WO2020253447A1 - 投影屏幕、投影系统及投影屏幕的装配方法 - Google Patents

投影屏幕、投影系统及投影屏幕的装配方法 Download PDF

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Publication number
WO2020253447A1
WO2020253447A1 PCT/CN2020/090941 CN2020090941W WO2020253447A1 WO 2020253447 A1 WO2020253447 A1 WO 2020253447A1 CN 2020090941 W CN2020090941 W CN 2020090941W WO 2020253447 A1 WO2020253447 A1 WO 2020253447A1
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WO
WIPO (PCT)
Prior art keywords
screen
projection
woven cloth
woven fabric
woven
Prior art date
Application number
PCT/CN2020/090941
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English (en)
French (fr)
Inventor
戴洁
邢哲
Original Assignee
青岛海信激光显示股份有限公司
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Publication date
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Publication of WO2020253447A1 publication Critical patent/WO2020253447A1/zh
Priority to US17/491,463 priority Critical patent/US11782336B2/en

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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
    • 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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/602—Lenticular screens
    • 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
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
    • 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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • 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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • 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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • G03B21/625—Lenticular translucent screens

Definitions

  • This application relates to the field of projection display, in particular to a projection screen, a projection system and a projection screen assembly method.
  • projection screens of projection display systems usually include different types such as soft screens and hard screens.
  • hard screens have been widely used because of their good optical gain uniformity, color reproduction and flatness, and better display effects.
  • a back-plate fixing structure is usually used to fix the hard screen. Fix it.
  • Fig. 1 is a schematic structural diagram of a back-plate type fixing structure in the related art.
  • the back plate type fixing structure includes a decorative frame 201 and a flat back support plate 204.
  • the hard screen 202 and the back support plate 204 are fixed together by an adhesive 203, and then the decorative frame 201 It is connected to the back support plate 204 to complete the support and fixation of the hard screen 202.
  • the rigidity of the back support plate 204 can be used to maintain the flatness of the hard screen 202 and prevent the hard screen 202 from being deformed.
  • This application provides a projection screen, which includes a hard screen panel, a soft woven cloth, an adhesive layer, a screen frame surrounding the screen panel and a plurality of elastic connectors; the front of the screen panel is the projection light receiver The back side of the screen board is attached to the woven cloth through the adhesive layer. The woven cloth covers the area on the back of the screen board corresponding to the front light-receiving area, and the edge of the woven cloth is outside the edge range of the screen board.
  • Each elastic connector The first end is connected with the edge of the woven cloth, and the second end is connected with the screen frame, so that the woven cloth and the screen board are stretched to a flat state by the tension of the elastic connecting member.
  • the present application provides a projection system, including a projection device and the projection screen as described above, and the projection device is used to project a projection image onto a screen plate of the projection screen.
  • the present application provides a method for assembling the above-mentioned projection screen, including: pasting an adhesive layer with release paper on the woven cloth, the release paper being located on the side of the adhesive layer away from the woven cloth; Remove the release paper to expose the adhesive layer, and attach the screen plate to the surface of the adhesive layer; stretch the woven cloth to a flat state.
  • Fig. 1 is a schematic structural diagram of a back-plate fixing structure in the related art
  • FIG. 2 is a schematic structural diagram of a projection screen provided in Embodiment 1 of the present application.
  • FIG. 3 is a schematic cross-sectional view of a projection screen provided in Embodiment 1 of the present application.
  • FIG. 4 is a schematic diagram of the structure of the woven cloth in the projection screen provided in the first embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of another woven fabric in the projection screen provided in Embodiment 1 of the present application.
  • FIG. 6 is a schematic structural diagram of still another woven fabric in the projection screen provided in Embodiment 1 of the present application.
  • FIG. 7 is a schematic structural diagram of the connection relationship between the screen plate, the adhesive layer, and the woven cloth in the projection screen provided in the first embodiment of the present application;
  • FIG. 8 is a schematic flowchart of a method for assembling a projection screen provided in Embodiment 3 of the present application.
  • FIG. 2 is a schematic structural diagram of a projection screen provided in Embodiment 1 of the present application.
  • FIG. 3 is a schematic cross-sectional view of a projection screen provided in Embodiment 1 of the present application.
  • FIG. 7 is a schematic structural diagram of the connection relationship between the screen plate, the adhesive layer, and the woven cloth in the projection screen provided in the first embodiment of the present application.
  • the projection screen provided by this embodiment specifically includes a hard screen panel 1, a soft woven cloth 2, an adhesive layer 5, and a surrounding side of the screen panel 1.
  • the area corresponding to the light-receiving area, and the edge of the woven cloth 2 is outside the edge range of the screen plate 1, the first end of each elastic connector 4 is connected to the edge of the woven cloth 2, and the second end is connected to the screen frame 3.
  • the woven fabric 2 and the screen board 1 are stretched to a flat state by the tensile force of the elastic connecting member 4.
  • the screen panel 1 in the projection screen is usually made of hard materials, and has greater rigidity and strength. Therefore, when the screen panel 1 is stretched, it can form a relatively flat surface. In this way, at least a part of the area of the front surface of the screen panel 1 can be used as a light-receiving area for projecting images, so that pictures and images can be projected on the front surface of the screen panel 1 for display.
  • the projection screen in this embodiment also includes a soft woven cloth 2.
  • the woven cloth 2 can be adhered to the hard screen plate 1 through an adhesive layer 5, and Other fixing structures are connected to complete the fixing of the screen board 1.
  • the woven fabric 2 and the screen panel 1 are adhered to each other through the adhesive layer 5, so the stretching degree of the woven fabric 2 will also affect the curling or unfolding of the screen panel 1 through the adhesive layer 5.
  • the woven fabric 2 has a sufficient size to cover at least the area on the back of the screen plate 1 opposite to the front light receiving area. At this time, the back surface of the light-receiving area is all bonded to the woven fabric 2. In this way, when the woven fabric 2 is in a flat and stretched state, the light-receiving area on the screen panel 1 for projecting images will also be stretched, thereby achieving a better picture display quality.
  • Adhesive layer 5 is a sticky layer, mainly used to bond the woven cloth 2 and the screen plate 1, so generally you can choose a sticky material, such as a substrate-free adhesive film, etc.
  • the adhesive layer 5 is set on the screen Therefore, it can be considered to be black to reduce the reflection of the light projected on the light-receiving surface of the screen plate 1 to improve the optical display performance of the screen plate 1.
  • the thickness of the adhesive film may be considered to be in the range of 0.08 to 0.15 mm.
  • the film thickness When the film thickness is less than 0.08mm, it will affect the bonding strength of the screen plate 1 and the woven fabric 2. When the film thickness is greater than 0.15mm, the tensile force of the woven fabric 2 cannot be well transmitted to the screen plate 1, thus Affect the flatness of the screen board 1. In addition, it is also required that the peeling force between the film and the steel plate at 180° is greater than or equal to 1500g/25mm. In this way, sufficient bonding strength can be provided between the screen plate 1 and the adhesive layer 5, and between the woven cloth 2 and the adhesive layer 5, and prevent the screen plate 1 from peeling off from the woven cloth 2.
  • the adhesive layer 5 may also be other materials with an adhesive function, such as an adhesive, etc., and such changes fall within the protection scope of the present application.
  • the adhesive layer 5 covers the entire back of the screen plate 1, so that the entire hard screen plate 1 can be attached to the soft woven cloth 2 through the adhesive layer 5, because the woven cloth 2 is breathable Therefore, the occurrence of bubbles and bulging can be avoided in the entire range of the screen panel 1, so that the entire screen panel 1 has good flatness.
  • the woven cloth 2 needs to cover the entire back of the adhesion layer 5, so that the stretching of the woven cloth 2 can drive the adhesion layer 5 and the hard screen plate 1 to stretch and stretch, thereby maintaining the screen plate 1. The better flatness.
  • the screen plate 1 can be attached to the center of the woven cloth 2, and the edge of the woven cloth 2 will extend to the outside of the edge of the screen plate 1 for connection with other structures.
  • the woven fabric 2 is woven with yarns, so it has good air permeability. During the process of sticking the adhesive layer 5 on the woven fabric 2, even if there are air bubbles between the adhesive layer 5 and the woven fabric 2 , The gas will also be discharged from the woven cloth 2, so that bulging between the adhesion layer 5 and the woven cloth 2 can be prevented, thereby further ensuring the flatness of the screen panel 1.
  • the projection screen also includes a plurality of elastic connectors 4, the elastic connectors 4 themselves are elastic, so when the elastic connector 4 is fixed at one end When the edge of the woven cloth 2 is connected with the screen frame 3 surrounding the screen board 1, the woven cloth 2 can be stretched by its own elasticity, and the woven cloth 2 can be forced to open in a flat and stretched state.
  • the direction of the elastic force of the elastic connector 4 is generally the direction of tension, that is, when the elastic connector 4 is connected between the woven fabric 2 and the screen frame 3, the elastic connector 4 can connect the woven fabric 2 Stretch the screen frame 3 on the outside until the woven fabric 2 is stretched out.
  • the screen plate 1 since the woven fabric 2 and the screen plate 1 are bonded and bonded to each other through the adhesive layer 5, when the woven fabric 2 is stretched outward, the screen plate 1 will also be stretched outwards until the screen plate 1 Stretch to a flat state. At this time, the screen panel 1 can ensure better flatness, so that the pictures and images projected on the front of the screen panel 1 have a better display effect, and avoid skew and deformation of the projection picture.
  • the projection screen in this embodiment can fix the screen panel 1 through the woven cloth 2, the elastic connector 4, and the screen frame 3.
  • the woven cloth 2 can be In the stretched state, a stretching force is also applied to the screen panel 1 through the transfer of the adhesive member 5, so that the rigid screen panel 1 also presents a stretched and unfolded state, which is beneficial to the rigid screen panel 1 to achieve flatness.
  • FIG. 4 is a schematic structural diagram of a woven fabric in a projection screen provided in Embodiment 1 of the present application
  • Fig. 5 is a schematic structural diagram of another woven fabric in a projection screen provided in Embodiment 1 of the present application
  • Fig. 6 is an embodiment of the present application
  • the woven fabric 2 in this embodiment is interlaced with fibers 6 in different weaving directions, and a breathable gap 7 is formed between adjacent fibers 6.
  • each woven fabric 2 It is knitted by different weaving methods, so the patterns of the knitted fabric 2 in each figure are different.
  • the entire woven fabric 2 is woven by multiple strands of fibers 6, and therefore the air gap 7 formed between adjacent fibers 6 spreads over the entire woven fabric 2.
  • the air-permeable gap 7 will be uniformly distributed in the entire adhesive layer 5, so that there will be no air bubbles and bulging in the entire adhesive layer 5 phenomenon.
  • the fabric fiber specifications of the woven fabric 2 are: 800-1200D/36F in the warp direction and 800-1200D/36F in the weft direction.
  • the D (dinier, Denier number) in the above 800-1200D/36F refers to the unit of thickness of a yarn, which is expressed in grams of the weight of the yarn at a length of 9000 meters, which is also called and counted. The larger the D, the thicker the yarn, for example, 1200D is thicker than 800D.
  • F filament, number of filaments refers to the number of filaments
  • 1200D/36F refers to a yarn consisting of 36 spun yarns.
  • the higher the F number the greater the difficulty of weaving, and vice versa; the same F number, the lower the D number, the more difficult the weaving, and vice versa.
  • the type of yarn whose F number divided by D number is less than 1 is called superfine fiber. The greater the difference between F number and D number, the greater the difficulty in production and subsequent weaving.
  • the fabric fiber specifications are: 800-1200D/36F in the warp direction, 800-1200D/36F in the weft direction, and the range of D is 800-1200, which can make the woven fabric 2 more rigid.
  • the multiple elastic members 4 are spaced apart from each other, that is, the position where the elastic member 4 applies force to the woven cloth is not continuous on the edge of the woven cloth 2, so the edge of the woven cloth 2 is between the two elastic members 4 The part at which is not directly affected by the tension of the elastic member 4, so the force on the edge of the woven fabric 2 is not uniform.
  • the woven fabric 2 is too soft, the part stretched by the elastic member 4 may deform more, while the part not directly stretched by the elastic member 4 deforms less, so that the middle part of the woven fabric 2 has different sizes in different directions. The deformation of one, this will cause the screen plate 1 bonded to the woven cloth 2 to be unevenly pulled and affect the flatness. If the woven cloth 2 is harder, even if the edge of the woven cloth 2 is unevenly pulled , The middle part of the woven cloth 2 is not easy to produce large deformation, and ultimately it is more beneficial to maintain the flatness of the screen panel 1. In addition, the woven fabric 2 can transmit force better when being stretched, and has relatively stable properties, which can adapt to a wider range of environments, for example, it can maintain good flatness between -10°C and 40°C. Degree and reliability.
  • the warp density of the woven fabric 2 is 11-17 pieces/cm, and the weft density is 9-15 pieces/cm.
  • the horizontal direction of the fabric is the warp direction and the vertical direction is the weft direction.
  • the warp direction defines the length of the cloth, and the weft direction defines the width of the cloth, commonly known as the width.
  • the air-permeable gap 7 between adjacent fibers 6 is small, which is not conducive to the adhesion of the adhesive layer 5 and the woven fabric 2 to exhaust the air between them; when the density of the woven fabric 2 If it is too small, the ventilation gap 7 is relatively large, but the woven fabric is loosely woven, which may cause the woven fabric 2 to be easily deformed, which is not conducive to maintaining the flatness of the screen panel 1.
  • the warp density of the woven fabric 2 in this embodiment is 11-17 pieces/cm, and the weft density is 9-15 pieces/cm.
  • the density is relatively high, but it can ensure that the air gap 7 is large enough to adhere
  • the air between the layer 5 and the woven fabric 2 is discharged, so that the woven fabric 2 has good air permeability, so that when the adhesive layer 5 is attached to the woven fabric 2, even if the adhesive layer 5 and the woven fabric 2 are attached
  • the air bubbles generated therebetween will also be discharged through the air-permeable gap 7 on the woven cloth 2 to avoid bulging between the woven cloth 2 and the screen panel 1 and improve the flatness of the screen panel 1.
  • the woven fabric 2 can have sufficient strength and not easily deform.
  • the woven fabric 2 is kept flat by the stretching of the elastic member 4. Therefore, the woven fabric 2 needs to maintain a certain strength and tear resistance to avoid using During the process, the woven fabric 2 is broken, which affects the normal use of the projection screen.
  • the tear resistance of the woven fabric 2 is 120-140N in the warp direction and 120-140N in the weft direction to ensure that the woven fabric 2 can It satisfies the normal use of the projection screen, and can also ensure that the woven fabric 2 will not be torn when the projection screen is subjected to a sudden strong impact.
  • the woven fabric 2 in this embodiment is pasted on the back of the screen panel 1.
  • the woven fabric 2 is tensioned to ensure the flatness of the screen panel 2.
  • the shrinkage and deformation of the cloth 2 will also affect the flatness of the screen panel 1. Therefore, the shrinkage rate of the woven cloth 2 is required to be in the range of 2% to 3%. If it exceeds 3%, it may shrink during use. Affect the flatness of the screen board 1.
  • the woven cloth 2 adopted in this embodiment greatly reduces the weight of the projection screen, and is easy to install and low in cost.
  • the weight of the woven fabric 2 of this embodiment can be 280-330 g/m 2.
  • the hard screen panel 1 can usually be composed of a hard layer, a Fresnel structure layer, a projection layer, etc., which has a certain strength and rigidity, and can have a certain verticality in a vertical free sag state so that The screen panel looks flat, but because it still has a certain degree of softness, such as no support or interference from external forces, the hard screen panel still cannot meet the flatness requirements for display, and the screen is not flat, which will cause the laser projection screen to display Time deformation, blurring, uneven brightness, or other degradation problems.
  • the woven fabric 2 is used as the connection structure.
  • the woven fabric 2 of this embodiment has the characteristics of inelasticity, ultra-thinness, compactness and high strength, so that the woven fabric 2 is attached to the screen plate 1.
  • an integrated structure can be formed between the two, thereby facilitating the transmission of force, so that the screen panel 1 can follow the deformation of the woven fabric 2 to produce stretching.
  • the color of the woven cloth 2 may generally be black, so that the woven cloth 2 can cover the area on the back of the screen panel 1 opposite to the light-receiving area, and play a role of shading and protecting the screen panel 1.
  • the rigid screen plate 1 is an optical structure layer with a certain light transmittance, especially when used as a front projection screen, the innermost layer is a reflective layer, and the reflective layer's action surface is to reflect the projected light (such as Aluminum-plated film), but due to the inability to achieve 100% reflectivity, part of the light will pass through, which will cause the image contrast to drop. Therefore, on the back of the screen panel 1, a black woven cloth is used to shield the light, which is conducive to not leaking light, and at the same time, it can also prevent scratches on the back of the screen, and protect the screen panel 1.
  • the adhesive layer 5 used to connect the screen plate 1 and the woven cloth 2 usually has a thermal expansion coefficient similar to or the same as that of the screen plate 1, or has a certain degree of ductility, so that the screen plate 1 is produced due to temperature changes.
  • the adhesive layer 5 will play a certain buffering effect, reducing the impact of the screen panel 1 on the projection screen due to thermal expansion and contraction deformation, and also help maintain the flatness of the hard screen panel 1. It prevents the screen plate 1 from generating stress due to the different expansion coefficients and different expansion rates, which affects the flatness.
  • the screen frame 3 is generally a frame structure, and the screen frame 3 encloses a rectangular or square hollow area, which can be used for placement
  • the screen board 1, and the screen frame 3 can surround the edge of the screen board 1 to provide protection for the screen board 1, and the screen frame 3 and the woven cloth 2 are connected by elastic connectors 4, the specific structure of the screen frame 3
  • the connection relationship is shown in Figures 2 and 3, in which for ease of description, the screen frames on the upper and lower sides of the screen panel 1 are taken as an example for description. It can be understood that the structures on the left and right sides of the screen frame 3 also have similar structures and connection relationships with the upper and lower sides, and will not be repeated here.
  • the elastic connecting member 4 when used to realize the connection between the woven cloth 2 and the screen frame 3, there may be a variety of different structures and relative positions between the woven cloth 2, the elastic connecting member 4 and the screen frame 3.
  • the size of the screen frame 3 can be larger than the size of the woven cloth 2, so the screen frame 3 is located outside the edge of the woven cloth 2.
  • one end of the elastic connecting piece 4 can be connected to the edge of the woven cloth 2, and the other end of the elastic connecting piece 4 extends outward from the edge of the woven cloth 2 and is fixed to the screen frame 3 located outside the woven cloth 2.
  • the woven cloth 2 can be fixed in the center of the screen frame 3 by the elastic connecting piece 4, and the woven cloth 2 can be stretched by the elastic force of the elastic connecting piece 4, so that the woven cloth 2 can maintain a flat stretched state.
  • the outer side of the woven cloth 2 will include the elastic connecting member 4 and the screen frame 3, thus the projection screen
  • the outside of the screen panel 1 will have a wider frame area.
  • the elastic connecting member 4 may be provided with other positions to reduce the area of the elastic connecting member 4 and the screen frame 3 on the front surface of the screen panel 1 of the projection screen.
  • the screen frame 3 may include an outer edge support portion 31, which is supported on the back of the edge of the screen board 1, and the edge of the outer edge support portion 31 is located on the edge of the screen board 1. Outside the range, the edge of the woven fabric 2 extends to the outer side of the outer edge support portion 31 and then bends in the opposite direction, so as to connect with the elastic connecting member 4 after wrapping the edge of the outer edge support portion 31.
  • the outer edge support portion 31 will attach to the side of the woven fabric 2 facing away from the screen panel 1, and abut and support the edge back of the screen panel 1. Since the screen frame 3 is generally a rigid structure, the outer edge support portion 31 can achieve good contact support on the back of the screen panel 1 through the soft woven cloth 2. At the same time, the outer edge support portion 31 is located on the outer edge of the screen frame 3, that is, the outermost area of the screen frame 3. After the woven fabric 2 and the screen plate 1 are attached, the edge of the woven fabric 2 is located outside the edge of the screen plate 1, and can continue to extend outward, and wrap around from the outside of the outer edge support portion 31 to the rear area of the screen frame 3.
  • the woven fabric 2 is equivalent to being hung on the edge of the outer edge support portion 31, and the edge of the outer edge support portion 31 can be used as a support point to support the woven fabric 2.
  • the edge of the outer edge support portion 31 can be equivalent to a fixed pulley, so that the woven cloth 2 on both sides of the edge of the outer edge support portion 31 moves in two different directions depending on the support of the outer edge support portion 31.
  • the location of the elastic connector 4 is no longer limited to the outside of the edge of the woven fabric 2, but can be set in the coverage area when the woven fabric 2 is stretched.
  • the first end of the elastic connecting member 4, that is, the end connected to the edge of the woven cloth 2 may be located outside the second end of the elastic connecting member 4.
  • the elastic connecting member 4 can be hidden in the back direction of the screen panel 1, so that the elastic connecting member 4 will be shielded by the front screen panel 1 and the woven cloth 2, making it difficult to see from the front of the projection screen.
  • the area outside the edge of the screen panel 1 no longer has the elastic connector 4, but only includes the woven cloth 2 and the screen frame 3. Therefore, the formed frame area has a smaller width, which can effectively improve the appearance of the projection screen display effect.
  • the pulling force direction of the elastic connecting member 4 can be kept at an angle parallel or close to parallel with the plane where the screen plate 1 is located. This can bring two benefits: on the one hand, the overall volume and thickness of the projection screen can be reduced.
  • the direction of the elastic deformation is located in the plane where the screen plate is located, or has a higher level than the plane.
  • the small included angle so the deformation in the thickness direction of the projection screen is small, which can effectively reduce the thickness of the projection screen; on the other hand, when the tension direction of the elastic connector 4 is parallel to the plane where the screen plate 1 is located, It is also easy to make the screen plate 1 stretch along the plane where it is located, to ensure that the screen plate 1 is always in the same plane, avoiding that the tensile direction of the elastic connector 4 is not parallel to the plane of the screen plate (the tensile force of the elastic connector 4 There is an angle between the direction and the plane where the screen panel 1 is located), and the screen panel 1 is twisted in other directions.
  • the elastic connecting member 4 and the screen frame 3 or the woven cloth 2 As well as the elastic connecting member 4 and There will also be many different connection modes between the screen frames 3.
  • the screen frame 3 is a rigid body, it can be connected to the elastic connector 4 by common fixing methods such as snap connection, threaded fastener connection or riveting.
  • the woven fabric 2 is made of a relatively soft material, it is not convenient to directly connect with the elastic connector 4, so it is usually necessary to fix a rigid connection structure on the woven fabric 2, and use the connection structure to connect the woven fabric 2 and the elastic Pieces 4 are connected together.
  • the edge of the woven cloth 2 is provided with at least one rigid fixing member 21 for connecting with the elastic connecting member 4.
  • the edge of the woven cloth 2 can be enclosed in a closed shape, so that the rigid fixing member 21 can be fixed inside the closed shape, thereby realizing the rigid fixing member 21 and the woven cloth Fixed between 2.
  • the rigid fixing member 21 may have a variety of different shapes and structures, for example, may be a straight rod-shaped structure.
  • the edge of the woven fabric 2 can be crimped inward and sewn together with the inner side of the woven fabric 2, so that the edge of the woven fabric 2 can form a closed hole for the straight rod-shaped rigid fixing member 21 to pass through.
  • the rigid fixing member 21 moves under the tensile force of the elastic connecting member, the woven fabric 2 will also move and be stretched into a flat stretched state.
  • the rigid fixing member 21 can also be directly stitched to the edge of the woven cloth 2.
  • the woven fabric 2 can be connected to the elastic connector 4 through the rigid fixing member 21, it can rely on the rigid fixing member to carry the force, which can make the edge of the woven fabric 2 less likely to be torn or damaged, and compared to directly hanging on
  • the tensile force of the finite elastic connectors can be homogenized in the direction of the entire rigid fastener from the point of application to the rigid fastener. In this way, the stretching force can be uniformly applied to the woven cloth, so that the stretching force of the woven cloth to the hard screen board is uniform everywhere, which is more conducive to achieving consistent flatness.
  • the elastic connecting member 4 can generally be a tension spring.
  • One end of the tension spring can be connected to the rigid fixing member 21 in the form of hanging, and the other end of the tension spring is fixed to Screen frame 3.
  • the side of the tension spring may also be provided with a tension ring 41 for hooking foreign objects. In this way, the operator can extend the hand or other objects into the tension ring 41 to perform operations such as loading and unloading or stretching the tension spring, thereby facilitating the assembly or assembly between the tension spring and the rigid fixing member 21 and the screen frame 3 Disassembly operation.
  • the elastic connecting member 4 may also be an elastic connecting structure commonly used by those skilled in the art, such as a rubber body, which will not be repeated here.
  • the elastic connecting members 4 can be arranged at intervals and have a suitable arrangement density. In this way, on the one hand, multiple elastic connectors 4 can be used to provide sufficient indirect tensile force to the screen panel 1. On the other hand, the number of elastic connectors 4 is appropriate, which can also avoid installation when the number of elastic connectors 4 is too large. difficult.
  • a plurality of elastic connecting members 4 may be arranged at intervals around the screen panel 1, for example, arranged at equal intervals in a symmetrical direction. In this way, the upper, lower, left, and right directions of the screen panel 1 will be subjected to the pulling force of the elastic connecting member 4, so the screen panel 1 can be effectively stretched in all directions and maintain a flat state.
  • a front decorative frame (not shown in the figure) for covering the edge of the woven cloth is provided on the front of the screen panel 1, and the front decorative frame is connected to the screen frame 3.
  • the front decorative frame can be set on the screen frame 3 and cover the woven fabric 2 exposed outside the edge of the screen board 1 to avoid the woven fabric 2 from being exposed, so that the front and outside of the screen board 1 are front decorative frames for effective Improve the front beauty of the projection screen.
  • the front decorative frame and the screen frame 3 are similar in structure, and both have a rectangular frame structure.
  • the surface of the front decorative frame can be treated by surface treatment processes such as electroplating, wire drawing, or painting to further improve its aesthetics.
  • the front decorative frame and the screen frame 3 may be connected by a connection method commonly used by those skilled in the art, such as clamping, bonding, or threaded fastener connection.
  • the projection screen specifically includes a hard screen panel, a soft woven cloth, an adhesive layer, a screen frame surrounding the peripheral side of the screen panel, and a plurality of elastic connectors;
  • the front of the screen panel is the projection receiver
  • the back side of the screen board is attached to the woven cloth through the adhesive layer.
  • the woven cloth covers the area on the back of the screen board opposite to the front light-receiving area, and the edge of the woven cloth is outside the edge range of the screen board.
  • Each elastic connector The first end is connected with the edge of the woven cloth, and the second end is connected with the screen frame, so that the woven cloth and the screen board are stretched to a flat state by the tension of the elastic connecting member.
  • the soft woven cloth and elastic connectors can be used to realize the fixation and positioning between the screen panel and the screen frame.
  • the screen panel can rely on the elasticity of the elastic connectors to be in a flat extended state without deformation.
  • due to the weaving The cloth has good air permeability, and there is no bulging phenomenon between the woven cloth and the adhesion layer, which further increases the flatness of the screen board and the projection image quality is higher.
  • the second embodiment of the present application also provides a projection system.
  • the projection system provided in this embodiment specifically includes a projection device and the projection screen in the first embodiment, and the projection device is used to project a projection image onto a screen plate of the projection screen.
  • the specific structure, working principle and function of the projection screen have been described in detail in the first embodiment, and will not be repeated here.
  • the projection device may be various existing projectors, such as laser projectors.
  • the projection device can project a projection image to the screen panel of the projection screen, so that the screen panel can display the projection image for people to watch.
  • the screen panel in the projection screen can maintain the stretched state under the pulling force of the elastic connecting member, and the flatness is good, which can effectively ensure the quality of the image projected on the screen panel.
  • the projection system specifically includes a hard screen panel, a soft woven cloth, an adhesive layer, a screen frame surrounding the peripheral side of the screen panel, and a plurality of elastic connectors;
  • the front of the screen panel is the projection light receiver
  • the back side of the screen board is attached to the woven cloth through the adhesive layer.
  • the woven cloth covers the area on the back of the screen board corresponding to the front light-receiving area, and the edge of the woven cloth is outside the edge range of the screen board.
  • Each elastic connector The first end is connected with the edge of the woven cloth, and the second end is connected with the screen frame, so that the woven cloth and the screen board are stretched to a flat state by the tension of the elastic connecting member.
  • the soft woven cloth and elastic connectors can be used to realize the fixation and positioning between the screen panel and the screen frame.
  • the screen panel can rely on the elasticity of the elastic connectors to be in a flat extended state without deformation.
  • due to the weaving The cloth has good air permeability, and there is no bulging phenomenon between the woven cloth and the adhesion layer, which further increases the flatness of the screen board and the projection image quality is higher.
  • This embodiment provides a method for assembling the projection screen described in the first embodiment, wherein the specific structure, working principle and function of the projection screen have been described in detail in the first embodiment, and will not be repeated here.
  • FIG. 8 is a schematic flowchart of a projection screen assembling method provided in the third embodiment of the present application. As shown in FIG. 8, the assembling method of the projection screen in this embodiment includes:
  • the sticky adhesive layer is attached to the separator, such as release paper.
  • Release paper is also called release paper and release paper. It is a way to prevent the adhesion of the adhesive material and protect the adhesive material from sticking.
  • Contaminated release paper, specifically, release paper is generally pasted on one surface of the adhesive layer. In the above steps, one side of the adhesive layer is pasted on the release paper.
  • One side of the release paper is pasted on the woven fabric by rolling, etc., so as to ensure that the adhesive layer and the woven fabric are seamlessly attached, and, in the process, if there is a gap between the woven fabric and the adhesive layer In the case of air bubbles, the gas is discharged through the woven cloth to avoid bulging in the adhesive layer, which further increases the flatness of the screen panel.
  • the release paper is located on the side of the adhesive layer away from the woven fabric.
  • S20 Remove the release paper to expose the adhesive layer, and attach the screen board to the surface of the adhesive layer.
  • the sticky surface of the adhesion layer can be exposed, and the screen board can be attached to the surface of the adhesion layer by rolling or the like to form a structure of woven cloth + adhesion layer + screen board.
  • the edge of the woven cloth can be connected to the first end of the elastic connector, and the second end of the elastic connector can be connected to the screen frame, so that the woven cloth and the screen panel can be stretched to a flat state by the tension of the elastic connector.
  • the method of assembling the projection screen includes: sticking the adhesive layer with release paper on the woven cloth, the release paper is located on the side of the adhesive layer away from the woven cloth; removing the release paper to expose the adhesive Attach the layer and attach the screen board to the surface of the adhesive layer; stretch the woven cloth to a flat state.
  • the screen panel is fixed on the woven fabric through the adhesive layer. Due to the good air permeability of the woven fabric, there will be no bulging phenomenon between the woven fabric and the adhesive layer, which further increases the screen panel Flatness, high quality of the projected picture.

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Abstract

一种投影屏幕、投影系统及投影屏幕的装配方法。投影屏幕包括硬质的屏幕板(1)、软质的编织布(2)、粘附层(5)、围设在屏幕板(1)的周侧的屏幕框架(3)以及多个弹性连接件(4)；屏幕板(1)的正面为投影受光面，屏幕板(1)的背面通过粘附层(5)与编织布(2)贴合，编织布(2)覆盖屏幕板(1)背面的与正面受光区域对应的区域，且编织布(2)的边缘位于屏幕板(1)的边缘范围之外，每个弹性连接件(4)的第一端均与编织布(2)的边缘连接，第二端与屏幕框架(3)连接，以通过弹性连接件(4)的拉力将编织布(2)和屏幕板(1)拉伸至平整状态，能够在固定投影屏幕的屏幕板(1)的同时，使屏幕板(1)具有较好的平整度。

Description

投影屏幕、投影系统及投影屏幕的装配方法
本申请要求于2019年6月19日提交中国专利局、申请号为201910529539.9，申请名称为“投影屏幕、投影系统及投影屏幕的装配方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及投影显示领域，尤其涉及一种投影屏幕、投影系统及投影屏幕的装配方法。
背景技术
随着科技的不断发展，投影式显示系统越来越多的应用于人们的工作和生活中。激光投影因为其色域广，亮度高，寿命长等优点逐渐占据市场。目前，投影式显示系统的投影屏幕通常包括软幕和硬幕等不同种类。其中，硬幕因其具有良好的光学增益均匀性、色彩还原性和平整度，具有较好的显示效果等优点而得到了广泛的应用。
随着投影屏幕的尺寸不断增大(目前主流投影屏幕的尺寸通常在80寸以上)，为了对较为脆弱的硬幕进行固定，并保证投影屏幕的平整性，通常采用背板式固定结构对硬幕进行固定。图1是相关技术中背板式固定结构的结构示意图。如图1所示，具体的，背板式固定结构包括有装饰边框201和平板状的背部支撑板材204，将硬幕202与背部支撑板材204通过粘接剂203贴合固定，再将装饰边框201连接在背部支撑板材204上，从而完成对硬幕202的支撑固定，这样可以通过背部支撑板材204的刚性而维持硬幕202的平整度，避免硬幕202产生变形。
然而，采用整块背板式固定结构对硬幕进行固定时，背部支撑板材的面积 较大，加工时，大尺寸的板材容易发生鼓包等变形现象，从而影响整块硬幕的平整度。
申请内容
本申请提供一种投影屏幕，包括硬质的屏幕板、软质的编织布、粘附层、围设在屏幕板的周侧的屏幕框架以及多个弹性连接件；屏幕板的正面为投影受光面，屏幕板的背面通过粘附层与编织布贴合，编织布覆盖屏幕板背面的与正面受光区域对应的区域，且编织布的边缘位于屏幕板的边缘范围之外，每个弹性连接件的第一端均与编织布的边缘连接，第二端与屏幕框架连接，以通过弹性连接件的拉力将编织布和屏幕板拉伸至平整状态。
第二方面，本申请提供一种投影系统，包括投影装置和如上所述的投影屏幕，投影装置用于向投影屏幕的屏幕板投射投影画面。
第三方面，本申请提供一种上述的投影屏幕的装配方法，包括：将带有离型纸的粘附层粘贴在编织布上，离型纸位于粘附层的背离编织布的一侧；去除离型纸以露出粘附层，并将屏幕板贴合在粘附层的表面；将编织布拉伸至平整状态。
附图说明
为了更清楚地说明本申请实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术中背板式固定结构的结构示意图；
图2是本申请实施例一提供的投影屏幕的结构示意图；
图3是本申请实施例一提供的投影屏幕的截面示意图；
图4是本申请实施例一提供的投影屏幕中编织布的结构示意图；
图5是本申请实施例一提供的投影屏幕中另一种编织布的结构示意图；
图6是本申请实施例一提供的投影屏幕中再一种编织布的结构示意图；
图7是本申请实施例一提供的投影屏幕中屏幕板、粘附层、编织布的连接关系的结构示意图；
图8是本申请实施例三提供的投影屏幕的装配方法的流程示意图。
附图标记说明
1-屏幕板；2-编织布；3-屏幕框架；4-弹性连接件；5-粘附层；6-纤维；7-透气间隙；31-外沿支撑部；41-拉伸环；201-装饰边框；202-硬幕；203-粘接剂；204-背部支撑板材。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
实施例一
图2是本申请实施例一提供的投影屏幕的结构示意图。图3是本申请实施例一提供的投影屏幕的截面示意图。图7是本申请实施例一提供的投影屏幕中屏幕板、粘附层、编织布的连接关系的结构示意图。如图2、图3、图7所示，本实施例提供的投影屏幕，具体包括硬质的屏幕板1、软质的编织布2、粘附层 5、围设在屏幕板1的周侧的屏幕框架3以及多个弹性连接件4；屏幕板1的正面为投影受光面，屏幕板1的背面通过粘附层5与编织布2贴合，编织布2覆盖屏幕板1背面的与正面受光区域对应的区域，且编织布2的边缘位于屏幕板1的边缘范围之外，每个弹性连接件4的第一端均与编织布2的边缘连接，第二端与屏幕框架3连接，以通过弹性连接件4的拉力将编织布2和屏幕板1拉伸至平整状态。
其中，投影屏幕中的屏幕板1通常由硬质材料构成，具有较大的刚度与强度，因而当屏幕板1被拉伸时，即能够形成较为平整的表面。这样，屏幕板1的正面的至少部分区域可以用于作为用于投影图像的受光区域，以便将画面和图像投射在屏幕板1正面进行显示。
由于构成屏幕板1的硬质材料通常具有硬脆性，如果直接在硬质的屏幕板1上打孔或开槽进行固定，容易造成屏幕板1开裂。为了连接和固定硬质的屏幕板1，本实施例中的投影屏幕还包括有软质的编织布2，编织布2可以通过粘附层5粘接在硬质的屏幕板1上，并和其它固定结构实现连接，从而完成对屏幕板1的固定。此时，编织布2和屏幕板1之间通过粘附层5相互粘接贴合，因而编织布2的伸展程度也会通过粘附层5而影响到屏幕板1的卷曲或展开。为了和屏幕板1之间实现连接，编织布2具有足够的大小，以至少覆盖屏幕板1背面的与正面受光区域相对的区域。此时，受光区域的背面均和编织布2贴合。这样当编织布2为平整的伸展状态时，屏幕板1上的用于投射图像的受光区域也会被拉伸，从而实现较好的画面显示质量。
粘附层5是具有粘性的层，主要用来将编织布2和屏幕板1粘接起来，因此一般可以选择具有粘性的材料，例如无基材的胶膜等，粘附层5设置在屏幕 板1的背面，因此可以考虑将其设置为黑色，以尽量减少对投影到屏幕板1的受光面上的光的反射作用，以提高屏幕板1的光学显示性能。此外，为了进一步减小整个投影屏幕的厚度尺寸，并且提高屏幕板1的平整度，希望尽量减少胶膜的厚度，例如可以考虑将胶膜的厚度设置在0.08～0.15mm的范围内，当胶膜厚度小于0.08mm时，会影响到屏幕板1和编织布2的粘合强度，当胶膜厚度大于0.15mm时，编织布2受到的拉伸力无法很好地传递至屏幕板1，从而影响屏幕板1的平整度。此外，还要求胶膜在180°时与钢板的剥离力大于或者等于1500g/25mm。这样能够使屏幕板1和粘附层5之间、编织布2和粘附层5之间均具有足够的粘接强度，防止屏幕板1从编织布2上剥离。当然粘附层5除了上述的胶膜之外，也可以是其它具有粘附功能的材料例如粘接剂等，这样的变换均落在本申请的保护范围内。
另外，可选的，粘附层5覆盖于整个屏幕板1的背面，这样整个硬质的屏幕板1均能够通过粘附层5与软质的编织布2贴合，由于编织布2具有透气性，因此能够在整个屏幕板1的范围内都避免气泡和鼓包情况的发生，使整个屏幕板1都具有良好的平整性。此外，还需要使编织布2覆盖于整个粘附层5的背面，这样可以利用编织布2的伸展而带动粘附层5和硬质的屏幕板1实现拉伸和伸展，从而保持屏幕板1的较好的平整性。此时可以将屏幕板1贴在编织布2的中央位置，而编织布2的边缘会向屏幕板1的边缘外侧伸出，以便和其它结构进行连接。此外，编织布2由纱线编织而成，因此具有较好的透气性，将粘附层5粘贴在编织布2上的过程中，即使在粘附层5和编织布2之间存在有气泡，气体也会从编织布2排出，因此可以防止粘附层5和编织布2之间产生鼓包，从而进一步保证了屏幕板1的平整性。
由于编织布2为软质材料构成，因而为了让编织布2保持伸展状态，投影屏幕中还包括有多个弹性连接件4，弹性连接件4自身具有弹性，因而当弹性连接件4一端固定在编织布2的边缘，而另一端与围设在屏幕板1周侧的屏幕框架3连接时，可以凭借自身的弹性将编织布2撑开，迫使编织布2张开为平整的伸展状态。一般的，为了简化投影屏幕的整体结构，弹性连接件4的弹力方向一般为拉力方向，即当弹性连接件4连接在编织布2和屏幕框架3之间时，弹性连接件4可以将编织布2向外侧的屏幕框架3拉伸，直至编织布2张开至伸展状态。
此时，由于编织布2和屏幕板1彼此通过粘附层5粘接并贴合在一起，因而当编织布2向外伸展时，也会对屏幕板1形成向外拉伸，直至屏幕板1伸展至平整的状态。此时，屏幕板1可以保证较好的平整性，使投影在屏幕板1正面的画面和图像具有较佳的显示效果，避免投影画面出现歪斜和形变。
这样，本实施例中的投影屏幕，能够通过编织布2、弹性连接件4以及屏幕框架3对屏幕板1进行固定，同时通过外侧的弹性连接件4的拉伸作用，能够让编织布2呈拉伸状态，进而通过粘附件5的传递对屏幕板1也施加拉伸力，使得硬质屏幕板1也呈现拉伸展开的状态，利于硬质的屏幕板1实现平整性。
另外，图4是本申请实施例一提供的投影屏幕中编织布的结构示意图；图5是本申请实施例一提供的投影屏幕中另一种编织布的结构示意图；图6是本申请实施例一提供的投影屏幕中再一种编织布的结构示意图。如图4～图6所示，本实施例中的编织布2由不同织向的纤维6交错编织而成，相邻纤维6之间形成透气间隙7，图4～6中，各个编织布2采用不同的编织方法编织而成，因此各图中编织布2的花纹不同。由图中可知，整个编织布2由多股纤维6编织而 成，因此在相邻的纤维6之间形成的透气间隙7遍布整个编织布2的范围。这样，在粘附层5粘贴到编织布2上时，在整个粘附层5的范围内都会均布有该透气间隙7，使整个粘附层5的范围内均不会存在气泡和鼓包的现象。
此外，可选的，编织布2的布料纤维规格为：经向800～1200D/36F、纬向800～1200D/36F。上述800～1200D/36F中的D(dinier，丹尼数)是指一根成纱的粗细单位，它以成纱在9000米长度可称出来的重量克数来表示，也称且数。D越大，表示纱线越粗，例如，1200D比800D要粗。F(filament，根数)是指根数，1200D/36F是指一根成纱由36根细纱组成。在生产中，同等D而不同的F数情况下，F数越高，织造难度越大，反之则越易；同样在F数相同D数越低，织造越难，反之则越易。如F数除D数小于1的纱种，称之为超细纤维，F数与D数的差值越大，在生产和后续的织造中，难度都会大大增加。
在本实施例中，布料纤维规格为：经向800～1200D/36F、纬向800～1200D/36F，D的范围为800～1200，这样能够使编织布2的硬度较大。这是考虑到多个弹性件4彼此之间具有间隔，即弹性件4对编织布施力位置在编织布2的边缘上并不连续，因此编织布2边缘上、在两个弹性件4之间的部分处并未直接受弹性件4的拉力，因此编织布2边缘上各处的受力情况并不均匀。若编织布2过于柔软，可能会导致受弹性件4拉伸的部位变形较大，而不直接受弹性件4拉伸的部位变形较小，从而编织布2的中间部分在不同方向产生大小不一的变形，这样会导致粘接在编织布2上的屏幕板1被不均匀拉扯而影响平整度，而若编织布2的硬度较大，即使编织布2的边缘部受到了不均匀的拉力，在编织布2的中间部分也不容易产生较大的变形，最终更有利于保持屏幕板1的平整度。此外，编织布2能够在被拉伸时较好的传递作用力，且性质较为稳 定，能够适应较为广泛的环境，例如在-10℃至40℃的环境温度之间均能保持较好的平整度和可靠性。
此外，可选的，本实施例中，编织布2的经向密度为11～17根/cm，纬向密度为9～15根/cm。其中，面料的横为经向，纵为纬向。经向限定布匹的长度，纬向限定布匹的宽度，俗称幅宽。编织布2的密度过大时，相邻纤维6之间的透气间隙7较小，不利于粘附层5和编织布2贴合时使二者之间的气体排出；当编织布2的密度过小时，透气间隙7较大，但由于编织布编织地较为疏松，有可能导致编织布2容易发生变形，不利于保持屏幕板1的平整度。而本实施例中的编织布2的经向密度为11～17根/cm，纬向密度为9～15根/cm，致密性较高，但又能够保证透气间隙7的大小足够将粘附层5和编织布2之间的气体排出，使编织布2具有良好的透气性，这样当将粘附层5贴合在编织布2上的过程中，即使在粘附层5和编织布2之间产生气泡，也会通过编织布2上的透气间隙7而排出，避免在编织布2和屏幕板1之间产生鼓包，提高了屏幕板1的平整性。同时又能使编织布2具有足够的强度，不易变形。
进一步的，本实施例的投影屏幕在工作的过程中，编织布2通过弹性件4的拉伸而保持平整状态，因此还需要使编织布2保持一定的强度和抗撕裂性，避免在使用的过程中，编织布2发生破裂，影响投影屏幕的正常使用，在本实施例中，编织布2的抗撕裂强度为经向120～140N、纬向120～140N，以保证编织布2能满足投影屏幕的正常使用，同时在投影屏幕受到突发性地强冲击时，也能保证编织布2不会被撕裂。
此外，由纤维编织而成的布料均具有一定的缩水率，本实施例中的编织布2粘贴在屏幕板1的背面，依靠编织布2被张紧而保证屏幕板2的平整度，若编 织布2发生缩水、变形，也会影响到屏幕板1的平整度，因此编织布2的缩水率要求在2％～3％的范围内，若超过3％则有可能在使用过程中发生缩水而影响屏幕板1的平整度。
和相关技术将屏幕板1固定在背部支撑板材204相比，本实施例采用的编织布2极大地减轻了投影屏幕的重量，并且安装方便，成本较低。当然，为了进一步减轻投影屏幕的重量，可以使本实施例的编织布2的重量为280-330g/m2。
以下对本实施例中投影屏幕的具体结构和工作原理进行进一步详细说明。
可选的，硬质的屏幕板1通常可以由硬质层、菲涅尔结构层以及投射层等组成，具有一定的强度和刚度，而且在竖直的自由下垂状态下能够具有一定垂直度使得屏幕板看起来平整，但由于仍具有一定的软度，如无支撑或者受到外力干扰，硬质的屏幕板仍无法达到显示所需的平整度要求，屏幕不平整，就会使得激光投影画面显示时变形、模糊，亮度不均，或者其他劣化问题。
而为了对硬质的屏幕板1实现固定，使用编织布2作为连接结构，本实施例的编织布2具有无弹性、超薄、致密和高强度等特性，这样编织布2和屏幕板1贴合时，能够让两者之间形成一体式结构，从而便于实现力的传递，使屏幕板1能够跟随编织布2的形变而产生拉伸。
可选的，编织布2的颜色一般可以为黑色，这样编织布2可以遮盖住屏幕板1背面的与受光区域相对的区域，起到遮光和保护屏幕板1的作用。这是因为硬质的屏幕板1为光学结构层，具有一定的透光率，尤其作为正投屏幕时，最里面一层为反射层，反射层的作用面是对投射光进行反射(比如为镀铝膜)，但由于无法做到100％的反射率，所有会有部分光透过，这样会造成图像对比度的下降。因此，在屏幕板1的背面，利用黑色的编织布进行遮光，有利于光线 不泄露，同时还能防止屏幕背面划伤等，对屏幕板1起到保护作用。
一般的，用于连接屏幕板1和编织布2的粘附层5，其通常具有和屏幕板1相近或相同的热膨胀系数，或者是具有一定的延展性，这样屏幕板1因温度变化而产生热胀冷缩时，粘附层5会起到一定的缓冲作用，减小屏幕板1因热胀冷缩变形而对投影画面造成的影响，也有利于维持硬质屏幕板1的平整度，防止因为两者膨胀系数不同，伸缩率不同，使得屏幕板1产生应力，而影响平整度。
如图2、3所示，为了连接和定位编织布2以及屏幕板1，屏幕框架3一般为框架式结构，且屏幕框架3围成一个矩形或者正方形的中空区域，该中空区域可以用于安放屏幕板1，而屏幕框架3可以围绕在屏幕板1的边缘之外，为屏幕板1提供保护，而屏幕框架3和编织布2之间通过弹性连接件4实现连接，屏幕框架3的具体结构以及连接关系如图2、3所示，其中为便于叙述，以屏幕板1上侧和下侧的屏幕框架为例进行说明。可以理解的是，屏幕框架3的左右两侧的结构也具有和上下两侧相似的结构和连接关系，此处不再赘述。
具体的，在利用弹性连接件4实现编织布2和屏幕框架3之间的连接时，编织布2、弹性连接件4和屏幕框架3之间可以有多种不同的结构以及相对位置。作为其中一种可选的实施方式，屏幕框架3的大小可以大于编织布2的大小，因而屏幕框架3位于编织布2的边缘外侧。此时，弹性连接件4的一端即可连接在编织布2的边缘，而弹性连接件4的另一端从编织布2的边缘向外伸出，并固定在位于编织布2外侧的屏幕框架3上，这样即可依靠弹性连接件4将编织布2固定在屏幕框架3的中央，并依靠弹性连接件4的弹力对编织布2进行拉伸，让编织布2保持平整的伸展状态。
而由于将屏幕框架3设置在编织布2的边缘外侧，而弹性连接件4位于编织布2边缘的外侧的连接方式，在编织布2外侧会包括弹性连接件4以及屏幕框架3，因而投影屏幕的屏幕板1外侧会具有较宽的边框区域。为了减小屏幕板1外侧的边框区域的大小，弹性连接件4可以设置其它位置，以减小弹性连接件4和屏幕框架3在投影屏幕的屏幕板1正面的面积大小。
作为另一种可选的实施方式，屏幕框架3可以包括外沿支撑部31，外沿支撑部31支撑在屏幕板1的边缘的背面，且外沿支撑部31的边缘位于屏幕板1的边缘范围之外，编织布2的边缘伸出至外沿支撑部31的外侧后反向弯折，以在包裹外沿支撑部31的边缘后与弹性连接件4连接。
其中，由于编织布2和屏幕板1的背面贴合，因而外沿支撑部31会和编织布2的背离屏幕板1的一面贴合，并抵接支撑在屏幕板1的边缘背面。由于屏幕框架3一般为硬质结构，所以外沿支撑部31可以通过软质的编织布2而对屏幕板1的背面实现良好的接触支撑。同时，外沿支撑部31位于屏幕框架3的外沿，也就是屏幕框架3的最外侧区域。编织布2和屏幕板1贴合后，编织布2的边缘位于屏幕板1的边缘之外，并可继续向外伸出，并从外沿支撑部31的外侧绕到屏幕框架3的后方区域，将外沿支撑部31的边缘包裹起来，再与弹性连接件4之间进行连接。这样，编织布2等效于吊挂在外沿支撑部31的边缘上，而外沿支撑部31的边缘则可作为支承点对编织布2进行支撑。此时，外沿支撑部31的边缘可以等效为一个定滑轮，使外沿支撑部31边缘两侧的编织布2依靠外沿支撑部31的支撑而向两个不同的方向运动，当弹性连接件4对外沿支撑部31边缘背面的编织布2施加方向为远离外沿支撑部31边缘的拉力时，位于外沿支撑部31边缘正面的编织布2就会被反向拉动，并向靠近外沿支撑部31 边缘的方向移动，从而得到了拉伸和伸展。
由于外沿支撑部31能够改变编织布2所受到的作用力方向，因而弹性连接件4的设置位置不再局限于编织布2的边缘外侧，而是可以设置在编织布2伸展时的覆盖范围之内。可选的，弹性连接件4的第一端，也就是与编织布2的边缘连接的一端可以位于弹性连接件4的第二端的外侧。此时，弹性连接件4可以隐藏在屏幕板1的背面方向，这样弹性连接件4会被前方的屏幕板1和编织布2所遮蔽，从投影屏幕的正面难以看到。这样的设置方式，屏幕板1边缘外侧的区域不再具有弹性连接件4，而仅仅只包括编织布2以及屏幕框架3，所以形成的边框区域具有较小的宽度，可以有效提升投影屏幕的外观显示效果。
在上述编织布2的边缘的连接方式中，可以让弹性连接件4的拉力方向与屏幕板1所在的平面保持平行或者接近平行的角度。这样可以带来两方面好处：一方面可以减小投影屏幕的整体体积和厚度，当弹性连接件4在产生弹性形变时，弹性形变的方向位于屏幕板所在的平面内，或者与该平面具有较小的夹角，因而在投影屏幕的厚度方向上的形变量较小，能够有效减小投影屏幕的厚度；另一方面，当弹性连接件4的拉力方向和屏幕板1所在的平面平行时，也容易使得屏幕板1沿着自身所在的平面拉伸延展，确保屏幕板1始终处于同一平面内，避免由于弹性连接件4的拉力方向不与屏幕板所在平面内平行(弹性连接件4的拉力方向和屏幕板1所在的平面之间具有夹角)，而使屏幕板1在其它方向上产生扭曲。
而在实现弹性连接件4与屏幕框架3或者编织布2之间的连接时，根据弹性连接件4的类型以及结构的不同，弹性连接件4和编织布2之间，以及弹性连接件4和屏幕框架3之间也会具有多种不同的连接方式。其中，因为屏幕框 架3为刚体，所以可以采用卡接、螺纹紧固件连接或者铆接等常用的固定方式与弹性连接件4连接在一起。而由于编织布2为较为柔软的材质所构成，不便于和弹性连接件4直接连接，因而通常还需要在编织布2上固定刚性的连接结构，并利用该连接结构将编织布2和弹性连接件4连接在一起。
作为一种可选的连接方式，编织布2的边缘设置有至少一个用于和弹性连接件4连接的刚性固定件21。为了让编织布2和刚性固定件21连接，编织布2的边缘可以围成闭合形状，这样刚性固定件21即可被固定在该闭合形状的内部，由此实现了刚性固定件21和编织布2之间的固定。刚性固定件21可以为多种不同的形状和结构，例如可以为直杆状结构等。而相应的，编织布2的边缘可以向内卷曲，并与编织布2的内侧缝纫在一起，这样编织布2的边缘部位就可形成闭合孔，以供直杆状的刚性固定件21穿设在其中。这样当刚性固定件21在弹性连接件的拉力下移动时，编织布2也会随之移动，并被拉伸为平整的伸展状态。此外，刚性固定件21也可以直接被缝合在编织布2的边缘。因为编织布2可以通过刚性固定件21与弹性连接件4实现连接，因而可以依靠刚性固定件承载作用力，能够使编织布2的边缘不易发生撕裂或损坏，并且相比于直接挂接在编织布，比如孔洞或环上，由于弹性连接件的数量为有限个，通过刚性固定件能够对有限个弹性连接件的拉伸力在整个刚性固定件由施力点向其所在方向上进行匀化，这样拉伸力能够均匀的施加到编织布上，从而编织布对于硬质屏幕板的拉伸力在各处也都是均匀的，更加有利于实现一致的平整性。
可选的，为了连接刚性固定件21，弹性连接件4一般可以为拉伸弹簧，拉伸弹簧的一端可以以吊挂等形式连接在刚性固定件21上，而拉伸弹簧的另一端固定在屏幕框架3上。进一步的，为了便于装配，拉伸弹簧的侧方还可以设置 有可供外物钩挂的拉伸环41。这样操作人员可以通过将手或者其它物体伸入拉伸环41，以对拉向弹簧进行装卸或者拉伸等操作，从而便于实现拉向弹簧与刚性固定件21以及屏幕框架3之间的装配或拆卸操作。此外，弹性连接件4还可以为橡胶体等本领域技术人员常用的弹性连接结构，此处不再赘述。
由于屏幕板1的面积较大，所以通常需要多个弹性连接件4共同拉伸，才能让屏幕板1和编织布2有效的展开成平整状态。弹性连接件4之间可间隔设置，且具有合适的排布密度。这样一方面可以利用多个弹性连接件4对屏幕板1提供足够的间接的拉伸力，另一方面，弹性连接件4具有合适的数量，也能避免弹性连接件4数量过大时造成安装困难。
其中，作为弹性连接件4的一种可选的排布方式，多个弹性连接件4可以间隔设置在屏幕板1的四周，比如分别对称方向等间隔设置。这样屏幕板1的上下左右四个方向均会受到弹性连接件4的拉力作用，因而屏幕板1在各个方向上均能够得到有效拉伸，保持平整状态。
此外，为了提升投影屏幕的外观美观度，可选的，屏幕板1的正面还设置有用于遮盖编织布的边缘的前装饰框(图中未示出)，前装饰框和屏幕框架3连接。这样前装饰框可以设置在屏幕框架3上，并将裸露在屏幕板1边缘外侧的编织布2遮盖起来，避免编织布2外露，从而让屏幕板1的正面外侧均为前装饰框，以有效提升投影屏幕的正面美观度。一般的，前装饰框和屏幕框架3的结构类似，均为矩形边框结构。
可选的，前装饰框的表面可以采用电镀、拉丝或者喷漆等表面处理工艺进行处理，以进一步提升其美观性。
可选的，前装饰框与屏幕框架3之间可以采用卡接、粘接或者螺纹紧固件 连接等本领域技术人员常用的连接方式。
本实施例中，投影屏幕具体包括硬质的屏幕板、软质的编织布、粘附层、围设在屏幕板的周侧的屏幕框架以及多个弹性连接件；屏幕板的正面为投影受光面，屏幕板的背面通过粘附层与编织布贴合，编织布覆盖屏幕板背面的与正面受光区域相对的区域，且编织布的边缘位于屏幕板的边缘范围之外，每个弹性连接件的第一端均与编织布的边缘连接，第二端与屏幕框架连接，以通过弹性连接件的拉力将编织布和屏幕板拉伸至平整状态。这样可以利用软质的编织布和弹性连接件实现屏幕板与屏幕框架之间的固定和定位，同时屏幕板能够依靠弹性连接件的弹性处于平整的伸展状态而不产生变形，进一步的，由于编织布具有的良好的透气性，不会在编织布和粘附层之间存在鼓包现象，进一步增加了屏幕板的平整性，投影画面质量较高。
实施例二
本申请实施例二还提供一种投影系统。本实施例提供的投影系统，具体包括投影装置和前述实施例一中的投影屏幕，投影装置用于向投影屏幕的屏幕板投射投影画面。其中，投影屏幕的具体结构、工作原理和作用均已在前述实施例一中进行了详细说明，此处不再赘述。
具体的，本实施例的投影系统中，投影装置可以为现有的各类投影仪，例如激光投影仪等。投影装置可以向投影屏幕的屏幕板投射出投影画面，这样屏幕板即可显示出投影画面，以供人们观看。其中，投影屏幕中的屏幕板可在弹性连接件的拉力作用下维持伸展状态，平整度较好，能够有效保证投影在屏幕板上的画面质量。
本实施例中，投影系统具体包括硬质的屏幕板、软质的编织布、粘附层、围设在屏幕板的周侧的屏幕框架以及多个弹性连接件；屏幕板的正面为投影受光面，屏幕板的背面通过粘附层与编织布贴合，编织布覆盖屏幕板背面的与正面受光区域对应的区域，且编织布的边缘位于屏幕板的边缘范围之外，每个弹性连接件的第一端均与编织布的边缘连接，第二端与屏幕框架连接，以通过弹性连接件的拉力将编织布和屏幕板拉伸至平整状态。这样可以利用软质的编织布和弹性连接件实现屏幕板与屏幕框架之间的固定和定位，同时屏幕板能够依靠弹性连接件的弹性处于平整的伸展状态而不产生变形，进一步的，由于编织布具有的良好的透气性，不会在编织布和粘附层之间存在鼓包现象，进一步增加了屏幕板的平整性，投影画面质量较高。
实施例三
本实施例提供一种实施例一所述的投影屏幕的装配方法，其中，投影屏幕的具体结构、工作原理和作用均已在前述实施例一中进行了详细说明，此处不再赘述。
图8是本申请实施例三提供的投影屏幕的装配方法的流程示意图，如图8所示，本实施例的投影屏幕的装配方法包括：
S10、将带有离型纸的粘附层粘贴在编织布上，离型纸位于粘附层的背离编织布的一侧。
一般而言，具有粘性的粘附层都附着在隔离件，例如离型纸上，离型纸又称隔离纸、防粘纸，是一种防止粘附料粘连，又可以保护粘附料不受污染的防粘纸，具体的，离型纸一般会粘贴在粘附层的一个表面上，上述步骤中，粘附层一侧粘贴在离型纸上，可以将粘附层的未设有离型纸的一侧通过辊压等方式 粘贴在编织布上，这样可以保证粘附层和编织布之间无缝贴合，并且，在此过程中，若编织布和粘附层之间出现气泡等情况，气体通过编织布而排出，避免在粘附层中产生鼓包，进一步增加了屏幕板的平整性。粘贴完毕后，离型纸位于粘附层的背离编织布的一侧。
S20、去除离型纸以露出粘附层，并将屏幕板贴合在粘附层的表面。
将离型纸去除后可以将粘附层的具有粘性的表面露出，通过辊压等方式将屏幕板贴合在粘附层的表面，以形成编织布+粘附层+屏幕板的结构。
S30、将编织布拉伸至平整状态。
例如可以将编织布的边缘和弹性连接件的第一端连接，并使弹性连接件的第二端和屏幕框架连接，以通过弹性连接件的拉力将编织布和屏幕板拉伸至平整状态。
本实施例中，投影屏幕的装配方法包括：将带有离型纸的粘附层粘贴在编织布上，离型纸位于粘附层的背离编织布的一侧；去除离型纸以露出粘附层，并将屏幕板贴合在粘附层的表面；将编织布拉伸至平整状态。在上述方法中，屏幕板通过粘附层而固定在编织布上，由于编织布所具有的良好透气性，因此不会在编织布和粘附层之间存在鼓包现象，进一步增加了屏幕板的平整性，投影画面质量较高。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (11)

  1. 一种投影屏幕，其特征在于，包括硬质的屏幕板、软质的编织布、粘附层、围设在所述屏幕板的周侧的屏幕框架以及多个弹性连接件；所述屏幕板的正面为投影受光面，所述屏幕板的背面通过所述粘附层与所述编织布贴合，所述编织布覆盖所述屏幕板背面的与正面受光区域对应的区域，且所述编织布的边缘位于所述屏幕板的边缘范围之外，每个所述弹性连接件的第一端均与所述编织布的边缘连接，第二端与所述屏幕框架连接，以通过所述弹性连接件的拉力将所述编织布和所述屏幕板拉伸至平整状态。
  2. 根据权利要求1所述的投影屏幕，其特征在于，所述粘附层覆盖于整个所述屏幕板的背面。
  3. 根据权利要求1所述的投影屏幕，其特征在于，所述编织布由不同织向的纤维交错编织而成，相邻所述纤维之间形成透气间隙。
  4. 根据权利要求1所述的投影屏幕，其特征在于，所述编织布的布料纤维规格为：经向800～1200D/36F、纬向800～1200D/36F。
  5. 根据权利要求4所述的投影屏幕，其特征在于，所述编织布的经向密度为11～17根/cm，纬向密度为9～15根/cm。
  6. 根据权利要求5所述的投影屏幕，其特征在于，所述编织布的抗撕裂强度为经向120～140N、纬向120～140N。
  7. 根据权利要求1-6任一项所述的投影屏幕，其特征在于，所述粘附层为无基材的胶膜。
  8. 根据权利要求7所述的投影屏幕，其特征在于，所述胶膜为黑色。
  9. 根据权利要求7所述的投影屏幕，其特征在于，所述胶膜的厚度为0.08～ 0.15mm。
  10. 一种投影系统，其特征在于，包括投影装置和权利要求1-9任一项所述的投影屏幕，所述投影装置用于向所述投影屏幕的屏幕板投射投影画面。
  11. 一种投影屏幕的装配方法，其特征在于，所述投影屏幕为权利要求1-9任一项所述的投影屏幕，所述方法包括：
    将带有离型纸的粘附层粘贴在所述编织布上，所述离型纸位于所述粘附层的背离所述编织布的一侧；
    去除所述离型纸以露出所述粘附层，并将所述屏幕板贴合在所述粘附层的表面；将所述编织布拉伸至平整状态。
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