CN210639415U - Sound transmission screen - Google Patents
Sound transmission screen Download PDFInfo
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- CN210639415U CN210639415U CN201921170704.8U CN201921170704U CN210639415U CN 210639415 U CN210639415 U CN 210639415U CN 201921170704 U CN201921170704 U CN 201921170704U CN 210639415 U CN210639415 U CN 210639415U
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- sound
- transmitting
- transparent
- hole
- screen
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
Abstract
The utility model provides an acoustic transmission curtain, acoustic transmission curtain contains the acoustic transmission curtain substrate and sets up the one or more than one acoustic through-hole on the acoustic transmission curtain substrate, the acoustic through-hole is in the line direction of position on the acoustic transmission curtain substrate and an at least sound source with the acoustic through-hole is in extending direction in the acoustic transmission curtain substrate is unanimous. The utility model discloses because the line direction of the position of the sound-transparent through-hole on the sound-transparent curtain substrate and an at least sound source is unanimous with the extending direction of sound-transparent through-hole in the sound-transparent curtain substrate, the axis direction that makes the sound-transparent through-hole is unanimous with sound propagation direction, is favorable to sound to pass the sound-transparent curtain, under the condition that does not change the sound-transparent curtain and sees the shadow face perforation rate, has improved sound-transparent effect and picture effect, has optimized user's sight shadow and has experienced.
Description
Technical Field
The utility model relates to an acoustic screen belongs to projection screen and makes technical field.
Background
The perfect integration of sound and pictures is the continuous pursuit of the movie industry for hundreds of years, in order to ensure the perfect integration of images and sound, the optimal placement position of a sound box is behind a screen, and the sound-transmitting screen is the standard preparation of a cinema, so that the real sound can be restored to the maximum extent. The prior sound transmission screen mainly comprises a perforated screen and a woven screen, wherein the woven screen has low sound transmission screen gain and poor polarization maintaining performance, and the perforated screen has the advantages of high gain, high polarization maintaining performance and the like.
Patent document CN 201853063U discloses an acoustically transparent projection screen, which has cylindrical through holes with a diameter of 0.2mm-1.5mm uniformly formed on the projection screen. Patent document US009530397B2 discloses a perforated sound-transmitting screen, which is provided with a plurality of truncated cone-shaped through holes.
The shape of the sound-permeable through hole on the curtain that punches among the prior art is single, if be cylindrical or round platform shape, its sound that can make the audio amplifier send passes through the screen, however the relative position of audio amplifier and the curtain that punches is not considered in setting up of sound-permeable through hole, also does not consider the direction of propagation of sound wave, and the curtain that punches of above-mentioned structure can make the sound wave produce the diffraction to produce mole stripe, influence sound and picture effect, sound-permeable effect is relatively poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough to prior art provides an acoustically transparent curtain, makes the axis direction of acoustically transparent through-hole unanimous with sound propagation direction, is favorable to sound to pass acoustically transparent curtain, under the condition that does not change acoustically transparent curtain and sees the shadow face perforation rate, has improved acoustically transparent effect and picture effect, has optimized user's sight shadow and has experienced.
The utility model discloses the technical problem that solve is realized through following technical scheme:
the utility model provides an acoustic transmission curtain, acoustic transmission curtain contains the acoustic transmission curtain substrate and sets up the one or more than one acoustic through-hole on the acoustic transmission curtain substrate, the acoustic through-hole is in the line direction of position on the acoustic transmission curtain substrate and an at least sound source with the acoustic through-hole is in extending direction in the acoustic transmission curtain substrate is unanimous.
Preferably, the material of the sound-transmitting screen substrate is polyvinyl chloride, polycarbonate or polyethylene terephthalate.
In order to obtain a good image quality effect, the through hole rate of the sound-transmitting screen is 0.1-10%.
In order to ensure the quality of a projection picture, the aperture of the sound-transmitting through hole is 0.05 mm-1.5 mm.
Preferably, the sound-transmitting through holes are arranged regularly or randomly.
Preferably, the regular arrangement comprises a matrix arrangement, an equilateral triangle arrangement or a ring arrangement.
In order to facilitate processing and production, the sound-transmitting through hole is obtained by laser perforation.
In order to make the film viewer have good film viewing experience, the sound-transmitting screen base material is divided into two or more areas corresponding to two or more sound sources, and the sound-transmitting through holes in at least one area are set as follows: the position of the sound-transmitting through hole in the region on the sound-transmitting screen base material coincides with the direction of the line connecting the sound source corresponding to the region and the extending direction of the sound-transmitting through hole in the sound-transmitting screen base material.
To sum up, the utility model discloses because the line direction of the position of the sound-transparent through-hole on the sound-transparent curtain substrate and an at least sound source is unanimous with the extending direction of sound-transparent through-hole in the sound-transparent curtain substrate, the axis direction that makes the sound-transparent through-hole is unanimous with the sound propagation direction, is favorable to sound to pass the sound-transparent curtain, under the condition that does not change the sound-transparent curtain and sees shadow face perforation rate, has improved sound-transparent effect and picture effect, has optimized user's sight shadow and has experienced.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic plan view of the sound-transmitting screen of the present invention;
fig. 2 is a cross-sectional view of the sound-permeable screen of the present invention;
FIG. 3 is a schematic view of the sound-transmitting screen during punching when three sound sources are used in the present invention;
fig. 4 is a cross-sectional view of comparative example one of the present invention;
fig. 5 is a cross-sectional view of a second comparative example of the present invention;
fig. 6 is a schematic diagram of sound wave attenuation of the first embodiment and the comparative embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic plan view of the sound-transmitting screen of the present invention; fig. 2 is a cross-sectional view of the sound-transmitting curtain of the present invention. As shown in fig. 1 and 2, the present invention provides an acoustic screen comprising an acoustic screen substrate 100 and one or more acoustic through holes 200 disposed on the acoustic screen substrate 100.
The material of sound-transmitting screen substrate 100 is polyvinyl chloride (PVC), Polycarbonate (PC) or polyethylene glycol terephthalate (PET), sound-transmitting through-hole 200 is the through-hole of setting on sound-transmitting screen substrate 100, places sound source 300 (like the stereo set) one side of sound-transmitting screen, and the sound that sends from stereo set sound source 300 can reach the opposite side of sound-transmitting screen after passing sound-transmitting through-hole 200.
In order to optimize the utility model discloses the sound transmission effect of sound transmission curtain the utility model discloses in, sound transmission through-hole 200 is set up to: the position of the sound-transmitting through-hole 200 on the sound-transmitting screen base material 100 coincides with the direction of the line connecting at least one sound source 300 and the extending direction of the sound-transmitting through-hole 200 in the sound-transmitting screen base material 100.
The reason why the conventional sound-transmitting curtain causes sound wave diffraction is that when the sound wave encounters an obstacle in the sound wave propagation process, part of the sound wave winds around the back of the obstacle and continues to propagate forward, and the axial direction of the sound-transmitting curtain through hole (the extending direction of the sound-transmitting through hole in the sound-transmitting curtain base material) is different from the sound propagation direction in the prior art, so that diffraction occurs. And the utility model discloses a will sound-transparent through-hole 200 sets up to sound-transparent through-hole 200 is in position on the sound-transparent curtain substrate 100 with the line direction of an at least sound source 300 with sound-transparent through-hole 200 is in extending direction in the sound-transparent curtain substrate 100 is unanimous for the axial of different sound-transparent through-holes is unanimous with the corresponding sound direction that the sound source sent, consequently can alleviate diffraction phenomenon to a certain extent, has improved the sound-transparent effect.
The arrangement of the sound-transmitting through holes 200 on the sound-transmitting screen substrate 100 may be regular or random. For example, the sound-transmitting through-holes 200 may be arranged in a matrix, i.e., adjacent sound-transmitting through-holes 200 form a rectangle; or, the sound-transmitting through holes 200 are arranged in an equilateral triangle, that is, the sound-transmitting through holes 200 are arranged in rows, the sound-transmitting through holes 200 in each row are uniformly arranged, and three adjacent sound-transmitting through holes 200 in two adjacent rows form an equilateral triangle; or, the sound-transmitting through holes 200 are annularly arranged, that is, a plurality of sound-transmitting through holes form a plurality of circular rings; alternatively, the acoustically transparent through-holes 200 are randomly distributed on the acoustically transparent screen substrate 100.
Since the connecting direction of the sound-transmitting through-hole 200 on the sound-transmitting screen substrate 100 is the same as the extending direction of the sound-transmitting through-hole 200 in the sound-transmitting screen substrate 100, that is, most of the axes of the sound-transmitting through-hole are not parallel to the horizontal line, when a picture is projected on the sound-transmitting screen, even if a pixel of the image falls on the sound-transmitting through-hole, the pixel will not pass through the sound-transmitting through-hole, and therefore, most of the viewers can see the image with better image quality from the viewing side.
But it should be noted that: the aperture of the sound-transmitting through-hole 200 is 0.05mm to 1.5mm, preferably 0.1 to 0.5mm, in order to ensure the quality of the projection picture, because the aperture is too large, the pixels of the partial image may be lost or distorted.
The area that defines the through-hole rate to be all sound-transparent through-holes and the ratio of sound-transparent curtain total area, generally speaking, the through-hole rate of sound-transparent through-hole is the bigger, and the sound transmission effect is better, and when the through-hole rate was too big, the reflectivity of sound-transparent curtain reduced for the image quality effect is relatively poor, consequently, the utility model discloses well through-hole rate is 0.1% ~ 10%, preferably 0.5% ~ 5%.
The utility model discloses do not restrict the mode or the shaping mode of punching of sound-transparent through-hole 200, it can also adopt the laser perforation mode through the mode that machinery punched a hole. For example, when the sound-transmitting through-hole 200 is processed by laser perforation, the laser generator may be placed at the position of the sound source 300 used in cooperation with the sound-transmitting curtain, and then the arrangement of the sound-transmitting through-holes 200 is selected according to actual needs, so as to change the direction of the laser emitted by the laser generator, and form the sound-transmitting through-hole 200 at the appropriate position of the sound-transmitting curtain substrate 100. When mechanical punching is adopted, a plurality of sound-transmitting through holes 200 may be simultaneously processed on the sound-transmitting screen base material 100 by a customized die, or a plurality of sound-transmitting through holes 200 may be processed one by one on the sound-transmitting screen base material 100 after the punching direction of the male die is set.
Additionally, in existing theaters, the number of sound sources 300 used in conjunction with the sound-transparent curtains is often greater than one in order to provide good viewing experience for the viewers.
For example, three sound sources 300 are used in combination with one sound-transmitting screen, and the three sound sources 300 are sequentially and uniformly arranged behind the sound-transmitting screen along the transverse direction (horizontal direction). Fig. 3 is a schematic diagram of the sound-transmitting curtain during punching in the case of three sound sources, as shown in fig. 3, at this time, in order to optimize the sound-transmitting effect of the sound-transmitting curtain, when the sound-transmitting curtain is prepared, the sound-transmitting curtain substrate 100 needs to be divided into three regions along the transverse direction according to the arrangement mode of the sound sources 300, and three laser generating devices are respectively placed at the positions of the three sound sources 300, and each laser generating device respectively processes the sound-transmitting through holes 200 in the corresponding region; or one laser generating device is placed at the position of one sound source 300, and after the sound-transmitting through holes 200 of the corresponding area are processed, the position of the laser generating device is moved, so that the proper sound-transmitting through holes 200 are processed in the three areas.
The number of the sound sources 300 may be four, which are arranged in a rectangular shape and placed behind the sound-transmitting curtain. At this time, when the sound-transmitting curtain is prepared, laser generating devices are required to be placed at different positions of the sound source 300, respectively, so that the appropriate sound-transmitting through holes 200 are processed in the four regions.
The present invention does not limit the number of the sound sources 300, and those skilled in the art can adjust the number according to actual needs. In other words, in the present invention, the sound-transmitting screen base material 100 is divided into two or more regions corresponding to two or more sound sources 300, and the sound-transmitting through-holes 200 in at least one region are provided as follows: the position of the sound-transmitting through-hole 200 in the area on the sound-transmitting screen substrate 100 coincides with the direction of the line connecting the sound sources 300 corresponding to the area and the direction in which the sound-transmitting through-hole 200 extends in the sound-transmitting screen substrate 100.
The following describes the sound transmission effect of the sound transmission curtain of the present invention with reference to specific examples and comparative examples.
Example one
In this embodiment, the size of the sound-transmitting screen is 1.5m by 1.5m, and the diameter d of the sound-transmitting through-hole 20010.5mm, a plurality of sound-transmitting through-holes 200 arranged in a matrix, and a distance a between adjacent sound-transmitting through-holes 20012.5mm, the through-hole rate is 0.5%, the forming mode of the sound-transmitting through-hole 200 is a laser perforation mode, and the parameters of the sound-transmitting screen, such as material, thickness and the like, can be designed and selected by those skilled in the art according to actual needs, and can also be the same as the sound-transmitting screen in the prior art, and are not described herein again.
In this embodiment, the number of the sound sources 300 used in cooperation with the sound-transmitting screen is one, and the direction of the line connecting the position of the sound-transmitting through hole 200 on the sound-transmitting screen base material 100 to the sound source 300 coincides with the extending direction of the sound-transmitting through hole 200 in the sound-transmitting screen base material 100.
Comparative example 1
Fig. 4 is a cross-sectional view of comparative example i of the present invention. As shown in fig. 4, in comparative example one, the size of the sound-transmitting curtain is 1.5m by 1.5m, and the diameter d of the sound-transmitting through-hole 1220.5mm, a plurality of sound-transmitting through holes 12 arranged in a matrix, and a distance a between adjacent sound-transmitting through holes 1222.5mm, and the forming mode of the sound-transmitting through hole 12 is a mechanical punching mode.
In this comparative example, the axis of the sound-transmitting through-hole 12 is perpendicular to the plane of the sound-transmitting screen substrate 11, and the sound-transmitting through-hole 12 is a cylindrical through-hole.
Comparative example No. two
FIG. 5 is a sectional view of comparative example II of the present inventionFigure (a). As shown in fig. 5, in the comparative example, the size of the sound-transmitting curtain was 1.5m by 1.5m, and the diameter d at the center of the sound-transmitting through-hole 2230.5mm, a plurality of sound-transmitting through holes 22 are arranged in a matrix, and the distance a between adjacent sound-transmitting through holes 2232.5mm, and the sound-transmitting through-hole 22 is formed by laser perforation.
In this comparative example, the axis of the sound-transmitting through-hole 22 is perpendicular to the plane of the sound-transmitting screen base material 21, and the sound-transmitting through-hole 22 is a truncated cone-shaped through-hole.
And (3) carrying out sound transmission performance tests on the three sound transmission screens in the anechoic chamber, wherein sound waves of 200Hz-20000Hz pass through the three sound transmission screens, and the attenuation of sound waves of different frequencies after passing through the sound transmission screens is tested.
Fig. 6 is a schematic diagram of sound wave attenuation of the first embodiment and the comparative embodiment of the present invention. As shown in fig. 6, the sound attenuation of the cylindrical sound-transmitting through hole machined by mechanical punching in the comparative example is the most serious, and the sound transmission performance of the sound-transmitting through hole in this example is the best.
To sum up, the utility model discloses because the line direction of the position of the sound-transparent through-hole on the sound-transparent curtain substrate and an at least sound source is unanimous with the extending direction of sound-transparent through-hole in the sound-transparent curtain substrate, the axis direction that makes the sound-transparent through-hole is unanimous with the sound propagation direction, is favorable to sound to pass the sound-transparent curtain, under the condition that does not change the sound-transparent curtain and sees shadow face perforation rate, has improved sound-transparent effect and picture effect, has optimized user's sight shadow and has experienced.
Claims (8)
1. An acoustically transparent screen comprising an acoustically transparent screen substrate and one or more acoustically transparent through holes provided in the acoustically transparent screen substrate, wherein the acoustically transparent through holes are located on the acoustically transparent screen substrate such that the direction of the line connecting the position of the acoustically transparent through holes to at least one sound source is the same as the direction of extension of the acoustically transparent through holes in the acoustically transparent screen substrate.
2. The sound-transmitting screen of claim 1 wherein the sound-transmitting screen substrate is polyvinyl chloride, polycarbonate or polyethylene terephthalate.
3. The sound-transmitting screen of claim 1 having a through porosity of 0.1% to 10%.
4. The sound-transparent screen of claim 3, wherein the apertures of the sound-transparent through-holes are 0.05mm to 1.5 mm.
5. The sound-transparent screen of claim 4, wherein the sound-transparent through-holes are arranged regularly or randomly.
6. The sound-transparent screen of claim 5, wherein the regular arrangement comprises a matrix arrangement, an equilateral triangle arrangement, or a circular arrangement.
7. The sound-transparent screen of claim 1, wherein the sound-transparent through-holes are laser-drilled sound-transparent through-holes.
8. The sound-transmitting screen of any one of claims 1-7, wherein the screen substrate is divided into two or more zones corresponding to two or more sound sources, the sound-transmitting through-holes in at least one zone being arranged to: the position of the sound-transmitting through hole in the region on the sound-transmitting screen base material coincides with the direction of the line connecting the sound source corresponding to the region and the extending direction of the sound-transmitting through hole in the sound-transmitting screen base material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921170704.8U CN210639415U (en) | 2019-07-24 | 2019-07-24 | Sound transmission screen |
| PCT/CN2020/103550 WO2021013184A1 (en) | 2019-07-24 | 2020-07-22 | Sound-transmitting screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921170704.8U CN210639415U (en) | 2019-07-24 | 2019-07-24 | Sound transmission screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210639415U true CN210639415U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921170704.8U Active CN210639415U (en) | 2019-07-24 | 2019-07-24 | Sound transmission screen |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN210639415U (en) |
| WO (1) | WO2021013184A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013184A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳光峰科技股份有限公司 | Sound-transmitting screen |
| JP7447353B2 (en) | 2020-08-12 | 2024-03-11 | ドルビー ラボラトリーズ ライセンシング コーポレイション | Reduced moiré due to controlled perforation locations |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007322771A (en) * | 2006-06-01 | 2007-12-13 | Osm:Kk | Self-supporting lift screen |
| CN201853063U (en) * | 2010-11-06 | 2011-06-01 | 浙江宇立塑胶有限公司 | Acoustical transmission projection curtain |
| CN204832755U (en) * | 2015-07-31 | 2015-12-02 | 马鞍山星球银幕科技有限公司 | Screen entrant sound hole |
| CN105700284A (en) * | 2016-04-27 | 2016-06-22 | 江苏卡罗卡国际动漫城有限公司 | Soft 3D (three-dimensional) projection screen |
| CN206057783U (en) * | 2016-08-10 | 2017-03-29 | 南京卡本科技有限公司 | A kind of projection screen plate |
| CN107222798B (en) * | 2017-07-19 | 2023-08-25 | 歌尔科技有限公司 | Intelligent sound box display device |
| CN208044292U (en) * | 2018-02-08 | 2018-11-02 | 深圳市光峰光电技术有限公司 | Projection screen |
| CN210639415U (en) * | 2019-07-24 | 2020-05-29 | 深圳光峰科技股份有限公司 | Sound transmission screen |
-
2019
- 2019-07-24 CN CN201921170704.8U patent/CN210639415U/en active Active
-
2020
- 2020-07-22 WO PCT/CN2020/103550 patent/WO2021013184A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021013184A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳光峰科技股份有限公司 | Sound-transmitting screen |
| JP7447353B2 (en) | 2020-08-12 | 2024-03-11 | ドルビー ラボラトリーズ ライセンシング コーポレイション | Reduced moiré due to controlled perforation locations |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021013184A1 (en) | 2021-01-28 |
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