should be noted that the structural frame 40 is a supporting structure disposed between the inner curtain 10 and the outer curtain 20, and the outer structural layer 30 serves as an external decorative layer for the outer curtain 20. The structural frame 40 and the outer structural layer 30 are not directly connected; they are independent structures. Furthermore, the outer structural layer 30 is formed by the connection between the mating portion 303 and the acoustic cavity 301. The acoustic cavity 301 and the outer curtain 20 are sealed together, and the mating portion 303 is connected to the acoustic cavity 301. In other words, the connection between the mating portion 303 or the entire outer structural layer 30 and the outer curtain 20 is achieved through the acoustic cavity 301.

[0052] In some embodiments of the present invention, the outer structural layer 30 is made of a waterproof and corrosion-resistant material. Specifically, the use of a waterproof and corrosion-resistant material for the outer structural layer can further improve the water-repellent performance of the negative pressure screen 100 for optical projection, prevent water from entering the acoustic cavity 301 and damaging the acoustic system 200, and further increase the overall service life of the negative pressure screen 100 for optical projection.

[0053] According to the negative pressure screen 100 for optical projection provided by the embodiment of the present application, a negative pressure is formed between the outer screen 20 and the inner screen 10, which prevents the inner screen 10 from collapsing, and can ensure the stability of the overall structural form of the negative pressure screen 100 for optical projection. The outer surface of the outer screen 20 is provided with an outer structural layer 30 having an acoustic cavity 301, and the outer screen 20 is provided with a sound-permeable hole 201 corresponding to the position of the acoustic cavity 301, thereby allowing the sound of the sound 200 in the acoustic cavity 301 to be transmitted through the sound-permeable hole 201 into the space between the outer screen 20 and the inner screen 10. At the same time, the acoustic cavity 301 has an open mouth 3011 facing the sound-permeable hole 201, thereby making the sound transmission of the sound 200 more directional, preventing the sound from being spread randomly and causing sound confusion. The inner screen 10 adopts a woven structure, so that the sound of the sound 200 can pass through the gaps in the woven fabric in the first area. Furthermore, the fabric gaps in the first area of ​​the inner screen 10 corresponding to the sound-transmitting holes 201 are larger than those in the second area. Therefore, the sound from the speaker 200 has a higher sound transmittance in the first area. This allows the sound from the external speaker 200 to pass through both the outer and inner screens 20 and 10. Furthermore, by increasing the fabric gaps in the first area, the sound transmittance of the speaker 200 is improved. This achieves both the structural form of the negative pressure screen 100 for optical projection and the improved sound transmittance of the negative pressure screen 100 for optical projection, providing viewers with a more realistic sound immersion experience.

[0054] The above implementation methods are only used to illustrate the embodiments of the present application, and are not intended to limit the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of the present application, and the scope of patent protection of the embodiments of the present application should be defined by the claims.

Claims

1. A negative pressure screen for optical projection, characterized in that: The invention comprises an inner curtain, an outer curtain and an outer structural layer arranged in sequence from the inside to the outside, the outer curtain is connected to the inner curtain, and a negative pressure is formed between the outer curtain and the inner curtain by a negative pressure device, the outer curtain is provided with a sound-transmitting hole, the outer structural layer has an acoustic cavity corresponding to the sound-transmitting hole, the acoustic cavity has an opening facing the sound-transmitting hole, and the opening is sealed with the sound-transmitting hole, the acoustic cavity is used to set up acoustics, the inner curtain is a woven structure inner curtain, the inner curtain has a first area and a second area, the first area corresponds to the sound-transmitting hole, and the weaving gap of the first area is larger than the weaving gap of the second area; The elasticity of the first region is greater than that of the second region, and the weaving gap of the first region of the inner layer curtain can be adjusted according to the pressure in the negative pressure curtain for optical projection.

2. The negative pressure screen for optical projection according to claim 1, characterized in that: It also includes a structural frame, which is located between the inner curtain layer and the outer curtain layer, and the structural frame is detachably connected by a plurality of connecting rods.

3. The negative pressure screen for optical projection according to claim 1, characterized in that: The open opening of the acoustic cavity and the sound-permeable hole are connected by sealant.

4. The negative pressure screen for optical projection according to claim 1, characterized in that: A first clamping portion is provided at the open mouth of the sound cavity, and a second clamping portion is provided at the sound-permeable hole. The first clamping portion and the second clamping portion are clamped and connected, and the outside of the first clamping portion and the second clamping portion are both covered with a sealing layer.

5. The negative pressure screen for optical projection according to claim 1, characterized in that: The wall of the acoustic cavity facing outwards can open or close the acoustic cavity.

6. The negative pressure screen for optical projection according to claim 5, characterized in that: The inner wall surface of the sound cavity is provided with a sound insulation layer.

7. The negative pressure screen for optical projection according to claim 1, characterized in that: The outer structural layer further includes a matching portion, which is detachably connected to the acoustic cavity.

8. The negative pressure screen for optical projection according to claim 1, characterized in that: The outer structural layer is made of waterproof and corrosion-resistant material.

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