WO2024088007A1 - 投影屏幕及投影设备 - Google Patents

投影屏幕及投影设备 Download PDF

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Publication number
WO2024088007A1
WO2024088007A1 PCT/CN2023/121972 CN2023121972W WO2024088007A1 WO 2024088007 A1 WO2024088007 A1 WO 2024088007A1 CN 2023121972 W CN2023121972 W CN 2023121972W WO 2024088007 A1 WO2024088007 A1 WO 2024088007A1
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WO
WIPO (PCT)
Prior art keywords
projection screen
support
support bar
projection
thermal expansion
Prior art date
Application number
PCT/CN2023/121972
Other languages
English (en)
French (fr)
Inventor
钟强
陈友才
杨长明
辛学祥
Original Assignee
青岛海信激光显示股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211339691.9A external-priority patent/CN115598912A/zh
Priority claimed from CN202310094352.7A external-priority patent/CN115933301A/zh
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 WO2024088007A1 publication Critical patent/WO2024088007A1/zh

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Classifications

    • 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

Definitions

  • the present application relates to the field of projection technology, and in particular to a projection screen and a projection device.
  • the laser projection system mainly includes: a projection screen and a projection device.
  • the projection screen is a device used to receive the image projected by the projector, and the projection device is used to project a projection beam to the projection screen to display the projection image on the projection screen.
  • the projection screen usually includes: a projection screen and a rolling mechanism.
  • One side of the projection screen is connected to the rolling mechanism, and the projection screen in the unfolded state can be retracted by controlling the rolling mechanism.
  • the projection screen is very likely to have edge curling or internal unevenness, resulting in distortion of the projected image on the projection screen, resulting in poor display effect of the projected image on the projection screen.
  • the present application provides a projection screen, the projection screen comprising: a projection screen, a rolling curtain assembly and a rolling drum assembly;
  • the rolling curtain assembly is located at the back of the projection screen, and the first end of the projection screen and the first end of the rolling curtain assembly are both connected to the roller assembly;
  • the rolling curtain assembly includes a plurality of support bars, and the plurality of support bars are arranged in sequence along the curling direction of the projection screen;
  • At least part of the support strips in the rolling curtain assembly have thermal expansion characteristics, and the ratio between the thermal expansion coefficient of the projection screen and the thermal expansion coefficient of at least part of the support strips having the thermal expansion characteristics is less than or equal to a target threshold, and the target threshold is greater than or equal to 1.
  • the present application provides a projection device, which includes a projector and any of the projection screens described above.
  • FIG1 is a rendering of a linear cursor image presented when the projection screen shown in the related art is not expanded by heat;
  • FIG2 is a rendering of a linear cursor image presented when a projection screen is heated and expanded as shown in the related art
  • FIG3 is a rear view of a first exemplary projection screen provided in an embodiment of the present application.
  • FIG4 is a side view of the projection screen shown in FIG3;
  • FIG5 is an effect diagram of a linear cursor image presented when the projection screen shown in FIG3 is not expanded by heat;
  • FIG6 is an effect diagram of a linear cursor image presented when the projection screen shown in FIG3 expands due to heat
  • FIG7 is a side view of a second exemplary projection screen provided in an embodiment of the present application.
  • FIG8 is a side view of a third exemplary projection screen provided in an embodiment of the present application.
  • FIG9 is a side view of a fourth exemplary projection screen provided in an embodiment of the present application.
  • FIG10 is a side view of a fifth exemplary projection screen provided in an embodiment of the present application.
  • FIG11 is a side view of a sixth exemplary projection screen provided in an embodiment of the present application.
  • FIG12 is a schematic structural diagram of a seventh exemplary projection screen provided in an embodiment of the present application.
  • FIG13 is a schematic diagram of a connection between a tension rope and a support bar provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of a connection between a support bar and a projection screen provided in an embodiment of the present application.
  • FIG15 is a dimension diagram of a projection screen in an unfolded state provided by an embodiment of the present application.
  • FIG16 is a side view of an eighth exemplary projection screen provided in an embodiment of the present application.
  • FIG17 is a side view of a ninth exemplary projection screen provided in an embodiment of the present application.
  • FIG18 is a side view of a ninth exemplary projection screen provided in an embodiment of the present application.
  • FIG19 is a schematic diagram of an enlarged structure of a partial area of the projection screen shown in FIG18;
  • FIG20 is a schematic diagram of the structure of a first exemplary flexible support strip in a projection screen provided in an embodiment of the present application
  • FIG21 is a schematic diagram of the structure of a second exemplary flexible support strip in a projection screen provided in an embodiment of the present application.
  • FIG22 is a side view of a tenth exemplary projection screen provided in an embodiment of the present application.
  • FIG23 is a schematic diagram of an enlarged structure of a partial area of the projection screen shown in FIG22;
  • FIG24 is a side view of an eleventh exemplary projection screen provided in an embodiment of the present application.
  • FIG25 is a side view of a twelfth exemplary projection screen provided in an embodiment of the present application.
  • FIG26 is a schematic structural diagram of a thirteenth exemplary projection screen provided in an embodiment of the present application.
  • FIG27 is a schematic diagram of the left structural view of the support bar in the projection screen shown in FIG26;
  • FIG28 is a schematic structural diagram of a fourteenth exemplary projection screen provided in an embodiment of the present application.
  • FIG29 is a schematic structural diagram of a fifteenth exemplary projection screen provided in an embodiment of the present application.
  • FIG30 is a schematic diagram of the structure of a laser projection device provided in an embodiment of the present application.
  • FIG. 31 is a schematic diagram of the structure of another laser projection device provided in an embodiment of the present application.
  • the reference numerals represent: 000, projection screen; 100, reel assembly; 101, first reel; 102, second reel; 103, third reel; 200, projection screen; 2000, screen body; 300, rolling shutter assembly; 30.
  • Support bar group 400, connecting part; 401, connecting sheet; 402, connecting strip; 400a, magnetic sheet; 4001, first magnetic structure; 4002, second magnetic structure; 4003, third magnetic structure; 500, base; 600, lifting mechanism; 601, beam; 001.
  • a plurality of support bars 20 may be provided on the back of the projection screen 10.
  • the thermal/humid expansion coefficient of the support bar 20 is much smaller than that of the projection screen 10.
  • the thermal expansion coefficient of the carbon fiber sheet is usually 0.57 microstrain/degree
  • the thermal expansion coefficient of the projection screen 10 is usually 60 microstrain/degree.
  • the degree of thermal expansion of the projection screen 10 in the projection screen 00 is much greater than that of the carbon fiber sheet.
  • the projection screen 10 is heated and expanded, and pressure is applied to the plurality of carbon fiber sheets with a smaller expansion degree, so that the carbon fiber sheets are buckled and deformed, resulting in poor flatness of the front of the projection screen 10 connected to the carbon fiber sheet.
  • the projection image presented on the front of the projection screen 10 still has problems such as distortion, which leads to poor display effect of the projection image on the projection screen 10.
  • the distance between each two adjacent carbon fiber sheets is usually set larger.
  • this will result in that only the flatness of the area where a smaller part of the projection screen 10 is located can be improved, that is, the improvement effect of the carbon fiber sheet on the overall strength of the projection screen 10 is limited.
  • Figure 1 is a rendering of a linear cursor image presented when the projection screen shown in the related art is not thermally expanded
  • Figure 2 is a rendering of a linear cursor image presented when the projection screen shown in the related art is thermally expanded.
  • each support bar 20 can effectively support the projection screen 10, ensuring that the flatness of the front of the projection screen 10 is good, and the cursor image 30 presented on the projection screen 10 is not significantly distorted.
  • each support bar 20 will bend and deform under the influence of the thermal expansion of the projection screen 10, resulting in poor flatness of the front of the projection screen 10, and the cursor image 30 presented on the projection screen 10 will be significantly distorted.
  • Figure 3 is a rear view of a projection screen provided by an embodiment of the present application
  • Figure 4 is a side view of a projection screen provided by an embodiment of the present application.
  • Figures 3 and 4 both illustrate that the multiple support bars 30 in the rolling curtain assembly 300 are all support bars 30 with thermal expansion characteristics (the support bars 30 can also be called rolling curtain pieces).
  • the projection screen 000 includes: a roller assembly 100, a projection screen 200, and a rolling curtain assembly 300.
  • the rolling curtain assembly 300 is located on the back of the projection screen 200.
  • the first end of the projection screen 200 and the first end of the rolling curtain assembly 300 are both connected to the roller assembly 100.
  • the rolling curtain assembly 300 includes a plurality of support bars 30, and the plurality of support bars 30 are sequentially arranged along the curling direction of the projection screen 200. At least some of the support bars 30 in the rolling curtain assembly 300 have thermal expansion characteristics, and the support bars 30 with thermal expansion characteristics meet the following conditions: the ratio between the thermal expansion coefficient of the projection screen 200 and the thermal expansion coefficient of at least some of the support bars 30 with thermal expansion characteristics is less than or equal to a target threshold, wherein the target threshold is greater than or equal to 1.
  • At least a portion of the projection screen 200 in the projection screen 000 can be rolled up and wound on the roller assembly 100, and the front of the projection screen 200 can be used to display the projection image.
  • the rolling curtain assembly 300 is located at the back of the projection screen 200, and the multiple support bars 30 in the rolling curtain assembly 300 can all be fixedly connected to the back of the projection screen 200.
  • the support strips 30 in the rolling shutter assembly 300 has thermal expansion characteristics, and at least part of the support strips 30 with thermal expansion characteristics are made of materials with thermal expansion characteristics.
  • the support strip 30 with thermal expansion characteristics includes a first part and a second part, and one of the first part and the second part is made of a material with thermal expansion characteristics, or the entire support strip 30 with thermal expansion characteristics is made of a material with thermal expansion characteristics.
  • a ratio between a coefficient of thermal expansion of the projection screen 200 and a coefficient of thermal expansion of a portion of the support bar 30 having the thermal expansion feature is less than or equal to a target threshold.
  • Another example is that the ratio of the thermal expansion coefficient of the projection screen 200 to the thermal expansion coefficient of the entire support bar 30 having thermal expansion characteristics is less than or equal to the target threshold.
  • the target threshold is greater than or equal to 1, that is, the thermal expansion coefficient of the projection screen 200 is greater than or equal to the thermal expansion coefficient of at least a portion of the support strip 30 having the thermal expansion characteristic, so as to ensure that the thermal expansion characteristic Even if the support strip 30 with the characteristic expands due to heat, its thermal expansion degree is always less than or equal to the thermal expansion degree of the projection screen 200, so that the support strip 30 with the characteristic of thermal expansion always stably supports the projection screen 200.
  • the value of the target threshold may be 3.
  • the ratio between the thermal expansion coefficient of the projection screen 200 and the thermal expansion coefficient of the support bar 30 having thermal expansion characteristics includes but is not limited to 3, 2.5, 2, 1.5, 1.4, 1.3, 1.2, 1.1, 1, etc.
  • a plurality of support bars 30 with thermal expansion characteristics fixedly connected to the back of the projection screen 200 are arranged along the curling direction of the projection screen 200, and the ratio between the thermal expansion coefficient of the projection screen 200 and the thermal expansion coefficient of at least a portion of the support bars 30 with thermal expansion characteristics is less than or equal to the target threshold, so that the thermal expansion coefficient of the projection screen 200 is close to the thermal expansion coefficient of the support bars 30 with thermal expansion characteristics.
  • the degree of thermal expansion of the projection screen 200 is close to the degree of thermal expansion of the support bars 30 with thermal expansion characteristics.
  • the pressure applied to the support strips 30 with thermal expansion characteristics is relatively small, so that the support strips 30 with thermal expansion characteristics produce a smaller degree of buckling deformation, thereby allowing the multiple support strips 30 with thermal expansion characteristics to effectively support the projection screen 200.
  • the probability of the projection screen 200 having edge curling or internal unevenness is effectively reduced.
  • the structural strength and bending stiffness of the projection screen 200 are respectively less than the structural strength and bending stiffness of at least a portion of the support strip 30 with thermal expansion characteristics.
  • the structural strength and bending stiffness of a partial area of the support strip 30 with thermal expansion characteristics are greater than the structural strength and bending stiffness of the projection screen 200, or the structural strength and bending stiffness of the entire area of the support strip 30 with thermal expansion characteristics are greater than the structural strength and bending stiffness of the projection screen 200.
  • the thickness of the support bar 30 with thermal expansion characteristics can be greater than the thickness of the projection screen 200 in the direction perpendicular to the back of the projection screen 200.
  • the "thickness" shown here refers to the direction perpendicular to the back of the projection screen 200.
  • the above method can easily achieve that the structural strength and bending stiffness of the support bar 30 with thermal expansion characteristics are greater than the structural strength and bending stiffness of the projection screen 200, so as to ensure that the support bar 30 can effectively support the projection screen 200, and further ensure that the flatness of the front of the projection screen 200 is good, effectively reducing the probability of distortion and other undesirable problems of the projection picture presented on the front of the projection screen 200.
  • Figure 5 is a rendering of a linear cursor image presented when the projection screen 200 shown in Figure 3 is not expanded by heat
  • Figure 6 is a rendering of a linear cursor image presented when the projection screen 200 shown in Figure 3 is expanded by heat.
  • each support bar 30 having thermal expansion characteristics can effectively support the projection screen 200, ensuring good flatness of the front surface of the projection screen 200.
  • a long strip cursor image A1 is projected on the projection screen 200, and the cursor image A1 extends along the curling direction of the projection screen 200, and the long strip cursor image A1 does not undergo obvious distortion.
  • the buckling deformation degree of the projection screen 200 is close to that of the support strip 30 with thermal expansion characteristics, so as to ensure that the support strip 30 with thermal expansion characteristics can effectively support the projection screen 200, thereby ensuring that the flatness of the front of the projection screen 200 is good.
  • a long cursor image A2 is projected on the projection screen 200, and the long cursor image A2 is also not significantly distorted.
  • the spacing between each two adjacent support strips 30 with thermal expansion characteristics among the plurality of support strips 30 with thermal expansion characteristics can be set to satisfy the requirement of keeping the area corresponding to the plurality of support strips 301 with thermal expansion characteristics on the projection screen 200 flat, for example, the ratio of the spacing between two adjacent support strips 30 with thermal expansion characteristics to the width of the support strip 301 with thermal expansion characteristics is 1:(0.5-2), so that the spacing is small, and thus the projection screen can be smooth.
  • the flatness of the corresponding area in 200 is effectively improved.
  • the materials of the projection screen 200 and the support bar 30 with thermal expansion characteristics can be the same or different.
  • the projection screen 200 and the support bar 30 with thermal expansion characteristics are made of the same material, which includes: the material of the projection screen 200 and at least part of the material of the support bar 30 with thermal expansion characteristics are both polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the entire region of the support bar 30 having the thermal expansion feature may be made of PET material, or at least a portion of the region of the support bar 30 having the thermal expansion feature may be made of PET material, for example, as described below, the support bar main structure 301 of the support bar 30 is a hard structure made of PET material, so that the support bar main structure 301 has the thermal expansion feature.
  • the connection structure 302 of the support bar 30 is a flexible material made of other flexible materials different from PET material.
  • the thickness and width of the support strips 30 with thermal expansion characteristics and the distance between every two adjacent support strips 30 with thermal expansion characteristics can be set according to the size of the projection screen 200 and the winding diameter of the projection screen 200 .
  • the portion of the projection screen 200 that is wound on the roll assembly 100 is prone to creep, while the portion that is not wound on the roll assembly 100 is less likely to creep. Therefore, the corresponding area of the projection screen 200 that is not wound on the roll assembly 100 may not be provided with a support bar 30 with a thermal expansion feature, or the spacing between two adjacent support bars 30 with a thermal expansion feature may be designed to be larger. In this way, the number of support bars 30 with a thermal expansion feature used can be reduced, thereby reducing the overall weight of the projection screen 200.
  • the projection screen 200 and the support bar 30 with thermal expansion characteristics may also be made of other materials different from polyethylene terephthalate, as long as the thermal expansion coefficient of the projection screen 200 and the thermal expansion coefficient of the support bar 30 are similar.
  • the embodiment of the present application does not make any specific limitation on this.
  • FIG7 is a side view of another projection screen provided in an embodiment of the present application.
  • the projection screen 200 and the support bars 30 with thermal expansion characteristics in the projection screen 000 are an integrally formed structure, that is, the two are an integrally formed structure.
  • the projection screen 200 and the support bars 30 with thermal expansion characteristics can be formed simultaneously through a one-time injection molding process. In this way, the connection process between the projection screen 200 and the support bars 30 with thermal expansion characteristics in the projection screen 000 can be effectively simplified, and the connection accuracy between the projection screen 200 and the plurality of support bars 30 can be effectively guaranteed.
  • At least a portion of the support strips 30 in the rolling blind assembly 300 provided in the embodiment of the present application has a flexible feature, and at least a portion of the support strips 30 having the flexible feature is a flexible structure.
  • the flexible feature makes at least a portion of the support bar 30 a flexible structure, that is, a partial area of the support bar 30 having the flexible feature is a flexible structure, or the entire area is a flexible structure.
  • the support bar 30 with a flexible structure is a hard-soft combination support bar 30 a
  • a partial area of the hard-soft combination support bar 30 a is a flexible structure.
  • the support bars 30 are hard support bars 30 b , and the entire area of the hard support bars 30 b is a rigid structure.
  • the support bar 30 with flexible characteristics can reduce its wear and extrusion force on the projection screen 200, thereby solving the problem of easy damage of the projection screen in the related art and improving the protection effect of the projection screen 200.
  • the support strip 30 having a flexible feature reduces its squeezing force on the projection screen 200 , it is possible to avoid indentations on the projection screen 200 , thereby improving the display effect of the projection screen 200 .
  • the provision of the support strip 30 with flexible characteristics can also enhance the curling ability of the roller blind assembly 300, reduce the curling radius of the projection screen, and reduce the volume of the roller assembly 100, which is conducive to the miniaturization of the projection screen.
  • the rolling blind assembly 300 may have various implementations, as shown below:
  • all support bars 30 in the roller blind assembly 300 have thermal expansion features.
  • These support bars 30 may have flexible features or may not have flexible features.
  • An example is that the roller blind assembly 300 All the support bars 30 have thermal expansion characteristics and do not have flexible characteristics. Taking the projection screen shown in Figure 3 as an example, it illustrates that all the support bars 30 in the roller blind assembly 300 are support bars 30 with thermal expansion characteristics. These support bars 30 do not have flexible characteristics, making them hard support bars.
  • a plurality of support bars 30 with thermal expansion characteristics are arranged at intervals from each other, and the spacing between any two adjacent support bars 30 can be referred to as shown above, and will not be repeated here.
  • the support bar 30 with thermal expansion characteristics can be a rectangular strip structure, which makes it easy to shape and prepare, and is conducive to controlling the size in all directions.
  • the roller blind assembly 300 includes a first portion of support bars and a second portion of support bars, the first portion of support bars having at least a thermal expansion feature, and the second portion of support bars having a flexible feature and not having a thermal expansion feature.
  • This implementation may further include the following examples:
  • the first portion of the support strip has a thermal expansion feature and no flexibility feature
  • the second portion of the support strip has a flexibility feature and no thermal expansion feature
  • the roller blind assembly 300 shown in Example (2) includes two types of support bars 30.
  • the first type of support bar is a support bar 30 having a thermal expansion feature but no flexibility feature
  • the second type of support bar is a support bar 30 having a flexibility feature but no thermal expansion feature.
  • the arrangement positions of different types of support strips on the projection screen 200 are determined according to the requirements of each area of the projection screen 200 for buckling deformation caused by thermal expansion and wear resistance requirements such as indentation.
  • the first type of support bars and the second type of support bars may be arranged independently in different regions, or the first type of support bars may be mixed with part or all of the second type of support bars.
  • a first type of support bar and a second type of support bar may be arranged alternately in sequence.
  • two or more first type of support bars may be arranged alternately in sequence to form a first support bar group, and the first support bar group may be arranged alternately with a second type of support bar or at least two second type of support bars.
  • two or more second type of support bars may be arranged alternately in sequence to form a second support bar group, and the second support bar group may be arranged alternately with a first type of support bar.
  • a first portion of the support strip has a thermal expansion feature and a portion of the support strip 30 has a flexible feature, and a second portion of the support strip has a flexible feature and does not have a thermal expansion feature.
  • the roller blind assembly 300 shown in Example (3) includes three types of support strips 30.
  • the first type of support strip is a support strip 30 having a thermal expansion feature but not a flexible feature.
  • the second type of support strip is a support strip 30 having a flexible feature but not a thermal expansion feature.
  • the third type of support strip is a support strip 30 having both a thermal expansion feature and a flexible feature.
  • the arrangement positions of different types of support strips on the projection screen 200 are determined according to the requirements of each area of the projection screen 200 for buckling deformation caused by thermal expansion and wear resistance requirements such as indentation.
  • the first type of support bars, the second type of support bars, and the third type of support bars can be arranged independently in different regions, or any two or three of the first type of support bars, the second type of support bars, and the third type of support bars can be arranged in a mixed manner.
  • One or more first type of support bars are arranged in sequence to form a first support bar group, one or more second type of support bars are arranged in sequence to form a second support bar group, one or more third type of support bars are arranged in sequence to form a third support bar group, and any two or three of the first support bar group, the second support bar group, and the third support bar group are arranged in a mixed manner.
  • a first portion of the support bars have thermal expansion characteristics and all of the support bars 30 also have flexible characteristics, and a second portion of the support bars have flexible characteristics and do not have thermal expansion characteristics.
  • the roller blind assembly 300 shown in Example (4) includes two types of support strips 30.
  • the first type of support strips are support strips 30 having both thermal expansion characteristics and flexibility characteristics, and the second type of support strips are support strips 30 having flexibility characteristics but no thermal expansion characteristics.
  • the arrangement positions of different types of support strips on the projection screen 200 are determined according to the requirements of each area of the projection screen 200 for buckling deformation caused by thermal expansion and wear resistance requirements such as indentation.
  • the first type of support bars and the second type of support bars may be arranged independently in different regions, or the first type of support bars may be mixed with part or all of the second type of support bars.
  • a first type of support bar and a second type of support bar may be arranged alternately in sequence.
  • two or more first type of support bars may be arranged alternately in sequence to form a first support bar group, and the first support bar group may be arranged alternately with a second type of support bar or at least two second type of support bars.
  • two or more second type of support bars may be arranged alternately in sequence to form a second type of support bar group.
  • Two support bar groups, the second support bar group and a first type support bar are arranged alternately in sequence.
  • all support bars 30 in the rolling blind assembly 300 have a thermal expansion feature, and at least some support bars 30 in the rolling blind assembly 300 also have a flexible feature.
  • This implementation may further include the following examples:
  • all the support bars 30 in the rolling blind assembly 300 have a thermal expansion feature, and some of the support bars 30 in the rolling blind assembly 300 also have a flexible feature.
  • the roller blind assembly 300 shown in Example (5) includes two types of support strips 30.
  • the first type of support strips are support strips 30 having both thermal expansion characteristics and flexibility characteristics, and the second type of support strips are support strips 30 having thermal expansion characteristics but no flexibility characteristics.
  • the arrangement positions of different types of support strips on the projection screen 200 are determined according to the requirements of each area of the projection screen 200 for buckling deformation caused by thermal expansion and wear resistance requirements such as indentation.
  • the first type of support bars and the second type of support bars may be arranged independently in different regions, or the first type of support bars may be mixed with part or all of the second type of support bars.
  • a first type of support bar and a second type of support bar may be arranged alternately in sequence.
  • two or more first type of support bars may be arranged alternately in sequence to form a first support bar group, and the first support bar group may be arranged alternately with a second type of support bar or at least two second type of support bars.
  • two or more second type of support bars may be arranged alternately in sequence to form a second support bar group, and the second support bar group may be arranged alternately with a first type of support bar.
  • all the support bars 30 in the rolling blind assembly 300 have a thermal expansion feature, and all the support bars 30 in the rolling blind assembly 300 also have a flexible feature.
  • the rolling blind assembly 300 shown in Example (6) includes a type of support bar 30, which is a support bar 30 having both thermal expansion characteristics and flexibility characteristics.
  • a plurality of support bars 30 with thermal expansion characteristics and flexible characteristics are arranged at intervals from each other, and the spacing between any two adjacent support bars 30 can be referred to as shown above, which will not be repeated here.
  • a plurality of support bars 30 with thermal expansion characteristics and flexible characteristics are arranged to be fixedly connected end to end.
  • the flexible structure involved in the support bar 30 with flexible characteristics can be obtained by using a flexible material, can also be obtained by using an elastic structure, and can also be obtained by using a combination of a flexible material and an elastic structure.
  • Flexible materials refer to materials that have elasticity, such as some rubber materials, etc. Thus, by using flexible materials to prepare flexible structures, flexible characteristics can be given to them.
  • Elastic structures refer to structures that are designed to be elastically deformable along the curling direction of the projection screen 200, such as thin-walled arms, sheets, hollow rings, hollow arcs, etc. Thus, by using target materials to prepare flexible structures and designing them as elastic structures, flexible characteristics can be given to the flexible structures.
  • the target material can be a hard material or a flexible material.
  • the elastic structure can be prepared by using such a material with thermal expansion characteristics, so that the ratio between the thermal expansion coefficient of the flexible structure and the thermal expansion coefficient of the projection screen 200 is greater than or equal to the target threshold.
  • the "target threshold" involved here is consistent with the aforementioned one and will not be repeated here. It can be seen that this solution is applicable to the support strip 30 having both flexible characteristics and thermal expansion characteristics.
  • the support bar 30 with flexible features may be arranged at intervals or connected end to end with the adjacent support bar 30.
  • the support bar 30 with flexible features may be a flexible structure as a whole or a flexible structure in part.
  • the "adjacent support bar 30" referred to herein may be a support bar 30 with flexible features but not having thermal expansion features, a support bar 30 with thermal expansion features but not having flexible features, or a support bar 30 with both flexible features and thermal expansion features.
  • the support bar 30 with flexible features is arranged at intervals with adjacent support bars 30 (see FIGS. 3-15 ), and the support bar 30 with flexible features can be made of flexible material.
  • the support bar 30 with flexible features can be designed to be thin sheet or ring-shaped.
  • the support bar 30 with flexible characteristics is movably connected to the adjacent support bar 30 at the end (see Figures 17-29). Then, the support bar 30 with flexible characteristics may include a connecting structure 302 for connecting with the adjacent support bar 30.
  • roller blind assembly 300 there is a scheme in which the support strips 30 with flexible characteristics are arranged at intervals with adjacent support strips 30, and there is also a scheme in which the support strips 30 with flexible characteristics are movably connected to the adjacent support strips 30 end to end (see Figure 16).
  • the support bar 30 having flexible characteristics is a soft-hard combination support bar 30a, which includes: a support bar main structure 301 and two connecting structures 302 respectively located at both ends of the support bar main structure 301, at least one of the support bar main structure 301 and the two connecting structures 302 is a flexible structure, and one structure is a hard structure; the hard structure is obtained by hard material and/or rigid structure.
  • the support bar with flexible characteristics is connected to the adjacent support bar through the connecting structure 302.
  • the "adjacent support bar 30" referred to herein may be a support bar 30 with flexible characteristics but not having thermal expansion characteristics, a support bar 30 with thermal expansion characteristics but not having flexible characteristics, or a support bar 30 with both flexible characteristics and thermal expansion characteristics.
  • a hard material refers to a material that is rigid and not easily deformed.
  • a rigid structure refers to a structure that is designed so that it cannot be elastically deformed along the curling direction of the projection screen 200, such as a thick-walled structure.
  • the rigid structure can be prepared by using such a material with thermal expansion characteristics, so that the ratio between the thermal expansion coefficient of the rigid structure and the thermal expansion coefficient of the projection screen 200 is greater than or equal to the target threshold.
  • the "target threshold" involved here is consistent with the aforementioned one and will not be repeated here. It can be seen that this solution is applicable to the support bar 30 having both flexible characteristics and thermal expansion characteristics.
  • the rolling curtain assembly included in the projection screen provided in the embodiments of the present application is a soft-hard rolling curtain assembly, that is, the rolling curtain assembly includes a hard structure and a flexible structure.
  • This soft-hard rolling curtain assembly can reduce the damage of the rolling curtain assembly to the projection screen while ensuring the support for the projection screen, and improve the bending performance of the rolling curtain assembly, so as to facilitate the miniaturization of the projection screen.
  • the soft-hard rolling curtain assembly can have a variety of structures, which are described below.
  • part of the structure of the support strip in the rolling shutter assembly may be a flexible structure, and another part of the structure may be a hard structure.
  • Figure 18, is a structural schematic diagram of a projection screen provided in an embodiment of the present application
  • Figure 19 is an enlarged structural schematic diagram of a partial area of the projection screen shown in Figure 18 (an enlarged structural schematic diagram of area q1 in Figure 18).
  • the support strips 30 in the roller blind assembly 300 shown in Figures 18 and 19 not only have flexibility, but also can make at least a portion of the support strips 30 have thermal expansion characteristics. As shown in the above-mentioned example (6), all the support strips 30 have both thermal expansion characteristics and flexibility characteristics, which can be prepared by using a material with thermal expansion characteristics to obtain the entire or a portion of the support strip 30 with flexibility characteristics, and the structure of the support strip 30 with flexibility characteristics is shown below.
  • the support bar 30 with flexible characteristics includes: a support bar main structure 301 and two connecting structures 302 respectively located at both ends of the support bar main structure 301, at least one of the support bar main structure 301 and the two connecting structures 302 is a flexible structure, and one structure is a hard structure; the hard structure is obtained by hard material and/or rigid structure.
  • the support strip 30 with flexible features can be a combination of soft and hard support strips.
  • the support strip 30 with flexible features can improve its flexibility while ensuring the support effect of the support strip 30 with flexible features on the projection screen 200, so that the projection screen 200 can maintain a relatively high degree of flatness, especially the flatness of the edge area of the projection screen.
  • the flexible material includes at least one of silicone, thermoplastic elastomer (TPE), thermoplastic polyurethane rubber (TPU), polyvinyl chloride (PVC) modified soft rubber and polyvinyl chloride modified rubber.
  • TPE thermoplastic elastomer
  • TPU thermoplastic polyurethane rubber
  • PVC polyvinyl chloride
  • the hard material includes at least one of polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, carbon fiber, aluminum alloy, polycarbonate (PC) and polyvinyl chloride.
  • the above-mentioned flexible material and hard material may also include other materials in the art, and the embodiments of the present application are not limited to this.
  • the material of the hard structure in the support bar 30 with flexible characteristics is a material with thermal expansion characteristics, such as polyethylene terephthalate, or the material of both the hard structure and the flexible structure of the support bar 30 with flexible characteristics are materials with thermal expansion characteristics, such as polyethylene terephthalate.
  • the flexible structure in the support bar 30 having a flexible characteristic if the material thereof is polyethylene terephthalate, the polyethylene terephthalate material can be designed as an elastic structure so that it can be elastically deformed along the curling direction of the projection screen 200, for example, the thin-walled arm, Sheets, hollow rings, hollow arcs, etc. In this way, the flexible structure of the support bar 30 with flexible characteristics also has thermal expansion characteristics.
  • the polyethylene terephthalate material can be designed with a thick wall structure to maintain the rigidity of the material itself. In this way, the hard structure of the support bar 30 with flexible characteristics also has the thermal expansion characteristics.
  • a support bar 30 with flexible characteristics is a soft-hard combination support bar 30a, wherein the support bar main structure 301 is a hard structure, one of the two connecting structures 302 is a hard structure, and the other connecting structure 302 is a flexible structure.
  • connection structure 302 is a circular structure (the connection structure 302 at the lower end of the support bar 30 with flexible features in FIG19 is a circular structure, which can be a ball head structure or a cylindrical structure), and the other connection structure 302 is a C-shaped mouth structure (the connection structure 302 at the upper end of the support bar 30 with flexible features in FIG19 is an arc-shaped groove structure), wherein the circular structure can be a flexible structure, and the C-shaped mouth structure and the support bar main body structure 301 are hard structures.
  • This structure makes one end of the support bar 30 with flexible features flexible, and can bend with the rolling curtain assembly when it bends, thereby improving the bending performance of the rolling curtain assembly, reducing the bending radius of the rolling curtain assembly, and facilitating the miniaturization of the projection screen.
  • FIG20 Another support bar 30 with flexible characteristics is a hard-soft support bar 30a, as shown in FIG20 , wherein the support bar main structure 301 is a hard structure, and the two connection structures 302 in the hard-soft support bar 30a are flexible structures. That is, the support bar main structure 301 in the middle of the hard-soft support bar 30a is a hard structure, and the connection structures 302 at both ends for connecting with other support bars are flexible structures.
  • Both ends of the support strip 30 with flexible features are flexible and can bend along with the rolling shutter assembly 300 when it bends, thereby improving the bending performance of the rolling shutter assembly 300 and reducing the bending radius of the rolling shutter assembly 300, which is beneficial to the miniaturization of the projection screen (the miniaturization may refer to the miniaturization of the projection screen in the storage state), and can reduce the pressure exerted by the rolling shutter assembly 300 on the projection screen 200 in the storage state, thereby reducing the risk of damage to the projection screen 200 and increasing the service life of the projection screen 200.
  • the friction of the flexible structure is relatively large, this is conducive to improving the friction between the connecting structure 302 of the support bar 30 with flexible characteristics and the connecting structure 302 of the adjacent support bar 30 connected thereto (the adjacent support bar 30 can be a support bar 30 with flexible characteristics or a hard support bar 30), thereby reducing the possibility of the two support bars 30 being offset in the lateral direction (the lateral direction can refer to the direction parallel to the axis of the reel assembly).
  • Another support bar 30 with flexible characteristics is a soft-hard combination support bar 30a, as shown in FIG21, wherein the support bar main structure 301 is a flexible structure, and the two connection structures 302 in the support bar 30 with flexible characteristics are hard structures. That is, the connection structures 302 at both ends of the support bar 30 with flexible characteristics are hard structures, and the middle support bar main structure 301 is a flexible structure.
  • the middle support bar main structure 301 can bend with the rolling curtain assembly 300 when it bends, thereby improving the bending performance of the rolling curtain assembly 300, reducing the bending radius of the rolling curtain assembly 300, and facilitating the miniaturization of the projection screen. It can also reduce the pressure exerted by the rolling curtain assembly 300 on the projection screen 200 in the storage state, reduce the risk of damage to the projection screen 200, and increase the service life of the projection screen.
  • the plurality of support strips 30 with flexible features may include at least one of the plurality of support strips 30 with flexible features mentioned above, that is, the structures of the plurality of support strips 30 with flexible features in the rolling curtain assembly 300 may be the same, or the structures of the plurality of support strips 30 with flexible features in the rolling curtain assembly 300 may not be completely the same.
  • each support bar 30 in the rolling shutter assembly 300 can be the above-mentioned support bar 30 with flexible characteristics, and then each support bar 30 is a soft-hard combination support bar 30a, which can improve the overall bending performance of the rolling shutter assembly 300 and reduce the possibility of each support bar 30 damaging the projection screen.
  • some of the support bars are soft-hard combination support bars 30a, and the remaining support bars 30 may be hard support bars 30b made of hard material.
  • FIG. 16 also shows that the adjacent soft-hard combination support bars 30a are movably connected end to end, and that the adjacent hard support bars 30b are arranged at a certain interval.
  • the plurality of support bars 30 in the rolling blind assembly 300 include a plurality of support bar groups g, the support bar group g includes at least two connected support bars 30, and each support bar group g includes at least one support bar 30 with flexible characteristics (for example, a soft-hard combination support bar 30a) and at least one hard support bar 30b.
  • the preparation method of the soft-hard combination support bar 30a and the hard support bar 30b is as shown above.
  • some support strips are support strips 30 with flexible characteristics (for example, soft-hard combination support strips 30a), and some support strips are hard support strips 30b, and the support strips 30 with flexible characteristics are distributed at multiple positions in the rolling shutter assembly 300, so that each position of the rolling shutter assembly 300 can be flexible, thereby improving the overall flexibility of the rolling shutter assembly 300.
  • the support bar group g includes two connected support bars 30, and each support bar group g includes a soft-hard combination support bar 30a and a hard support bar 30b.
  • the soft-hard combination support bar 30a and the hard support bar 30b are arranged alternately in the rolling curtain assembly 300, so that the uniformity of the distribution of the support bars 30 with flexible characteristics in the rolling curtain assembly 300 can be improved, so that each area of the rolling curtain assembly 300 has a certain flexibility, further avoiding the possibility of the rolling curtain assembly 300 damaging the projection screen, and improving the protective effect of the rolling curtain assembly 300 on the projection screen.
  • each support bar group g can also include a larger number of support bars 30.
  • the number of support bars 30 with flexible characteristics and hard support bars 30b in each support bar group g can also be other numbers.
  • Figure 24 is a structural schematic diagram of another projection screen provided in an embodiment of the present application, wherein each support bar group g can include 3 support bars 30, and each support bar group g includes two soft-hard combination support bars 30a and one hard support bar 30b.
  • each support bar group g may include four support bars, and each support bar group g includes two soft-hard combination support bars 30 a and two hard support bars 30 b .
  • Figures 22 to 25 illustrate that two adjacent support bars 30 in each support bar group g, and two adjacent support bar groups g, are movably connected by means of the connecting structure 302, it is not excluded that two adjacent support bars 30 and at least one of two adjacent support bar groups g may also be arranged at a certain interval.
  • each support bar in the first type of rolling blind assemblies 300 is a support bar 30 with flexible characteristics (for example, a soft-hard combination support bar 30a)
  • the second type of rolling blind assemblies 300 may include a plurality of hard support bars 30b and a plurality of support bars 30 with flexible characteristics (for example, a soft-hard combination support bar 30a), and the hard support bars 30b and the support bars 30 with flexible characteristics are arranged alternately or at intervals.
  • the embodiment of the present application further provides a projection screen 000, in which the rolling blind assembly 300 includes a plurality of support bars 30, the plurality of support bars 30 include a plurality of support bar groups g, the support bar group g includes at least two connected support bars 30, and each support bar group g includes at least one support bar 30 with flexible characteristics (for example, a soft-hard combination support bar 30a) and at least one hard support bar 30b.
  • the structure of the support bar 30 with flexible characteristics in the projection screen 000 provided in the embodiment of the present application can refer to the following examples.
  • a support bar 30 with flexible features comprising a support bar main structure 301 and two connection structures 302 respectively located at both ends of the support bar main structure 301, wherein at least one of the support bar main structure 301 and the two connection structures 302 is a flexible structure, such as a flexible structure comprising a flexible material, and at least one is a hard structure, such as a hard structure comprising a hard material.
  • the support bar 30 with flexible features is a soft-hard combination support bar 30a, so that the support bar 30 with flexible features can be improved on the basis of improving the flexibility of the support bar 30 with flexible features, thereby ensuring the support effect of the support bar 30 with flexible features on the projection screen, so that the projection screen can maintain a high degree of flatness, especially the flatness of the edge area of the projection screen.
  • the support bar main structure 301 is a hard structure
  • the two connecting structures 302 in the support bar 30 with flexible features are flexible structures. Since the friction force of the flexible structure is relatively large, under this structure, the friction force between the connecting structure 302 of the support bar 30 with flexible features and the connecting structure 302 of the connected support bar is increased, thereby reducing the possibility of the two support bars being offset in the lateral direction.
  • the main structure 301 of the support bar is a flexible structure, and the two connecting structures 302 are hard structures.
  • FIG. 8 is a side view of another projection screen provided in an embodiment of the present application.
  • the projection screen 000 may further include: a connecting portion 400 for connecting the projection screen 200 and the rolling curtain assembly 300, the connecting portion 400 being fixedly connected to the back of the projection screen 200 and the plurality of support bars 30 in the rolling curtain assembly 300, respectively.
  • the thickness of the connecting portion 400 is less than the thickness of the projection screen 200, and less than the thickness of the support bars 30.
  • a connection part 400 is provided between the projection screen 200 and the support bars 30 to fix the plurality of support bars 30 on the back of the projection screen 200.
  • the projection screen 200 and the support bars 30 can be made separately and then assembled together through a connection process, and the organization state and performance of the projection screen 200 and the support bars 30 will not change.
  • the thickness of the connection part 400 is smaller than the thickness of the projection screen 200 and smaller than the thickness of the support bars 30, ensuring that when the projection screen 200, the connection part 400 and the support bars 30 are in a high temperature environment, even if the connection part 400 expands due to heat, the impact on the projection screen 200 is small, thereby ensuring the flatness of the projection screen 200.
  • the connecting portion 400 in the projection screen 000 may include: a whole layer of connecting sheet 401 , and the orthographic projections of at least some of the plurality of supporting strips 30 on the back of the projection screen 200 may all be located within the orthographic projection of the connecting sheet 401 on the back of the projection screen 200 .
  • connection portion 400 may include: a plurality of connection bars 402, and the plurality of connection bars 402 may correspond one-to-one to at least some of the plurality of support bars 30.
  • the orthographic projection of each connection bar 402 on the back of the projection screen 200 may be located within the orthographic projection of the corresponding support bar 30 on the back of the projection screen 200.
  • the connection portion 400 may include: a connection sheet 401 arranged in a whole layer, and the orthographic projections of the plurality of support bars 30 located on the back of the projection screen 200 on the back of the projection screen 200 may all be located within the orthographic projection of the connection sheet 401 on the back of the projection screen 200.
  • the plurality of support bars 30 are fixed to the back of the projection screen 200 by the connection sheet 401 arranged in a whole layer, so that the contact area between the support bars 30 and the projection screen 200 is large, and the structural strength and bending rigidity of the entire area of the projection screen 200 are effectively increased.
  • connection sheet 401 arranged in a whole layer is directly connected to the back of the projection screen 200, and then the plurality of support bars 30 are fixed to the side of the connection sheet 401 arranged in a whole layer away from the projection screen 200.
  • the assembly process of the support bars 30 and the projection screen 200 is relatively simple, and the assembly accuracy of the plurality of support bars 30 and the projection screen 200 can be ensured.
  • the orthographic projection of the entire layer of the connecting sheet 401 on the back of the projection screen 200 is located in the area where the back of the projection screen 200 is located.
  • FIG. 9 is a side view of another projection screen provided in an embodiment of the present application.
  • the connecting portion 400 may include: a plurality of connecting bars 402, which may correspond one-to-one to a plurality of supporting bars 30 located on the back of the projection screen 200.
  • the positive projection of each connecting bar 402 on the back of the projection screen 200 may be located within the positive projection of the corresponding supporting bar 30 on the back of the projection screen 200.
  • FIG. 10 is a side view of a projection screen provided by another embodiment of the present application.
  • the connecting portion 400 includes: a whole layer of connecting pieces 401 and a plurality of connecting strips 402 .
  • the orthographic projection of a portion of the plurality of supporting strips 30 located on the back side of the projection screen 200 on the back side of the projection screen 200 can be located within the orthographic projection of the connecting piece 401 on the back side of the projection screen 200 .
  • the plurality of connecting strips 402 correspond one-to-one to another portion of the plurality of supporting strips 30 , and the orthographic projection of each connecting strip 402 on the back side of the projection screen 200 can be located within the orthographic projection of the corresponding supporting strip 30 on the back side of the projection screen 200 .
  • the back of the projection screen 200 includes: a first area A3 and a second area A4 adjacently arranged along the curling direction of the projection screen 200 , and the entire layer of the connecting sheet 401 in the connecting portion 400 can be arranged on the projection screen 200 In the second area A4 on the back side, a plurality of connecting strips 402 are arranged in the first area A3 on the back side of the projection screen 200.
  • the first area A3 may be the area where the back side of the projection screen 200 wound on the reel assembly 100 is located, and the second area A4 may be the area where the back side of the projection screen 200 not wound on the reel assembly 100 is located.
  • the portion of the projection screen 200 corresponding to the plurality of connecting strips 402 can be rolled up on the reel assembly 100 more easily, and the portion of the projection screen 200 corresponding to the entire layer of connecting pieces 401 has a good overall structural strength and bending rigidity, which ensures that the flatness of the portion of the projection screen 200 is good.
  • the width of each connection bar 402 may be smaller than the width of the corresponding support bar 30.
  • the positive projection of each connection bar 402 on the back of the projection screen 200 may be located in the central area of the positive projection of the corresponding support bar 30 on the back of the projection screen 200.
  • the width of each connection bar 402 is smaller than the width of the corresponding support bar 30. In this way, while ensuring that the projection screen 200 is supported by the support bar 30, the contact area between each support bar 30 and the projection screen 200 is small, so that the projection screen 200 can be relatively easily wound on the reel assembly 100 when it is folded.
  • each connecting strip 402 on the back of the projection screen 200 by setting the positive projection of each connecting strip 402 on the back of the projection screen 200 to be located in the central area of the positive projection of the corresponding support strip 30 on the back of the projection screen 200, the distribution of the support force applied by the support strips 30 in the area connected to the plurality of support strips 30 at the back of the projection screen 200 is relatively uniform, thereby ensuring the overall flatness of the projection screen 200.
  • the plurality of support strips 30 and the plurality of connecting strips 402 arranged in the first area A3 on the back of the projection screen 200 the width of each connecting strip 402 may be smaller than the width of the corresponding support strip 30.
  • the first area A3 may be the area where the back of the projection screen 200 wound on the reel assembly 100 is located
  • the second area A4 may be the area where the back of the projection screen 200 not wound on the reel assembly 100 is located.
  • connection portion 400 is an adhesive layer with adhesiveness or a magnetic structure with magnetism.
  • the magnetic structure is a magnetic sheet 400a with magnetism.
  • the plurality of support bars 30 can be fixed to the back of the projection screen 200 by bonding with an adhesive layer, or fixed to the back of the projection screen 200 by magnetic connection with the magnetic sheet 400a.
  • the adhesive layer can be any one of double-sided adhesive, liquid glue or foam glue, and the present application embodiment does not specifically limit this.
  • the connecting part is a magnetic structure, as shown in FIG. 28, the connecting part 400 includes a first magnetic structure 4001 and a second magnetic structure 4002, the first magnetic structure 4001 is located on the rolling shutter assembly 300, and the second magnetic structure 4002 is located on the surface of the projection screen 200 facing the rolling shutter assembly 300, and the first magnetic structure 4001 and the second magnetic structure 4002 are adsorbed on each other.
  • the first magnetic structure 4001 may have a variety of structures and may also have a variety of setting positions.
  • the first magnetic structure 4001 may be a magnetic layer, which may be attached to the rolling curtain assembly 300, for example, it may be attached to the side of the rolling curtain assembly 300 away from the projection screen 200.
  • the first magnetic structure 4001 may be prevented from directly contacting the second magnetic structure 4002 on the projection screen 200, thereby reducing the possibility of the first magnetic structure 4001 damaging the projection screen 31 and improving the protection effect for the projection screen 200.
  • the rolling curtain assembly may be made of a material that does not affect the mutual adsorption between the first magnetic structure 4001 and the second magnetic structure 4002.
  • the first magnetic structure 4001 may also be attached to the surface of the rolling curtain assembly 300 facing the projection screen 200 , and this embodiment of the present application does not limit this.
  • the first magnetic structure 4001 may include a plurality of magnetic strips, and the plurality of magnetic strips may be distributed on the rolling blind assembly 300 and arranged in sequence in a direction away from the roller assembly 100 .
  • the first magnetic structure 4001 can also be integrated into the rolling shutter assembly 300, that is, the support bar 30 of the rolling shutter assembly 300 can be doped with magnetic material, or part of the structure of the support bar 30 is made of magnetic material.
  • the connecting portion 400 is a magnetic structure.
  • the magnetic structure includes a third magnetic structure 4003 .
  • the third magnetic structure 4003 is located on the surface of the projection screen 200 facing the rolling curtain assembly 300 .
  • the support bar 30 includes: a support bar body 3000, and first magnetic particles a11 distributed in at least one of the interior and the surface of the support bar body 3000, the first magnetic particles a11 including metal particles, and/or, the projection screen 200 includes a screen body 2000 and second magnetic particles a12 distributed on at least one of the interior and the surface of the curtain body 2000 , wherein the second magnetic particles a12 include metal particles.
  • the third magnetic structure 4003 can be a magnetic sheet with magnetism
  • the support bar 30 can include: a support bar body 3000, and metal particles (i.e., first magnetic particles a11) distributed in the support bar body 3000.
  • metal particles i.e., first magnetic particles a11
  • the support bar 30 can be adsorbed on the back of the projection screen 200 through the magnetic sheet.
  • the side of the magnetic sheet facing away from the support bar 30 can be bonded to the back of the projection screen 200, or the projection screen 200 can also be integrated with particles such as magnetic powder (not shown in the figure), and the magnetic sheet is adsorbed on the back of the projection screen 200.
  • the embodiment of the present application does not make specific restrictions on this.
  • the projection screen 200 in FIG. 11 does not contain the second magnetic particles a12.
  • the support bar 30 includes a support bar main structure 301 and two connecting structures 302
  • at least one of the support bar main structure 301 and the two connecting structures 302 is a flexible structure
  • at least one structure is a hard structure, which can be a structure made of magnetic material.
  • the support bar main structure 301 can be a hard structure with magnetism
  • the two connecting structures 302 can be flexible structures.
  • the roller shutter assembly 300 in order to prevent the multiple support bars 30 from being misplaced in a direction parallel to the projection screen 200, as shown in FIG. 26, also includes at least one limiting rope 3001, and the limiting rope 3001 passes through the multiple support bars 30 in sequence along the curling direction of the projection screen 200; the limiting rope 3001 is configured to prevent the multiple support bars 30 from being misplaced in a direction parallel to the projection screen 200.
  • the projection screen further includes at least one limiting rope 3001, the limiting rope 3001 includes a limiting rope 3001, and correspondingly connected limiting holes 3003 are respectively provided on a plurality of support bars 30, the limiting holes 3003 on the plurality of support bars 30 are arranged relatively, and the limiting rope 3001 passes through the limiting holes 3003 on the plurality of support bars 30.
  • the limiting rope 3001 cooperates with the limiting holes 3003 to limit the relative displacement and misalignment of the plurality of support bars 30 in the lateral direction, so that the plurality of support bars can always keep the alignment state during the use of the rolling curtain assembly, and such limiting rope 3001 will not increase the width of the edge of the rolling curtain assembly, and has little effect on the rolling curtain assembly.
  • the limiting rope 3001 can be a strip structure, a filament structure or a rope structure, which is not limited in the embodiment of the present application.
  • FIG27 is a schematic diagram of the left-side structural view of the support bar in the projection screen shown in FIG26 , please refer to FIG26 and FIG27 , wherein the connection structure 302 at one end of the support bar 30 includes a C-shaped opening c, and the connection structure 302 at the other end includes a columnar structure j.
  • the connection structure 302 at one end of the support bar 30 includes a C-shaped opening c
  • the connection structure 302 at the other end includes a columnar structure j.
  • multiple support bars 30 can be connected end to end to form a rolling curtain assembly 300.
  • connection structure 302 two adjacent support bars 30 are easily offset and misaligned in the horizontal direction (the direction perpendicular to the paper surface in FIG27 , and the horizontal direction in FIG26 is the horizontal direction), which may cause the rolling curtain assembly to be unable to effectively support the projection screen, thereby causing the flatness of the projection screen to be reduced, and the edge of the projection screen to curl.
  • a limiting structure such as a limiting screw or a limiting plate, to the edge of the support bar.
  • the limiting structure will increase the overall width of the rolling curtain and affect the appearance on the one hand, and will affect the smoothness of the rolling curtain when curling and unfolding on the other hand. It may also cause abnormal noise due to wear and tear, and there is also a risk of loosening.
  • the support bars 30 are limited, and the problem of misalignment of the support bars is avoided.
  • the structure is simple, stable and beautiful, and the width of the rolling curtain assembly is not increased, thereby improving the stability of the projection screen provided by the embodiment of the present application.
  • the rolling curtain assembly 300 that is movably connected between adjacent support bars 30, the arrangement of the limiting rope 3001 is extremely advantageous.
  • the limiting ropes 3001 may not be provided, thereby achieving the purpose of simplifying the structure of the projection screen.
  • the projection screen 000 may further include: a base 500 and a lifting mechanism 600.
  • the reel assembly 100 and the lifting mechanism 600 in the projection screen 000 may be fixed on the base 500, and the lifting mechanism 600 may include a crossbeam 601, which may be fixedly connected to the second end of the projection screen 200, and the lifting mechanism 600 may be configured to: control the part of the projection screen 200 wound on the reel assembly 100 to unfold through the crossbeam 601.
  • the first end of the projection screen 200 is also called the first side edge, and the second end is also called the second side edge, which can be two side edges of the projection screen 200 that are arranged opposite to each other along the curling direction of the projection screen 200.
  • the crossbeam 601 is fixedly connected to the second end of the projection screen 200 to support the second end of the projection screen 200.
  • the lift The structure 600 can control the movement of the crossbeam 601, and then drive the second side of the projection screen 200 to move through the crossbeam 601, so as to realize the unfolding of the projection screen 200.
  • the rolling curtain assembly 300 also includes at least one tensioning wire 3002, which passes through multiple support bars 30 in sequence along the curling direction of the projection screen 200; the tensioning wire 3002 is configured to allow the rolling curtain assembly 300 to be wound and to keep the support bars 30 in the rolling curtain assembly 300 in the unfolded state taut.
  • the tensioning wire 3002 includes, but is not limited to: carbon fiber, glass fiber, nylon fiber, and some high-toughness polymer wires, such as polyvinyl chloride, polypropylene, polypropylene, polystyrene, etc.
  • the diameter of the tension wire 3002 can be adaptively designed according to the size of the support bar 30.
  • the embodiment of the present application uses a millimeter-level tension wire 3002, for example, the diameter of the tension wire 3002 is 0.5mm-2mm.
  • the tension wire 3002 By using the tension wire 3002 to penetrate the plurality of support bars 30 to enhance their strength, when the rolling curtain assembly 300 is in a rolled state, the tension wire 3002 is correspondingly in a relaxed state and does not bear the rigidity role. At this time, the support bar 30 is partially in contact with the projection screen 200, thereby reducing the bending strain. When the rolling curtain assembly 300 is in an unfolded state, the tension wire 3002 is tightened, so that the plurality of support bars 30 remain taut, thereby increasing the strength of the projection screen 200.
  • the tension wires 3002 in the projection screen 000 are respectively fixedly connected to the plurality of support bars 30 in sequence, and the tension wires 3002 can be respectively connected to the base 500 and the crossbeam 601 after the lifting mechanism 600 unfolds the projection screen 200.
  • the tension wires 3002 can also be disconnected from at least one of the base 500 and the crossbeam 601 before the reel assembly 100 rolls up the projection screen 200.
  • the two ends of the tension wire 3002 fixedly connected to the plurality of support bars 30 can be fixedly connected to the crossbeam 601 and the base 500 respectively, and the tension wire 3002 is in a tensioned state.
  • the tension wire 3002 is used to tension the projection screen 200, and the overall flatness of the projection screen 200 is further ensured.
  • the tension wire 3002 is first disconnected from at least one of the base 500 and the crossbeam 601, so that the tension wire 3002 is in a relaxed state without affecting the curling of the projection screen 200.
  • a long hole (not shown in the figure) passing through each support bar 30 can be opened in the plurality of support bars 30, and the tension wire 3002 is connected to the plurality of support bars 30 after passing through the plurality of long holes. In this way, the back appearance of the projection screen 200 can be ensured to be better.
  • the tensioning wire 3002 also plays the role of the limiting rope 3001. It can be seen that in some examples, the tensioning wire 3002 can be arranged alone without the need to additionally arrange the limiting rope 3001, which can also achieve the purpose of limiting the mutual positioning of multiple support bars 30.
  • the tension wire 3002 can be set to one or more, for example, two, three, four or five are evenly arranged.
  • the length direction of the tension wire 3002 is perpendicular to the length direction of the multiple support bars 300.
  • the tension wire 3002 can be set in the middle position of the back of the projection screen 200.
  • the number of the tension wire 3002 can also be three, one tension wire 3002 is set at each of the two side edges of the back of the projection screen 200, and one tension wire 3002 is set at the middle position of the back of the projection screen 200.
  • At least part of the multiple support bars 30 in the projection screen 000 may be a solid structure, and/or at least part of the multiple support bars 30 may be a hollow structure.
  • the multiple support bars 30 may all be set as a hollow structure; or the multiple support bars 30 may all be set as a solid structure; or part of the multiple support bars 30 may be a hollow structure, and another part may be a solid structure, which is not specifically limited in the embodiment of the present application.
  • a reinforcing rib 303 may be provided in the cavity of the support bar 30 to reinforce the support bar 30.
  • the reinforcing rib 303 may be in the shape of a long strip, or a "crescent shape", or other shapes, which are not specifically limited in the embodiments of the present application.
  • the projection screen 200 needs to be unfolded and folded many times.
  • the present application uses a support strip 30 with a thermal expansion feature that is arranged on the back of the projection screen 200 and fixedly connected to the back of the projection screen 200, thereby effectively solving the above technical problems.
  • the projection screen 200 When the projection screen 200 is rolled up, in order to prevent the projection screen 200 from being locally deformed, it is necessary to ensure that the projection screen 200 is aligned with the projection screen 200.
  • the roll assembly 100 is well fitted, that is, the support strip 30 is required to have a smaller thickness h, a smaller width w, and a larger spacing d between two adjacent support strips 30. To this end, it is necessary to ensure that the maximum principal strain ⁇ principal of the projection screen 200 is smaller than the failure principal strain [ ⁇ ] of the projection screen 200.
  • the support bar 30 is required to have a larger thickness h, the support bar 00 has a larger width w, and the distance d between two adjacent support bars 30 is smaller. For this reason, it is necessary to ensure the maximum value max u 3 of the out-of-plane displacement deformation (the maximum displacement of the projection screen before and after deformation) of the projection screen 200 under the combined action of its own gravity and wind pressure, that is, to minimize the maximum value max u 3 of the out-of-plane displacement deformation.
  • the embodiment of the present application is to illustrate the influence of the width and thickness of the support bar and the distance between two adjacent support bars on the maximum out-of-plane displacement deformation of the projection screen.
  • Figure 15 is a schematic diagram of the projection screen when it is unfolded, in which the cross section of the support bar 30 is a rectangular shape.
  • the support bar 30 is a PET bar as an example for schematic description.
  • the width w of the PET strip, the thickness h of the PET strip, and the distance d between two adjacent PET strips are taken as design variables, the maximum out-of-plane displacement max u 3 of the projection screen 200 in the unfolded state is minimized as the objective function, and the maximum principal strain ⁇ principal of the projection screen in the rolled state is less than the allowable failure principal strain [ ⁇ ] of the projection screen 200 as the optimization constraint.
  • the roll assembly 100 can be set as a single roll or multiple rolls. As shown in FIG. 28, the roll assembly 100 includes a first roll 101, and one end of the projection screen 200 and one end of the rolling curtain assembly 300 are both connected to the first roll 101. It can be seen that the projection screen 200 and the rolling curtain assembly 300 can be rolled up and stored in the same first roll 101.
  • This structure has the advantages of simple structure and small volume.
  • the roller assembly 300 includes a second roller 102 and a third roller 103 (the axis of the second roller 102 can be parallel to the axis of the third roller 103), one end of the projection screen 200 is connected to the second roller 102, and one end of the rolling curtain assembly 300 is connected to the third roller 103.
  • the projection screen 200 and the rolling curtain assembly 300 can be rolled up and stored in two different rollers respectively. This structure can prevent the rolling curtain assembly 300 from damaging the projection screen 200 after the projection screen 200 is rolled up, thereby improving the protection of the projection screen 200.
  • the embodiment of the present application further provides a projection device, which includes any of the above-mentioned projection screens 000.
  • the projection device provided by the embodiment of the present application has all the advantages of the above-mentioned projection screens 000.
  • the projection device provided in the embodiment of the present application also includes a projection host 001.
  • the laser projection device includes: a projection screen 000 and a projection host 001.
  • the projection device provided in the embodiment of the present application may further include: a storage device 002, the storage device 002 is used to store the projection host 001 and the projection screen 000.
  • the storage device 002 may have a light-transmitting area 0021 and an opening 0022, the light beam emitted by the projection host 001 can pass through the light-transmitting area 0021, and the lifting mechanism 600 can control the projection screen 200 to pass through the opening 0022 and unfold.
  • the projection host 001 and the projection screen 000 are stored in the storage device 002, which is convenient for saving space.
  • the lifting mechanism 600 controls the projection screen 200 to unfold, and the projection host 001 projects a light beam onto the projection screen 200, so that the projection screen 200 displays the projection picture.
  • the flatness of the projection screen 200 can be improved, especially the flatness of the two edges of the projection screen 200 along its lateral direction, so as to improve the display effect of the image carried by the projection screen 200.
  • the projection screen 000 is stored in the storage device 002, and the soft and hard support strips 30 are used to support the projection screen 200.
  • the strip 30 has good bending performance and does not exert great pressure on the projection screen 200, thereby protecting the projection screen 200 from indentations, etc., increasing the service life of the projection screen 200 and reducing the use cost of the laser projection equipment.
  • the vertical distance from the center point of the light-transmitting area 0021 to the plane where the unfolded projection screen 200 is located is equal to the product of the projection ratio of the projection host and the width of the display area on the projection screen, and the width of the display area refers to the size of the display area in the horizontal direction. In this way, it can be ensured that the light beam emitted by the projection host 001 can be accurately projected to the display area of the projection screen 200, so as to ensure the clarity of the projection picture on the projection screen 200.
  • the projection ratio of the projection host 001 is related to the selected projection host 001, that is, if a different projection host 001 is selected, the projection ratio is different, and thus the vertical distance from the center point of the light-transmitting area 0021 to the plane where the unfolded projection screen 200 is located is also different.
  • the vertical distance from the center point of the light-transmitting area 0021 to the plane where the unfolded projection screen 200 is located is calculated by the projection ratio of the projection host 001 and the width of the display area, so as to ensure that the light beam emitted by the projection host 001 can be completely projected on the display area of the projection screen 200.
  • the projection host 001 may be an ultra-short-throw projection host, which can shorten the distance between the projector 40 and the projection screen 30, thereby facilitating the miniaturization of the projection device.
  • the ultra-short-throw projection host may be a DLP (Digital Light Procession) projection host. In this way, the distance between the projection host 001 and the plane where the projection screen 000 is located is set to a shorter distance, so as to achieve a miniaturized design of the entire projection device.
  • DLP Digital Light Procession
  • the projection host 001 may include: a light source, an optical machine and a lens (not shown in the figure), wherein the light source is used to emit a light beam to the optical machine.
  • the optical machine may include: a digital micromirror array (DMD) and a driving circuit board electrically connected to the DMD, and the driving circuit board in the optical machine is used to provide a driving signal to the DMD. Therefore, the DMD can modulate the light beam emitted by the light source based on the driving signal, and emit the modulated light beam to the lens, and then emit the light beam through the lens to the projection screen in the projection screen 000, so that the projection screen 200 can present a projection picture.
  • the lens included in the projection host 001 is an ultra-short-throw projection lens.

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Abstract

一种投影屏幕及投影设备，属于投影技术领域。投影屏幕包括：投影幕布、卷帘组件以及卷筒组件；卷帘组件位于投影幕布的背面，投影幕布的第一端和卷帘组件的第一端均与卷筒组件连接；卷帘组件包括多个支撑条，多个支撑条沿投影幕布的卷曲方向依次排布；卷帘组件中的至少部分支撑条具有热膨胀特征，投影幕布的热膨胀系数与具有热膨胀特征的支撑条的至少部分的热膨胀系数之间的比值小于或等于目标阈值，目标阈值大于或等于1。该投影屏幕有效降低了投影幕布发生边缘卷边或者内部不平整的不良现象的概率。

Description

投影屏幕及投影设备
本申请要求于2022年10月28日提交的申请号为202211339691.9、申请名称为“投影屏幕”的中国专利申请的优先权，以及，于2023年01月31日提交的申请号为202310094352.7、申请名称为“投影屏幕以及投影设备”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
本申请涉及投影技术领域，特别涉及投影屏幕及投影设备。
背景技术
激光投影系统主要包括：投影屏幕和投影设备，投影屏幕是一种用于承接投影仪投射出的影像画面的设备，投影设备用于向投影屏幕投射投影光束，以在投影屏幕上显示投影画面。
投影屏幕通常包括：投影幕布和卷曲机构，投影幕布的一侧与卷曲机构连接，通过卷曲机构的控制能够让展开状态下的投影幕布收起。
然而，投影幕布在多次展开和收起后，投影幕布极易发生边缘卷边或者内部不平整的不良现象，导致投影幕布上呈现的投影画面出现畸变等不良问题，使得投影幕布上的投影画面的显示效果较差。
公开内容
本申请一方面提供了一种投影屏幕，所述投影屏幕包括：投影幕布、卷帘组件以及卷筒组件；
所述卷帘组件位于所述投影幕布的背面，所述投影幕布的第一端和所述卷帘组件的第一端均与所述卷筒组件连接；
所述卷帘组件包括多个支撑条，所述多个支撑条沿所述投影幕布的卷曲方向依次排布；
所述卷帘组件中的至少部分支撑条具有热膨胀特征，所述投影幕布的热膨胀系数与具有所述热膨胀特征的支撑条的至少部分的热膨胀系数之间的比值小于或等于目标阈值，所述目标阈值大于或等于1。
本申请另一方面提供了一种投影设备，所述投影设备包括投影仪以及上述任一所述的投影屏幕。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅为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是相关技术中示出的投影幕布未受热膨胀时所呈现的直线形的光标图像的效果图；
图2是相关技术中示出的投影幕布受热膨胀时所呈现的直线形的光标图像的效果图；
图3是本申请实施例提供的第一示例性投影屏幕的后视图；
图4是图3示出的投影屏幕的侧视图；
图5是图3示出的投影幕布未受热膨胀时所呈现的直线型的光标图像的效果图；
图6是图3示出的投影幕布受热膨胀时所呈现的直线形的光标图像的效果图；
图7是本申请实施例提供的第二示例性投影屏幕的侧视图；
图8是本申请实施例提供的第三示例性投影屏幕的侧视图；
图9是本申请实施例提供的第四示例性投影屏幕的侧视图；
图10是本申请实施例提供的第五示例性投影屏幕的侧视图；
图11是本申请实施例提供的第六示例性投影屏幕的侧视图；
图12是本申请实施例提供的第七示例性投影屏幕的结构示意图；
图13是本申请实施例提供的一种拉紧绳与支撑条的连接示意图；
图14是本申请实施例提供的一种支撑条与投影幕布的连接示意图；
图15是本申请实施例提供的投影幕布展开状态下的尺寸标注图；
图16是本申请实施例提供的第八示例性投影屏幕的侧视图；
图17是本申请实施例提供的第九示例性投影屏幕的侧视图；
图18是本申请实施例提供的第九示例性投影屏幕的侧视图；
图19是图18所示的投影屏幕的部分区域的放大结构示意图；
图20是本申请实施例提供的投影屏幕中第一示例性柔性支撑条的结构示意图；
图21是本申请实施例提供的投影屏幕中第二示例性柔性支撑条的结构示意图；
图22是本申请实施例提供的第十示例性投影屏幕的侧视图；
图23是图22所示的投影屏幕的部分区域的放大结构示意图；
图24是本申请实施例提供的第十一示例性投影屏幕的侧视图；
图25是本申请实施例提供的第十二示例性投影屏幕的侧视图；
图26是本申请实施例提供的第十三示例性投影屏幕的结构示意图；
图27是图26所示的投影屏幕中支撑条的左视结构示意图；
图28是本申请实施例提供的第十四示例性投影屏幕的结构示意图；
图29是本申请实施例提供的第十五示例性投影屏幕的结构示意图；
图30是本申请实施例提供的一种激光投影设备的结构示意图；
图31是本申请实施例提供的另一种激光投影设备的结构示意图。
附图标记分别表示：
000、投影屏幕；
100、卷筒组件；101、第一卷筒；102、第二卷筒；103、第三卷筒；
200、投影幕布；2000、幕布本体；
300、卷帘组件；
30、支撑条；
30a、软硬结合支撑条；30b、硬质支撑条；
301、支撑条主体结构；302、连接结构；303、加强筋；
3000、支撑条本体；3001、限位绳；3002、拉紧线体；3003、限位孔；
a11、第一磁吸颗粒；a12、第二磁吸颗粒；
g、支撑条组；
400、连接部；401、连接片；402、连接条；400a、磁片；4001、第一磁性结构；4002、
第二磁性结构；4003、第三磁性结构；
500、基座；600、升降机构；601、横梁；
001、投影主机；
002、收纳装置；0021、透光区；0022、开口。
通过上述附图，已示出本申请明确的实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
具体实施方式
为使本申请的上述目的、特征和优点能够更为明显易懂，下面将结合附图和实施例对本申请做进一步说明。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本申请更全面和完整，并将示例实施方式的构 思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的结构，因而将省略对它们的重复描述。本申请中所描述的表达位置与方向的词，均是以附图为例进行的说明，但根据需要也可以做出改变，所做改变均包含在本申请保护范围内。本申请的附图仅用于示意相对位置关系不代表真实比例。
在相关技术中，参见图1和图2，为了避免投影屏幕中的投影幕布被升降机构和卷曲机构多次展开和收起后，投影幕布10极易发生边缘卷边或者内部不平整的不良现象，可以在投影幕布10的背面设置多个支撑条20。然而，支撑条20的热/湿膨胀系数远小于投影幕布10的热/湿膨胀系数，例如，当支撑条20为碳纤维片时，碳纤维片的热膨胀系数通常为0.57微应变/度，投影幕布10的热膨胀系数通常为60微应变/度。这样，在投影屏幕00处于温度较高的环境中时，投影屏幕00中的投影幕布10受热膨胀的程度远大于碳纤维片受热膨胀的程度。而当投影幕布10与碳纤维片连接后，投影幕布10受热膨胀后，对膨胀程度较小的多个碳纤维片施加压力，使碳纤维片屈曲变形，导致与碳纤维片连接的投影幕布10正面的平整度较差。投影幕布10正面上呈现的投影画面仍然会出现畸变等不良问题，进而导致投影幕布10上的投影画面的显示效果较差。然而为了降低在投影幕布10和碳纤维片在发生热膨胀时投影幕布的变形程度，通常将每两个相邻的碳纤维片之间的距离设置的较大。然而，这样又会导致只能够对投影幕布10的较小部分所在的区域的平整度进行改善，即限制了碳纤维片对投影幕布10整体强度的改善效果。
例如，请参考图1和图2，图1是相关技术中示出的投影幕布未受热膨胀时所呈现的直线形的光标图像的效果图，图2是相关技术中示出的投影幕布受热膨胀时所呈现的直线形的光标图像的效果图。在投影屏幕00未受热膨胀时，各个支撑条20均能够对投影幕布10进行有效的支撑，保证投影幕布10正面的平坦性较好，投影幕布10上呈现的光标图像30未发生明显的畸变。在投影屏幕00受热膨胀时，各个支撑条20均会在投影幕布10受热膨胀的带动下形成屈曲变形，导致投影幕布10正面的平坦性较差，投影幕布10上呈现的光标图像30会发生明显的畸变。
请参考图3和图4，图3是本申请实施例提供的一种投影屏幕的后视图，图4是本申请实施例提供的一种投影屏幕的侧视图，并且图3和图4均示例了卷帘组件300中的多个支撑条30均为具有热膨胀特征的支撑条30(支撑条30又可称为卷帘片)。投影屏幕000包括：卷筒组件100、投影幕布200和卷帘组件300，卷帘组件300位于投影幕布200的背面，投影幕布200的第一端和卷帘组件300的第一端均与卷筒组件100连接。
其中，卷帘组件300包括多个支撑条30，多个支撑条30沿投影幕布200的卷曲方向依次排布。卷帘组件300中的至少部分支撑条30具有热膨胀特征，具有热膨胀特征的支撑条30满足以下条件：投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的至少一部分的热膨胀系数之间的比值小于或等于目标阈值，其中目标阈值大于或等于1。
投影屏幕000中的投影幕布200中的至少部分能够卷曲缠绕在卷筒组件100上，且投影幕布200的正面可以用于显示投影画面。卷帘组件300位于投影幕布200的背面，卷帘组件300中的多个支撑条30可以均与投影幕布200的背面固定连接。
本申请实施例中，卷帘组件300中的至少部分支撑条30具有热膨胀特征，具有热膨胀特征的支撑条30的至少一部分采用具有热膨胀特征的材料制备得到，例如，具有热膨胀特征的支撑条30包括第一部分和第二部分，第一部分和第二部分中的一个采用具有热膨胀特征的材料制备得到，或者，具有热膨胀特征的支撑条30的整体采用具有热膨胀特征的材料制备得到。
一种示例是，投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的一部分的热膨胀系数之间的比值小于或者等于目标阈值。
另一种示例是，投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30整体的热膨胀系数之间的比值小于或者等于目标阈值。
本申请实施例中，使目标阈值大于或等于1，也就是说，投影幕布200的热膨胀系数大于或等于具有热膨胀特征的支撑条30的至少一部分的热膨胀系数，这样，以保证具有热膨胀 特征的支撑条30即使受热膨胀，其热膨胀程度始终小于或等于投影幕布200的热膨胀程度，使得具有热膨胀特征的支撑条30对投影幕布200始终稳定支撑。
示例性地，当投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的热膨胀系数之间的比值小于或者等于目标阈值时，该目标阈值的取值可以为3。
示例性地，投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的热膨胀系数之间的比值包括但不限于3、2.5、2、1.5、1.4、1.3、1.2、1.1、1等。
需要说明的是，在实际的应用中，根据投影幕布200的尺寸以及用于卷曲投影幕布200的卷筒组件100的直径的不同，可以选用不同的目标阈值，本申请实施例对此不做具体的限定。
在本申请实施例中，与投影幕布200的背面固定连接的多个具有热膨胀特征的支撑条30沿投影幕布200的卷曲方向排布，且投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的至少一部分的热膨胀系数之间的比值小于或者等于目标阈值，使得投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的热膨胀系数相接近。这样，当投影屏幕000处于温度较高的环境中时，投影幕布200受热膨胀的程度与具有热膨胀特征的支撑条30受热膨胀的程度相接近。从而，投影幕布200受热膨胀后，对具有热膨胀特征的支撑条30施加的压力较小，使具有热膨胀特征的支撑条30产生屈曲变形的程度较小，进而使得具有热膨胀特征的多个支撑条30可以对投影幕布200进行有效地支撑，这样，投影幕布200在多次展开和收起后，有效降低投影幕布200发生边缘卷边或者内部不平整的不良现象的概率。
在一些实现方式中，投影幕布200的结构强度和抗弯刚度分别小于具有热膨胀特征的支撑条30的至少一部分的结构强度和抗弯刚度，例如，具有热膨胀特征的支撑条30部分区域的结构强度和抗弯刚度大于投影幕布200的结构强度和抗弯刚度，或者，具有热膨胀特征的支撑条30整体区域的结构强度和抗弯刚度大于投影幕布200的结构强度和抗弯刚度。
一种实施方案是，在垂直于投影幕布200的背面的方向上，具有热膨胀特征的支撑条30的厚度可以大于投影幕布200的厚度。其中，此处所示的“厚度”指的是沿垂直于投影幕布200的背面的方向。例如，对于支撑条30为矩形条状结构时，采用上述方式能够容易地实现具有热膨胀特征的支撑条30的结构强度和抗弯刚度大于投影幕布200的结构强度和抗弯刚度，以保证支撑条30可以对投影幕布200起到有效的支撑作用，进而可以保证投影幕布200正面的平整度较好，有效的降低了投影幕布200正面上呈现的投影画面出现畸变等不良问题的概率。
示例性地，请参考图5和图6，图5是图3示出的投影幕布200未受热膨胀时所呈现的直线型的光标图像的效果图，图6是图3示出的投影幕布200受热膨胀时所呈现的直线形的光标图像的效果图。
如附图5所示，在投影幕布200未受热膨胀时，各个具有热膨胀特征的支撑条30均能够对投影幕布200进行有效的支撑，保证投影幕布200正面的平坦性较好。在投影幕布200上投射出长条状的光标图像A1，光标图像A1沿着投影幕布200的卷曲方向延伸，长条的光标图像A1未发生明显的畸变。
如附图6所示，在投影幕布200和具有热膨胀特征的支撑条30受热/湿膨胀时，投影幕布200的屈曲变形程度和具有热膨胀特征的支撑条30的屈曲变形程度相接近，以保证具有热膨胀特征的支撑条30可以对投影幕布200起到有效的支撑的作用，进而可以保证投影幕布200正面的平整度较好。在投影幕布200上投射出长条的光标图像A2，长条的光标图像A2同样未发生明显的畸变。
由于投影幕布200的热膨胀系数与具有热膨胀特征的支撑条30的热膨胀系数的取值相接近。因此，可以将多个具有热膨胀特征的支撑条30中每两个相邻的具有热膨胀特征的支撑条30之间的间距设置为，满足使投影幕布200上与多个具有热膨胀特征的支撑条301所对应的区域保持平整，例如，使相邻的两个具有热膨胀特征的支撑条30之间的间距与具有热膨胀特征的支撑条301的宽度的比值为1：(0.5-2)，从而使得该间距较小，如此，能够对投影幕布 200中相应区域的平整度进行有效地改善。
在本申请实施例中，在满足投影幕布200和具有热膨胀特征的支撑条30之间的热膨胀系数关系的前提下，投影幕布200和具有热膨胀特征的支撑条30的材质可以相同，也可以不同。
举例来说，投影幕布200和具有热膨胀特征的支撑条30的材质相同，这包括：投影幕布200的材质和具有热膨胀特征的支撑条30的至少部分的材质均为聚对苯二甲酸乙二醇酯(Polyethylene Terephthalate，PET)。
例如，可以使具有热膨胀特征的支撑条30的全部区域采用PET材料制备得到，或者，也可以使具有热膨胀特征的支撑条30的至少部分区域采用PET材料制备得到，例如下述的，使支撑条30的支撑条主体结构301为硬质结构，其采用PET材料制备得到，从而使得支撑条主体结构301具有热膨胀特征。使支撑条30的连接结构302为柔性材料，其采用不同于PET材料的其他柔性材料制备得到。
在实际的应用中，可以根据投影幕布200的尺寸和投影幕布200的卷绕直径来设置具有热膨胀特征的支撑条30的厚度、宽度以及每两个相邻的具有热膨胀特征的支撑条30之间的间距。
在实际的应用中，投影幕布200中卷绕在卷筒组件100上的部分容易发生蠕变，而未卷绕在卷筒组件100上的部分发生蠕变的概率较低。所以，在投影幕布200的未卷绕在卷筒组件100上的对应区域也可以不设置具有热膨胀特征的支撑条30或者使相邻两个具有热膨胀特征的支撑条30之间的间距设计为较大。这样，能够减小具有热膨胀特征的支撑条30的使用数量，进而降低了投影屏幕000的整体重量。
在其他可能的实现方式中，投影幕布200和具有热膨胀特征的支撑条30也可以采用不同于聚对苯二甲酸乙二醇酯的其他的材料制成，保证投影幕布200的热膨胀系数和支撑条30的热膨胀系数相近即可，本申请实施例对此不做具体的限定。
图7是本申请实施例提供的另一种投影屏幕的侧视图。如附图7所示，投影屏幕000中的投影幕布200和具有热膨胀特征的支撑条30为一体成型结构，即两者是一体形成的结构。例如，投影幕布200和具有热膨胀特征的支撑条30可以通过一次注塑工艺同时形成。这样，能够有效的简化投影屏幕000中的投影幕布200与具有热膨胀特征的支撑条30之间的连接工艺，且能够有效的保证投影幕布200与多个支撑条30之间的连接精度。
在一些实现方式中，本申请实施例提供的卷帘组件300中的至少部分支撑条30具有柔性特征，具有柔性特征的支撑条30的至少一部分为柔性结构。
可以理解地，柔性特征使得支撑条30的至少一部分为柔性结构，也就是说，具有柔性特征的支撑条30中的部分区域为柔性结构，或者，全部区域为柔性结构。
一种示例是，参见图20、图21或者图23，具有柔性结构的支撑条30为软硬结合支撑条30a，软硬结合支撑条30a中的部分区域为柔性结构。
另一种示例是，参见图23，卷帘组件300至少部分支撑条30为硬质支撑条30b，硬质支撑条30b中的全部区域均为刚性结构。
通过在卷帘组件300中布置具有柔性特征的支撑条30，投影幕布200卷曲时，具有柔性特征的支撑条30能够降低其对于投影幕布200的磨损和挤压力，解决了相关技术中投影屏幕容易损坏的问题，提升了对于投影幕布200的保护效果。
另外，由于具有柔性特征的支撑条30降低了其对于投影幕布200的挤压力，能够避免在投影幕布200上出现压痕，提升投影幕布200的显示效果。
另外，具有柔性特征的支撑条30的设置，还可以提升该卷帘组件300的卷曲能力，降低了投影屏幕的卷曲半径，可以缩小卷筒组件100的体积，利于投影屏幕的小型化。
基于卷帘组件300中具有热膨胀特征的支撑条30和具有柔性特征的支撑条30的布置，卷帘组件300可以存在多种实施方式，如下所示：
在一些示例(1)中，卷帘组件300中的所有支撑条30均具有热膨胀特征。
这些支撑条30可以具有柔性特征，也可以不具有柔性特征，一种示例是，卷帘组件300 中的所有支撑条30均具有热膨胀特征且不具有柔性特征，以图3所示的投影屏幕为例，其示例了卷帘组件300中的全部支撑条30为具有热膨胀特征的支撑条30，这些支撑条30不具有柔性特征，使其为硬质支撑条。
示例(1)中，多个具有热膨胀特征的支撑条30彼此间隔布置，任意相邻的两个支撑条30之间的间距可以参见上述所示，在此不再赘述。另外，该具有热膨胀特征的支撑条30可以为矩形长条状结构，使其容易成型制备，且利于控制各方向的尺寸。
在一些实现方式中，卷帘组件300包括第一部分支撑条和第二部分支撑条，第一部分支撑条至少具有热膨胀特征，第二部分支撑条具有柔性特征且不具有热膨胀特征。该种实现方式进一步地可以包括以下示例：
在一些示例(2)中，第一部分支撑条具有热膨胀特征且不具有柔性特征，第二部分支撑条具有柔性特征且不具有热膨胀特征。
示例(2)所示的卷帘组件300包括两类支撑条30，第一类支撑条为具有热膨胀特征且不具有柔性特征的支撑条30，第二类支撑条为具有柔性特征不具有热膨胀特征的支撑条30。
根据投影幕布200各区域对热膨胀导致的屈曲变形要求以及对压痕等耐磨要求，来确定不同类型的支撑条在其上的布置位置。
示例(2)中，第一类支撑条和第二类支撑条可以是分区域各自独立地布置，也可以是第一支撑条中掺杂有第二类支撑条中的部分或者全部。例如，可以是，一个第一类支撑条与一个第二类支撑条依次交替地布置。或者，还可以是，两个或两个以上的第一类支撑条依次间隔布置并构成第一支撑条组，第一支撑条组与一个第二类支撑条或者至少两个第二类支撑条依次交替地布置。或者，还可以是，两个或两个以上的第二类支撑条依次间隔布置并构成第二支撑条组，第二支撑条组与一个第一类支撑条依次交替地布置。
在一些示例(3)中，第一部分支撑条具有热膨胀特征且其中还存在部分支撑条30具有柔性特征，第二部分支撑条具有柔性特征且不具有热膨胀特征。
示例(3)所示的卷帘组件300包括三类支撑条30，第一类支撑条是具有热膨胀特征且不具有柔性特征的支撑条30，第二类支撑条为具有柔性特征且不具有热膨胀特征的支撑条30，第三类支撑条是同时具有热膨胀特征和柔性特征的支撑条30。
根据投影幕布200各区域对热膨胀导致的屈曲变形要求以及对压痕等耐磨要求，来确定不同类型的支撑条在其上的布置位置。
示例(3)中，第一类支撑条、第二类支撑条和第三类支撑条可以是分区域各自独立地布置，也可以是第一类支撑条、第二类支撑条和第三类支撑条中任意两者或者三者相互掺杂布置。例如，这包括，一个第一类支撑条、一个第二类支撑条、一个第三类支撑条可以按照任意排布顺序依次交替地布置。一个或多个第一类支撑条依次布置并构成第一支撑条组，一个或多个第二类支撑条依次布置并构成第二支撑条组，一个或多个第三类支撑条依次布置并构成第三支撑条组，第一支撑条组、第二支撑条组和第三支撑条组中任意两者或者三者相互掺杂布置。
在一些示例(4)中，第一部分支撑条具有热膨胀特征且其中所有支撑条30还具有柔性特征，第二部分支撑条具有柔性特征且不具有热膨胀特征。
示例(4)所示的卷帘组件300包括两类支撑条30，第一类支撑条是同时具有热膨胀特征和柔性特征的支撑条30，第二类支撑条为具有柔性特征且不具有热膨胀特征的支撑条30。
根据投影幕布200各区域对热膨胀导致的屈曲变形要求以及对压痕等耐磨要求，来确定不同类型的支撑条在其上的布置位置。
示例(4)中，第一类支撑条和第二类支撑条可以是分区域各自独立地布置，也可以是第一支撑条中掺杂有第二类支撑条中的部分或者全部。例如，可以是，一个第一类支撑条与一个第二类支撑条依次交替地布置。或者，还可以是，两个或两个以上的第一类支撑条依次间隔布置并构成第一支撑条组，第一支撑条组与一个第二类支撑条或者至少两个第二类支撑条依次交替地布置。或者，还可以是，两个或两个以上的第二类支撑条依次间隔布置并构成第 二支撑条组，第二支撑条组与一个第一类支撑条依次交替地布置。
在一些实现方式中，卷帘组件300中的所有支撑条30均具有热膨胀特征，并且，卷帘组件300中的至少部分支撑条30还具有柔性特征。该种实现方式进一步地可以包括以下示例：
在一些示例(5)中，卷帘组件300中的所有支撑条30均具有热膨胀特征，并且，卷帘组件300中的部分支撑条30还具有柔性特征。
示例(5)所示的卷帘组件300包括两类支撑条30，第一类支撑条是同时具有热膨胀特征和柔性特征的支撑条30，第二类支撑条为具有热膨胀特征且不具有柔性特征的支撑条30。
根据投影幕布200各区域对热膨胀导致的屈曲变形要求以及对压痕等耐磨要求，来确定不同类型的支撑条在其上的布置位置。
示例(5)中，第一类支撑条和第二类支撑条可以是分区域各自独立地布置，也可以是第一支撑条中掺杂有第二类支撑条中的部分或者全部。例如，可以是，一个第一类支撑条与一个第二类支撑条依次交替地布置。或者，还可以是，两个或两个以上的第一类支撑条依次间隔布置并构成第一支撑条组，第一支撑条组与一个第二类支撑条或者至少两个第二类支撑条依次交替地布置。或者，还可以是，两个或两个以上的第二类支撑条依次间隔布置并构成第二支撑条组，第二支撑条组与一个第一类支撑条依次交替地布置。
在一些示例(6)中，卷帘组件300中的所有支撑条30均具有热膨胀特征，并且，卷帘组件300中的所有支撑条30同时还具有柔性特征。
示例(6)所示的卷帘组件300包括一类支撑条30，该类支撑条是同时具有热膨胀特征和柔性特征的支撑条30。
示例(6)中，多个具有热膨胀特征和柔性特征的支撑条30彼此间隔布置，任意相邻的两个支撑条30之间的间距可以参见上述所示，在此不再赘述。或者，多个具有热膨胀特征和柔性特征的支撑条30彼此首尾固定连接布置。
本申请实施例中，具有柔性特征的支撑条30中涉及的柔性结构，可以通过柔性材料而获得，也可以通过使用弹性结构而获得，还可以使用柔性材料与弹性结构的组合而获得。
柔性材料指的是，材料本身具有弹性，例如，一些橡胶类材料等，这样，通过使用柔性材料制备柔性结构即可赋予其柔性特征。弹性结构指的是，该结构设计使得其沿投影幕布200的卷曲方向可弹性变形，比如，薄壁的臂、片、空心环、空心弧等结构，这样，通过使用目标材料制备柔性结构并将其设计为弹性结构，即可赋予柔性结构以柔性特征。该目标材料可以是硬质材料，也可以是柔性材料。
以目标材料为用具有热膨胀特征的材料举例来说，弹性结构可以采用该类具有热膨胀特征的材料制备得到，使得柔性结构的热膨胀系数与投影幕布200的热膨胀系数之间的比值大于或等于目标阈值。其中，此处涉及的“目标阈值”与前述涉及的一致，在此不再赘述。可见，这种方案适用于同时具有柔性特征和热膨胀特征的支撑条30。
具有柔性特征的支撑条30与相邻的支撑条30之间可以是间隔布置，也可以是首尾连接。具有柔性特征的支撑条30可以是整体为柔性结构，也可以是部分为柔性结构。其中，此处涉及的“相邻的支撑条30”可以是具有柔性特征且不具有热膨胀特征的支撑条30、具有热膨胀特征且不具有柔性特征的支撑条30、或者同时具有柔性特征和热膨胀特征的支撑条30。
一种示例是，具有柔性特征的支撑条30与相邻的支撑条30之间间隔布置(参见图3-图15)，那么，该具有柔性特征的支撑条30可以是采用柔性材料制备得到。或者，也可以将该具有柔性特征的支撑条30设计为薄片状或者环状。
另一种示例是，具有柔性特征的支撑条30与相邻的支撑条30首尾活动连接(参见图17-图29)，那么，该具有柔性特征的支撑条30可以包括连接结构302以用于与相邻的支撑条30进行连接。
另一种示例是，卷帘组件300中，即存在具有柔性特征的支撑条30与相邻的支撑条30之间间隔布置的方案，还存在具有柔性特征的支撑条30与相邻的支撑条30首尾活动连接的方案(参见图16)。
在一些实现方式中，如附图19所示，具有柔性特征的支撑条30为软硬结合支撑条30a，其包括：支撑条主体结构301以及分别位于支撑条主体结构301两端的两个连接结构302，支撑条主体结构301以及两个连接结构302中的至少一个结构为柔性结构，且一个结构为硬质结构；硬质结构通过硬质材料和/或刚性结构而获得。
具有柔性特征的支撑条通过连接结构302与相邻的支撑条相连接。此处涉及的“相邻的支撑条30”可以是具有柔性特征且不具有热膨胀特征的支撑条30、具有热膨胀特征且不具有柔性特征的支撑条30、或者同时具有柔性特征和热膨胀特征的支撑条30。
硬质材料指的是，材料本身具有刚性，不容易发生变形的材料。刚性结构指的是，该结构设计使得其沿投影幕布200的卷曲方向不可弹性变形，比如，厚壁的结构。
以目标材料为用具有热膨胀特征的材料举例来说，刚性结构可以采用该类具有热膨胀特征的材料制备得到，使得刚性结构的热膨胀系数与投影幕布200的热膨胀系数之间的比值大于或等于目标阈值。其中，此处涉及的“目标阈值”与前述涉及的一致，在此不再赘述。可见，这种方案适用于同时具有柔性特征和热膨胀特征的支撑条30。
在一些示例中，本申请实施例提供的投影屏幕中所包括的卷帘组件，是一种软硬结合的卷帘组件，也即是该卷帘组件包括硬质的结构，还包括柔性的结构，此种软硬结合的卷帘组件可以在保证对于投影幕布的支撑作用的情况下，一方面降低该卷帘组件对于投影幕布的损伤，另一方面提升该卷帘组件的弯曲性能，以便于投影屏幕的小型化。该软硬结合的卷帘组件可以具有多种结构，下面分别进行说明。
一种方案中，卷帘组件中的支撑条的部分结构可以为柔性结构，另一部分结构可以为硬质结构，请参考图18，图18是本申请实施例提供的一种投影屏幕的结构示意图，图19是图18所示的投影屏幕的部分区域的放大结构示意图(图18中的区域q1放大结构示意图)。
图18和图19所示的卷帘组件300中的支撑条30不仅具有柔性特征，还可以使部分支撑条30中的至少部分区域具有热膨胀特征。如上述涉及的示例(6)所示，所有的支撑条30均兼具热膨胀特征和柔性特征，这可以采用具有热膨胀特征的材料来制备得到具有柔性特征的支撑条30的整体或者部分区域，并且，具有柔性特征的支撑条30的结构如下所示。
请参考图18和图19，其中，具有柔性特征的支撑条30包括：支撑条主体结构301以及分别位于支撑条主体结构301两端的两个连接结构302，支撑条主体结构301以及两个连接结构302中的至少一个结构为柔性结构，且一个结构为硬质结构；硬质结构通过硬质材料和/或刚性结构而获得。
此种方案中，具有柔性特征的支撑条30可以为一种软硬结合的支撑条，如此便可以在提升该具有柔性特征的支撑条30的柔性的基础上，保证该具有柔性特征的支撑条30对投影幕布200的支撑作用，以使得投影幕布200可以保持较高的平整度，尤其是投影屏幕边缘区域的平整度。
在一种示例性的实施例中，上述柔性材料包括硅胶、热塑性弹性体(Thermoplastic Elastomer，TPE)、热塑性聚氨酯橡胶(Thermoplastic polyurethanes，TPU)、聚氯乙烯(Polyvinyl chloride，PVC)改性软胶以及聚氯乙烯改性橡胶中的至少一种。
硬质材料包括聚对苯二甲酸乙二醇酯、丙烯腈-丁二烯-苯乙烯共聚物，碳纤维、铝合金、聚碳酸酯(Polycarbonate，PC)以及聚氯乙烯中的至少一种。
当然，上述柔性材料和硬质材料还可以包括本领域的其他材料，本申请实施例对此不进行限制。
在一些示例中，具有柔性特征的支撑条30中的硬质结构的材质为具有热膨胀特征的材料，例如聚对苯二甲酸乙二醇酯等，或者，具有柔性特征的支撑条30的硬质结构和柔性结构的材质均为具有热膨胀特征的材料，例如聚对苯二甲酸乙二醇酯等。
以具有热膨胀特征的材料为聚对苯二甲酸乙二醇酯举例来说，对于具有柔性特征的支撑条30中的柔性结构，如若其材质为聚对苯二甲酸乙二醇酯，那么，可以将聚对苯二甲酸乙二醇酯材料设计为弹性结构，使其沿投影幕布200的卷曲方向可弹性变形，比如，薄壁的臂、 片、空心环、空心弧等结构等。这样，该具有柔性特征的支撑条30的柔性结构同时具有了热膨胀特征。
以具有热膨胀特征的材料为聚对苯二甲酸乙二醇酯举例来说，对于具有柔性特征的支撑条30中的硬质结构，可以将聚对苯二甲酸乙二醇酯材料设计厚壁结构，以维持其材料本身的刚性即可。这样，具有柔性特征的支撑条30的硬质结构同时具有了热膨胀特征。
一种具有柔性特征的支撑条30为软硬结合支撑条30a，其中，支撑条主体结构301为硬质结构，两个连接结构302中的一个连接结构302为硬质结构，另一个连接结构302为柔性结构。
示例性的，如图19所示的具有柔性特征的支撑条30中，两个连接结构302中，一个连接结构302为圆形结构(图19中具有柔性特征的支撑条30下端的连接结构302为圆形结构，该圆形结构具体可以为球头结构或圆柱结构)，另一个连接结构302为c型口结构(图19中具有柔性特征的支撑条30上端的连接结构302为圆弧形槽状结构)，其中的圆形结构可以为柔性结构，c型口结构以及支撑条主体结构301为硬质结构。此种结构使得具有柔性特征的支撑条30的一端具有柔性，可以在卷帘组件弯曲时随之弯曲，提升了卷帘组件的弯曲性能，降低了卷帘组件的弯曲半径，有利于投影屏幕的小型化。
另一种具有柔性特征的支撑条30为软硬结合支撑条30a，如图20所示，其中，支撑条主体结构301为硬质结构，软硬结合支撑条30a中的两个连接结构302为柔性结构。也即是该软硬结合支撑条30a中间的支撑条主体结构301为硬质结构，两端用于与其他支撑条连接的连接结构302为柔性结构。
上具有柔性特征的支撑条30的两端具有柔性，可以在卷帘组件300弯曲时随之弯曲，提升卷帘组件300的弯曲性能，降低卷帘组件300的弯曲半径，有利于投影屏幕的小型化(该小型化可以是指投影屏幕处于收纳状态下的小型化)，且可以降低收纳状态下卷帘组件300对于投影幕布200所施加的压力，降低了投影幕布200的损伤风险，提升了该投影屏幕000的使用寿命。
另外，由于柔性结构的摩擦力较大，这利于提升了具有柔性特征的支撑条30的连接结构302与所连接的相邻的支撑条30(相邻的支撑条30可以为具有柔性特征的支撑条30，也可以为硬质支撑条30)的连接结构302之间的摩擦力，降低了两个支撑条30在横向(该横向可以是指平行于卷筒组件的轴线的方向)上发生偏移的可能性。
再一种具有柔性特征的支撑条30为软硬结合支撑条30a，如图21所示，其中，支撑条主体结构301为柔性结构，具有柔性特征的支撑条30中的两个连接结构302为硬质结构。也即是该具有柔性特征的支撑条30两端的连接结构302为硬质结构，中间的支撑条主体结构301为柔性结构。中间的支撑条主体结构301可以在卷帘组件300弯曲时随之弯曲，提升卷帘组件300的弯曲性能，降低了卷帘组件300的弯曲半径，有利于投影屏幕的小型化，且可以降低收纳状态下卷帘组件300对于投影幕布200所施加的压力，降低投影幕布200的损伤风险，提升了该投影屏幕的使用寿命。
本申请实施例提供的投影屏幕的卷帘组件300包括多个具有柔性特征的支撑条30时，这多个具有柔性特征的支撑条30可以包括上述涉及的多种具有柔性特征的支撑条30中的至少一种，也即是卷帘组件300中的多个具有柔性特征的支撑条30的结构可以相同，或者，卷帘组件300中的多个具有柔性特征的支撑条30的结构可以不完全相同。
在一种示例性的实施例中，如附图17所示，卷帘组件300中的每个支撑条30可以均为上述的具有柔性特征的支撑条30，进而每个支撑条30均为软硬结合支撑条30a，可以提升卷帘组件300整体的弯曲性能，且可以降低每个支撑条30损伤投影幕布的可能性。
在另一种示例性的实施例中，如附图16所示，本申请实施例提供的卷帘组件300中，部分支撑条为软硬结合支撑条30a，剩余部分的支撑条30可以为硬质材料制成的硬质支撑条30b。图16还示出了相邻的软硬结合支撑条30a之间首尾活动式连接，以及，相邻的硬质支撑条30b以一定间距间隔布置。
在一些实现方式中，如图22和图23所示，其中，卷帘组件300中的多个支撑条30包括多个支撑条组g，支撑条组g包括相连接的至少两个支撑条30，且每个支撑条组g中包括至少一个具有柔性特征的支撑条30(例如，软硬结合支撑条30a)以及至少一个硬质支撑条30b。软硬结合支撑条30a和硬质支撑条30b的制备方式如上述所示。
卷帘组件300中的多个支撑条30中，部分支撑条为具有柔性特征的支撑条30(例如，软硬结合支撑条30a)，部分支撑条为硬质支撑条30b，且具有柔性特征的支撑条30分布于卷帘组件300中的多个位置处，如此便可以使得卷帘组件300的各个位置均可以具有柔性，提升了该卷帘组件300的整体柔性。
在一种示例性的实施例中，如图22和图23所示，支撑条组g包括相连接的两个支撑条30，且每个支撑条组g中包括一个软硬结合支撑条30a以及一个硬质支撑条30b。该实施例中，软硬结合支撑条30a以及硬质支撑条30b在卷帘组件300中依次交替排布，如此可以提升卷帘组件300中具有柔性特征的支撑条30的分布的均匀性，以使得卷帘组件300的各个区域的均具有一定的柔性，进一步避免了卷帘组件300损伤投影幕布的可能性，提升了卷帘组件300对于投影幕布的保护效果。
当然，每个支撑条组g中还可以包括更多数量的支撑条30，对应的，每个支撑条组g中的具有柔性特征的支撑条30以及硬质支撑条30b也可以为其他数量，示例性的，如图24所示，图24是本申请实施例提供的另一种投影屏幕的结构示意图，其中，每个支撑条组g中可以包括3个支撑条30，每个支撑条组g中包括两个软硬结合支撑条30a以及一个硬质支撑条30b。
如图25所示，每个支撑条组g中可以包括4个支撑条，每个支撑条组g中包括两个软硬结合支撑条30a以及两个硬质支撑条30b。
另外，虽然图22-图25示例了，每一支撑条组g内相邻的两个支撑条30之间，以及，相邻的两个支撑条组g之间，均依靠连接结构302活动连接，但是不排除地，相邻的两个支撑条30之间以及相邻的两个支撑条组g中的至少一个也可以是呈一定间距地间隔布置。
可见，本申请实施例提供了多种类型的卷帘组件300，例如，第一种类型的卷帘组件300中的每个支撑条均为具有柔性特征的支撑条30(例如，软硬结合支撑条30a)，第二种类型卷帘组件300可以包括多个硬质支撑条30b以及多个具有柔性特征的支撑条30(例如，软硬结合支撑条30a)，硬质支撑条30b和具有柔性特征的支撑条30交替排布或者间隔排布。
也就是说，本申请实施例还提供了一种投影屏幕000，该投影屏幕000中，卷帘组件300包括多个支撑条30，这多个支撑条30包括多个支撑条组g，支撑条组g包括连接的至少两个支撑条30，且每个支撑条组g中包括至少一个具有柔性特征的支撑条30(例如软硬结合支撑条30a)以及至少一个硬质支撑条30b。本申请实施例提供的该投影屏幕000种，具有柔性特征的支撑条30的结构可以参考以下示例。
一种具有柔性特征的支撑条30，其包括支撑条主体结构301和分别位于支撑条主体结构301两端的两个连接结构302，支撑条主体结构301以及两个连接结构302中的至少一个结构为柔性结构，例如为包括柔性材料的柔性结构，且至少一个结构为硬质结构，例如为包括硬质材料的硬质结构。此种方案中，具有柔性特征的支撑条30为一种软硬结合支撑条30a，如此便可以在提升该具有柔性特征的支撑条30的柔性的基础上，保证该具有柔性特征的支撑条30对投影屏幕的支撑作用，以使得投影屏幕可以保持较高的平整度，尤其是投影屏幕边缘区域的平整度。
另一种具有柔性特征的支撑条30，支撑条主体结构301为硬质结构，具有柔性特征的支撑条30中的两个连接结构302为柔性结构。由于柔性结构的摩擦力较大，进而该结构下，提升了该具有柔性特征的支撑条30的连接结构302与所连接的支撑条的连接结构302之间的摩擦力，降低了两个支撑条在横向上发生偏移的可能性。
再一种具有柔性特征的支撑条30，支撑条主体结构301为柔性结构，两个连接结构302为硬质结构。
上述就卷帘组件300中多个支撑条30的布置及其效果分别作了相关阐述，以下就卷帘组件300与投影幕布200之间的结合方式进行说明。
在一些实现方式中，请参考图8，图8是本申请实施例提供的又一种投影屏幕的侧视图。投影屏幕000还可以包括：用于使投影幕布200和卷帘组件300相连接的连接部400，连接部400分别与投影幕布200的背面和卷帘组件300中的多个支撑条30固定连接。在垂直于投影幕布200的背面的方向上，连接部400的厚度小于投影幕布200的厚度，且小于支撑条30的厚度。
在这种情况下，通过在投影幕布200与支撑条30之间设置连接部400用于将多个支撑条30固定在投影幕布200的背面。这样，即可使得投影幕布200与支撑条30单独制成后再通过连接工艺组装在一起，投影幕布200和支撑条30各自的组织状态和性能等不会发生改变。另外，使得连接部400的厚度小于投影幕布200的厚度，且小于支撑条30的厚度，保证投影幕布200、连接部400和支撑条30三者在处于温度较高的环境中时，即使连接部400发生受热膨胀，对投影幕布200产生的影响也较小，进而保证了投影幕布200的平整度。
如附图8所示，投影屏幕000中的连接部400可以包括：整层的连接片401，多个支撑条30中的至少部分支撑条30在投影幕布200的背面上的正投影，均可以位于连接片401在投影幕布200的背面上的正投影内。
和/或，如附图9所示，该连接部400可以包括：多个连接条402，该多个连接条402可以与多个支撑条30中的至少部分支撑条30一一对应。每个连接条402在投影幕布200的背面上的正投影，可以位于对应的支撑条30在投影幕布200的背面上的正投影内。
由上可知，对于分别与投影幕布200和多个支撑条30均连接的连接部400的结构形式有多种可选的实现方式，本申请实施例以以下三种可选的实现方式为例进行示意性的说明：
第一种可选的实现方式，如图8所示，该连接部400可以包括：整层设置的连接片401，位于投影幕布200背面的多个支撑条30在投影幕布200的背面上的正投影，均可以位于连接片401在投影幕布200的背面上的正投影内。在这种情况下，通过整层设置的连接片401将多个支撑条30固定在投影幕布200的背面，使得支撑条30与投影幕布200的接触面积较大，有效的增加了投影幕布200中整个区域的结构强度和抗弯刚度。进而在投影幕布200展开后，投影幕布200出现边缘卷边或内部不平整的不良现象的概率较低，保证了投影幕布200上的投影画面的显示效果较好。另外，采用整层设置的连接片401直接与投影幕布200的背面连接，再将多个支撑条30固定在整层设置的连接片401背离投影幕布200的一侧。这样，使得支撑条30与投影幕布200的组装过程较为简单，且能够保证多个支撑条30与投影幕布200的组装精度。需要说明的是，整层的连接片401在投影幕布200的背面上的正投影位于投影幕布200的背面所在的区域内。
第二种可选的实现方式，请参考图9，图9是本申请实施例提供的再一种投影屏幕的侧视图。连接部400可以包括：多个连接条402，该多个连接条402可以与位于投影幕布200背面中的多个支撑条30一一对应。每个连接条402在投影幕布200的背面上的正投影，可以位于对应的支撑条30在投影幕布200的背面上的正投影内。在这种情况下，通过设置多个连接条402与多个支撑条30一一对应连接，保证了每个支撑条30与投影幕布200的背面的组装灵活度，且减小了连接部400的整体重量，使得投影屏幕000的整体重量较小。
第三种可选的实现方式，请参考图10，图10是本申请另一实施例提供的一种投影屏幕的侧视图。连接部400包括：整层的连接片401和多个连接条402。其中，位于投影幕布200的背面一侧的多个支撑条30中的一部分支撑条30在投影幕布200的背面上的正投影可以位于连接片401在投影幕布200的背面上的正投影内。多个连接条402与多个支撑条30中的另一部分支撑条一一对应，每个连接条402在投影幕布200的背面上的正投影，可以位于对应的支撑条30在投影幕布200的背面上的正投影内。
示例性地，如图10所示，投影幕布200的背面包括：沿投影幕布200的卷曲方向相邻设置的第一区域A3和第二区域A4，连接部400中的整层的连接片401可以设置在投影幕布200 背面中的第二区域A4内，多个连接条402设置在投影幕布200背面中的第一区域A3内。在投影幕布200收起后，通常投影幕布200中的一部分是卷绕在卷筒组件100上，另一部分未卷绕在卷筒组件100上。该第一区域A3可以为卷绕在卷筒组件100上的投影幕布200的背面所在的区域，第二区域A4可以为未卷绕在卷筒组件100上的投影幕布200的背面所在的区域。如此，当投影幕布200需要收起时，与多个连接条402连接的投影幕布200对应的部分能够较为容易的卷曲在卷筒组件100上，而与整层的连接片401连接的投影幕布200对应的部分的整体的结构强度和抗弯刚度较好，保证了该部分投影幕布200的平整度较好。
在本申请实施例中，如图9所示，当连接部400包括多个连接条402时，每个连接条402的宽度可以小于对应的支撑条30的宽度。且每个连接条402在投影幕布200的背面上的正投影，可以位于对应的支撑条30在投影幕布200的背面上的正投影的中央区域内。在这种情况下，通过设置每个连接条402的宽度小于对应的支撑条30的宽度。如此，在保证通过支撑条30对投影幕布200支撑同时，每个支撑条30与投影幕布200的接触面积较小，使得投影幕布200在收起时能够较为容易的卷绕在卷筒组件100上。
另外，通过设置每个连接条402在投影幕布200的背面上的正投影，位于对应的支撑条30在投影幕布200的背面上的正投影的中央区域内，使得投影幕布200的背面处与多个支撑条30连接的区域受到的支撑条30施加的支撑力的分布较为均匀，进而保证了投影幕布200的整体平整度。示例性地，如图10所示，在投影幕布200背面的第一区域A3内设置的多个支撑条30和多个连接条402，每个连接条402的宽度可以小于对应的支撑条30的宽度。其中，该第一区域A3可以为卷绕在卷筒组件100上的投影幕布200的背面所在的区域，第二区域A4可以为未卷绕在卷筒组件100上的投影幕布200的背面所在的区域。
在一些实现方式中，连接部400为具有粘结性的粘接层或者具有磁性的磁性结构，例如，如附图11所示，该磁性结构为具有磁性的磁片400a。在这种情况下，多个支撑条30可以通过采用粘接层粘接的方式固定在投影幕布200的背面中，或者采用磁片400a磁性连接的方式固定在投影幕布200的背面中。示例性地，该粘接层可以为双面胶、液态胶水或者泡棉胶中的任意一种，本申请实施例对此不做具体的限定。
作为一种示例，连接部为磁性结构，如附图28所示，连接部400包括第一磁性结构4001以及第二磁性结构4002，第一磁性结构4001位于卷帘组件300上，第二磁性结构4002位于投影幕布200朝向卷帘组件300的表面上，第一磁性结构4001与第二磁性结构4002相互吸附。
其中，第一磁性结构4001可以具有多种结构，也可以具有多种设置位置，示例性的，一种投影屏幕中，第一磁性结构4001可以为磁性层，该磁性层可以贴附于卷帘组件300上，例如可以贴附在卷帘组件300远离投影幕布200的一面上，如此结构下，可以避免第一磁性结构4001直接与投影幕布200上的第二磁性结构4002接触，降低了第一磁性结构4001损伤投影屏幕31的可能性，提升了对于投影幕布200的保护效果。此种结构下，卷帘组件可以由不会对第一磁性结构4001和第二磁性结构4002相互吸附产生影响的材料制成。
当然，第一磁性结构4001也可以贴附于卷帘组件300朝向投影幕布200的一面上，本申请实施例对此不进行限制。
另外，第一磁性结构4001可以包括多个磁性条，这多个磁性条可以分布于卷帘组件300上，沿远离卷筒组件100的方向依次排布。
在一种示例性的实施例中，该第一磁性结构4001还可以结合至卷帘组件300中，也即是可以在卷帘组件300的支撑条30中掺杂磁性材料，或者，使支撑条30中的部分结构由磁性材料制成。
作为另一种示例，连接部400为磁性结构，如附图11所示，磁性结构包括第三磁性结构4003，例如，第三磁性结构4003位于投影幕布200朝向卷帘组件300的表面上。
支撑条30包括：支撑条本体3000，以及分布在支撑条本体3000内部和表面至少之一的第一磁吸颗粒a11，第一磁吸颗粒a11包括金属颗粒，和/或，投影幕布200包括幕布本体2000 和分布于幕布本体2000内部和表面至少之一的第二磁吸颗粒a12，第二磁吸颗粒a12包括金属颗粒。
在本申请实施例中，请参考图11，第三磁性结构4003可以为具有磁性的磁片，支撑条30可以包括：支撑条本体3000，以及分布在支撑条本体3000内的金属颗粒(即第一磁吸颗粒a11)。在这种情况下，通过在支撑条本体第一磁吸颗粒a11内集成金属颗粒，并采用具有磁性的磁片作为连接部400。这样，支撑条30能够通过磁片吸附在投影幕布200的背面。磁片背离支撑条30的一面可以粘接在投影幕布200的背面，或者投影幕布200中也可以集成磁粉(图中未示出)等颗粒，将磁片吸附在投影幕布200的背面，本申请实施例对此不做具体的限定。当然，图11中的投影幕布200内不含有第二磁吸颗粒a12也是可行的。
对于支撑条30包括支撑条主体结构301以及两个连接结构302的方案，支撑条主体结构301以及两个连接结构302中的至少一个结构为柔性结构，且至少一个结构为硬质结构，该硬质结构即可以为磁性材料构成的结构，例如支撑条主体结构301可以为具有磁性的硬质结构，两个连接结构302可以为柔性结构。
在一些实现方式中，为了防止多个支撑条30在平行于投影幕布200的方向上发生错位，如附图26所示，本申请实施例提供的卷帘组件300还包括至少一个限位绳3001，限位绳3001沿投影幕布200的卷曲方向依次贯穿多个支撑条30；限位绳3001被配置为，防止多个支撑条30在平行于投影幕布200的方向上发生错位。
在一种示例性的实施例中，如图26所示，该投影屏幕还包括至少一个限位绳3001，限位绳3001包括限位绳3001，以及多个支撑条30上分别设置有对应连通的限位孔3003，多个支撑条30上的限位孔3003相对设置，限位绳3001穿过多个支撑条30上的限位孔3003。该限位绳3001与限位孔3003配合，可以用于限制多个支撑条30在横向上发生相对位移、错位，可以使卷帘组件在使用的过程中，多个支撑条始终保持对齐的状态，且此种限位绳3001不会增加卷帘组件边缘的宽度，对卷帘组件的影响较小。其中，限位绳3001可以为条状结构、丝状结构或绳状结构，本申请实施例对此不进行限制。
图27是图26所示的投影屏幕中支撑条的左视结构示意图，请参考图26以及图27，其中，支撑条30的一端的连接结构302包括c型口c，另一端的连接结构302包括柱状结构j，通过此种结构，多个支撑条30便可以首尾相连，构成卷帘组件300，但是，此种连接结构302中，相邻的两个支撑条30容易在横向(图27中垂直于纸面的方向，图26中的横向为水平方向)发生偏移而错位，这可能导致卷帘组件无法对投影幕布实现有效的支撑，进而导致投影幕布的平整度降低，投影幕布的边缘发生卷边等问题，一种解决方式为在支撑条的边缘增加限位结构，如限位螺钉，或限位片等，但是限位结构一方面会增加卷帘整体的宽度，影响外观，另一方面会影响卷帘卷曲展开的顺滑程度，还可能因为磨损而异响，也有松脱的风险。
本申请实施例中，通过布置限位绳3001以及位于多个支撑条30上的限位孔3003，实现了对支撑条30的限位，避免了支撑条发生错位的问题，且结构简单、稳定以及美观，且不会增加卷帘组件的宽度，提升了本申请实施例提供的投影屏幕的稳定性。对于相邻支撑条30之间活动连接的卷帘组件300，限位绳3001的布置是极其有利的。
可以理解地，对于以一定的间距间隔布置的那些支撑条30，或者，支撑条30与投影幕布200一体成型的实施方案，也可以不设置限位绳3001，从而达到简化投影屏幕的结构的目的。
在一些实现方式中，如图12和图13所示，投影屏幕000还可以包括：基座500、升降机构600。投影屏幕000中的卷筒组件100和升降机构600均可以固定在基座500上，升降机构600可以包括横梁601，该横梁601可以与投影幕布200的第二端固定连接，升降机构600可以被配置为：通过横梁601控制投影幕布200中缠绕在卷筒组件100上的部分展开。
其中，投影幕布200的第一端又称为第一侧边，第二端又称为第二侧边，两者可以为投影幕布200中沿投影幕布200的卷曲方向上的相对设置的两个侧边。横梁601与投影幕布200的第二端固定连接，用于支撑投影幕布200的第二端。当投影幕布200需要展开时，升降机 构600能够控制横梁601移动，进而通过横梁601带动投影幕布200的第二侧边移动，以实现投影幕布200的展开。
在一些实现方式中，卷帘组件300还包括至少一个拉紧线体3002，拉紧线体3002沿投影幕布200的卷曲方向依次贯穿多个支撑条30；拉紧线体3002被配置为，允许卷帘组件300卷绕布置，且能够使得展开状态下的卷帘组件300中的支撑条30保持张紧。
示例性地，拉紧线体3002包括但不限于：碳纤维、玻璃纤维、尼龙纤维、以及一些韧性较强的高分子线体，例如聚氯乙烯、聚丙烯、聚丙烯、聚苯乙烯等。
拉紧线体3002的直径根据支撑条30的尺寸来进行适应性设计即可，示例性地，本申请实施例使用毫米级别的拉紧线体3002，例如，拉紧线体3002的直径为0.5mm-2mm。
通过使用拉紧线体3002贯穿多个支撑条30以增强其强度，当卷帘组件300处于卷曲状态时，拉紧线体3002相应地处于松弛状态而不承担刚度作用，此时，支撑条30与投影幕布200为局部接触，从而降低弯曲应变。当卷帘组件300处于展开状态时，拉紧线体3002拉紧，使得多个支撑条30保持张紧，从而增加投影幕布200的强度。
在一些示例中，投影屏幕000中的拉紧线体3002分别与多个支撑条30顺次固定连接，该拉紧线体3002能够在升降机构600将投影幕布200展开后分别与基座500和横梁601连接。该拉紧线体3002还能够在卷筒组件100将投影幕布200卷曲之前与基座500和横梁601中的至少一者解除连接。
在投影幕布200展开后，与多个支撑条30固定连接的拉紧线体3002的两个端部能够分别与横梁601和基座500固定连接，且使得拉紧线体3002处于张紧状态。以使得通过拉紧线体3002对投影幕布200起到张紧的作用，进一步保证了投影幕布200的整体平整度。当投影幕布200需要收起时，首先将拉紧线体3002与基座500和横梁601中的至少一者解除连接，以使拉紧线体3002处于松弛状态，而不影响投影幕布200的卷曲。示例性地，可以在多个支撑条30中开设贯穿每个支撑条30的长条孔(图中未示出)，将拉紧线体3002贯穿多个长条孔后与多个支撑条30连接。如此，能够保证投影幕布200的背面外观效果较好。
另外，拉紧线体3002还起到了限位绳3001的作用，可见，在一些示例中，可以单独布置拉紧线体3002，而无须再额外布置限位绳3001，同样能够起到对多个支撑条30进行相互限位的目的。
沿支撑条30的长度方向(即平行于投影幕布200的表面的方向)，拉紧线体3002可以设置为一个或者多个，例如设置为均匀布置的两个、三个、四个或者五个。拉紧线体3002的长度方向与多个支撑300条的长度方向垂直。示例性地，当拉紧线体3002的个数为一个时，可以将拉紧线体3002设置在投影幕布200的背面的中间位置。拉紧线体3002的个数也可以为三个，投影幕布200的背面的两个侧边处各设置一个拉紧线体3002，投影幕布200的背面的中间位置处设置一个拉紧线体3002。
在一些实现方式中，请参考图14，投影屏幕000中的多个支撑条30中的至少部分可以为实心结构，和/或，多个支撑条30中的至少部分可以为空心结构。示例性地，多个支撑条30可以均设置为空心结构；或者，多个支撑条30可以均设置为实心结构；或者多个支撑条30中的一部分可以为空心结构，另一部分可以为实心结构，本申请实施例对此不做具体的限定。
如图14所示，当支撑条30为空心结构时，可以在支撑条30的空腔内设置加强筋303，通过加强筋303对支撑条30进行补强。示例性地，该加强筋303的形状可以为长条状，或者“月牙状”，或者其他的形状，本申请实施例对此不做具体的限定。
在投影幕布200的使用过程中，投影幕布200需要多次的展开和收起，为了降低投影幕布200发生边缘卷边或者不平整的不良现象的概率，本申请中采用具有热膨胀特征的支撑条30布设在投影幕布200的背面，且与投影幕布200的背面固定连接，从而有效解决上述技术问题。
在投影幕布200卷曲时，为防止投影幕布200发生局部变形，需要保证投影幕布200与 卷筒组件100较好的贴合，即要求支撑条30具有较小的厚度h，支撑条30具有较小的宽度w以及相邻两个支撑条30之间的间距d较大。为此需要保证投影幕布200的最大主应变εprincipal小于投影幕布200的失效主应变[ε]。
在投影幕布200展开时，需要保证投影主机投射到投影幕布200上的画面具有良好的效果。即要求支撑条30具有较大的厚度h，支撑件条00具有较大的宽度w以及相邻两个的支撑条30之间的间距d较小。为此需要保证投影幕布200在自身重力和风压共同作用下的面外位移变形(变形前与变形后的投影幕布的最大位移)的最大值max u3，即要使得面外位移变形的最大值max u3要最小。
本申请实施例为了说明支撑条的宽度、厚度以及相邻两个支撑条之间的距离对投影幕布的面外位移变形的最大值的影响。请参考图15，图15是投影幕布展开时的示意图，其中示意了支撑条30的横截面为矩形形状。此处以支撑条30为PET条为例进行示意性说明。
以PET条的宽度w、PET条的厚度h以及相邻两个PET条之间的距离d为设计变量，展开状态下投影幕布200的最大面外位移max u3最小为目标函数，卷曲状态下投影幕布的最大主应变εprincipal小于投影幕布200的允许失效主应变[ε]为优化约束。优化问题列式可为：
find para＝[w，d，h]
min(max u3)
s.t.εprincipai＜[ε]
本申请实施例中，卷筒组件100可以设置为单卷筒，也可以设置为多卷筒，如附图28所示，卷筒组件100包括第一卷筒101，投影幕布200的一端以及卷帘组件300的一端均与第一卷筒101连接。可见，投影幕布200以及卷帘组件300可以均卷曲收纳至同一个第一卷筒101中，此种结构具有结构简单，体积小等优点。
对于投影幕布200和卷帘组件300可分离的投影屏幕，例如，连接部400为磁片的方案，如图29所示，卷筒组件300包括第二卷筒102和第三卷筒103(第二卷筒102的轴线可以与第三卷筒103的轴线平行)，投影幕布200的一端与第二卷筒102连接，卷帘组件300的一端与第三卷筒103连接。这样，投影幕布200以及卷帘组件300可以分别卷曲收纳至两个不同的卷筒中，此种结构可以避免在投影幕布200卷曲之后，卷帘组件300对投影幕布200产生损伤，提升对于投影幕布200的保护作用。
另一方面，本申请实施例还提供了一种投影设备，该投影设备包括上述任一所述的投影屏幕000。本申请实施例提供的投影设备具有上述涉及的投影屏幕000的所有优点。
本申请实施例提供的投影设备还包括投影主机001，如图30所示，该激光投影设备包括：投影屏幕000和投影主机001。
进一步结合图31所示，本申请实施例提供的投影设备还可以包括：收纳装置002，收纳装置002用于收纳投影主机001和投影屏幕000。收纳装置002可以具有透光区0021和开口0022，投影主机001出射的光束能够透过透光区0021，升降机构600能够控制投影幕布200穿过开口0022并展开。
这样，当不使用投影设备时，投影主机001和投影屏幕000收纳至收纳装置002中，便于节省空间。当投影设备处于使用状态时，升降机构600控制投影幕布200展开，同时投影主机001投射光束至投影幕布200上，以使投影幕布200显示投影画面。
当使用如上上述的软硬结合的支撑条30来支撑投影幕布200时，其能够提升投影幕布200的平整度，尤其是投影幕布200沿其横向方向的两个边缘的平整度，以提升该投影幕布200所承载的影像画面的显示效果。投影屏幕000收纳至收纳装置002中，软硬结合的支撑 条30具有良好的弯曲性能，且不会对投影幕布200施加大的压力，从而保护投影幕布200，防止其具有压痕等，提升投影屏幕000的使用寿命，降低了激光投影设备的使用成本。
其中，透光区0021的中心点到展开后的投影幕布200所在的平面的垂直距离等于投影主机的投射比与投影幕布上的显示区域的宽度之间的乘积，显示区域的宽度是指显示区域沿水平方向的尺寸。这样，能够保证投影主机001出射的光束能够精准地投射到投影幕布200的显示区域，以保证投影幕布200上投影画面的清晰性。
由于投射比是投影主机001本身的性能参数，因此投影主机001的投射比与选取的投影主机001有关，也即是选取不同的投影主机001，则投射比不同，进而透光区0021的中心点到展开后的投影幕布200所在的平面的垂直距离也不相同。这样，在实际设置过程中，通过投影主机001的投射比与显示区域的宽度计算出透光区0021的中心点到展开后的投影幕布200所在的平面的垂直距离，从而可以保证投影主机001出射的光束能够完整的投影在投影幕布200的显示区域。
示例性地，投影主机001可以为超短焦投影主机，如此可以缩短投影仪40与投影屏幕30之间的距离，便于实现投影设备的小型化。该超短焦投影主机可以为DLP(Digital Light Procession，数字光处理)投影主机。这样，投影主机001与投影屏幕000所在平面的距离设置成较短距离，以实现整个投影设备的小型化设计。
示例性地，投影主机001可以包括：光源、光机和镜头(图中未示出)，光源用于出射光束至光机。
光机可以包括：数字微镜阵列(Digital Micromirror Device，DMD)以及与DMD电连接的驱动电路板，光机中的驱动电路板用于向DMD提供驱动信号。从而DMD能够基于该驱动信号对光源出射的光束进行调制，并将调制后的光束出射至镜头，进而通过镜头出射光束至投影屏幕000中的投影幕布，使得投影幕布200能够呈现出投影画面。示例性地，投影主机001包括的镜头为超短焦投影镜头。
以上所述仅为本申请的较佳实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种投影屏幕，其中，所述投影屏幕包括：投影幕布、卷帘组件以及卷筒组件；
    所述卷帘组件位于所述投影幕布的背面，所述投影幕布的第一端和所述卷帘组件的第一端均与所述卷筒组件连接；
    所述卷帘组件包括多个支撑条，所述多个支撑条沿所述投影幕布的卷曲方向依次排布；
    所述卷帘组件中的至少部分支撑条具有热膨胀特征，所述投影幕布的热膨胀系数与具有所述热膨胀特征的支撑条的至少一部分的热膨胀系数之间的比值小于或等于目标阈值，所述目标阈值大于或等于1。
  2. 根据权利要求1所述的投影屏幕，其中，所述投影幕布和具有所述热膨胀特征的支撑条的材质相同，这包括：所述投影幕布的材质和具有所述热膨胀特征的支撑条的至少部分的材质均为聚对苯二甲酸乙二醇酯。
  3. 根据权利要求1所述的投影屏幕，其中，所述投影幕布和所述支撑条为一体成型结构。
  4. 根据权利要求1-3任一项所述的投影屏幕，其中，所述卷帘组件中的至少部分支撑条具有柔性特征，具有所述柔性特征的支撑条的至少一部分为柔性结构。
  5. 根据权利要求4所述的投影屏幕，其中，所述柔性结构通过柔性材料和/或弹性结构而获得。
  6. 根据权利要求4所述的投影屏幕，其中，具有所述柔性特征的支撑条包括：支撑条主体结构以及分别位于所述支撑条主体结构两端的两个连接结构，所述支撑条主体结构以及所述两个连接结构中的至少一个结构为柔性结构，且至少一个结构为硬质结构，所述硬质结构通过硬质材料和/或刚性结构而获得；
    具有所述柔性特征的支撑条通过所述连接结构与相邻的所述支撑条相连接。
  7. 根据权利要求4所述的投影屏幕，其中，所述多个支撑条包括多个支撑条组，所述支撑条组包括相连接的至少两个所述支撑条，且每个所述支撑条组包括至少一个具有所述柔性特征的支撑条以及至少一个硬质支撑条；
    具有所述柔性特征的支撑条中的柔性结构通过柔性材料和/或弹性结构布置而获得；
    所述硬质支撑条通过硬质材料和/或刚性结构布置而获得。
  8. 根据权利要求6所述的投影屏幕，其中，所述柔性材料包括硅胶、热塑性弹性体、热塑性聚氨酯橡胶、聚氯乙烯改性软胶以及聚氯乙烯改性橡胶中的至少一种；
    所述硬质材料包括聚对苯二甲酸乙二醇酯、丙烯腈-丁二烯-苯乙烯共聚物、碳纤维、铝合金、聚碳酸酯以及聚氯乙烯中的至少一种。
  9. 根据权利要求5或7所述的投影屏幕，其中，所述弹性结构采用具有热膨胀特征的材料制备得到，使得所述柔性结构的热膨胀系数与所述投影幕布的热膨胀系数之间的比值大于或等于目标阈值；
    和/或，所述刚性结构采用具有热膨胀特征的材料制备得到，使得所述硬质结构的热膨胀系数与所述投影幕布的热膨胀系数之间的比值大于或等于目标阈值。
  10. 根据权利要求1至2，以及，4至9任一所述的投影屏幕，其中，所述投影屏幕还包括：用于使所述投影幕布和所述卷帘组件相连接的连接部，所述连接部分别与所述投影幕布的背面和所述卷帘组件中的多个支撑条固定连接；
    在垂直于所述投影幕布的背面的方向上，所述连接部的厚度小于所述投影幕布的厚度，且小于所述支撑条的厚度。
  11. 根据权利要求10所述的投影屏幕，其中，所述连接部包括：整层的连接片，所述多个支撑条中的至少部分支撑条在所述投影幕布的背面上的正投影，均位于所述连接片在所述投影幕布的背面上的正投影内；
    和/或，所述连接部包括：多个连接条，所述多个连接条与多个支撑条中的至少部分支撑 条一一对应，每个所述连接条在所述投影幕布的背面上的正投影，位于对应的支撑条在所述投影幕布的背面上的正投影内。
  12. 根据权利要求11所述的投影屏幕，其中，当所述连接部包括所述多个连接条时，每个所述连接条的宽度小于对应的支撑条的宽度，且每个所述连接条的在所述投影幕布的背面上的正投影，位于对应的支撑条在所述投影幕布的背面上的正投影的中央区域内。
  13. 根据权利要求10至12任一所述的投影屏幕，其中，所述连接部为具有粘结性的粘接层或者具有磁性的磁性结构。
  14. 根据权利要求13所述的投影屏幕，其中，所述连接部为所述磁性结构，所述连接部包括第一磁性结构以及第二磁性结构，所述第一磁性结构位于所述卷帘组件上，所述第二磁性结构位于所述投影幕布朝向所述卷帘组件的表面上，所述第一磁性结构与所述第二磁性结构相互吸附。
  15. 根据权利要求13所述的投影屏幕，其中，所述连接部为所述磁性结构，所述磁性结构包括第三磁性结构；
    所述支撑条包括：支撑条本体，以及分布在所述支撑条本体内部和表面至少之一的第一磁吸颗粒，所述第一磁吸颗粒包括金属颗粒，和/或，所述投影幕布包括幕布本体和分布于所述幕布本体内部和表面至少之一的第二磁吸颗粒，所述第二磁吸颗粒包括金属颗粒。
  16. 根据权利要求1至15任一项所述的投影屏幕，其中，所述多个支撑条中的至少部分为实心结构，和/或，所述多个支撑条中的至少部分为空心结构。
  17. 根据权利要求1至16任一所述的投影屏幕，其中，所述卷帘组件还包括至少一个拉紧线体，所述拉紧线体沿所述投影幕布的卷曲方向依次贯穿所述多个支撑条；
    所述拉紧线体被配置为，允许所述卷帘组件卷绕布置，且能够使得展开状态下的所述卷帘组件中的支撑条保持张紧。
  18. 根据权利要求1至17任一所述的投影屏幕，其中，所述卷帘组件还包括至少一个限位绳，所述限位绳沿所述投影幕布的卷曲方向依次贯穿所述多个支撑条；
    所述限位绳被配置为，防止所述多个支撑条在平行于所述投影幕布的方向上发生错位。
  19. 根据权利要求1至18任一所述的投影屏幕，其中，所述投影屏幕还包括：基座和升降机构；
    所述卷筒组件和所述升降机构均固定在所述基座上，所述升降机构包括横梁，所述横梁与所述投影幕布的第二端固定连接，所述升降机构被配置为，通过所述横梁控制所述投影幕布中缠绕在所述卷筒上的部分展开。
  20. 一种投影设备，其中，所述投影设备包括投影仪以及权利要求1至19任一所述的投影屏幕。
PCT/CN2023/121972 2022-10-28 2023-09-27 投影屏幕及投影设备 WO2024088007A1 (zh)

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