WO2023025308A1 - 投影装置 - Google Patents

投影装置 Download PDF

Info

Publication number
WO2023025308A1
WO2023025308A1 PCT/CN2022/115260 CN2022115260W WO2023025308A1 WO 2023025308 A1 WO2023025308 A1 WO 2023025308A1 CN 2022115260 W CN2022115260 W CN 2022115260W WO 2023025308 A1 WO2023025308 A1 WO 2023025308A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
screen
tensioning member
protrusion
curtain
Prior art date
Application number
PCT/CN2022/115260
Other languages
English (en)
French (fr)
Inventor
代琪
张健
杨长明
张海鹏
肖伟
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 CN202110994445.6A external-priority patent/CN115729025A/zh
Priority claimed from CN202111188247.7A external-priority patent/CN115963686A/zh
Priority claimed from CN202122963821.3U external-priority patent/CN217425918U/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
Priority to CN202280052558.7A priority Critical patent/CN117882005A/zh
Publication of WO2023025308A1 publication Critical patent/WO2023025308A1/zh

Links

Images

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

Definitions

  • Embodiments of the present disclosure relate to the field of projection technologies, and in particular, to a projection device.
  • laser projection equipment mainly includes an optical engine and a projection screen.
  • the light outlet of the optical engine faces the projection screen to emit light beams to the projection screen, and the projection screen is used to receive the light beams to realize image display.
  • the size of the projection screen is getting larger and larger.
  • some embodiments of the present disclosure provide a projection device, and the projection device includes a projection screen and an optical engine.
  • the projection screen is configured to display projected images.
  • the projection screen includes a frame and a curtain.
  • the frame includes a left frame, a right frame, and a folding mechanism between the left frame and the right frame.
  • the folding mechanism includes a hinge, and the hinge includes a first hinge, a second hinge and a hinge shaft.
  • the first hinge is fixedly connected to the left frame
  • the second hinge is fixedly connected to the right frame
  • the first hinge and the second hinge are connected to the hinge shaft, and can be Rotate about the hinge axis.
  • the screen is fixedly connected with the frame.
  • the optical engine is configured to emit light beams to the projection screen.
  • some embodiments of the present disclosure provide a projection device, and the projection device includes a projection screen and an optical engine.
  • the projection screen is configured to display a projected picture
  • the projection screen includes a frame and a curtain.
  • the frame includes two opposite first frames and a folding mechanism, and the folding mechanism includes two opposite second frames.
  • the screen is fixedly connected to the first frame and the second frame respectively.
  • the optical engine is configured to emit light beams to the projection screen.
  • Respective two ends of the two second frames are detachably connected to respective two ends of the two first frames, and the two second frames and the two first frames enclose a frame .
  • the two second frames are configured to be capable of curling, so that the two second frames can drive the curtain to curl.
  • FIG. 1 is a schematic diagram of a usage state of a projection device provided according to some embodiments of the present disclosure
  • Fig. 2 is a structural diagram of a projection screen provided according to some embodiments of the present disclosure.
  • Fig. 3 is a folded structure diagram of a projection screen provided according to some embodiments of the present disclosure.
  • Fig. 4 is an exploded structure diagram of a projection screen provided according to some embodiments of the present disclosure.
  • Fig. 5 is a partial structural diagram of a frame provided according to some embodiments of the present disclosure.
  • Fig. 6 is a partial structural diagram of a frame provided according to some embodiments of the present disclosure.
  • Fig. 7 is a partial structural diagram of a frame provided according to some embodiments of the present disclosure.
  • Fig. 8 is an exploded structure diagram of a curtain provided according to some embodiments of the present disclosure.
  • Fig. 9 is a front structural view of a curtain provided according to some embodiments of the present disclosure.
  • Fig. 10 is a structural diagram of a projection screen folding process provided according to some embodiments of the present disclosure.
  • Fig. 11 is a partial cross-sectional structure diagram of a projection screen provided according to some embodiments of the present disclosure.
  • Fig. 12 is a partial cross-sectional structure diagram of a projection screen provided according to other embodiments of the present disclosure.
  • Fig. 13 is a partial cross-sectional structure diagram of a projection screen provided according to some other embodiments of the present disclosure.
  • Fig. 14 is a partial cross-sectional structure diagram of a projection screen provided according to some other embodiments of the present disclosure.
  • Fig. 15 is an exploded structure diagram of a projection screen provided according to some embodiments of the present disclosure.
  • Fig. 16 is a front view of another projection screen provided according to some embodiments of the present disclosure.
  • Fig. 17 is an exploded structure diagram of the projection screen shown in Fig. 16;
  • Fig. 18 is an effect diagram of a curled projection screen provided according to some embodiments of the present disclosure.
  • Fig. 19 is a side view of a second frame provided according to some embodiments of the present disclosure.
  • Fig. 20 is a front view of a second frame provided according to some embodiments of the present disclosure.
  • Fig. 21 is an effect diagram after deformation of the first part of the second frame shown in Fig. 20;
  • Fig. 22 is a structural diagram of another projection screen provided according to some embodiments of the present disclosure.
  • Fig. 23 is a partial enlarged view of circle A' in Fig. 22;
  • Fig. 24 is a partially enlarged exploded structure diagram at circle A' in Fig. 22;
  • Fig. 25 is a partial enlarged view of circle B' in Fig. 22;
  • Fig. 26 is a structural diagram of another projection screen provided according to some embodiments of the present disclosure.
  • Figure 27 is a partial enlarged view of circle C' in Figure 26;
  • Fig. 28 is an effect diagram of a projection screen suspended by a suspension part according to some embodiments of the present disclosure.
  • Fig. 29 is a structural diagram of another second frame provided according to some embodiments of the present disclosure.
  • Fig. 30 is a structural diagram of a projection screen with a Fresnel microstructure in the related art
  • Fig. 31 is a structural diagram of a projection screen provided according to some embodiments of the present disclosure.
  • Fig. 32 is a structural diagram of a surface layer provided with a moth-eye structure according to some embodiments of the present disclosure
  • Fig. 33 is a structural diagram of another surface layer provided with a moth-eye structure according to some embodiments of the present disclosure.
  • Fig. 34 is a structural diagram of a reflective layer provided according to some embodiments of the present disclosure.
  • 1000-projection device 100-projection screen; 200-optical engine; 300-audience; 2A-incident light; 2B-exit light;
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality” means two or more.
  • the expressions “coupled” and “connected” and their derivatives may be used.
  • the term “connected” may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other.
  • the term “coupled” may be used when describing some embodiments to indicate that two or more elements are in direct physical or electrical contact.
  • the terms “coupled” or “communicatively coupled” may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other.
  • the embodiments disclosed herein are not necessarily limited by the context herein.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • At least one of A, B, and C has the same meaning as "at least one of A, B, or C" and both include the following combinations of A, B, and C: A only, B only, C only, A and B's A combination, a combination of A and C, a combination of B and C, and a combination of A, B, and C.
  • parallel As used herein, “parallel”, “perpendicular”, and “equal” include the stated situation and the situation similar to the stated situation, the range of the similar situation is within the acceptable deviation range, wherein the The acceptable deviation ranges are as determined by one of ordinary skill in the art taking into account the measurement in question and errors associated with measurement of the particular quantity (ie, limitations of the measurement system).
  • “parallel” includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; Deviation within 5°.
  • “Equal” includes absolute equality and approximate equality, where the difference between the two that may be equal is less than or equal to 5% of either within acceptable tolerances for approximate equality, for example.
  • Exemplary embodiments are described herein with reference to cross-sectional and/or plan views that are idealized exemplary drawings. Accordingly, variations in shape from the drawings as a result, for example, of manufacturing techniques and/or tolerances are contemplated. Thus, example embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. The regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the example embodiments.
  • the size of the projection screen in the projection device is getting bigger and bigger, and it takes up a lot of space.
  • it is difficult to transport it by an elevator, which inevitably increases the difficulty of transporting the projection screen.
  • the following three methods are generally adopted to solve this problem.
  • the first method is to carry the complete projection screen from the stairs to the home by manpower; this method is inefficient, and the projection screen is easy to be bumped during the transportation.
  • the second method is to use a crane to lift the complete projection screen into the home through the window; this method is only suitable for lower floors, and if the projection screen is too large, the window may need to be dismantled, and the cost is high.
  • the third method is to divide the complete projection screen into parts and transport them, and then splice and assemble them to obtain a complete projection screen after being transported into the home. However, since the scattered parts need to be reassembled after the projection screen enters the home, the assembly efficiency of the projection screen is reduced. It can be seen from the above that the above three methods do not actually improve the structure of the projection screen.
  • the projection device 1000 includes a projection screen 100 and an optical engine 200 .
  • the optical engine 200 may be placed in front of and below the projection screen 100 , and the audience 300 is located in front of the projection screen 100 and looks towards the projection screen 100 .
  • the incident light 2A emitted by the optical engine 200 illuminates the projection screen 100 , and the incident light 2A forms an image in the projection screen 100 , and is reflected by the projection screen 100 to finally form an outgoing light 2B to illuminate the audience 300 .
  • the optical engine 200 includes a laser, which includes one or more of a single-color laser, a two-color laser, and a three-color laser. Three-color lasers emit blue, red, and green lasers.
  • the projection screen 100 includes a frame 1 , a curtain 2 , a first tension member 3 and a second tension member 4 .
  • the frame 1 comprises a folding mechanism 10 which enables the frame 1 to be in a folded state or an unfolded state.
  • the curtain 2 is arranged on the front side of the frame 1 , and the front side of the frame 1 is the side facing the audience 300 .
  • the curtain 2 includes four sides, and the four sides include the opposite first side A and the second side B, and the opposite third side C and the fourth side D, the first side A and the second side Side B wraps frame 1.
  • the projection screen 100 includes a plurality of first tension members 3 and a plurality of second tension members 4 .
  • a plurality of first tension members 3 are located on the first side A and a second side B, a plurality of second tension members 4 are located on a third side C and a fourth side D, and a plurality of first tension members 3 and a plurality of second tensioning members 4 are all arranged on the side of the frame 1 away from the curtain 2 (for example, the back of the frame 1, which is opposite to the front of the frame 1).
  • a plurality of first tension members 3 and a plurality of second tension members 4 are used to connect the screen 2 and the frame 1 . For example, as shown in FIG.
  • the first tension member 3 includes a first end 3A and a second end 3B, the first end 3A is connected to the frame 1, and the second end 3B is connected to the curtain 2; as shown in FIG. 15 ,
  • the second tension member 4 includes a first end 4A and a second end 4B, the first end 4A is connected to the frame 1 , and the second end 4B is connected to the curtain 2 .
  • the projection screen 100 when transporting the projection screen 100 with a larger size, the projection screen 100 can be folded based on the foldability of the frame 1 to reduce the transport size of the projection screen 100, thereby facilitating transport; Only need to unfold the frame 1, the light beam emitted by the optical engine 200 can be received through the curtain 2 to realize the display of the picture, thereby improving the assembly efficiency of the projection screen 100 .
  • the side of the screen 100 away from the folding mechanism 10 is to constrain the projection screen 100 in the folded state.
  • the frame 1 includes a left frame 13 and a right frame 14, and the folding mechanism 10 includes a plurality of hinges 15, and the hinges 15 are fixedly connected to the left frame 13 and the right frame 14 respectively, so that based on the hinge 15
  • the folding of the frame 1 can be realized.
  • the frame 1 can be turned out based on a plurality of hinges 15 , and can also be turned inward based on a plurality of hinges 15 .
  • Folding outside means that the fronts of the curtain 2 are opposite to each other after being folded
  • folding inside means that the fronts of the curtain 2 are opposite after being folded.
  • the connection mode of the hinge 15 is different, which is not limited in the present disclosure.
  • the hinge 15 includes a first hinge 151 , a second hinge 152 and a hinge shaft 153 , and the first hinge 151 and the second hinge 152 are rotatably connected to the hinge shaft 153 superior.
  • the first hinge 151 is fixedly connected to the left frame 13
  • the second hinge 152 is fixedly connected to the right frame 14 .
  • the hinge 15 can also be an elastic hinge, and the elastic hinge can keep itself in an unfolded state, so that the frame 1 is in an unfolded state; and the elastic hinge can become a folded state under the action of an external force, so that the Frame 1 is in the folded state.
  • the folding mechanism 10 further includes a fixed beam 6 which is detachably fixedly connected to the frame 1 and used for limiting the frame 1 in an unfolded state.
  • the fixed beam 6 includes a first end 6A and a second end 6B.
  • the first end 6A of the fixed beam 6 is fixedly connected to the left frame 13, and the second end 6B of the fixed beam 6 It is fixedly connected with the right frame 14 to limit the frame 1 in the unfolded state.
  • the fixing beam 6 is disassembled from the left frame 13 and the right frame 14 , and the frame 1 is folded based on a plurality of hinges 15 .
  • first hinge 151 and the second hinge 152 of the hinge 15 have gaps in the axial direction of the hinge shaft 153, when the frame 1 is in the unfolded state, the left frame 13 and the right frame 14 may be misaligned, thereby causing the curtain 2 to break. Distorted, affecting the display effect of Curtain 2. Therefore, when the frame 1 is constrained in the unfolded state by the fixed beam 6, the positions of the left frame 13 and the right frame 14 can also be limited by the fixed beam 6 to ensure that the left frame 13 and the right frame 14 are aligned.
  • the left frame 13 includes a first limiting groove 131, and the first limiting groove 131 is located on the back side of the left frame 13 (that is, the side of the left frame 13 away from the curtain 2);
  • the right frame 14 includes a second limiting groove 141, and the second limiting groove 141 is located on the back of the right frame 14 (that is, the side of the right frame 14 away from the curtain 2).
  • the first end 6A of the fixed beam 6 is set in the first limiting slot 131
  • the second end 6B of the fixing beam 6 is set in the second limiting slot 141 .
  • the fixed beam 6 cooperates with the first limiting groove 131 and the second limiting groove 141 respectively to limit the left frame 13 and the right frame 14 so as to ensure the alignment of the left frame 13 and the right frame 14 .
  • the fixed beam 6 is fixedly connected with the left frame 13 and the right frame 14 respectively by screws f1.
  • the left frame 13 includes a first slideway 132, and the first slideway 132 is located at the back of the left frame 13; the right frame 14 includes a second slideway 142, and the second The slideway 142 is located at the back of the right frame 14 .
  • the fixed beam 6 is located in the first slideway 132 and can slide in the first slideway 132 , and the part of the fixed beam 6 protruding from the first slideway 132 extends into the second slideway 142 when sliding.
  • the fixed beam 6 is located in the second slideway 142 and can slide in the second slideway 142 , and the part of the fixed beam 6 protruding from the second slideway 142 extends into the first slideway 132 when sliding.
  • the fixed beam 6 cooperates with the first slideway 132 and the second slideway 142 respectively, so as to limit the left frame 13 and the right frame 14 to ensure that the left frame 13 and the right frame 14 are aligned.
  • the fixed beam 6 is fixedly connected to the left frame 13 and the right frame 14 respectively by screws f1.
  • the fixed beam 6 can be accommodated in the first slideway 132 or the second slideway 142, so as to prevent the fixed beam from 6 lost.
  • the screen 2 includes an optical film 21 and a flexible carrier 22 , and the flexible carrier 22 includes a receiving portion 23 .
  • the optical film 21 is disposed on one side of the flexible carrier 22 , and the flexible carrier 22 is used as a carrier of the optical film 21 to fix the optical film 21 on the frame 1 .
  • the flexible carrier 22 is a whole structure or a rectangular ring structure with an opening in the central area.
  • the flexible carrier 22 can be synthetic cloth, non-woven fabric, or other flexible parts, as long as it can be bent arbitrarily and has a certain degree of flatness after tension.
  • the outer edge of the flexible carrier 22 is rectangular, that is, the flexible carrier 22 has four sides; in order to ensure the uniformity of force at any position on the sides of the flexible carrier 22, as shown in FIG. The part near the edge of the four sides of 22.
  • the projection screen 100 also includes a pull rod 8, which is accommodated in the accommodating portion 23. At this time, the first tension member 3 and the second tension member 4 are respectively connected to the pull rod 8, so as to Limiting the edge of the flexible carrier 22 is realized.
  • the flexible carrier 22 has The accommodating portion 23 corresponding to the left frame 13 and the accommodating portion 23 corresponding to the right frame 14 , such that the pull rod 8 accommodated in the accommodating portion 23 will not affect the folding of the projection screen 100 .
  • the curtain 2 when the projection screen 100 is folded inward, the curtain 2 is folded for a long time, and memory creases are easily formed at the bends. After the projection screen 100 is unfolded, the memory creases are likely to affect the screen. The display effect of the screen in the middle area of 2.
  • the curtain 2 when the projection screen 100 is turned outward, relative sliding occurs between the curtain 2 and the frame 1, as shown in FIG. 3 , based on the thickness of the frame 1, the curtain 2 can form an arc transition at the bend , so as to avoid forming memory creases on the curtain 2.
  • the curtain 2 can form an arc transition based on its own hardness, and can also form an arc transition based on the support of the curtain 2 by the arc support part formed by the hinge 15 when the frame 1 is folded.
  • the curtain 2 When the projection screen 100 is turned outward, as shown in FIG. 10 , the curtain 2 and the frame 1 slide relative to each other, and there is friction between the curtain 2 and the frame 1 to prevent the relative sliding of the curtain 2 and the frame 1 .
  • the curtain 2 also includes a patch 24, which is arranged on the side of the flexible carrier 22 away from the optical film 21 (i.e. the flexible carrier 22), and close to the third side C and the fourth side D of the curtain 2; the patch 24 wraps the edge of the frame 1.
  • the material of patch 24 is metal.
  • the material of the frame 1 is usually metal, when the projection screen 100 is folded or unfolded, the sticker 24 and the frame 1 actually slide relative to each other, and the surface of the metal is relatively smooth, thereby reducing the contact between the screen 2 and the frame 1. Frictional force when relative sliding occurs between frames 1.
  • the edge of the frame 1 can be ground to improve the smoothness of the edge of the frame 1 and further reduce the friction between the frame 1 and the patch 24 .
  • other materials can also be bonded, as long as the surface of the patch in contact with the frame 1 is smooth.
  • the patch is a smooth adhesive tape, a smooth plastic film, or the like.
  • the projection screen 100 further includes a ball 9 disposed between the patch 24 and the edge of the frame 1 , and the ball 9 can rotate 360°. In this way, not only the contact area between the patch 24 and the frame 1 can be reduced, but also the sliding friction between the patch 24 and the frame 1 can be converted into rolling friction, thereby reducing the contact area between the patch 24 and the frame 1 more effectively. of friction.
  • the four sides of the curtain 2 are relatively stationary with the frame 1, and at this moment, the first tensioning member 3, the second tensioning member 4, the frame 1, and the curtain 2 Both are in a relatively static state, and the first tensioning member 3 and the second tensioning member 4 are used to restrict the four sides of the screen 2 .
  • the curtain 2 and the frame 1 slide relative to each other, and taking the third side C of the curtain 2 to the fourth side D as an example, it is used to define the first side A, the second The first tension member 3 of the side B is not stretched, while the second tension member 4 for defining the third side C and the fourth side D is stretched synchronously with the screen 2 .
  • the second end 3B of the first tension member 3 connected to the curtain 2 is at the side of the curtain 2 Driven to move synchronously with the curtain 2 , the first end 3A of the first tensioning member 3 connected to the back of the frame 1 can be fixed or move synchronously with the curtain 2 .
  • the second end 3B of the first tensioning member 3 is rigidly connected to the curtain 2, that is, when the curtain 2 drives the second end 3B of the first tensioning member 3 to move, the curtain 2 and the first tensioning member 3 There is no relative movement between the second ends 3B, or there is only a small relative movement.
  • the second end 3B of the first tension member 3 is detachably fixedly connected to the pull rod 8 . Since the pull rod 8 is fixedly connected to the second end 3B of the first tension member 3, and the pull rod 8 will not be deformed, when the curtain 2 drives the pull rod 8 to move synchronously with it, the first tension member 3 can be driven by the pull rod 8 The second end 3B moves synchronously therewith, and exerts a force in the moving direction on the second end 3B of the first tension member 3 . This direction of movement is perpendicular to the third side C and the fourth side D of the screen 2 .
  • the first tensioning member 3 When the first end 3A of the first tensioning member 3 is fixed, along with the movement of the second end 3B of the first tensioning member 3, the first tensioning member 3 will tilt, and the first tensioning member 3 will lengthen or shorten. In this case, in order to realize the outward turning of the projection screen 100 , the length of the first tensioning member 3 is adjustable, and the first tensioning member 3 can rotate in a plane parallel to the screen 2 .
  • the first tension member 3 can be a tension spring or other elastic tension members.
  • the first tensioning member 3 When the first end 3A of the first tensioning member 3 moves synchronously with the screen 2, the first tensioning member 3 is in an inclined state, so that the first end 3A of the first tensioning member 3 has a Component forces in the direction of movement.
  • the first end 3A of the first tensioning member 3 in order to realize the outward folding of the projection screen 100 , can move along the length direction of the first side A, and the length of the first tensioning member 3 is adjustable.
  • the second end 3B of the first tensioning member 3 can move along the length direction of the first side A. As shown in FIG.
  • the cross section of the slide rail 11 is circular, and the cross section of the first sliding groove 31 is mostly semicircular.
  • the cross section of the slide rail 11 and the cross section of the first sliding slot 31 can also be in other shapes.
  • the ball 9 is embedded in the inner wall of the first sliding groove 31 , or embedded in the sliding rail 11 .
  • the ball 9 is embedded in the inner wall of the first sliding groove 31, when the first end 3A of the first tensioning member 3 slides relative to the sliding rail 11, the ball 9 on the sliding rail 11 and the first tensioning member 3 can be avoided.
  • the one end 3A collides so as to avoid hindering the movement of the first end 3A of the first tensioning member 3 .
  • the first sliding groove 31 is disposed on the back of the frame 1 , and the first end 3A of the first tensioning member 3 is restricted in the first sliding groove 31 .
  • the frame 1 further includes a first protrusion 12, the first protrusion 12 is arranged on the side of the frame 1 away from the curtain 2, and extends along the length direction of the first side A, the first protrusion 12 includes a first The sliding groove 31 , the first end 3A of the first tensioning member 3 is limited in the first sliding groove 31 .
  • the first protrusion 12 does not include the first slide groove 31 , but includes a strip-shaped first through hole 121 .
  • the first tensioning member 3 passes through the first through hole 121 , and the first end 3A of the first tensioning member 3 is limited on one side of the first protrusion 12 .
  • the restriction of the first tensioning member 3 to the curtain 2 can be realized, and the first end 3A of the first tensioning member 3 can Sliding along the length direction of the first through hole 121 (that is, the length direction of the first side A), so as to ensure that the first tensioning member 3 moves with the curtain 2 .
  • the first protrusion 12 abuts against the first end 3A of the first tensioning member 3 so as to restrict the first end 3A of the first tensioning member 3 .
  • the ball 9 is also disposed between the first protrusion 12 and the contact surface of the first tensioning member 3 . In this way, the frictional force between the first tensioning member 3 and the first protrusion 12 can be reduced.
  • the first tensioning member 3 further includes a tensioning body 32 and a slider 33 , and the tensioning body 32 includes a first end 32A and a second end 32B.
  • the first end 32A of the tensioning body 32 is connected to the curtain 2, and the second end 32B of the tensioning body 32 is connected to the slider 33.
  • the slider 33 is arranged in the first through hole 121 and can be placed in the first through hole 121. slide.
  • the tensioning body 32 is a tensioning spring; or the tensioning body 32 can also be other elastic tensioning parts or non-elastic tensioning parts.
  • the slide block 33 when the slide rail 11 is set on the back side of the frame 1, and the slide block 33 includes the first slide groove 31, the slide block 33 is sleeved on the slide rail 11 and can slide along the slide rail 11;
  • the first protrusion 12 is provided on the back side of the back surface, and the first protrusion 12 includes the first sliding groove 31, the slider 33 is limited in the first sliding groove 31 and can slide in the first sliding groove 31; as shown in Fig. 12 to Fig.
  • the cross section of the slider 33 when the first protrusion 12 is provided on the back of the frame 1, and the first protrusion 12 includes a strip-shaped first through hole 121, the cross section of the slider 33 is T-shaped, and one end of the slider 33 passes through the first through hole 121.
  • a through hole 121 is fixedly connected with the tightening body 32 , and the other end of the slider 33 is limited on one side of the first protrusion 12 .
  • the first protrusion 12 includes a first sub-protrusion 122 and a second sub-protrusion 123, the first sub-protrusion 122 and the second sub-protrusion 123 are plate-shaped, One end of the first sub-protrusion 122 away from the screen 2 is connected to the second sub-protrusion 123, and there is an angle between the first sub-protrusion 122 and the second sub-protrusion 123, so that the first sub-protrusion 12 can not only The first end 3A of the first tensioning member 3 is restricted, and the rotation of the first tensioning member 3 can also be avoided.
  • the first end 3A of the first tensioning member 3 has a certain width along the length direction of the first through hole 121 , so that the first tensioning member 3 can be prevented from rotating through the first through hole 121 .
  • the length of the second tension member 4 is adjustable.
  • the second tension member 4 is an elastic tension member.
  • the second tension member 4 is a tension spring.
  • the third side C and the fourth side D of the curtain 2 respectively tighten the connected two or more second tension members 4, so that the two or more first Two tension members 4 are elongated; when the projection screen 100 is unfolded, the curtain 2 tends to form a bulge at the bend, and at this moment, the third side C and the fourth side D of the curtain 2 can be at two or more Under the action of the elastic force of the second tensioning member 4, it returns to the original position, so that the bulge of the screen 2 is restored to level, thereby ensuring the flatness of the screen 2 .
  • the initial position refers to the position of the curtain 2 when the projection screen 100 is used.
  • the back of the frame 1 has a second protrusion
  • the second protrusion has a second through hole
  • the projection screen further includes a second magnetic part; Fixedly connected, the second end 4B of the second tensioning member 4 passes through the second through hole; the second magnetic member is fixedly connected with the second protrusion, and is located at the second end of the second protrusion and the second tensioning member 4 Between 4B, a mutual repulsion force is formed between the second magnetic part and the second end 4B of the second tensioning part 4 .
  • the structures of the second tensioning member 4, the second protrusion, the second through hole, and the second magnetic member are respectively the same as those of the first tensioning member 3, the first protrusion 12, the first through hole 121, and the first magnetic member described above.
  • the structure of item 7 is similar and will not be repeated here.
  • the function of the second tensioning member 4 can be obtained on the basis of the function of the first tensioning member 3 .
  • the curtain 2 tightens the second tensioning member 4, at this moment, the active force of the curtain 2 acting on the second end 4B of the second tensioning member 4 overcomes the force between the second tensioning member 4 and the second magnetic member.
  • the projection screen 100 when carrying a projection screen 100 with a large size, can be folded based on the foldability of the frame 1, so as to reduce the carrying size of the projection screen 100, thereby facilitating transportation;
  • the frame 1 When projecting the screen 100 , only the frame 1 needs to be unfolded, and the light beam emitted by the optical engine 200 can be received through the curtain 2 to realize the display of the picture, thereby improving the assembly efficiency of the projection screen 100 .
  • the projection screen 100 when the projection screen 100 is turned outward, based on the thickness of the frame 1 , memory creases can be prevented from appearing on the curtain 2 at the bending position, so as to avoid reducing the display effect of the projection screen.
  • the number of the second frame 16 and the number of the first frame 17 in the projection screen 100 are two, and the two second frames 16 are arranged opposite to each other, and the two first frames 17 are arranged opposite to each other.
  • Two ends of the second frame 16 are respectively connected to ends of the two first frames 17, and two ends of the first frame 17 are respectively connected to ends of the two second frames 16 to form a rectangular frame.
  • the second frame 16 in the projection screen 100 is the frame in the direction of the short side of the rectangular frame
  • the first frame 17 in the projection screen 100 is the frame in the direction of the long side of the rectangular frame.
  • the four sides of the screen 2 are fixedly connected with the second frame 16 and the first frame 17 respectively.
  • the four sides of the screen 2 are fixedly connected to the second frame 16 and the first frame 17 by bonding, or by other methods.
  • the second frame 16 can be deformed in a direction perpendicular to the screen 2 , so that the deformed second frame 16 can be curled together with the screen 2 at the same time.
  • the curtain 2 can be curled in the direction perpendicular to the length of the second frame 16 .
  • the overall size of the rolled projection screen 100 is small, which can simplify the difficulty of carrying the projection screen 100 .
  • the second frame 16 After the end of the second frame 16 is connected with the end of the first frame 17 to form a rectangular frame, due to the hindrance of the second tension member 4 connecting the first frame 17 and the second frame 16 (see FIG. 23 ), the second Even if the frame 16 is subjected to a force in a direction perpendicular to the screen 2 or a force in other directions, the second frame 16 is still not easily deformed. In this way, the rectangular frame composed of the second frame 16 and the first frame 17 can effectively support the curtain 2 and ensure that the projection screen can be presented on the curtain 2 .
  • the second frame 16 includes a first portion 161 and a second portion 162 .
  • the first portion 161 and the second portion 162 include a curved portion S and planar portions P located on both sides of the curved portion S.
  • the flat portion P of the first portion 161 is connected to the flat portion P of the second portion 162 , and the curved portion S of the first portion 161 and the curved portion S of the second portion 162 form a cavity a1 .
  • a press is used to crimp the planar portion P of the first portion 161 and the planar portion P of the second portion 162 , so that the planar portion P of the first portion 161 and the planar portion P of the second portion 162 are connected together.
  • the second frame 16 is semi-rigid. That is, the second frame 16 is rigid in a direction parallel to the screen 2 (i.e., the X-axis direction and the Y-axis direction), and the second frame 16 is not easily deformed when subjected to a force in a direction parallel to the screen 2. Therefore, The screen 2 can be effectively supported by the second frame 16 . In the direction perpendicular to the screen 2, the second frame 16 is non-rigid and has elasticity.
  • the curved portion S of the first part 161 in the second frame 16 is subjected to a force perpendicular to the screen 2. It can be deformed when a force is applied in the direction of the second part 162 to adhere to the curved part S of the second part 162 .
  • the thickness of the second frame 16 in the direction perpendicular to the screen 2 is relatively small, so that when the screen 2 is curled with one of the two first frames 17 as the curling axis, the screen 2 can be further lowered. Volume after curling.
  • the first part 161 after a reaction force is applied to the deformed first part 161, the first part 161 can be restored to its undeformed state, so that a cavity a1 can be formed between the first part 161 and the second part 162 .
  • the first part 161 and the second part 162 are elastic sheets, and the first part 161 and the second part 162 can be curled after being deformed, and can play a supporting role before being deformed.
  • the second tension member 4 is used to connect the end of the second frame 16 and the end of the first frame 17 .
  • the end of the second frame 16 can be detachably connected to the end of the first frame 17 through the second tensioning member 4 .
  • the second tension member 4 is configured to drive the screen 2 to move in the length direction of the first frame 17 (ie, the length direction of the first side A) through the second frame 16, so as to adjust the length of the screen 2 on the first frame 17 Tension in direction.
  • the end of the second frame 16 and the end of the first frame 17 are first connected by the second tensioning member 4, and then the screen 2 is adjusted in the first position by the second tensioning member 4.
  • the second tension member 4 drives the second frame 16 along the direction parallel to the length of the first frame 17 and away from the center of the screen 2 Move, and then the second frame 16 drives the curtain 2 to be tensioned.
  • the screen 2 can be stretched along the length direction of the first frame 17 , thereby ensuring a better flatness of the screen 2 .
  • the first frame 17 includes a second chute 171 and a third through hole 172 communicating with the second chute 171 , the second chute 171 and the third through hole 172 It is arranged at the end of the first frame 17 .
  • the lengthwise direction of the second chute 171 and the penetrating direction of the third through hole 172 are both parallel to the lengthwise direction of the first frame 17 .
  • the second tensioning member 4 includes a first connecting member 401 , a third protrusion 402 and an adjusting rod 403 .
  • the first connecting piece 401 is located in the cavity a1 , and the first connecting piece 401 is fixedly connected to the end of the second frame 16 .
  • the first connecting member 401 is connected to the end of the second frame 16 through a screw f1 , and it can also be fixedly connected in other ways.
  • the third protrusion 402 is located in the second slide groove 171 , and the third protrusion 402 is fixedly connected to the first connecting member 401 .
  • the adjustment rod 403 passes through the third through hole 172 and is movably connected with the third protrusion 402 , and the third protrusion 402 can move along the length direction of the adjustment rod 403 .
  • the first frame 17 includes a boss b1, the boss b1 is located in the third through hole 172, and the end of the adjustment rod 403 away from the third protrusion 402 abuts against the boss b1. In this way, after the curtain 2 is tensioned by the second tension member 4, it is possible to prevent the curtain 2 from driving the second tension member 4 to approach the center of the curtain 2 along the length direction parallel to the first frame 17 under the action of its own elastic force. direction to move.
  • the lengthwise direction of the second chute 171 and the penetrating direction of the third through hole 172 are parallel to the lengthwise direction of the first frame 17 , and the first connecting member 401 is connected to the end of the second frame 16 .
  • the third protrusion 402 is located in the second sliding groove 171, and the third protrusion 402 is fixedly connected with the first connecting member 401, and the adjusting rod 403 is movably connected with the third protrusion 402 through the through hole 202, and the third protrusion 402 Can move in the length direction of the adjustment rod 403 .
  • the adjusting rod 403 can drive the first connecting member 401 to move away from the center of the screen 2, and then The first connecting piece 401 can drive the second frame 16 to move away from the center of the screen 2, and the second frame 16 can drive the screen 2 to make it in a tensioned state; or, the adjusting rod 403 can drive the first connecting piece 401 to move closer.
  • the direction of the center of the curtain 2 moves, and then the first connecting member 401 can drive the second frame 16 to move towards the direction close to the center of the curtain 2, and the second frame 16 can drive the curtain 2 to make it in a relaxed state. In this way, the tension degree of the second tension member 4 to the screen 2 in the length direction parallel to the first frame 17 can be adjusted.
  • the third protrusion 402 has a threaded hole
  • the adjusting rod 403 is a screw rod
  • the threaded hole in the third protrusion 402 has an internal thread
  • the adjusting rod 403 has an external thread matching the internal thread of the threaded hole.
  • the third protrusion 402 drives the first connecting part 401 to move away from the center of the screen 2, and then the first connecting part 401 can drive the second frame 16 to move away from the screen 2; or, the third protrusion 402 drives the first connecting part 401 moves toward the center of the screen 2 , and then the first connecting member 401 can drive the second frame 16 to move toward the center of the screen 2 . In this way, the tension degree of the second tension member 4 to the screen 2 in the length direction of the first frame 17 can be adjusted.
  • the second frame 16 includes a first sub-frame 100 a and a second sub-frame 100 b.
  • the first sub-frame 100a includes a first end 100a1 and a second end 100a2;
  • the second sub-frame 100b includes a first end 100b1 and a second end 100b2.
  • the first connecting member 401 is fixed on the first end 100a1 of the first sub-frame 100a and the first end 100b1 of the second sub-frame 100b.
  • the first connecting member 401 is fixedly connected to the first end 100a1 of the first sub-frame 100a and the first end 100b1 of the second sub-frame 100b through screws f1.
  • the first tension member 3 is connected to the second end 100a2 of the first sub-frame 100a and the second end 100b2 of the second sub-frame 100b respectively.
  • the first tension member 3 is configured to adjust the tension of the screen 2 in the length direction of the second frame 16 , so that the screen 2 is in a tensioned state or a loose state in the length direction of the second frame 16 .
  • the first tensioning member 3 includes two second connecting members 301 and elastic elements 302 .
  • the elastic element 302 is located between the two second connecting parts 301, and the two second connecting parts 301 are located in the cavity a1, and are respectively fixed on the second end 100a2 of the first sub-frame 100a and the second end of the second sub-frame 100b. end 100b2.
  • the two second connecting members 301 are fixedly connected to the second end 100a2 of the first sub-frame 100a and the second end 100b2 of the second sub-frame 100b respectively by screws.
  • the screen 2 when the projection screen 100 is unfolded, in the process of adjusting the tension of the screen 2 in the length direction of the second frame 16 through the first tension member 3, the screen 2 is fixedly connected with the second frame 16, the second Two second connecting parts 301 in a tension member 3 are respectively fixedly connected to the second end 100a2 of the first sub-frame 100a and the second end 100b2 of the second sub-frame 100b in the second frame 16, and the elastic elements 302 are
  • the second frame 16 generates an active force directed to the first frame 17, and the two second connecting members 301 drive the first sub-frame 100a and the second sub-frame 100b in the second frame 16 in a direction parallel to the length of the second frame 16. Relative movement occurs, and then the second frame 16 drives the screen 2 to be tensioned. In this way, the curtain 2 can be stretched in the lengthwise direction parallel to the second frame 16 , thereby ensuring better flatness of the curtain 2 .
  • one of the two second connectors 301 includes a fourth protrusion 3011 , and the other includes a groove 3012 matching the shape of the fourth protrusion 3011 and an annular groove. 3013, and at least part of the fourth protrusion 3011 is located in the groove 3012.
  • the groove 3012 is arranged coaxially with the annular groove 3013 .
  • the elastic element 302 between the two second connectors 301 is a compression spring, and the compression spring is sleeved on the fourth protrusion 3011.
  • the two ends of the compression spring are respectively connected to the The two second connecting pieces 301 are in contact, and a part of the compression spring is located in the annular groove 3013 .
  • the compression spring can only move in the direction parallel to the second frame 16, and it is not easy to shake in the direction perpendicular to the second frame 16, so that the connection stability between the first sub-frame 100a and the second sub-frame 100b can be made better.
  • the elastic element 302 may also be an elastic piece, and the present disclosure does not limit the structural form of the elastic element 302 .
  • the shape of the first connecting piece 401, the shape of the second connecting piece 301 matches the shape of the cavity a1, that is, the shape of the cross section of the first connecting piece 401, the shape of the cross section of the second connecting piece 301 and the shape of the cavity a1 match.
  • the shape of the cross-section of the chamber a1 is the same.
  • the first connecting piece 401 and the second connecting piece 301 can be filled in the cavity a1, so that after the end of the second frame 16 is connected with the end of the first frame 17, the second frame 16 is perpendicular to the screen 2
  • the rigidity in the direction is enhanced to ensure that the second frame 16 can effectively support the screen 2 .
  • the projection screen 100 further includes a sealing element disposed on the side walls of the first connecting part 401 and the second connecting part 301 to further improve the sealing performance of the cavity a1.
  • the two second frames 16 are respectively connected to the third side C and the fourth side D of the screen 2 .
  • the folding mechanism 10 also includes a third frame 18 between the two second frames 16, the end of the third frame 18 is detachably connected to the first frame 17, and the third frame 18 is fixedly connected to the screen 2 (such as bonding ). In this way, the support stability of the screen 2 by the third frame 18 and the two second frames 16 is relatively good.
  • the third frame 18 includes a first portion 161 and a second portion 162 , and the structure of the third frame 18 can refer to the above-mentioned second frame 16 .
  • the frame 1 further includes a support member 19 .
  • the supporting member 19 includes a third connecting member 191 and a fifth protrusion 192 .
  • the third connecting piece 191 is fixedly connected to the fifth protrusion 192
  • the third connecting piece 191 is fixedly connected to the end of the third frame 18 .
  • the fifth protrusion 192 includes a screw hole c1 , and the length direction of the screw hole c1 is perpendicular to the length direction of the first frame 17 .
  • the first frame 17 includes an opening d1, and the screw f1 passes through the opening d1 and is connected with the threaded hole c1. In this way, the end of the third frame 18 can be detachably connected to the first frame 17 .
  • the first frame 17 includes a bottom plate 173 and two hanging plates 174 .
  • the end of the rigid bottom plate 173 is connected to the end of the second frame 16 through the second tension member 4 .
  • the two hanging plates 174 are fixedly connected to both sides of the bottom plate 173 respectively.
  • the frame 1 also includes a suspension part 20 .
  • the hanging part 20 includes a hook 201 for engaging with at least one of the two hanging plates 174 . In this way, after the hanging part 20 is fixed on the wall, the hook 201 can be engaged with at least one hanging board 174 to hang the projection screen 100 on the wall.
  • the hanging part 20 may be fixed on the wall by screws f1.
  • the second frame 16 includes a third portion 163 , and the third portion 163 includes a through groove 1631 .
  • the third part 163 is an elastic sheet, for example, the third part 163 is a metal elastic sheet.
  • the third part 163 is used as the second frame 16
  • the second tensioning part 4 and the first tensioning part 3 are arranged in the through groove 1631 and fixedly connected with the third part 163 .
  • the third part 163 can be vertically Deformation occurs in the direction of the curtain 2.
  • the curtain 2 can be rolled in the direction perpendicular to the length of the second frame 16 , so that the overall size of the rolled projection screen 100 is smaller, thereby simplifying the handling difficulty of the projection screen 100 .
  • the second frame 16 is not easily deformed and can effectively support the screen 2 .
  • the optical film 21 is fixed on one side of the flexible carrier 22, the edge of the flexible carrier 22 protrudes from the edge of the optical film 21, the other side of the flexible carrier 22 is attached to the front of the frame 1, and the flexible The part of the carrier 22 protruding from the optical film 21 is folded to the back of the frame 1 , and the edge of the flexible carrier 22 is limited on the back of the frame 1 by the first tension member 3 and the second tension member 4 .
  • the optical film 21 is used to receive the light beam emitted by the optical engine 200 to realize the display of the picture.
  • the optical film 21 can be a white plastic screen, a gray plastic screen or a Fresnel optical screen or have other structures.
  • the optical film 21 is fixed on the flexible carrier 22 by bonding.
  • a side of the flexible carrier 22 away from the optical film 21 is attached to the second frame 16 .
  • the flexible carrier 22 is a flexible cloth, or other flexible parts, as long as it can be bent arbitrarily and has a certain flatness after tension.
  • the projection of the flexible carrier 22 on the plane where the optical film 21 is located covers the optical film 21 or covers the four sides of the optical film 21, so as to ensure that the edges of the flexible carrier 22 stretch out from the four sides of the optical film 21, and then The flatness of the optical film 21 can be guaranteed while the flexible carrier 22 is tightened.
  • the optical engine is generally used with a projection screen with a Fresnel microstructure.
  • a projection screen with a Fresnel microstructure generally includes a layered surface layer 211', a colored layer 216', a diffusion layer 214', a Fresnel lens layer 212' and a reflective layer 213'.
  • the surface layer 211' is used to protect the projection screen.
  • the colored layer 216' is used to increase the contrast of the projection screen.
  • Diffusion particles 215' are distributed in the diffusion layer 214', and the diffusion particles 215' are used to diffuse the light entering the projection screen in different directions.
  • the reflective layer 213' is used to reflect the light entering the projection screen, so that the light re-emits from the surface layer 211'.
  • the light projected by the optical engine 200 When the light projected by the optical engine 200 reaches the surface layer 211', the light is refracted on the surface layer 211', enters the interior of the projection screen, and finally emits from the surface layer 211' to the audience 300, and the audience 300 can watch it on the projection screen. image. However, part of the light projected by the optical engine 200 will be reflected on the surface layer 211', and this part of the reflected light will form a relatively clear image elsewhere (such as the ceiling 109), thereby affecting the viewing experience of the audience 300.
  • the optical film 21 includes a surface layer 211 , a Fresnel lens layer 212 and a reflective layer 213 that are laminated.
  • the surface layer 211 includes a plurality of moth-eye structures 211A, and the plurality of moth-eye structures 211A are disposed on the surface of the surface layer 211 away from the Fresnel lens layer 212 .
  • the moth-eye structure 211A can increase the transmittance and reduce the reflectance, when the light reaches the surface of the surface layer 211 away from the Fresnel lens layer 212, more light will pass through the surface layer 211, Therefore, the reflectivity of the surface is low, so that most of the light projected by the optical engine 200 (about 95% of the incident light 2A) will pass through the surface layer 211, and finally reflect to the audience 300, and only less than 5% of the light will be reflected , so it is not easy to form images in other places, which improves the viewing experience of the audience 300 .
  • the utilization rate of the light projected by the optical engine 200 is higher, and the gain of the projection screen 100 is higher.
  • a plurality of moth-eye structures 211A are evenly disposed on the surface of the surface layer 211 away from the Fresnel lens layer 212, so that the surface layer 211 is away from the Fresnel lens layer Various locations across the surface on one side of 12 have lower reflectivity. After the light projected by the optical engine 200 reaches any position on the surface, more light can pass through the surface. After passing through the Fresnel lens layer 212 and the reflective layer 213 , the light is reflected to the eyes of the audience 300 .
  • a plurality of moth-eye structures 211A may also be randomly arranged on the surface of the surface layer 211 away from the Fresnel lens layer 212 , which can also better reduce the reflectivity of the surface.
  • a plurality of moth-eye structures 211A are arranged at intervals on the surface of the surface layer 211 away from the Fresnel lens layer.
  • the distribution of the moth-eye structures 211A on the surface of the surface layer 211 is more dispersed, and the fabrication is more convenient.
  • there is a fixed interval between two adjacent moth-eye structures 211A for example, the interval is 50 nm, 100 nm or 150 nm.
  • the distance between two adjacent moth-eye structures 211A changes with a predetermined rule, for example, gradually increases or decreases within the range of 50 nm ⁇ 150 nm. Therefore, it can have a better effect of reducing reflectivity.
  • a plurality of moth-eye structures 211A are arranged at intervals along the length direction X and the width direction Y of the surface layer 211 . That is, the moth-eye structures 211A are arranged in multiple rows along the width direction Y of the surface layer 211 , and each row is provided with a plurality of moth-eye structures 211A along the length direction X of the surface layer 211 .
  • the distance between two adjacent moth-eye structures 211A is 50 nm
  • the width direction Y the distance between two adjacent moth-eye structures 211A is 150 nm.
  • the distance between two adjacent moth-eye structures 211A along the length direction X and the distance between two adjacent moth-eye structures 211A along the width direction Y are both 100 nm, so that the moth-eye structures 211A The distribution is more dispersed and the production is more convenient.
  • two adjacent moth-eye structures 211A are in contact with each other.
  • the moth-eye structures 211A on the surface of the surface layer 211 are relatively dense, which can ensure that the surface has a low reflectivity, and ensure that more light projected by the optical engine 200 can pass through the surface.
  • the shape of the moth-eye structure 211A includes at least one of a cylinder, a cone, a pyramid, and a parabola.
  • the above moth-eye structures 211A of different shapes all have a good effect of reducing reflectivity, which can ensure that most of the light projected by the optical engine 200 passes through the surface of the surface layer 211 away from the Fresnel lens layer 212 and enters the to the inside of the optical film 21, and finally reflected to the eyes of the audience 300.
  • Moth-eye structures 211A of various shapes may be provided on the surface of the surface layer 211 away from the Fresnel lens layer 212 .
  • cylindrical and conical moth-eye structures 211A may be provided on the surface at the same time.
  • a single-shaped moth-eye structure 211A may also be provided on the surface.
  • the moth-eye structure 211A is cylindrical in shape. Since the cylindrical shape structure is simpler, it is easier to manufacture the cylindrical moth-eye structure 211A.
  • the diameter of the moth-eye structure 211A when the shape of the moth-eye structure 211A is cylindrical, the diameter of the moth-eye structure 211A is 30nm-60nm, thus, the surface layer 211 can be greatly reduced on the side away from the Fresnel lens layer 212.
  • the reflectivity of the surface makes it difficult for light to reflect on the surface, so that the light projected by the optical engine 200 is difficult to form an image elsewhere.
  • the diameter of the moth-eye structure 211A can also be other values, as small as tens of nanometers, as large as several microns, which can achieve the effect of reducing the reflectivity, and the specific value can be selected according to the actual situation.
  • the diameter of the moth-eye structure 211A is 30nm, 45nm, 50nm or 60nm, all of which can achieve a better effect of reducing the reflectivity.
  • moth-eye structures 211A of different diameters may be provided on the surface of the surface layer 211 away from the Fresnel lens layer 212 at the same time.
  • moth-eye structures 211A with diameters of 30nm, 45nm and 60nm may exist on the surface at the same time, thereby achieving a better effect of reducing reflectivity.
  • the height of the cylindrical moth-eye structure 211A is 250 nm ⁇ 350 nm, for example, the height of the moth-eye structure 211A is 250 nm, 300 nm or 350 nm. Therefore, the effect of reducing the reflectance of the surface of the surface layer 211 away from the Fresnel lens layer 212 is better.
  • the heights of the multiple moth-eye structures 211A are different, that is, the surface of the surface layer 211 away from the Fresnel lens layer 212 is provided with moth-eye structures 211A of different heights.
  • moth-eye structures 211A having heights of 250 nm, 300 nm, and 350 nm exist simultaneously on the surface. From the principle of reducing the reflectivity of the moth-eye structure 211A, it can be seen that when light reaches the surface layer 211, the moth-eye structure 211A cannot be recognized. It can be equivalently considered that the refractive index of the surface changes continuously along the thickness direction, thereby reducing the refraction.
  • the reflection effect caused by the sharp change of the refractive index (the greater the difference between the refractive index of the two media, the greater the reflectivity), so as to achieve the effect of reducing the reflectivity of the surface.
  • the equivalent refractive index changes more continuously and smoothly, so that the reflectivity can be reduced more effectively.
  • the optical film 21 further includes a diffusion layer 214 and diffusion particles 215, the diffusion layer 214 is disposed between the surface layer 211 and the Fresnel lens layer 212, and the diffusion particles 215 are distributed in the diffusion layer 214 Inside.
  • the light entering the optical film 21 first passes through the diffusion layer 214 , and is diffused in all directions under the action of the diffusion particles 215 , so that the viewing angle of the projection screen 100 increases.
  • the coherence between the diffused light rays is weak, which reduces the degree of interference of the light rays on the surface of the projection screen 100 , thereby reducing the severity of speckles appearing on the surface of the projection screen 100 .
  • the diffusion particles 215 are made of polymethyl methacrylate (PMMA).
  • the diffusion layer 214 can be made of flexible material, for example, the diffusion layer 214 can be made of polyethylene terephthalate (Polyethylene Terephthalate, PET) material.
  • PET Polyethylene Terephthalate
  • the PET material is flexible, so that the diffusion layer 214 is flexible and can be rolled.
  • the diffusion layer 214 can also be made of other flexible materials, for example, the diffusion layer 214 can be made of thermoplastic polyurethane elastomer (Thermoplastic Polyurethanes, TPU) material, TPU has elasticity and can be curled.
  • the diffusion layer 214 can also be made of flexible styrenic block copolymers (Styrenic Block Copolymers, SBC).
  • the optical film 21 further includes a colored layer 216, the colored layer 216 is arranged between the surface layer 211 and the diffusion layer 214, and a dark dye is arranged in the colored layer 216, and the dark dye can absorb the outside world. ambient light, thereby increasing the contrast of the projection screen 100.
  • Dark dyes are generally organic dyes, and dyes such as azo dyes and phthalocyanine dyes can be selected.
  • Colored layer 216 can be made of Methyl Methacrylate-styrene copolymer (Methyl Methacrylate-styrene Copolymer, MS) material or PET material, when colored layer 216 was made of PET material, colored layer 216 has flexibility, can carry out curly.
  • Methyl Methacrylate-styrene copolymer Metal Methacrylate-styrene Copolymer, MS
  • PET material when colored layer 216 was made of PET material, colored layer 216 has flexibility, can carry out curly.
  • the optical film 21 further includes a substrate layer 217, the substrate layer 217 is located between the surface layer 211 and the Fresnel lens layer 212, and the substrate layer 217 can serve as an optical film 21 support base.
  • the number of base material layers 217 can be multiple, and the number of base material layers 217 is two as an example, wherein one base material layer 217 is located between the surface layer 211 and the colored layer 216, and the other base material layer 217 is located in the diffusion layer 214 and the Fresnel lens layer 212.
  • a substrate layer 217 close to the surface layer 211 can be used as a base for fabricating the surface layer 211
  • a base layer 217 close to the Fresnel lens layer 212 can be used as a base for fabricating the Fresnel lens layer 212 .
  • the material of the substrate layer 217 may be a flexible material.
  • the substrate layer 217 is made of PET material, TPU material or SBC material, and the above materials are flexible, so that the substrate layer is flexible, so that the optical film 21 can be curled.
  • the substrate layer 217 may be made of polyvinyl chloride, polypropylene or polyethylene material.
  • Polyvinyl chloride has the advantages of good dimensional stability, good weather resistance and low cost, and can use plasticizers to adjust the softness and hardness.
  • Dimensional stability refers to the property that the material does not change its external dimensions under the action of mechanical force, heat or other external conditions.
  • Weather resistance refers to the ability of the material to withstand the comprehensive damage caused by the test of the weather (such as light, cold and heat, wind and rain, bacteria) when it is applied outdoors.
  • Polypropylene has the advantages of easy dyeing, light texture, good toughness, high temperature resistance and chemical resistance.
  • Polyethylene has the advantages of excellent low temperature resistance and good chemical stability, and can resist the erosion of most acids and alkalis.
  • the reflective material of the reflective layer 213 is aluminum. In other embodiments, the reflective material of the reflective layer 213 is silver, or a combination of silver and aluminum.
  • powdered aluminum powder can be selected, because the powdered aluminum powder is finer, and the directionality of the light reflected by the aluminum powder is not obvious Most of the light emitted by the optical engine 200 can be directionally reflected out of the projection screen 100 according to the configuration of the microstructure of the Fresnel lens layer 212 without random reflection of the light, so that the gain of the projection screen 100 is relatively high.
  • the diameter of the aluminum particles may range from 5um to 20um.
  • the aluminum particles within this range due to their small diameter, form a dense reflective surface after the reflective layer 213 is formed. waste.
  • the reflective layer 213 can be made very thin, so that the consumption of aluminum material can be saved, and the production cost can be saved.
  • the reflective material of the reflective layer 213 is flaky aluminum powder, which has a circular flake structure, and the flaky aluminum powder has a large diameter-thickness ratio, for example, the range of its aspect ratio It can be between (40:1) and (100:1). Within this range, aluminum has a strong binding ability and is not easy to fall off.
  • the diameter-thickness ratio is the ratio of diameter to thickness.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

一种投影装置（1000），投影装置（1000）包括投影屏幕（100）和光学引擎（200）。投影屏幕（100）被配置为显示投影画面。投影屏幕（100）包括框架（1）和幕布（2）。框架（1）包括左边框（13）、右边框（14）和位于左边框（13）和右边框（14）之间的折叠机构（10）。折叠机构（10）包括铰链（15），铰链（15）包括第一合页（151）、第二合页（152）和铰接轴（153）。第一合页（151）与左边框（13）固定连接，第二合页（152）与右边框（14）固定连接，第一合页（151）和第二合页（152）与铰接轴（153）相连，且可围绕铰接轴（153）旋转。幕布（2）与框架（1）固定连接。光学引擎（200）被配置为将光束出射至投影屏幕（100）。

Description

投影装置
本申请要求于2021年11月29日提交的、申请号为202122963821.3的中国专利申请的优先权、于2021年08月27日提交的、申请号为202110994445.6的中国专利申请的优先权、以及于2021年10月12日提交的、申请号为202111188247.7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
本公开实施例涉及投影技术领域，特别涉及一种投影装置。
背景技术
随着科技的不断发展，激光投影设备越来越多的应用于人们的工作和生活中。目前，激光投影设备主要包括光学引擎和投影屏幕。光学引擎的出光口朝向投影屏幕，以出射光束至投影屏幕，投影屏幕用于接收该光束，以实现画面的显示。而为了提高观看效果和护眼效果，投影屏幕的尺寸越来越大。
发明内容
一方面，本公开一些实施例提供一种投影装置，所述投影装置包括投影屏幕和光学引擎。所述投影屏幕被配置为显示投影画面。所述投影屏幕包括框架和幕布。所述框架包括左边框、右边框和位于所述左边框和所述右边框之间的折叠机构。所述折叠机构包括铰链，所述铰链包括第一合页、第二合页和铰接轴。所述第一合页与所述左边框固定连接，所述第二合页与所述右边框固定连接，所述第一合页和所述第二合页与所述铰接轴相连，且可围绕所述铰接轴旋转。所述幕布与所述框架固定连接。所述光学引擎被配置为将光束出射至所述投影屏幕。
另一方面，本公开一些实施例提供一种投影装置，所述投影装置包括投影屏幕和光学引擎。所述投影屏幕被配置为显示投影画面，所述投影屏幕包括框架和幕布。所述框架包括两个相对设置的第一边框和折叠机构，所述折叠机构包括两个相对设置的第二边框。所述幕布分别与所述第一边框和所述第二边框固定连接。所述光学引擎被配置为将光束出射至所述投影屏幕。所述两个第二边框的各自的两端分别与所述两个第一边框的各自的两端可拆卸地连接，且所述两个第二边框与所述两个第一边框围成框架。所述两个第二边框被配置为能够发生卷曲，以使所述两个第二边框能够带动所述幕布卷曲。
附图说明
图1是根据本公开一些实施例提供的投影装置的使用状态示意图；
图2是根据本公开一些实施例提供的一种投影屏幕的结构图；
图3是根据本公开一些实施例提供的一种投影屏幕折叠后的结构图；
图4是根据本公开一些实施例提供的一种投影屏幕的爆炸结构图；
图5是根据本公开一些实施例提供的一种框架的局部结构图；
图6是根据本公开一些实施例提供的一种框架的局部结构图；
图7是根据本公开一些实施例提供的一种框架的局部结构图；
图8是根据本公开一些实施例提供的一种幕布的爆炸结构图；
图9是根据本公开一些实施例提供的一种幕布的主视结构图；
图10是根据本公开一些实施例提供的一种投影屏幕折叠过程的结构图；
图11是根据本公开一些实施例提供的一种投影屏幕的局部剖面结构图；
图12是根据本公开另一些实施例提供的一种投影屏幕的局部剖面结构图；
图13是根据本公开又一些实施例提供的一种投影屏幕的局部剖面结构图；
图14是根据本公开又一些实施例提供的一种投影屏幕的局部剖面结构图；
图15是根据本公开一些实施例提供的一种投影屏幕的爆炸结构图；
图16是根据本公开一些实施例提供的另一种投影屏幕的正视图；
图17是图16示出的投影屏幕的爆炸结构图；
图18是根据本公开一些实施例提供的一种投影屏幕卷曲后的效果图；
图19是根据本公开一些实施例提供的一种第二边框的侧视图；
图20是根据本公开一些实施例提供的一种第二边框的正视图；
图21是图20示出的第二边框中的第一部分进行形变后的效果图；
图22是根据本公开一些实施例提供的又一种投影屏幕的结构图；
图23是图22中圈A’处的局部放大图；
图24是图22中圈A’处的局部放大的爆炸结构图；
图25是图22中圈B’处的局部放大图；
图26是根据本公开一些实施例提供的又一种投影屏幕的结构图；
图27是图26中圈C’处的局部放大图；
图28是根据本公开一些实施例提供的一种悬挂部悬挂投影屏幕的效果图；
图29是根据本公开一些实施例提供的另一种第二边框的结构图；
图30是相关技术中具有菲涅尔微结构的投影屏幕的结构图；
图31是根据本公开一些实施例提供的一种投影屏幕的结构图；
图32是根据本公开一些实施例提供的一种设有蛾眼结构的表面层的结构图；
图33是根据本公开一些实施例提供的另一种设有蛾眼结构的表面层的结构图；
图34是根据本公开一些实施例提供的一种反射层的结构图；
图35是根据本公开一些实施例提供的另一种反射层的结构图。
附图标记：
1000-投影装置；100-投影屏幕；200-光学引擎；300-观众；2A-入射光线；2B-出射光线；
1-框架；11-滑轨；12-第一凸起；121-第一通孔；122-第一子凸起；123-第二子凸起；13-左边框；131-第一限位槽；132-第一滑道；14-右边框；141-第二限位槽；142-第二滑道；17-第一边框；171-第二滑槽；172-第三通孔；173-底板；174-挂板；b1-凸台；d1-开孔；f1-螺钉；18-第三边框；19-支撑件；191-第三连接件；192-第五凸起；c1-螺纹孔；20-悬挂部；201-卡钩；
2-幕布；A-第一侧边；B-第二侧边；C-第三侧边；D-第四侧边；21-光学膜片；22-柔性载体；23-容置部；24-贴片；211-表面层；211A-蛾眼结构；212-菲涅尔透镜层；213-反射层；214-扩散层；215-扩散粒子；216-着色层；217-基材层；
3-第一拉紧件；3A-第一拉紧件的第一端；3B-第一拉紧件的第二端；31-第一滑槽；32-拉紧本体；32A-拉紧本体的第一端；32B-拉紧本体的第二端；33-滑块；301-第二连接件；3011-第四凸起；3012-凹槽；3013-环状凹槽；302-弹性元件；
4-第二拉紧件；4A-第二拉紧件的第一端；4B-第二拉紧件的第二端；401-第一连接件；402-第三凸起；403-调节杆；
5-固定夹；7-第一磁性件；8-拉杆；9-滚珠；
10-折叠机构；15-铰链；151-第一合页；152-第二合页；153-铰接轴；6-固定梁；6A-固定梁的第一端；6B-固定梁的第二端；16-第二边框；161-第二边框的第一部分；162-第二边框的第二部分；163-第三部分；1631-通槽；S-弯曲部；P-平面部；T-平面；a1-空腔；100a-第一子边框；100a1-第一子边框的第一端；100a2-第一子边框的第二端；100b-第二子边框；100b1-第二子边框的第一端；100b2-第二子边框的第二端；
211’-表面层；216’-着色层；214’-扩散层；212’-菲涅尔透镜层；213’-反射层；215’-扩散粒子；109-天花板。
具体实施方式
下面将结合附图，对本公开一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开所提供的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施 例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在描述一些实施例时，可能使用了“耦接”和“连接”及其衍伸的表达。例如，描述一些实施例时可能使用了术语“连接”以表明两个或两个以上部件彼此间有直接物理接触或电接触。又如，描述一些实施例时可能使用了术语“耦接”以表明两个或两个以上部件有直接物理接触或电接触。然而，术语“耦接”或“通信耦合(communicatively coupled)”也可能指两个或两个以上部件彼此间并无直接接触，但仍彼此协作或相互作用。这里所公开的实施例并不必然限制于本文内容。
“A和/或B”，包括以下三种组合：仅A，仅B，及A和B的组合。
A、B和C中的至少一个”与“A、B或C中的至少一个”具有相同含义，均包括以下A、B和C的组合：仅A，仅B，仅C，A和B的组合，A和C的组合，B和C的组合，及A、B和C的组合。
如本文所使用的那样，“约”、“大致”或“近似”包括所阐述的值以及处于特定值的可接受偏差范围内的平均值，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。
如本文所使用的那样，“平行”、“垂直”、“相等”包括所阐述的情况以及与所阐述的情况相近似的情况，该相近似的情况的范围处于可接受偏差范围内，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。例如，“平行”包括绝对平行和近似平行，其中近似平行的可接受偏差范围例如可以是5°以内偏差；“垂直”包括绝对垂直和近似垂直，其中近似垂直的可接受偏差范围例如也可以是5°以内偏差。“相等”包括绝对相等和近似相等，其中近似相等的可接受偏差范围内例如可以是相等的两者之间的差值小于或等于其中任一者的5％。
本文参照作为理想化示例性附图的剖视图和/或平面图描述了示例性实施方式。因此，可设想到由于例如制造技术和/或公差引起的相对于附图的形状的变动。因此，示例性实施方式不应解释为局限于本文示出的区域的形状，而是包括因例如制造而引起的形状偏差。附图中所示的区域本质上是示意性的，且它们的形状并非旨在示出设备的区域的实际形状，并且并非旨在限制示例性实施方式的范围。
相关技术中，投影装置中的投影屏幕的尺寸越来越大，所占的空间较大，在入户时，难以通过电梯运输，从而不可避免地会增加投影屏幕的运输难度。为了保证大尺寸投影屏幕的正常搬运及入户，在相关技术中，一般采用如下三种方式解决此问题。
第一种方式，通过人力将完整的投影屏幕从楼梯搬运入户；此种方式效率低，投影屏幕容易在搬运的过程中受到磕碰。第二种方式，利用吊车，将完整的投影屏幕通过窗户吊装入户；此种方式仅适用于楼层较低的情况，若投影屏幕过大可能还需要拆卸窗户，成本较高。第三种方式，将完整的投影屏幕分成散件后搬运，待搬运入户之后再拼接组装得到完整的投影屏幕。然而，由于在投影屏幕入户后需要对散件重新组装，降低了投影屏幕的组装效率。由上述可知，以上三种方式实际上对投影屏幕的结构没有任何的改进。
为此，如图1所示，本公开一些实施例提供一种投影装置1000。投影装置1000包括投影屏幕100和光学引擎200。投影装置1000在使用时，光学引擎200可以放置在投影屏幕100的前下方，观众300位于投影屏幕100的前方并看向投影屏幕100。光学引擎200发出的入射光线2A照向投影屏幕100，入射光线2A在投影屏幕100中成像，并经过投影屏幕100的 反射后最终形成出射光线2B照向观众300。
光学引擎200包括激光器，该激光器包括单色激光器、双色激光器和三色激光器中的一种或多种。三色激光器可发射蓝色激光、红色激光以及绿色激光。
在一些实施例中，如图2、图4所示，投影屏幕100包括框架1、幕布2、第一拉紧件3和第二拉紧件4。框架1包括折叠机构10，折叠机构10能够使框架1处于折叠状态或展开状态。幕布2设置于框架1的正面的一侧，框架1的正面即为面向观众300一面。幕布2包括四个侧边，四个侧边包括相对的第一侧边A和第二侧边B，以及相对的第三侧边C和第四侧边D，第一侧边A和第二侧边B包裹框架1。示例地，投影屏幕100包括多个第一拉紧件3和多个第二拉紧件4。多个第一拉紧件3位于第一侧边A和第二侧边B，多个第二拉紧件4位于第三侧边C和第四侧边D，且多个第一拉紧件3和多个第二拉紧件4均设置于框架1远离幕布2的一侧(例如，框架1的背面，该背面与框架1的正面相对)。多个第一拉紧件3和多个第二拉紧件4用于连接幕布2与框架1。示例地，如图11所示，第一拉紧件3包括第一端3A和第二端3B，第一端3A与框架1相连，第二端3B与幕布2相连；如图15所示，第二拉紧件4包括第一端4A和第二端4B，第一端4A与框架1相连，第二端4B与幕布2相连。
由此，在搬运尺寸较大的投影屏幕100时，能够基于框架1的可折叠性，对投影屏幕100进行折叠，以缩小投影屏幕100的搬运尺寸，从而方便搬运；而在使用投影屏幕100时只需要展开框架1，即可通过幕布2接收光学引擎200出射的光束实现画面的显示，从而提高了投影屏幕100的组装效率。
在一些实施例中，在投影屏幕100折叠后，如图3所示，投影屏幕100还包括固定夹5，固定夹5夹紧在折叠后的投影屏幕100上，例如固定夹5夹紧在投影屏幕100远离折叠机构10的一侧，以将投影屏幕100限制在折叠状态。
在一些实施例中，如图4所示，框架1包括左边框13、右边框14，折叠机构10包括多个铰链15，铰链15分别与左边框13、右边框14固定连接，这样基于铰链15即可实现框架1的折叠。框架1可基于多个铰链15进行外翻折，也可基于多个铰链15进行内翻折。外翻折是指折叠后幕布2的正面相背，内翻折是指折叠后幕布2的正面相对。对于外翻折或者内翻折，铰链15的连接方式不同，本公开对此不做限定。
在一些实施例中，如图2所示，铰链15包括第一合页151、第二合页152和铰接轴153，第一合页151和第二合页152可旋转地连接在铰接轴153上。对于包括左边框13和右边框14的框架1，第一合页151与左边框13固定连接，第二合页152与右边框14固定连接。此外，在一些实施例中，铰链15也可以为弹性铰链，弹性铰链能够使其自身保持在展开状态，从而使得框架1处于展开状态；且弹性铰链能够在外力作用下变为折叠状态，从而使得框架1处于折叠状态。
示例地，如图4所示，折叠机构10还包括固定梁6，固定梁6可拆卸地固定连接在框架1上，固定梁6用于将框架1限制在展开状态。如图5所示，固定梁6包括第一端6A和第二端6B。以框架1包括左边框13和右边框14为例，在使用投影屏幕100时将框架1展开，将固定梁6的第一端6A与左边框13固定连接，将固定梁6的第二端6B与右边框14固定连接，以将框架1限制在展开状态。在运输投影屏幕100时，将固定梁6从左边框13和右边框14上拆卸下来，并基于多个铰链15实现框架1的折叠。
由于铰链15的第一合页151和第二合页152在铰接轴153的轴向上具有间隙，在框架1处于展开状态时，左边框13和右边框14可能出现错位，从而造成幕布2发生扭曲，影响幕布2的显示效果。因此，在通过固定梁6将框架1限制在展开状态时，还能够通过固定梁6限定左边框13和右边框14的位置，保证左边框13和右边框14对齐。
在一些实施例中，如图5所示，左边框13包括第一限位槽131，第一限位槽131位于左边框13的背面(即左边框13远离幕布2的一侧)；右边框14包括第二限位槽141，第二限位槽141位于右边框14背面(即右边框14远离幕布2的一侧)。固定梁6的第一端6A设置在第一限位槽131内，固定梁6的第二端6B设置在第二限位槽141内。固定梁6分别与第一限位槽131、第二限位槽141配合，以对左边框13、右边框14进行限位，从而保证左边框13和右边框14对齐。之后，再通过螺钉f1将固定梁6分别与左边框13、右边框14固定连 接。
在另一些实施例中，如图6或图7所示，左边框13包括第一滑道132，第一滑道132位于左边框13的背面；右边框14包括第二滑道142，第二滑道142位于右边框14的背面。固定梁6位于第一滑道132内，且可以在第一滑道132内滑动，固定梁6滑动时伸出第一滑道132的部分伸入第二滑道142。或者，固定梁6位于第二滑道142内，且可以在第二滑道142内滑动，固定梁6滑动时伸出第二滑道142的部分伸入第一滑道132。
这样，固定梁6分别与第一滑道132、第二滑道142配合，从而对左边框13、右边框14进行限位，以保证左边框13和右边框14对齐。之后，再通过螺钉f1将固定梁6分别与左边框13、右边框14固定连接。另外，在折叠投影屏幕100时，将固定梁6从左边框13和右边框14上拆卸下来后，可将固定梁6收容在第一滑道132或第二滑道142内，以避免固定梁6丢失。
在一些实施例中，如图8和图9所示，幕布2包括光学膜片21和柔性载体22，柔性载体22包括容置部23。光学膜片21设置于柔性载体22的一侧，柔性载体22作为光学膜片21的载体，将光学膜片21固定在框架1上。柔性载体22为一整片结构或者中心区域具有开口的矩形环状结构。柔性载体22可以为合成布、无纺布，也可以为其他柔性件，只要能够任意弯折，且张紧后具有一定的平整度即可。示例地，柔性载体22的外边缘呈矩形，即柔性载体22具有四条侧边；为了保证柔性载体22侧边的任意位置受力的均匀性，如图4所示，容置部23位于柔性载体22的四条侧边的靠近边缘的部分。如图4和图11所示，投影屏幕100还包括拉杆8，拉杆8容置于容置部23内，此时第一拉紧件3和第二拉紧件4分别与拉杆8连接，以实现对柔性载体22的边缘的限位。
以幕布2的第三侧边C向第四侧边D对折为例，如图9所示，柔性载体22在其相对的侧边(即第一侧边A和第二侧边B)处具有对应左边框13的容置部23和对应右边框14的容置部23，这样容置在容置部23内的拉杆8不会影响投影屏幕100的折叠。
在一些实施例中，当投影屏幕100进行内翻折时，幕布2经长时间折叠，容易在弯折处形成记忆折痕，这样在投影屏幕100展开后，因存在记忆折痕，容易影响幕布2的中部区域画面的显示效果。
在另一些实施例中，当投影屏幕100进行外翻折时，幕布2与框架1之间发生相对滑动，如图3所示，基于框架1的厚度幕布2可在弯折处形成弧形过渡，从而避免在幕布2上形成记忆折痕。幕布2可基于自身的硬度形成弧形过渡，也可基于框架1折叠时由铰链15形成的弧形支撑部对幕布2的支撑形成弧形过渡。
当投影屏幕100进行外翻折时，如图10所示，幕布2与框架1发生相对滑动，此时幕布2与框架1之间存在摩擦力，以阻碍幕布2与框架1的相对滑动。为了便于投影屏幕100进行外翻折，同时避免摩擦力较大造成幕布2的损坏，幕布2还包括贴片24，贴片24设置于柔性载体22远离光学膜片21的一侧(即柔性载体22的背面)，且靠近幕布2的第三侧边C和第四侧边D；贴片24包裹框架1的边缘。贴片24的材料为金属。由于框架1的材料通常为金属，在投影屏幕100进行外翻折或展开时，实质上是贴片24与框架1之间发生相对滑动，且金属的表面较为光滑，从而能够减小幕布2与框架1之间发生相对滑动时的摩擦力。此外，可对框架1的边缘进行打磨，以提高框架1的边缘的光滑度，进一步减小框架1与贴片24之间的摩擦力。除了在柔性载体22的背面粘接贴片24外，还可粘接其他材质的贴片，只要该贴片与框架1接触的表面光滑即可。示例地，该贴片为光滑的胶带、光滑的塑料膜等。
由于贴片24与框架1的边缘为面接触，而摩擦力与接触面积成正比，因此，可通过减小贴片24与框架1的接触面积以进一步减小摩擦力。示例地，如图10所示，投影屏幕100还包括滚珠9，滚珠9设置于贴片24与框架1的边缘之间，且滚珠9可360°旋转。这样不仅可以减小贴片24与框架1之间的接触面积，还能够将贴片24与框架1之间的滑动摩擦转换为滚动摩擦，从而更有效地减小贴片24与框架1之间的摩擦力。
在一些实施例中，当投影屏幕100进行内翻折时，幕布2的四个侧边与框架1相对静止，此时第一拉紧件3、第二拉紧件4、框架1、幕布2均处于相对静止的状态，第一拉紧件3和第二拉紧件4用于对幕布2的四个侧边进行限制。
当投影屏幕100进行外翻折时，幕布2与框架1发生相对滑动，且以幕布2的第三侧边C向第四侧边D对折为例，用于限定第一侧边A、第二侧边B的第一拉紧件3不被拉伸，而用于限定第三侧边C、第四侧边D的第二拉紧件4则与幕布2同步被拉伸。
在一些实施例中，由于幕布2在与第三侧边C和第四侧边D垂直的方向上被拉伸，因此第一拉紧件3的连接幕布2的第二端3B在幕布2的带动下与幕布2同步移动，第一拉紧件3的连接框架1的背面的第一端3A可固定不动，也可与幕布2同步移动。示例地，第一拉紧件3的第二端3B与幕布2之间为硬性连接，即幕布2带动第一拉紧件3的第二端3B移动时，幕布2与第一拉紧件3的第二端3B之间不会发生相对移动，或者只存在很小的相对移动。
示例地，第一拉紧件3的第二端3B与拉杆8可拆卸地固定连接。由于拉杆8与第一拉紧件3的第二端3B固定连接，且拉杆8不会发生变形，在幕布2带动拉杆8与之同步移动时，能够通过拉杆8带动第一拉紧件3的第二端3B与之同步移动，并在第一拉紧件3的第二端3B上施加在移动方向上的作用力。该移动方向与幕布2的第三侧边C和第四侧边D垂直。
当第一拉紧件3的第一端3A固定不动时，随着第一拉紧件3的第二端3B的移动，第一拉紧件3会发生倾斜，第一拉紧件3会伸长或缩短。在此情况下，为了实现投影屏幕100的外翻折，第一拉紧件3的长度可调，且第一拉紧件3能够在平行于幕布2所在的平面内旋转。第一拉紧件3可以为拉紧弹簧或其他弹性拉紧件。
当第一拉紧件3的第一端3A与幕布2同步移动时，第一拉紧件3处于倾斜状态，以便于在幕布2的带动下使第一拉紧件3的第一端3A具有沿移动方向的分作用力。在此情况下，为了实现投影屏幕100的外翻折，第一拉紧件3的第一端3A能够沿第一侧边A的长度方向移动，且第一拉紧件3的长度可调。或者，也可以是第一拉紧件3的第二端3B能够沿第一侧边A的长度方向移动。
在一些实施例中，如图11所示，框架1还包括滑轨11，滑轨11设置于框架1的远离幕布2的一侧，且沿第一侧边A的长度方向延伸，第一拉紧件3包括第一滑槽31，第一滑槽31设置于第一拉紧件3的第一端3A，且套在滑轨11上。这样，通过滑轨11即可对第一拉紧件3的第一端3A进行限制，实现了第一拉紧件3对幕布2的限制。并且，第一拉紧件3的第一端3A能够基于第一滑槽31沿滑轨11滑动，保证了第一拉紧件3能够随幕布2移动。
示例地，滑轨11的横截面为圆形，第一滑槽31的横截面为多半圆形。滑轨11的横截面和第一滑槽31的横截面也可以为其他形状。
第一拉紧件3的第一端3A基于第一滑槽31沿滑轨11滑动时，为了减小第一拉紧件3的第一端3A与滑轨11之间的摩擦力，以便于第一拉紧件3与幕布2的同步移动，如图11所示，滚珠9还设置于滑轨11与第一滑槽31的接触面之间。这样，即可通过滚珠9减小滑轨11与第一滑槽31之间的接触面积，并且能够将滑轨11与第一滑槽31之间的滑动摩擦转换为滚动摩擦，以减小第一拉紧件3的第一端3A与滑轨11之间的摩擦力。
示例地，滚珠9镶嵌在第一滑槽31的内壁，或者镶嵌在滑轨11上。将滚珠9镶嵌在第一滑槽31的内壁，可以在第一拉紧件3的第一端3A相对滑轨11滑动时，避免滑轨11上的滚珠9与第一拉紧件3的第一端3A发生碰撞，从而避免阻碍第一拉紧件3的第一端3A的移动。
在一些实施例中，第一滑槽31设置在框架1的背面，将第一拉紧件3的第一端3A限制在第一滑槽31内。示例地，框架1还包括第一凸起12，第一凸起12设置于框架1的远离幕布2的一侧，且沿第一侧边A的长度方向延伸，第一凸起12包括第一滑槽31，第一拉紧件3的第一端3A限制在第一滑槽31内。
在另一些实施例中，如图12所示，第一凸起12没有包括第一滑槽31，而是包括条状的第一通孔121。第一拉紧件3穿过第一通孔121，第一拉紧件3的第一端3A限制在第一凸起12的一侧。这样，通过第一凸起12对第一拉紧件3的第一端3A进行限制，可以实现第一拉紧件3对幕布2的限制，且第一拉紧件3的第一端3A能够沿第一通孔121的长度方向(即第一侧边A的长度方向)滑动，从而可以保证第一拉紧件3随幕布2移动。示例地，第一凸起12与第一拉紧件3的第一端3A抵接，以实现对第一拉紧件3的第一端3A的限制。
在第一拉紧件3的第一端3A相对第一凸起12滑动时，为了减小第一拉紧件3的第一端3A与第一凸起12之间的摩擦力，从而便于第一拉紧件3的移动，滚珠9还设置于第一凸起12与第一拉紧件3的接触面之间。这样，可减小第一拉紧件3与第一凸起12之间的摩擦力。
示例地，如图12所示，第一拉紧件3还包括拉紧本体32和滑块33，拉紧本体32包括第一端32A和第二端32B。拉紧本体32的第一端32A与幕布2连接，拉紧本体32的第二端32B与滑块33连接，滑块33设置在第一通孔121中，且可在第一通孔121中滑动。如图11至图14所示，拉紧本体32为拉紧弹簧；或者拉紧本体32也可以为其他弹性拉紧件或非弹性拉紧件。如图11所示，当在框架1的背面设置滑轨11、且滑块33包括第一滑槽31时，滑块33套在滑轨11上且可沿滑轨11滑动；当在框架1的背面设置第一凸起12、且第一凸起12包括第一滑槽31时，滑块33限制在第一滑槽31内且可在第一滑槽31内滑动；如图12至图14所示，当框架1的背面设置第一凸起12、第一凸起12包括条状的第一通孔121时，滑块33的横截面呈T形，滑块33的一端穿过第一通孔121，且与拉紧本体32固定连接，滑块33的另一端限制在第一凸起12的一侧。
在又一些实施例中，如图13所示，投影屏幕100还包括第一磁性件7，第一磁性件7固定在第一凸起12上，且位于第一拉紧件3的第一端3A与第一凸起12之间，第一磁性件7与第一拉紧件3的第一端3A之间形成有互斥力。第一磁性件7的长度大致等于第一通孔121的长度，以保证第一拉紧件3的第一端3A移动至任一位置时，均会与第一磁性件7之间形成互斥力。第一拉紧件3的第一端3A朝向第一磁性件7的一面设置有磁性涂层，磁性涂层的磁性与第一磁性件7靠近磁性涂层的表面的磁性相同。
在又一些实施例中，如图14所示，第一凸起12包括第一子凸起122和第二子凸起123，第一子凸起122和第二子凸起123为板状，第一子凸起122远离幕布2的的一端与第二子凸起123连接，且第一子凸起122和第二子凸起123之间具有夹角，这样第一凸起12不仅能够对第一拉紧件3的第一端3A进行限制，还能够避免第一拉紧件3的旋转。在另一些实施例中，第一拉紧件3的第一端3A在沿第一通孔121的长度方向具有一定的宽度，从而可以通过第一通孔121避免第一拉紧件3发生旋转。
第二拉紧件4的长度可调。在一些实施例中，第二拉紧件4为弹性拉紧件。示例地，如图10或图15所示，第二拉紧件4为拉紧弹簧。当投影屏幕100进行外翻折时，幕布2的第三侧边C、第四侧边D分别拉紧连接的两个或更多个第二拉紧件4，使得两个或更多个第二拉紧件4伸长；当投影屏幕100展开时，幕布2倾向于在弯折处形成鼓包，此时幕布2的第三侧边C、第四侧边D可以在两个或更多个第二拉紧件4的弹性力的作用下恢复至初始位置，以使幕布2的鼓包处恢复平整，进而保证幕布2的平整度。初始位置是指使用投影屏幕100时幕布2所处的位置。
在另一些实施例中，框架1的背面具有第二凸起，第二凸起具有第二通孔，投影屏幕还包括第二磁性件；第二拉紧件4的第一端4A与幕布2固定连接，第二拉紧件4的第二端4B穿过第二通孔；第二磁性件与第二凸起固定连接，且位于第二凸起与第二拉紧件4的第二端4B之间，第二磁性件与第二拉紧件4的第二端4B之间形成有互斥力。
第二拉紧件4、第二凸起、第二通孔、第二磁性件的结构分别与上述描述的第一拉紧件3、第一凸起12、第一通孔121、第一磁性件7的结构相似，在此不再赘述。在此基础上，参考图13和14，可以在第一拉紧件3的作用的基础上，获得第二拉紧件4的作用。例如，当投影屏幕外翻折时，幕布2拉紧第二拉紧件4，此时幕布2作用在第二拉紧件4的第二端4B的作用力克服与第二磁性件之间的互斥力，并朝向第二磁性件移动，使得第二拉紧件4的第二端与第二磁性件之间的距离缩小，此时第二拉紧件4伸长；当投影屏幕展开时，幕布2会在弯折处形成鼓包，此时幕布2作用在第二拉紧件4的第二端4B的作用力减小，第二拉紧件4的第二端4B在与第二磁性件之间的互斥力的作用下远离第二磁性件，第二拉紧件4的长度缩短，幕布2恢复至初始位置，以使幕布2的鼓包处恢复平整，进而保证幕布2的平整度。
在本公开一些实施例中，在搬运尺寸较大的投影屏幕100时，能够基于框架1的可折叠性对投影屏幕100进行折叠，以缩小投影屏幕100的搬运尺寸，从而方便搬运；而在使用投影屏幕100时只需要展开框架1，即可通过幕布2接收光学引擎200出射的光束以实现画面 的显示，从而提高了投影屏幕100的组装效率。另外，投影屏幕100进行外翻折时，能够基于框架1的厚度避免幕布2在弯折处出现记忆折痕，从而避免降低投影屏幕的显示效果。
在另一些实施例中，如图16、图17所示，框架1包括第一边框17，折叠机构10包括第二边框16。投影屏幕100中的第二边框16的端部与第一边框17的端部可拆卸连接，且第二边框16与第一边框17能够围成矩形框架。
在一些实施例中，投影屏幕100中的第二边框16的个数与第一边框17的个数为两个，且两个第二边框16相对设置，两个第一边框17相对设置，第二边框16的两端分别与两个第一边框17的端部连接，第一边框17的两端分别与两个第二边框16的端部连接，以围成矩形框架。示例地，投影屏幕100中的第二边框16为矩形框架的短边所在方向上的边框，投影屏幕100中的第一边框17为矩形框架的长边所在方向上的边框。
幕布2的四个侧边分别与第二边框16和第一边框17固定连接。示例地，幕布2的四个侧边与第二边框16和第一边框17通过粘接的方式进行固定连接，或通过其他的方式进行固定连接。第二边框16能够在垂直于幕布2的方向上进行形变，以使形变后的第二边框16能够与幕布2同时发生卷曲。
示例地，在将第二边框16的端部从第一边框17的端部拆卸下来后，可以对第二边框16施加沿垂直于柔性幕布2的方向的作用力，使得第二边框16可以在垂直于幕布2的方向上发生形变。这样，可以在垂直于第二边框16的长度方向上卷曲幕布2。请参考图18，卷曲后的投影屏幕100的整体尺寸较小，进而能够简化投影屏幕100的搬运难度。
在第二边框16的端部与第一边框17的端部连接形成矩形框架后，由于连接第一边框17和第二边框16的第二拉紧件4的阻碍(见图23)，第二边框16即使受到了沿垂直于幕布2的方向的作用力，或者，沿其他方向的作用力，该第二边框16仍然不易发生形变。如此，由第二边框16和第一边框17组成的矩形框架，能够对幕布2进行有效的支撑，保证幕布2上能够呈现出投影画面。
在一些实施例中，如图19所示，第二边框16包括第一部分161和第二部分162。第一部分161和第二部分162包括弯曲部S以及位于弯曲部S两侧的平面部P。第一部分161的平面部P和第二部分162的平面部P连接，第一部分161的弯曲部S和第二部分162的弯曲部S组成空腔a1。示例地，采用压力机将第一部分161的平面部P和第二部分162的平面部P进行压接处理，使得第一部分161的平面部P和第二部分162的平面部P连接在一起。
示例地，第二边框16的第一部分101的弯曲部S包括平面T，平面T与幕布2的第三侧边C和第四侧边D连接。这样，可以有效防止幕布2中与第二边框16连接的区域出现鼓包的现象，且通过该平面T可以提高幕布2与第一部分161之间的连接面积，保证第二边框16与幕布2之间较高的连接牢固性。
在一些实施例中，如图20和图21所示，第二边框16具有半刚性。即第二边框16在与幕布2平行的方向(即X轴方向和Y轴方向)上是刚性的，在受到与幕布2平行的方向上的作用力时第二边框16不易发生变形，因此，通过第二边框16能够对幕布2进行有效的支撑。而在垂直于幕布2的方向上第二边框16是非刚性的，其具有弹性。如此，在将第二拉紧件4和第一拉紧件3从第二边框16的空腔a1中拆卸下来后，第二边框16中的第一部分161的弯曲部S在受到垂直于幕布2的方向上的作用力时可以发生形变，以与第二部分162的弯曲部S贴接。在此情况下，第二边框16在垂直于幕布2的方向上的厚度较小，由此，在以两个第一边框17中的一个为卷曲轴卷曲幕布2时，可以进一步地降低幕布2卷曲后的体积。
在一些实施例中，在对变形后的第一部分161施加反作用力后，即可让第一部分161恢复为未变形前的状态，使得第一部分161与第二部分162之间能够围成空腔a1。示例地，第一部分161和第二部分162为弹性片，第一部分161与第二部分162在变形后能够卷曲、未变形前能够起到支撑作用。
在一些实施例中，如图23至图24所示，第二拉紧件4用于连接第二边框16的端部和第一边框17的端部。如此，第二边框16的端部通过第二拉紧件4与第一边框17的端部可实现可拆卸连接。第二拉紧件4被配置为通过第二边框16带动幕布2在第一边框17的长度方向(即第一侧边A的长度方向)上移动，以调整幕布2在第一边框17的长度方向上的拉紧度。
示例地，在投影屏幕100重新展开时，先通过第二拉紧件4连接第二边框16的端部与第一边框17的端部，再通过第二拉紧件4调整幕布2在第一边框17的长度方向上的拉紧度。在调节幕布2在第一边框17的长度方向上的拉紧度的过程中，第二拉紧件4带动第二边框16沿平行于第一边框17的长度方向、向远离幕布2中心的方向移动，进而第二边框16带动幕布2张紧。如此，可以在第一边框17的长度方向上将幕布2拉展，进而可以保证幕布2的平坦度较好。
在一些实施例中，参考图23和图24，第一边框17包括第二滑槽171，以及与第二滑槽171连通的第三通孔172，第二滑槽171与第三通孔172设置于第一边框17的端部。第二滑槽171的长度方向、第三通孔172的贯穿方向均与第一边框17的长度方向平行。
在一些实施例中，第二拉紧件4包括第一连接件401、第三凸起402和调节杆403。第一连接件401位于空腔a1内，且第一连接件401与第二边框16的端部固定连接。示例地，如图24所示，第一连接件401与第二边框16的端部通过螺钉f1连接，也可以通过其他方式进行固定连接。第三凸起402位于第二滑槽171内，且第三凸起402和第一连接件401固定连接。调节杆403穿过第三通孔172且与第三凸起402活动连接，第三凸起402能够在调节杆403的长度方向上移动。
在一些实施例中，如图23所示，第一边框17包括凸台b1，凸台b1位于第三通孔172内，调节杆403远离第三凸起402的一端与凸台b1抵接。这样，在采用第二拉紧件4将幕布2张紧后，能够防止幕布2在自身弹力的作用下带动第二拉紧件4沿平行于第一边框17的长度方向、向靠近幕布2中心的方向移动。
示例地，第二滑槽171的长度方向和第三通孔172的贯穿方向均与第一边框17的长度方向平行，且第一连接件401与第二边框16的端部连接。第三凸起402位于第二滑槽171内，且第三凸起402与第一连接件401固定连接，调节杆403穿过通孔202与第三凸起402活动连接，第三凸起402能够在调节杆403的长度方向上移动。这样，在通过第二拉紧件4调节幕布2在第一边框17的长度方向上的拉紧度的过程中，调节杆403能够带动第一连接件401向远离幕布2中心的方向移动，进而第一连接件401能够带动第二边框16向远离幕布2中心的方向移动，第二边框16即可以带动幕布2使其处于张紧状态；或者，调节杆403能够带动第一连接件401向靠近幕布2中心的方向移动，进而第一连接件401能够带动第二边框16向靠近幕布2中心的方向移动，第二边框16即可以带动幕布2使其处于松弛状态。如此，可以实现第二拉紧件4对幕布2在平行于第一边框17的长度方向上的拉紧度的调整。
示例地，第三凸起402具有螺纹孔，调节杆403为螺杆，第三凸起402中的螺纹孔具有内螺纹，调节杆403具有与螺纹孔的内螺纹相匹配的外螺纹。当螺杆绕自身轴线进行不同方向的旋转时，调节杆403的外螺纹与螺纹孔内的内螺纹啮合。第三凸起402带动第一连接件401向远离幕布2中心的方向移动，进而第一连接件401能够带动第二边框16背向幕布2移动；或者，第三凸起402带动第一连接件401向靠近幕布2中心的方向移动，进而第一连接件401能够带动第二边框16向靠近幕布2中心的方向移动。这样，可以实现第二拉紧件4对幕布2在第一边框17的长度方向上的拉紧度的调整。
在一些实施例中，请参考图22，第二边框16包括第一子边框100a和第二子边框100b。第一子边框100a包括第一端100a1和第二端100a2；第二子边框100b包括第一端100b1和第二端100b2。第一连接件401固定在第一子边框100a的第一端100a1和第二子边框100b的第一端100b1。示例地，如图24所示，第一连接件401与第一子边框100a的第一端100a1以及第二子边框100b的第一端100b1通过螺钉f1固定连接。
在一些实施例中，如图22和图25所示，第一拉紧件3分别与第一子边框100a第二端100a2和第二子边框100b的第二端100b2连接。第一拉紧件3被配置为调整幕布2在第二边框16的长度方向上的拉紧度，使幕布2在第二边框16的长度方向上处于张紧状态或松弛状态。
示例地，第一拉紧件3包括两个第二连接件301和弹性元件302。弹性元件302位于两个第二连接件301之间，两个第二连接件301位于空腔a1内，且分别固定在第一子边框100a的第二端100a2和第二子边框100b的第二端100b2。示例地，两个第二连接件301分别与第 一子边框100a的第二端100a2和第二子边框100b的第二端100b2通过螺钉固定连接。
示例地，在投影屏幕100展开时，在通过第一拉紧件3调节幕布2在第二边框16的长度方向上的拉紧度的过程中，将幕布2与第二边框16固定连接，第一拉紧件3中的两个第二连接件301分别与第二边框16中的第一子边框100a的第二端100a2和第二子边框100b的第二端100b2固定连接，弹性元件302对第二边框16产生指向第一边框17的作用力，两个第二连接件301带动第二边框16中的第一子边框100a和第二子边框100b在平行于第二边框16的长度方向上发生相对移动，进而第二边框16带动幕布2张紧。如此，可以在平行于第二边框16的长度方向上将幕布2拉展，进而可以保证幕布2的平坦度较好。
在一些实施例中，如图25所示，两个第二连接件301中的一个包括第四凸起3011，另一个包括与第四凸起3011的形状匹配的凹槽3012以及环状凹槽3013，且第四凸起3011中的至少部分位于凹槽3012内。凹槽3012与环状凹槽3013同轴设置。两个第二连接件301之间的弹性元件302为压缩弹簧，压缩弹簧套接在第四凸起3011上，在第四凸起3011与凹槽3012组装配合后，压缩弹簧的两端分别与两个第二连接件301抵接，且压缩弹簧中的一部分位于环状凹槽3013中。这样，压缩弹簧只能够在平行于第二边框16的方向上移动，在垂直于第二边框16的方向上不易发生晃动，从而能够使得第一子边框100a和第二子边框100b的连接稳定性较好。弹性元件302还可以为弹片，本公开对弹性元件302的结构形式不做限定。
示例地，第一连接件401的形状、第二连接件301的形状与空腔a1的形状匹配，即第一连接件401的横截面的形状、第二连接件301的横截面的形状与空腔a1的横截面的形状相同。这样，第一连接件401和第二连接件301可填充在空腔a1内，使得在第二边框16的端部与第一边框17的端部连接后，第二边框16在垂直于幕布2的方向上的刚性增强，保证第二边框16能够对幕布2进行有效的支撑。投影屏幕100还包括密封元件，密封元件设置于第一连接件401和第二连接件301的侧壁上，以进一步提高对于空腔a1的密封性。
在一些实施例中，请参考图26，两个第二边框16分别与幕布2的第三侧边C和第四侧边D连接。折叠机构10还包括位于两个第二边框16之间的第三边框18，第三边框18的端部与第一边框17可拆卸连接，且第三边框18与幕布2固定连接(例如粘接)。这样，第三边框18和两个第二边框16对幕布2的支撑稳定性较好。
在一些实施例中，第三边框18包括第一部分161和第二部分162，第三边框18的结构可以参考上述第二边框16。请参考图26和图27，框架1还包括支撑件19。支撑件19包括第三连接件191和第五凸起192。第三连接件191和第五凸起192固定连接，且第三连接件191与第三边框18的端部固定连接。第五凸起192包括螺纹孔c1，且螺纹孔c1的长度方向与第一边框17的长度方向垂直。第一边框17包括开孔d1，螺钉f1穿过开孔d1与螺纹孔c1连接。如此，可以实现第三边框18的端部与第一边框17可拆卸连接。
示例地，如图28所示，第一边框17包括底板173和两个挂板174。刚底板173的端部通过第二拉紧件4与第二边框16的端部连接。两个挂板174分别与底板173的两侧固定连接。框架1还包括悬挂部20。悬挂部20包括卡钩201，卡钩201用于与两个挂板174中的至少一个卡接。这样，在悬挂部20固定在墙壁上后，可以通过卡钩201与至少一个挂板174卡接，以将投影屏幕100悬挂在墙壁上。这里，悬挂部20可以通过螺钉f1固定在墙壁上。
在又一些实施例中，如图29所示，第二边框16包括第三部分163，第三部分163包括通槽1631。示例地，第三部分163为弹性片，例如第三部分163为金属弹性片。在采用第三部分163作为第二边框16时，将第二拉紧件4和第一拉紧件3设置通槽1631中，且与第三部分163固定连接。在将第二拉紧件4和第一拉紧件3从通槽1631中拆卸下来后，第三部分163在受到垂直于幕布2的方向上的作用力时，可以使第三部分163在垂直于幕布2的方向上发生形变。如此，可以在垂直于第二边框16的长度方向上卷曲幕布2，使得卷曲后的投影屏幕100的整体尺寸较小，进而能够简化投影屏幕100的搬运难度。而在第二边框16的端部与第一边框17的端部连接后，第二边框16不易发生变形，能够对幕布2进行有效的支撑。
在一些实施例中，光学膜片21固定在柔性载体22的一侧，柔性载体22的边缘伸出光学膜片21的边缘，柔性载体22的另一侧贴合在框架1的正面，且柔性载体22伸出光学膜片21的部分翻折至框架1的背面，柔性载体22的边缘通过第一拉紧件3和第二拉紧件4限位 在框架1的背面。光学膜片21用于接收光学引擎200出射的光束，以实现画面的显示。光学膜片21可以为白塑幕、灰塑幕或菲涅尔光学屏或具有其他结构。
在另一些实施例中，光学膜片21通过粘接的方式固定在柔性载体22上。柔性载体22的远离光学膜片21的一侧贴合在第二边框16上。柔性载体22为柔性布，也可以为其他柔性件，只要能够任意弯折，且张紧后具有一定的平面度即可。并且，柔性载体22在光学膜片21所在平面上的投影覆盖光学膜片21或者覆盖光学膜片21的四条侧边，以保证柔性载体22的边缘伸出光学膜片21的四条侧边，进而能够在拉紧柔性载体22的同时保证光学膜片21的平面度。
以上是对投影屏幕100的框架1的结构的说明，下面对幕布2的结构进行说明。
在投影显示技术领域，尤其是超短焦激光投影显示领域，为达到较好的亮度及显示效果，光学引擎一般搭配具有菲涅尔微结构的投影屏幕使用。
如图30所示，具有菲涅尔微结构的投影屏幕一般包括层叠设置的表面层211’、着色层216’、扩散层214’、菲涅尔透镜层212’以及反射层213’。表面层211’用于保护投影屏幕。着色层216’用于提高投影屏幕的对比度。扩散层214’内分布有扩散粒子215’，扩散粒子215’用于使进入该投影屏幕内的光线沿不同方向扩散。反射层213’用于反射进入该投影屏幕内的光线，使光线重新从表面层211’射出。光学引擎200投射的光线在到达表面层211’时，光线在表面层211’发生折射，进入投影屏幕内部，最终再从表面层211’射出至观众300，观众300便能够在投影屏幕上观看到影像。但是，光学引擎200投射的光线中的一部分会在表面层211’发生反射，反射后的这部分光线会在别处(如天花板109)形成较为清晰的影像，从而影响到观众300的观看体验。
对此，在一些实施例中，如图31所示，光学膜片21包括层叠设置表面层211、菲涅尔透镜层212以及反射层213。表面层211包括多个蛾眼结构211A，多个蛾眼结构211A设置于表面层211远离菲涅尔透镜层212一侧的表面上。由于蛾眼结构211A能够起到增加透射率，减小反射率的作用，当光线到达表面层211远离菲涅尔透镜层212一侧的表面时，会有更多的光线透过表面层211，由此，该表面的反射率较低，从而光学引擎200投射的大部分光线(约95％的入射光线2A)会透过表面层211，最终反射至观众300，只有不足5％的光线发生反射，因而不易在其它的地方形成影像，提升了观众300的观看体验。此外，由于有更多的光线经过菲涅尔透镜层212以及反射层213后到达观众300的眼中，使得光学引擎200投射的光线的利用率更高，投影屏幕100的增益更高。
在一些实施例中，如图32和图33，多个蛾眼结构211A均匀设置于表面层211远离菲涅尔透镜层212一侧的表面上，由此，表面层211远离菲涅尔透镜层12一侧的整个表面上的各个位置都具有较低的反射率。光学引擎200投射的光线到达该表面上的任意位置后，都能有较多的光线透过该表面，这些光线经过菲涅尔透镜层212以及反射层213之后，反射到观众300的眼中。通过均匀分布蛾眼结构211A可以尽可能的提升光学引擎200投射的光线的利用率，提高投影屏幕100的增益。或者，多个蛾眼结构211A也可以随机排布于表面层211远离菲涅尔透镜层212一侧的表面上，也能够起到较好地降低该表面反射率的效果。
在一些实施例中，如图32所示，多个蛾眼结构211A间隔设置于表面层211远离菲涅尔透镜层一侧的表面上。由此，使得表面层211的表面上的蛾眼结构211A的分布更加分散，制作更加方便。示例地，相邻两个蛾眼结构211A之间具有固定的间隔，例如，间隔为50nm、100nm或者150nm。或者，相邻两个蛾眼结构211A之间的间隔以预设规律变化，例如在50nm～150nm的范围内逐渐增大或减小。由此，可以具有较好的降低反射率的效果。
示例地，如图32所示，多个蛾眼结构211A沿表面层211的长度方向X以及宽度方向Y间隔排列。即多个蛾眼结构211A沿表面层211的宽度方向Y排成多行，每行沿表面层211的长度方向X设有多个蛾眼结构211A。沿长度方向X，相邻的两个蛾眼结构211A之间的间隔为50nm，沿宽度方向Y，相邻的两个蛾眼结构211A之间的间隔为150nm。或者，沿长度方向X的相邻的两个蛾眼结构211A之间的间距，与沿宽度方向Y的相邻的两个蛾眼结构211A之间的间距均为100nm，从而使得蛾眼结构211A的分布更加分散，制作更加方便。
在另一些实施例中，如图33所示，相邻的两个蛾眼结构211A相互接触。这样，表面层 211的表面上的蛾眼结构211A较为密集，可以保证该表面具有较低的反射率，保证光学引擎200投射的光线能够较多的透过该表面。
在一些实施例中，蛾眼结构211A的形状包括圆柱状、圆锥状、棱锥状和抛物面状中的至少一种。上述几种不同形状的蛾眼结构211A都具有良好的减小反射率的效果，可以保证光学引擎200投射的大部分光线从表面层211远离菲涅尔透镜层212一侧的表面透过，进入到光学膜片21的内部，最终反射到观众300眼中。
表面层211远离菲涅尔透镜层212一侧的表面上可以设置多种形状的蛾眼结构211A。例如，该表面上可以同时设置圆柱状和圆锥状的蛾眼结构211A。或者，该表面上也可以设置单一形状的蛾眼结构211A。示例地，如图31所示，蛾眼结构211A的形状为圆柱形。由于圆柱形的形状结构更加简单，制作圆柱形的蛾眼结构211A更加容易。
在一些实施例中，当蛾眼结构211A的形状为圆柱状时，蛾眼结构211A的直径为30nm～60nm，由此，能够较大幅度的降低表面层211远离菲涅尔透镜层212一侧表面的反射率，使得光线不易在该表面发生反射，从而使得光学引擎200投射的光线不易在别处形成影像。此外，蛾眼结构211A的直径也可以为其它取值，小到十几纳米，大到几微米，都能够达到降低反射率的效果，具体数值可根据实际情况进行选择。示例地，蛾眼结构211A的直径为30nm、45nm、50nm或者60nm，均可以达到较好的降低反射率的效果。此外，表面层211远离菲涅尔透镜层212一侧的表面上可以同时设置不同直径大小的蛾眼结构211A。例如，该表面可以同时存在直径为30nm、45nm以及60nm的蛾眼结构211A，由此，可以达到较好的降低反射率的效果。
在一些实施例中，圆柱形的蛾眼结构211A的高度为250nm～350nm，例如，蛾眼结构211A的高度为250nm、300nm或者350nm。由此，对于降低表面层211远离菲涅尔透镜层212一侧的表面的反射率的效果较好。
在一些实施例中，多个蛾眼结构211A的高度不同，即表面层211远离菲涅尔透镜层212一侧的表面设有高度不同的蛾眼结构211A。例如，该表面同时存在高度为250nm、300nm和350nm的蛾眼结构211A。由蛾眼结构211A减小反射率的原理可知，光线在到达表面层211时，无法辨认出该蛾眼结构211A，可等效认为该表面折射率沿厚度方向呈连续变化，进而可以减小折射率急剧变化带来的反射效应(两种介质折射率相差越大，反射率越大)，从而达到降低该表面反射率的效果。通过设置高度不同的蛾眼结构211A，使得这种等效折射率变化地更加连续、平滑，从而可以更加有效的降低反射率。
在一些实施例中，参阅图31，光学膜片21还包括扩散层214和扩散粒子215，扩散层214设置于表面层211和菲涅尔透镜层212之间，扩散粒子215分布于扩散层214内。进入光学膜片21内的光线先经过扩散层214，在扩散粒子215的作用下沿各个方向扩散，使得投影屏幕100的观看视角有所增大。同时，扩散后的光线之间的相干性较弱，降低了光线在投影屏幕100表面的干涉程度，进而减弱投影屏幕100表面出现的散斑的严重程度。扩散粒子215的材质为聚甲基丙烯酸甲酯(Polymethyl Methacrylate，PMMA)。
扩散层214可以由柔性材料制成，例如，扩散层214可以由聚对苯二甲酸乙二醇酯(Polyethylene Terephthalate,PET)材料制成。PET材料具有柔性，进而使得扩散层214具有柔性，能够卷曲。扩散层214也可以由其它柔性材料制成，例如，扩散层214可以由热塑性聚氨酯弹性体橡胶(Thermoplastic Polyurethanes，TPU)材料制成，TPU具有弹性，可实现卷曲。或者，扩散层214还可以由苯乙烯系嵌段共聚物(Styrenic Block Copolymers，SBC)柔性材料制成。
在一些实施例中，继续参阅图31，光学膜片21还包括着色层216，着色层216设置于表面层211和扩散层214之间，着色层216内设置有暗色染料，暗色染料可以吸收外界的环境光，进而增加投影屏幕100的对比度。暗色染料一般为有机染料，可以选用偶氮类染料、酞菁类染料等染料。着色层216可以由甲基丙烯酸甲酯-苯乙烯共聚物(Methyl Methacrylate-styrene Copolymer，MS)材料或者PET材料制成，当着色层216由PET材料制成时，着色层216具有柔性，可进行卷曲。
在一些实施例中，如图31所示，光学膜片21还包括基材层217，基材层217位于表面 层211和菲涅尔透镜层212之间，基材层217可作为光学膜片21的支撑基础。基材层217的数量可以为多个，以基材层217的数量为两个为例，其中一个基材层217位于表面层211和着色层216之间，另一个基材层217位于扩散层214和菲涅尔透镜层212之间。靠近表面层211的一个基材层217可作为制作表面层211的基底，靠近菲涅尔透镜层212的一个基材层217可作为制作菲涅尔透镜层212的基底。
基材层217的材料可以为柔性材料。例如，基材层217由PET材料、TPU材料或者SBC材料制成，上述材料具有柔性，使得基材层具有柔性，从而可以实现该光学膜片21的卷曲。或者，基材层217可以由聚氯乙烯、聚丙烯或者聚乙烯材料制成。聚氯乙烯具有尺寸稳定性好、耐候性好以及成本低的优点，并且可以利用增塑剂调整软硬度。尺寸稳定性，是指材料在受机械力、热或其他外界条件作用下，其外形尺寸不发生变化的性能。耐候性是指材料应用于室外经受气候(如光照、冷热、风雨、细菌)的考验，对其造成的综合破坏的耐受能力。聚丙烯具有易染色、质地轻、韧性好、耐高温和耐化学性好等优点。聚乙烯具有优良的耐低温性能以及化学稳定好的优点，能耐大多数酸碱的侵蚀。
在一些实施例中，反射层213的反射材料为铝。在另一些实施例中，反射层213的反射材料为银，或银和铝的组合物。
以反射材料选择铝为例，如图34所示，为了提高投影屏幕100的增益，可以选择粉末状铝粉，因为粉末状铝粉更为细腻，则由铝粉反射的光线的方向性不明显，光学引擎200发出的光线大多能够根据菲涅尔透镜层212的微结构的设置而定向反射出该投影屏幕100，不会造成光线的随机反射，所以使得该投影屏幕100的增益较高。
当选用铝颗粒作为反射材料时，铝颗粒的直径范围可以为5um～20um。此范围内的铝颗粒，由于直径较小，在形成反射层213后，铝颗粒会形成致密的反射面，光线照射在该反射面时，能够将光线尽可能的进行反射，从而避免光线能量的浪费。此外，在选用铝颗粒作为反射材料时，可以将反射层213做得很薄，从而可以节省铝材料的消耗，节约制作成本。
示例地，如图35所示，反射层213的反射材料为鳞片状铝粉，鳞片状铝粉为圆形片状结构，鳞片状铝粉的径厚比较大，例如，其径厚比的范围可为(40:1)至(100:1)之间，在此范围内，铝的结合能力较强，不易脱落，径厚比为直径与厚度的比值。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求所述的保护范围为准。

Claims (20)

  1. 一种投影装置，包括：
    投影屏幕，被配置为显示投影画面，所述投影屏幕包括：
    框架，包括左边框、右边框和位于所述左边框和所述右边框之间的折叠机构，所述折叠机构包括铰链，所述铰链包括：
    第一合页，所述第一合页与所述左边框固定连接；
    第二合页，所述第二合页与所述右边框固定连接；和
    铰接轴，所述第一合页和所述第二合页与所述铰接轴相连，且可围绕所述铰接轴旋转；
    幕布，所述幕布与所述框架固定连接；
    光学引擎，被配置为将光束出射至所述投影屏幕。
  2. 根据权利要求1所述的投影装置，其中，所述折叠机构还包括固定梁，所述固定梁可拆卸地固定连接在所述框架上；
    所述固定梁被配置为将所述框架限制在展开状态；
    所述固定梁包括第一端和第二端；在所述框架处于所述展开状态的情况下，所述固定梁的所述第一端与所述左边框相连，所述固定梁的第二端与所述右边框相连。
  3. 根据权利要求2所述的投影装置，其中
    所述左边框包括第一限位槽，所述第一限位槽位于所述左边框远离所述幕布的一侧；
    所述右边框包括第二限位槽，所述第二限位槽位于所述右边框远离所述幕布的一侧；
    在所述框架处于所述展开状态的情况下，所述固定梁的所述第一端设置在所述第一限位槽内，所述固定梁的所述第二端设置在所述第二限位槽内；
    或者，
    所述左边框包括第一滑道，所述第一滑道位于所述左边框远离所述幕布的一侧；
    所述右边框包括第二滑道，所述第二滑道位于所述右边框远离所述幕布的一侧；
    在所述框架处于所述展开状态的情况下，所述固定梁位于所述第一滑道内，且配置为在所述第一滑道内滑动，所述固定梁滑动时伸出所述第一滑道的部分伸入所述第二滑道；或者，所述固定梁位于所述第二滑道内，且配置为在所述第二滑道内滑动，所述固定梁滑动时伸出所述第二滑道的部分伸入所述第一滑道。
  4. 根据权利要求1至3任一项所述的投影装置，其中，所述幕布包括相对的第一侧边、第二侧边和相对的第三侧边、第四侧边；所述第一侧边、所述第二侧边包裹所述框架的边缘并绕到所述框架远离所述幕布的一侧；所述第三侧边、所述第四侧边包裹所述框架的边缘并绕到所述框架远离所述幕布的一侧；
    所述投影屏幕还包括：
    第一拉紧件，所述第一拉紧件设置于所述第一侧边或所述第二侧边，且设置于所述框架远离所述幕布的一侧；
    所述第一拉紧件包括第一端和第二端，所述第一拉紧件的所述第一端与所述框架相连，所述第一拉紧件的所述第二端与所述幕布相连；
    所述第一拉紧件的长度可调，或者所述第一拉紧件的所述第一端能够沿所述第一侧边或所述第二侧边的长度方向移动；
    第二拉紧件，所述第二拉紧件设置于所述第三侧边或所述第四侧边，且设置于所述框架远离所述幕布的一侧；
    所述第二拉紧件包括第一端和第二端，所述第二拉紧件的所述第一端与所述框架相连，所述第二拉紧件的所述第二端与所述幕布相连；
    所述第二拉紧件的长度可调。
  5. 根据权利要求4所述的投影装置，其中，所述框架还包括滑轨，所述滑轨设置于所述框架的远离所述幕布的一侧，且沿所述第一侧边或所述第二侧边的长度方向延伸；
    所述第一拉紧件包括拉紧本体和滑块；所述拉紧本体包括第一端和第二端，所述拉紧本体的所述第一端与所述幕布连接，所述拉紧本体的所述第二端与所述滑块连接；所述滑块包 括第一滑槽，所述第一滑槽位于所述第一拉紧件的所述第一端，所述第一滑槽套在所述滑轨上。
  6. 如权利要求4所述的投影装置，其中，所述框架还包括第一凸起，所述第一凸起设置于所述框架的远离所述幕布的一侧，且沿所述第一侧边或所述第二侧边的长度方向延伸；
    所述第一凸起包括条状的第一通孔，所述第一拉紧件穿过所述第一通孔，以使所述第一拉紧件的所述第一端限制在所述第一凸起远离所述第一拉紧件的所述第二端的一侧。
  7. 如权利要求6所述的投影装置，其中，所述投影屏幕还包括第一磁性件；
    所述第一磁性件设置在所述第一凸起上，且位于所述第一拉紧件的所述第一端与所述第一凸起之间，所述第一磁性件与所述第一拉紧件的所述第一端之间形成有互斥力。
  8. 如权利要求3至7任一项所述的投影装置，其中，所述幕布包括：
    光学膜片；
    柔性载体，所述光学膜片设置于所述柔性载体的一侧；
    贴片，所述贴片设置于所述柔性载体远离光学膜片的一侧，所述第三侧边、所述第四侧边包裹所述框架的边缘并绕到所述框架远离所述幕布的一侧后，所述贴片包裹所述框架的边缘。
  9. 如权利要求8所述的投影装置，其中，所述投影屏幕还包括滚珠，所述滚珠设置于所述贴片与所述框架的边缘之间。
  10. 根据权利要求1至9任一项所述的投影装置，其中，所述幕布包括光学膜片和柔性载体；
    所述光学膜片包括层叠设置的表面层、菲涅尔透镜层以及反射层；所述表面层远离所述菲涅尔透镜层一侧的表面上设有多个蛾眼结构。
  11. 根据权利要求10所述的投影装置，其中，所述多个蛾眼结构均匀分布于所述表面层远离所述菲涅尔透镜层一侧的表面上。
  12. 一种投影装置，包括：
    投影屏幕，被配置为显示投影画面，所述投影屏幕包括：
    框架，所述框架包括两个相对设置的第一边框和折叠机构；所述折叠机构包括两个相对设置的第二边框；
    幕布，所述幕布具有相对的第一侧边、第二侧边和相对的第三侧边、第四侧边；所述第一侧边和所述第二侧边分别与所述两个第一边框固定连接，所述第三侧边和所述第四侧边分别与所述第二边框固定连接；
    光学引擎，被配置为将光束出射至所述投影屏幕；其中，
    所述两个第二边框的各自的两端分别与所述两个第一边框的各自的两端可拆卸地连接，且所述两个第二边框与所述两个第一边框围成框架；
    所述两个第二边框被配置为能够发生卷曲，以使所述两个第二边框能够带动所述幕布卷曲。
  13. 根据权利要求12所述的投影装置，其中，所述第二边框包括第一部分和第二部分，所述第一部分和所述第二部分分别包括弯曲部以及位于所述弯曲部两侧的平面部；
    所述第一部分的所述平面部和所述第二部分的所述平面部相连，且所述第一部分的所述弯曲部和所述第二部分的所述弯曲部组成空腔；所述第一部分的所述弯曲部被配置为在受到垂直于所述幕布的方向的作用力时与所述第二部分的所述弯曲部贴接。
  14. 根据权利要求13所述的投影装置，其中，所述投影屏幕还包括第二拉紧件，所述第二拉紧件连接所述第二边框的端部与所述第一边框的端部，所述第二拉紧件被配置为通过所述第二边框带动所述幕布沿平行于所述第一边框的长度方向的方向移动，以调整所述幕布在所述第一边框的长度方向上的拉紧度。
  15. 根据权利要求14所述的投影装置，其中，所述第一边框包括：
    第二滑槽，所述第二滑槽的位于所述第一边框的所述端部；
    第三通孔，所述第三通孔与所述第二滑槽连通；
    所述第二拉紧件包括：
    第一连接件，所述第一连接件设置于所述空腔内，且固定在所述第二边框的所述端部；
    第三凸起，所述第三凸起位于所述第二滑槽内，且与所述第一连接件固定连接；所述第三凸起包括螺纹孔，所述螺纹孔包括内螺纹；
    调节杆，所述调节杆穿过所述第三通孔且与所述第三凸起活动连接；所述调节杆为螺杆，所述调节杆包括与所述螺纹孔的所述内螺纹相匹配的外螺纹；所述调节杆通过所述螺纹孔与所述第三凸起的所述内螺纹连接；所述第三凸起被配置为能够在所述调节杆的长度方向上移动。
  16. 根据权利要求12至15任一项所述的投影装置，其中，所述第二边框包括第一子边框和第二子边框，所述第一子边框与所述第二子边框分别包括第一端和第二端，所述第一连接件固定在所述第一子边框的所述第一端或所述第二子边框的所述第一端；
    所述投影屏幕还包括第一拉紧件，所述第一拉紧件分别与所述第一子边框的所述第二端和第二子边框的所述第二端连接；所述第一拉紧件被配置为调整所述幕布在所述第二边框的长度方向上的拉紧度。
  17. 根据权利要求16所述的投影装置，其中，所述第一拉紧件包括：
    两个第二连接件，所述两个第二连接件位于所述空腔内，且分别固定在所述第一子边框的所述第二端和第二子边框的所述第二端；所述两个第二连接件中的一个包括第四凸起，所述两个第二连接件中的另一个包括与所述第四凸起的形状匹配的凹槽，所述第四凸起中的至少部分位于所述凹槽内；
    弹性元件，所述弹性元件套接在所述第四凸起上，且所述弹性元件的两端分别与所述两个第二连接件抵接。
  18. 根据权利要求12至17任一项所述的投影装置，其中，所述投影屏幕还包括位于所述两个第二边框之间的第三边框，所述第三边框的两端分别与所述两个第一边框可拆卸连接，且所述第三边框与所述幕布固定连接。
  19. 根据权利要求12所述的投影装置，其中，所述幕布包括光学膜片和柔性载体；
    所述光学膜片包括层叠设置的表面层、菲涅尔透镜层以及反射层；所述表面层远离所述菲涅尔透镜层一侧的表面上设有多个蛾眼结构。
  20. 根据权利要求19所述的投影装置，其中，所述多个蛾眼结构均匀分布于所述表面层远离所述菲涅尔透镜层一侧的表面上。
PCT/CN2022/115260 2021-08-27 2022-08-26 投影装置 WO2023025308A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280052558.7A CN117882005A (zh) 2021-08-27 2022-08-26 投影装置

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN202110994445.6A CN115729025A (zh) 2021-08-27 2021-08-27 投影屏幕
CN202110994445.6 2021-08-27
CN202111188247.7 2021-10-12
CN202111188247.7A CN115963686A (zh) 2021-10-12 2021-10-12 投影屏幕
CN202122963821.3 2021-11-29
CN202122963821.3U CN217425918U (zh) 2021-11-29 2021-11-29 一种投影屏幕及投影装置

Publications (1)

Publication Number Publication Date
WO2023025308A1 true WO2023025308A1 (zh) 2023-03-02

Family

ID=85322485

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/115260 WO2023025308A1 (zh) 2021-08-27 2022-08-26 投影装置

Country Status (2)

Country Link
CN (1) CN117882005A (zh)
WO (1) WO2023025308A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070285337A1 (en) * 2006-06-12 2007-12-13 Alan Maddock Visual display screen apparatus
CN101504509A (zh) * 2008-02-08 2009-08-12 精工爱普生株式会社 便携型屏幕
CN211180523U (zh) * 2019-05-30 2020-08-04 深圳市影博视科技有限公司 一种可折叠投影幕布架
CN212322053U (zh) * 2020-07-21 2021-01-08 清远市星徽精密制造有限公司 一种可调节的折叠式抗光幕布安装机构
CN112666784A (zh) * 2021-01-14 2021-04-16 北京字节跳动网络技术有限公司 投影幕布装置
CN213876293U (zh) * 2020-12-30 2021-08-03 青岛海信激光显示股份有限公司 投影屏幕
CN213876294U (zh) * 2020-12-30 2021-08-03 青岛海信激光显示股份有限公司 投影屏幕

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070285337A1 (en) * 2006-06-12 2007-12-13 Alan Maddock Visual display screen apparatus
CN101504509A (zh) * 2008-02-08 2009-08-12 精工爱普生株式会社 便携型屏幕
CN211180523U (zh) * 2019-05-30 2020-08-04 深圳市影博视科技有限公司 一种可折叠投影幕布架
CN212322053U (zh) * 2020-07-21 2021-01-08 清远市星徽精密制造有限公司 一种可调节的折叠式抗光幕布安装机构
CN213876293U (zh) * 2020-12-30 2021-08-03 青岛海信激光显示股份有限公司 投影屏幕
CN213876294U (zh) * 2020-12-30 2021-08-03 青岛海信激光显示股份有限公司 投影屏幕
CN112666784A (zh) * 2021-01-14 2021-04-16 北京字节跳动网络技术有限公司 投影幕布装置

Also Published As

Publication number Publication date
CN117882005A (zh) 2024-04-12

Similar Documents

Publication Publication Date Title
US7489444B1 (en) Portable front projection screen assemblies with flexible screens
US7706066B2 (en) Portable front projection screen assemblies with flexible screens
US7595930B2 (en) Portable front projection screens
US7057812B2 (en) Reflection-type projection screen
US5456967A (en) Reflection-type screen having a dimensionally stable substrate
CN108983544B (zh) 投影屏幕及投影系统
US7602549B2 (en) Screen and image projection system
US20070285337A1 (en) Visual display screen apparatus
US20110027474A1 (en) Reflecting screen, method of manufacturing the same, and reflection-type projection system
CN109634046B (zh) 一种光学屏幕及其制备方法
US7974005B2 (en) Display screen for use in front projectors
CN108628082B (zh) 一种柔性可卷曲光学投影屏幕
KR20060113919A (ko) 환경광 안에서 작동하는 프로젝션-수신 표면
WO2022247429A1 (zh) 一种消散斑投影屏幕及投影系统
WO2008059345A2 (en) Visual display screen apparatus
WO2023025308A1 (zh) 投影装置
CN113805421B (zh) 一种可卷曲投影屏幕及投影装置
WO2023046079A1 (zh) 投影装置
CN113741133B (zh) 一种可卷曲投影屏幕及投影装置
KR100981352B1 (ko) 원형회복강화 휴대용 디스플레이 스크린
CN219065979U (zh) 硅胶投影屏幕
CN204390677U (zh) 一种户外投影式广告牌
WO2023046183A1 (zh) 投影装置
CN112255877A (zh) 一种反射式侧向投影屏幕及投影系统
WO2023020543A1 (zh) 投影装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22860654

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280052558.7

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE