WO2021233444A1

WO2021233444A1 - Projection screen

Info

Publication number: WO2021233444A1
Application number: PCT/CN2021/095321
Authority: WO
Inventors: 李士杰; 苏晓磊; 王霖
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2020-05-22
Filing date: 2021-05-21
Publication date: 2021-11-25
Also published as: CN212255999U

Abstract

A projection screen (1), comprising a first fabric screen (10), a second fabric screen (20), and an adhesive tape (30). The first fabric screen (10) comprises a first sound-transmitting area (11) and a first bonding area (12) that are connected to each other; a plurality of first through holes (111) are provided in the first sound-transmitting area (11), and a plurality of first blind holes (121) are provided in the first bonding area (12); the second fabric screen (20) comprises a second sound-transmitting area (21) and a second bonding area (22) that are connected to each other; a plurality of second through holes (211) are provided in the second sound-transmitting area (21), and a plurality of second blind holes (221) are provided in the second bonding area (22); the second bonding area (22) is adjacent to the first bonding area (12); and the adhesive tape (30) is attached to the second adhesive area (22) and the first adhesive area (12) to connect the first fabric screen (10) and the second fabric screen (20). The provision of the plurality of first blind holes (121) in the first bonding area (12) and the plurality of second blind holes (221) in the second bonding area (22) of the projection screen enables the brightness of the projection screen (1) to be consistent, thus improving the display effect of the projection screen (1).

Description

Projection screen

Technical field

The utility model relates to the field of optical technology, in particular to a projection screen.

Background technique

In a theater setting, in order to obtain a surround sound effect, a number of speakers are usually placed behind the projection screen, so that the audience can hear sounds from different directions when watching the screen, and have an immersive experience. Traditional movie screens need to process sound-permeable holes on the screen to get a better sound-permeable effect. Because the size of movie screens is relatively large (for example, 50 square meters or more), it is very difficult to process sound-transmitting holes on a full-size movie screen. The sound-permeable sheets are spliced into a complete screen.

Existing movie screens on the market usually use screen splicing tape after splicing the gap, and bonding by UV glue/thermosetting glue, etc. This will cause the brightness of the splicing area to be higher than that of the surroundings, and periodic bright marks on the screen will be seen in the movie, and the display effect of the screen needs to be improved.

Utility model content

The purpose of the embodiments of the present invention is to provide a projection screen to solve the above-mentioned problems. The embodiments of the present invention achieve the above-mentioned objects through the following technical solutions.

The embodiment of the utility model provides a projection screen, which includes a first curtain, a second curtain and adhesive tape. The first curtain includes a connected first sound-transmitting area and a first bonding area, the first sound-transmitting area is provided with a plurality of first through holes, and the first bonding area is provided with a plurality of first blind holes; the second curtain includes a corresponding The second sound-permeable area is connected to the second bonding area, the second sound-permeable area is provided with a plurality of second through holes, the second bonding area is provided with a plurality of second blind holes, and the second bonding area is bonded to the first The areas are adjacent; the adhesive tape is attached to the second adhesive area and the first adhesive area to connect the first curtain and the second curtain.

In one embodiment, the opening ratio of the first bonding area is 95%-105% of the opening ratio of the first sound-transmitting area, and the opening ratio of the second bonding area is that of the second sound-transmitting area. The porosity is 95%-105%.

In one embodiment, the opening rates of the first bonding area, the first sound-transmitting area, the second bonding area, and the second sound-transmitting area are all 0.1%-10%.

In one embodiment, the opening rates of the first bonding area, the first sound-transmitting area, the second bonding area, and the second sound-transmitting area are the same.

In one embodiment, the aperture of the first blind hole is equal to the aperture of the second blind hole, the aperture of the first through hole is equal to the aperture of the second through hole, and the aperture of the first blind hole is smaller than the aperture of the first through hole.

In one embodiment, the distance between two adjacent first blind holes is equal to the distance between two adjacent second blind holes, and the distance between two adjacent first through holes is equal to the distance between two adjacent first through holes. The distance between the second through holes, the distance between two adjacent first blind holes is smaller than the distance between two adjacent first through holes, and the depth of the first blind hole is equal to the depth of the second blind hole.

In one embodiment, the first curtain includes a first outer surface and a first inner surface opposite to each other, the second curtain includes a second outer surface and a second inner surface opposite to each other, and the adhesive tape is attached to the first inner surface. Surface and second inner surface, a plurality of first blind holes are exposed on the first outer surface, a plurality of second blind holes are exposed on the second outer surface, the first outer surface and the second outer surface are coplanar, the first inner surface and The second inner surface is coplanar.

In one embodiment, the first curtain includes a first metal layer and a first base layer that are stacked, the first blind hole includes a metal perforated section and a base blind hole section, the metal perforated section penetrates the first metal layer, and the base blind hole The hole segment does not penetrate the first substrate layer, the aperture value of the metal perforation segment is a fixed value, the aperture value of the base blind hole segment is a variable value, and the aperture value of the metal perforation segment is smaller than the maximum aperture value of the base blind hole segment.

In one embodiment, there is a seam between the first curtain and the second curtain, the first bonding zone includes a first bending zone and a first flattening zone, and the second bonding zone includes a second bending zone and a first flat zone. Two flattening zones, the first bending zone and the second bending zone are located on both sides of the seam, and both protrude away from the adhesive tape. The opening rate of the first bending zone is less than that of the first flattening zone. The opening rate, the opening rate of the second bending zone is smaller than the opening rate of the second flat zone.

In one embodiment, the area of the first sound-transmitting zone is larger than the area of the first bonding zone, the area of the second sound-transmitting zone is larger than the area of the second bonding zone, and the area of the first bonding zone is equal to the area of the second bonding zone. The area of the junction area; a plurality of first blind holes are regularly arranged in the first bonding area, and a second blind hole is regularly arranged in the second bonding area; a plurality of first through holes are regularly arranged in the first sound-transmitting area, and a plurality of The second through holes are regularly arranged in the second sound-transmitting area

Compared with the prior art, the projection screen provided by the present invention realizes the consistent brightness of the projection screen by opening a plurality of first blind holes in the first bonding area and a plurality of second blind holes in the second bonding area. Improve the display effect of the projection screen.

These and other aspects of the present invention will be more concise and understandable in the description of the following embodiments.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a schematic view of the splicing of a projection screen provided by an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a projection screen provided by an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a projection screen provided by an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a projection screen provided by an implementation manner of an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a projection screen provided by another implementation of the embodiment of the present invention.

6 is a diagram of the corresponding relationship between the hole diameter and the number of holes when the first blind hole rate is 4% according to the embodiment of the present invention.

FIG. 7 is a schematic diagram of an opening method of the first through hole provided by the embodiment of the present invention.

FIG. 8 is a schematic diagram of another opening method of the first through hole provided by the embodiment of the present invention.

Detailed ways

In order to facilitate the understanding of the embodiments of the present invention, the embodiments of the present invention will be described in a more comprehensive manner with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the embodiments of the present invention herein are only for the purpose of describing specific implementations, and are not intended to limit the present invention.

The inventor of the present application found that in order to achieve sound transmission in traditional movie screens, some select porous fiber materials to obtain better sound transmission effects without additional perforation; or use PVC and other materials with better thermoplastic properties. First, make a sound hole, and then make a complete screen by heat welding. These screen materials can achieve better sound transmission effects, but when matched with a polarizing 3D projector, a metal reflective layer needs to be plated on the material, and the polarization maintaining effect is not very ideal.

To solve this problem, some materials with higher elastic modulus are used to make movie screens, such as

Selecting materials such as PET or PC, making microstructures on the surface of which the size changes far greater than the wavelength of the light, and then pattern-plating a metal film, so that the effect of maintaining the deflection of the light is good, and it is also beneficial to improve the brightness of the screen. However, the material of this technology is very dense, even if the thickness is very thin, the transmittance of high-frequency sound is not good, so it is necessary to process the sound-permeable holes on the screen. As shown in Figure 1, since the size of movie screens is relatively large (for example, 50 square meters or more), it is very difficult to process sound-transmitting holes on a full-size movie screen, so it is usually chosen to first on a sheet or a narrow and wide roll. Punch holes, and then splice the sheets with sound-through holes into a complete screen.

The embodiments and various implementations of the present utility model will be described in detail below with reference to the accompanying drawings.

Please refer to FIGS. 2 and 3, an embodiment of the present invention provides a projection screen 1, which includes a first curtain 10, a second curtain 20 and an adhesive tape 30. The first curtain 10 includes a first sound-transmitting area 11 and a first bonding area 12 that are connected. The first sound-transmitting area 11 is provided with a plurality of first through holes 111, and the first bonding area 12 is provided with a plurality of first blind holes. 121; The second curtain 20 includes a connected second sound-transmitting area 21 and a second bonding area 22, the second sound-transmitting area 21 is provided with a plurality of second through holes 211, and the second bonding area 22 is provided with a plurality of second Blind hole 221, the second bonding area 22 is adjacent to the first bonding area 12; the adhesive tape 30 is attached to the second bonding area 22 and the first bonding area 12 to connect the first curtain 10 and the second Curtain 20.

Specifically, the projection screen 1 in this embodiment can be a movie theater screen, which can be achieved by first processing the first curtain 10 and the second curtain 20, and then splicing the first curtain 10 and the second curtain 20 in a splicing manner. It may be bonded by the adhesive tape 30 in this embodiment. In other embodiments, the projection screen 1 may also include a third curtain, a fourth curtain, or more curtains, and multiple curtains may be bonded by an adhesive tape 30. There is a seam 40 between the first curtain 10 and the second curtain 20.

Please continue to refer to FIG. 3, the first curtain 10 includes a first outer surface 13 and a first inner surface 14 opposite to each other, and the second curtain 20 includes a second outer surface 23 and a second inner surface 24 opposite to each other. The first outer surface 13 and the second outer surface 23 are both display surfaces of the projection screen 1. The plurality of first blind holes 121 are opened in the direction from 13 to 14, that is, the plurality of first blind holes 121 are exposed on the first outer surface 13. The plurality of 221 are opened from the 23 to the 24 direction, that is, the plurality of 24 are exposed on the second outer surface 23. In this embodiment, the first outer surface 13 and the second outer surface 23 are coplanar, and the first inner surface 14 and the second inner surface 24 are coplanar, that is, the thickness of the first curtain 10 and the second curtain 20 are the same. , And the two are flush, which can eliminate the picture distortion caused by the unevenness of the display surface.

The adhesive tape 30 is attached to the first inner surface 14 and the second inner surface 24 to connect the first curtain 10 and the second curtain 20. In this embodiment, the adhesive tape 30 may be a common transparent tape. In other embodiments, the first curtain 10 and the second curtain 20 can also be connected by UV glue or thermosetting glue.

The projection screen 1 of this embodiment uses lasers to make uniformly arranged circular holes on the first curtain 10 and the second curtain 20 to increase the transmittance of high-frequency sound, and the transmittance and aperture rate of high-frequency sound. Related. The opening rate is defined as:

In the above equation, η represents the open porosity, B represents the number of pores, r represents the pore diameter, and D represents the area of the open area.

In this embodiment, the area of the first sound-transmitting zone 11 is larger than the area of the first bonding zone 12, the area of the second sound-transmitting zone 21 is larger than the area of the second bonding zone 22, and the area of the first bonding zone 12 It is equal to the area of the second bonding zone 22. The adhesive tape 30 is bonded between the first curtain 10 and the second curtain 20 and covers the seam 40.

The open porosity of the first bonding area 12 is defined as the first blind porosity, and the open porosity of the second bonding area 22 is defined as the second blind porosity. Among them, the first blind hole rate satisfies:

The second blind hole rate satisfies:

Among them, B1 is the number of first blind holes 121, r ₁ is the radius of the first blind holes 121, D _b1 is the area of the first bonding zone 12; B2 is the number of second blind holes 221, and r ₂ is the second The radius of the blind hole 221, D _b2 is the area of the second bonding zone 22. Specifically, r ₁ may refer to the average radius of the plurality of first blind holes 121 exposed on the first outer surface 13; r ₂ may refer to the average radius of the plurality of second blind holes 221 exposed on the second outer surface 23 .

In this embodiment, the first blind hole rate may be substantially equivalent to the second blind hole rate, for example, the first blind hole rate may be 95%-105% of the second blind hole rate. In this way, the brightness of the first bonding area 12 and the second bonding area 22 are consistent, and the display effect of the projection screen 1 is improved. Specifically, in this embodiment, both the first blind hole rate and the second blind hole rate may be between 0.1% and 10%.

In this embodiment, the plurality of first blind holes 121 may be regularly arranged in the first bonding area 12, and the plurality of second blind holes 221 may be regularly arranged in the second bonding area 22. The distance between two adjacent first blind holes 121 is equal to the distance between two adjacent second blind holes 221. As an example, the distance between two adjacent first blind holes 121 is 0.22 mm. In an embodiment, the plurality of first blind holes 121 may be arranged in the first bonding area 12 in a rectangular array, and the plurality of second blind holes 221 may also be arranged in the second bonding area 22 in a rectangular array. In other embodiments, the plurality of first blind holes 121 and the plurality of second blind holes 221 may also be regularly arranged in other ways.

Referring to FIGS. 2, 4, and 5, in other embodiments, the plurality of first blind holes 121 of the first bonding area 12 may also be arranged unevenly, that is, the density of the plurality of first blind holes 121 is not uniform distributed. Specifically, since the projection screen 1 is formed by splicing, in some splicing situations, the screens of the first bonding area 12 and the second bonding area 22 (splicing position) will be bent and deformed, and the first bonding area 12 and The second bonding area 22 at least partially protrudes away from the bonding tape 30. For example, bending and deformation caused by squeezing between two curtains will cause the main direction of the reflected light to be changed. At this time, viewers watching the movie from the front will feel that the brightness of the projection screen 1 becomes low. Therefore, the opening density is appropriately reduced, or the opening diameter is reduced, so as to reduce the duty ratio of the first blind hole 121 or the second blind hole 221.

Specifically, as shown in FIG. 4, in other embodiments, the first bonding area 12 includes a first bending area 123 and a first flattening area 125, and the second bonding area 22 includes a second bending area 223 and a first flattening area 125. The two flattening areas 225, the first bending area 123 and the second bending area 223 are respectively located on both sides of the seam 40, and all protrude in a direction away from the adhesive tape 30. At this time, the audience watching the movie from front will feel that the brightness of the first bending area 123 and the second bending area 223 is lower than that of other areas. Therefore, the aperture ratio of the first bending area 123 can be set to be smaller than that of the first bending area 123. The opening ratio of the flattening area 125 and the opening ratio of the second bending area 223 are set to be smaller than the opening ratio of the second flattening area 225. The first bending area 123 and the second bending area 223 may be regular areas or irregular areas.

As shown in Figure 5, when the entire first bonding area 12 and the entire second bonding area 22 are bent, and the curvatures of the bends are equal, the emitted light defining the first bonding area 12 is clamped with the viewing direction of the audience. The angle is θ, and the first blind hole rate η'needs to meet:

Where η is the size of the first blind hole ratio when the user's viewing angle is parallel to the emitted light. It can be understood that θ is an acute angle. It can be seen from the above formula that the greater the angle, the greater the first blind hole rate. In other words, along the direction away from the seam 40, the opening rate of the first curtain 10 gradually increases. It can be understood that in the direction away from the seam 40, the opening rate of the second curtain 20 also gradually increases.

In this embodiment, the aperture of the first blind hole 121 may be equal to the aperture of the second blind hole 221, and the aperture of the first blind hole 121 may be about 0.025 mm. As an example, the first blind hole rate is 4%, and the size of the first bonding area 12 is 1 m ² . According to the above formula, when the aperture of the first blind hole 121 is 0.1 mm, the number of the first blind hole 121 is about 1.27 million. When the aperture of the first blind hole 121 is 0.025 mm, the number of the first blind hole 121 is about 20 million. In other words, the number of holes is inversely proportional to the size of the corresponding hole, as shown in Figure 6. In this embodiment, the depth of the first blind hole 121 may be equal to the depth of the second blind hole 221. The hole can be opened by laser. As an example, a carbon dioxide laser can be used, working in radio frequency mode (above 100Hz), and the laser power is above 10W. The action time is set according to the actual situation, generally between 1 microsecond and 100 microseconds. between. By precisely controlling the spot of the laser beam, the laser light can be incident from the display surface of the projection screen 1, and only part of the surface layer material is removed without piercing the entire screen. This arrangement can prevent the glue (from the adhesive tape 30) of the first bonding area 12 and the second bonding area 22 from penetrating to the display surface, and will not affect the display of the projection screen 1.

The opening ratio of the first sound-transmitting area 11 is defined as the first through-hole ratio, and the opening ratio of the second sound-transmitting area 21 is defined as the second through-hole ratio. Among them, the first through hole ratio satisfies:

The second through hole ratio satisfies:

Among them, T1 is the number of first through holes 111, R ₁ is the radius of the first through holes 111, D _t1 is the area of the first sound-transmitting area 11; T2 is the number of second through holes 211, and R ₂ is the second The radius of the through hole 211, D _t2 is the area of the second sound-transmitting area 21. Specifically, R ₁ may refer to the average radius of the plurality of first through holes 111 exposed on the first outer surface 13; R ₂ may refer to the average radius of the plurality of second through holes 211 exposed on the second outer surface 23 .

In this embodiment, in this embodiment, the opening ratio of the first bonding area 12 is 95%-105% of the opening ratio of the first sound-transmitting area 11, and the opening ratio of the second bonding area 22 is It is 95%-105% of the opening rate of the second sound-transmitting zone 21. In other words, the values of the first through hole rate, the first blind hole rate, the second through hole rate, and the second blind hole rate are basically equivalent, and the difference is small. In this way, the brightness of the first bonding area 12, the second bonding area 22, the first sound-transmitting area 11, and the second sound-transmitting area 21 are basically the same, and the human eye cannot perceive the obvious difference in brightness, that is, everywhere in the projection screen 1. The brightness is the same, which improves the user’s viewing experience. Specifically, in this embodiment, the opening rates of the first bonding area 12, the first sound-transmitting area 11, the second bonding area 22, and the second sound-transmitting area 21 are all 0.1%-10%. As an example, the specific open porosity may be 0.3%-5%. In actual production, the appropriate opening rate can be selected according to the needs. In one embodiment, the opening rates of the first bonding area 12, the first sound-transmitting area 11, the second bonding area 22, and the second sound-transmitting area 21 may be the same.

In this embodiment, the aperture of the first through hole 111 is equal to the aperture of the second through hole 211, and the aperture of the first through hole 111 is larger than the aperture of the first blind hole 121. Wherein, “aperture” refers to the diameter of the hole exposed on the first outer surface 13 and the second outer surface 23. In this embodiment, the diameter of the first through hole 111 may be about 0.1 mm, which is approximately 4 times the diameter of the first blind hole 121. According to the foregoing formula, under the condition that the first through hole ratio is 4% and the size of the first sound-transmitting area 11 is 1 m ² , the number of first through holes 111 is about 1.27 million, which is roughly the first blind hole 121 1/16 of the number. The first through hole 111 can be opened by a laser, and a carbon dioxide laser or a solid-state laser can be used.

In this embodiment, the plurality of first through holes 111 may be regularly arranged in the first sound-transmitting area 11, and the plurality of second through holes 211 may be regularly arranged in the second sound-transmitting area 21. The distance between two adjacent first through holes 111 may be equal to the distance between two adjacent second through holes 211. In an embodiment, the plurality of first through holes 111 may be arranged in a rectangular array in the first sound-transmitting area 11, and the plurality of second through holes 211 may also be arranged in a rectangular array in the second sound-transmitting area 21. The distance between two adjacent first through holes 111 is greater than the distance between two adjacent first blind holes 121. As an example, the distance between two adjacent first through holes 111 is 0.89 mm, which is roughly four times the distance between two adjacent first blind holes 121. In other embodiments, the plurality of first through holes 111 and the plurality of second through holes 211 may also be regularly arranged in other ways.

Referring to FIGS. 7 and 8, from the perspective of the thickness direction of the projection screen 1, the first screen 10 includes a first metal layer 15 and a first base layer 16 that are stacked, and the first metal layer 15 has a first outer surface 13. The first base layer 16 has a first inner surface 14. In this embodiment, the material of the first base layer 16 is PET (Polyethylene terephthalate, polyethylene terephthalate), and the elastic modulus of the PET material is relatively high. The first metal layer 15 can be plated by coating. Covering the first base layer 16, by disposing the first metal layer 15 on the first base layer 16, the projection screen 1 has a good effect of maintaining light deflection, and it is also beneficial to improve the brightness of the projection screen 1.

It should be noted that due to the different thermal conductivity of metals and non-metals, when the laser is drilled, it is incident from the first outer surface 13 (first metal layer 15) and from the first inner surface 14 (first base layer 16). When incident, the cross-sectional shape of the hole is different. Due to the difference in thermal conductivity, the first base layer 16 is larger than the laser spot area, and will also melt due to the temperature exceeding the glass transition temperature Tg, so the opening will be larger than the spot area. Specifically, in this embodiment, the first blind hole 121 and the first through hole 111 may both be formed by laser processing. The first blind hole 121 includes a metal perforated section 1211 and a base blind hole section 1212. The first through hole 111 has The metal through hole section 1113 and the base through hole section 1115, the metal perforated section 1211 and the metal through hole section 1113 all penetrate the first metal layer 15, the base blind hole section 1212 does not penetrate the first base layer 16, the base through hole section 1115 Penetrate the first base layer 16. The aperture value of the metal perforated section 1211 is a fixed value, the aperture value of the base blind hole section 1212 is a variable value, and the aperture value of the metal perforated section 1211 is smaller than the maximum aperture value of the base blind hole section 1212; the aperture value of the metal through hole section 1113 is With a constant value, the aperture value of the substrate through hole section 1115 is a variable value, and the aperture value of the substrate through hole section 1115 gradually increases along the direction away from the metal through hole section 1113. In other embodiments, the first through hole may also be formed by mechanical drilling, and the aperture value of the base through hole section 1115 may also be a fixed value, and the size is equal to the aperture value of the metal through hole section 1113.

Those skilled in the art can understand that the change of the aperture value of the second blind hole 221 is consistent with the change of the aperture value of the first blind hole 121, and the change of the aperture value of the second through hole 211 is consistent with the change of the aperture value of the first through hole 111. No longer describe.

In one embodiment, when calculating the aperture ratio, r ₁ may refer to the average radius of the plurality of first blind holes 121 exposed to 13. Of course, those skilled in the art can understand that, in other embodiments, the r ₁ may also have other statistical methods, such as randomly selecting a 1 cm ² area on the first bonding area 12, and all the first blind areas in the area The average radius of the hole 121 is taken as r ₁ , or the first bonding area 12 is divided into multiple areas, a first blind hole 121 is randomly selected in each area, and then the average radius of the multiple first blind holes 121 is taken as r ₁ .

Those skilled in the art can understand that, in other embodiments, the plurality of first blind holes 121 may also have other arrangements, for example, they are arranged in a linear array in the first bonding area 12 in a direction parallel to the seam 40, and are arranged along the In the direction away from the seam 40, the distance between two adjacent first blind holes 121 is smaller.

When making the projection screen 1 of this technical solution, it can be made through the following steps:

1. Finish the processing of the first curtain 10 and the second curtain 20 after surface structure processing, coating and hole-opening processes. The hole-opening process of the first curtain 10 includes opening a plurality of first blind holes in the first bonding area 12 121. Open a plurality of first through holes 111 in the first sound-transmitting area 11; the hole-opening process of the second curtain 20 includes opening a plurality of second blind holes 221 in the second bonding area 22, and in the second sound-transmitting area 21 A plurality of second through holes 211 are opened.

2. Align the first bonding area 12 of the first curtain 10 and the second bonding area 22 of the second curtain 20 close to each other, on the first inner surface 14 and the second bonding area corresponding to the first bonding area 12 Adhesive tape 30 is pasted on the second inner surface 24 corresponding to 22 to fix the first curtain 10 and the second curtain 20 to complete the production of the projection screen 1.

In summary, the projection screen 1 provided by the present invention realizes the projection screen 1 by opening a plurality of first blind holes 121 in the first bonding area 12 and a plurality of second blind holes 221 in the second bonding area 22. The consistent brightness improves the display effect of the projection screen 1.

The above-mentioned embodiments only express several implementation modes of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the utility model, several modifications and improvements can be made, and these all fall within the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be subject to the appended claims.

Claims

A projection screen, characterized in that it comprises:

The first curtain includes a first sound-transmitting area and a first bonding area that are connected, wherein the first sound-transmitting area is provided with a plurality of first through holes, and the first bonding area is provided with a plurality of first blind holes;

The second curtain includes a connected second sound-permeable area and a second bonding area, the second sound-permeable area is provided with a plurality of second through holes, and the second bonding area is provided with a plurality of second blind holes, The second bonding zone is adjacent to the first bonding zone; and

An adhesive tape is attached to the second adhesive area and the first adhesive area to connect the first curtain and the second curtain.
The projection screen according to claim 1, wherein the opening rate of the first bonding area is 95%-105% of the opening rate of the first sound-transmitting area, and the second bonding area The opening rate of the zone is 95%-105% of the opening rate of the second sound-transmitting zone.
The projection screen according to claim 1, wherein the opening rates of the first bonding area, the first sound-transmitting area, the second bonding area, and the second sound-transmitting area are all It is 0.1%-10%.
The projection screen according to claim 1, wherein the opening rates of the first bonding area, the first sound-transmitting area, the second bonding area, and the second sound-transmitting area are the same .
The projection screen according to claim 1, wherein the aperture of the first blind hole is equal to the aperture of the second blind hole, and the aperture of the first through hole is equal to the aperture of the second through hole, The aperture of the first blind hole is smaller than the aperture of the first through hole.
The projection screen according to claim 1, wherein the distance between two adjacent first blind holes is equal to the distance between two adjacent second blind holes, and two adjacent second blind holes are The distance between the first through holes is equal to the distance between two adjacent second through holes, and the distance between two adjacent first blind holes is smaller than the distance between two adjacent first through holes The depth of the first blind hole is equal to the depth of the second blind hole.
The projection screen according to claim 1, wherein the first screen includes a first outer surface and a first inner surface opposite to each other, and the second screen includes a second outer surface and a second inner surface opposite to each other. Surface, the adhesive tape is attached to the first inner surface and the second inner surface, the plurality of first blind holes are exposed on the first outer surface, and the plurality of second blind holes are exposed On the second outer surface, the first outer surface and the second outer surface are coplanar, and the first inner surface and the second inner surface are coplanar.
The projection screen according to claim 1, wherein the first screen includes a first metal layer and a first base layer that are stacked, and the first blind hole includes a metal perforated section and a base blind hole section. The metal perforated section penetrates the first metal layer, the base blind hole section does not penetrate the first base layer, the aperture value of the metal perforated section is a fixed value, and the aperture value of the base blind hole section is Is a variable value, and the aperture value of the metal perforated section is smaller than the maximum aperture value of the blind hole section of the substrate.
The projection screen according to claim 1, wherein there are seams between the first curtain and the second curtain, and the first bonding area includes a first bending area and a first flat area, The second bonding zone includes a second bending zone and a second flattening zone. The first bending zone and the second bending zone are respectively located on both sides of the seam, and are both far away from the seam. The direction of the adhesive tape is convex, the opening rate of the first bending zone is less than the opening rate of the first flattening zone, and the opening rate of the second bending zone is less than that of the second flattening zone. F.
The projection screen of claim 1, wherein the area of the first sound-transmitting area is larger than that of the first bonding area, and the area of the second sound-transmitting area is larger than that of the second bonding area. The area of the first bonding area is equal to the area of the second bonding area; the plurality of first blind holes are regularly arranged in the first bonding area, and the second blind holes are regular Are arranged in the second bonding area; the plurality of first through holes are regularly arranged in the first sound-transmitting area, and the plurality of second through holes are regularly arranged in the second sound-transmitting area.