WO2024255323A1 - 投影屏幕和激光投影系统 - Google Patents

投影屏幕和激光投影系统 Download PDF

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Publication number
WO2024255323A1
WO2024255323A1 PCT/CN2024/079454 CN2024079454W WO2024255323A1 WO 2024255323 A1 WO2024255323 A1 WO 2024255323A1 CN 2024079454 W CN2024079454 W CN 2024079454W WO 2024255323 A1 WO2024255323 A1 WO 2024255323A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
screen
edge
rotating
rotating part
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2024/079454
Other languages
English (en)
French (fr)
Inventor
代琪
陈波
冯宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Laser Display Co Ltd
Original Assignee
Qingdao Hisense Laser Display Co Ltd
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 CN202310721820.9A external-priority patent/CN116719203A/zh
Priority claimed from CN202310723298.8A external-priority patent/CN116719204A/zh
Application filed by Qingdao Hisense Laser Display Co Ltd filed Critical Qingdao Hisense Laser Display Co Ltd
Priority to CN202480016207.XA priority Critical patent/CN120826645A/zh
Publication of WO2024255323A1 publication Critical patent/WO2024255323A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens

Definitions

  • the present application relates to the field of projection display, and in particular to a projection screen and a laser projection system.
  • projection equipment mainly includes: a projection host and a projection screen.
  • the light outlet of the projection host faces the projection screen to emit a light beam to the projection screen, and the projection screen is used to receive the light beam to realize the display of the picture.
  • the embodiment of the present application provides a projection screen and a laser projection system.
  • the technical solution is as follows:
  • a projection screen comprising: a frame, an optical screen and a rotating part;
  • the frame has a front side and a back side opposite to each other, and at least a portion of the optical screen is located on the front side of the frame;
  • the rotating part is assembled on the frame and connected to the edge of the optical screen.
  • the rotating part can rotate relative to the frame, and the rotating part is fixedly connected to the frame after rotating to a target position.
  • the rotating part is configured to apply a tensioning force to the optical screen during the process of rotating relative to the frame.
  • a laser projection system comprising: a projection screen and a laser projection device, the laser projection device being used to project an image onto the projection screen, and the projection screen comprising the above-mentioned projection screen.
  • FIG1 is a schematic structural diagram of a detachable projection screen provided by the related art
  • FIG2 is a schematic diagram of the structure of a projection screen provided in an embodiment of the present application.
  • FIG3 is an exploded schematic diagram of the projection screen shown in FIG2 ;
  • FIG4 is a schematic diagram of the tensioning effect of the projection screen shown in FIG2 ;
  • FIG5 is a schematic diagram of the structure of another projection screen provided in an embodiment of the present application.
  • FIG6 is an exploded schematic diagram of the projection screen shown in FIG5 ;
  • FIG7 is a schematic diagram of the tensioning effect of the projection screen shown in FIG5 ;
  • FIG8 is a schematic diagram of the structure of another projection screen provided in an embodiment of the present application.
  • FIG9 is a schematic diagram of the structure of another projection screen provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of a partial structure of a projection screen provided in an embodiment of the present application.
  • FIG11 is a schematic diagram of an optical screen provided by an embodiment of the present application before and after tensioning
  • FIG12 is a schematic diagram of a connection between a support rod, an optical screen, and the support rod provided in an embodiment of the present application;
  • FIG13 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of another projection screen assembly provided in an embodiment of the present application.
  • FIG15 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application.
  • FIG16 is a schematic diagram of a motion trajectory of a rotating part and an optical screen provided in an embodiment of the present application
  • FIG17 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application.
  • FIG18 is a schematic diagram of another projection screen tensioning effect provided by an embodiment of the present application.
  • FIG19 is a schematic diagram of the structure of a framework provided in an embodiment of the present application.
  • FIG20 is a schematic structural diagram of a rotating part provided in an embodiment of the present application.
  • FIG21 is a schematic diagram of a first position-limiting member and a second position-limiting member provided in an embodiment of the present application;
  • FIG. 22 is a schematic diagram of another clamping connection between a first position-limiting member and a second position-limiting member provided in an embodiment of the present application;
  • FIG23 is a schematic diagram of another clamping connection between a first position-limiting member and a second position-limiting member provided in an embodiment of the present application;
  • FIG24 is a schematic diagram of a film structure of an optical screen provided in an embodiment of the present application.
  • FIG25 is a schematic diagram of the structure of another projection screen provided in an embodiment of the present application.
  • FIG26 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application.
  • FIG27 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application.
  • FIG28 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application.
  • FIG. 29 is a schematic diagram of the structure of a laser projection system provided in an embodiment of the present application.
  • the projection screen in order to solve the problem that the overall size of the projection screen is large and thus difficult to transport, the projection screen can be prepared as a detachable projection screen.
  • the projection screen 00 can generally include: a frame 01 , an optical screen 02 , a support rod (not marked in the figure) and a spring 03 .
  • the optical screen 02 in the projection screen 00 is attached to the front side of the frame 01 , and the edge of the optical screen 02 is folded over so that the optical screen 02 wraps around the edge of the frame 01 .
  • the support rods in the projection screen 00 may be located at the back of the frame 01 , and after the edge of the optical screen 02 is folded over to wrap around the edge of the frame 01 , the support rods may be connected to the edge of the optical screen 02 .
  • the spring 03 in the projection screen 00 may be located at the back of the frame 01, and one end of the spring 03 may be connected to the frame 01, and the other end may be connected to the support rod.
  • the spring 03 may be a tension spring, and the tension spring may apply a tensioning force to the support rod, so that the support rod can apply a tensioning force to the optical screen 02, thereby making the front side of the optical screen 02 (i.e., the side where the projection picture needs to be presented) flatter, so that the projection picture presented on the optical screen 02 has a better display effect.
  • the frame 01 in the projection screen 00 is a rectangular frame
  • the number of support rods in the projection screen 00 is four
  • the four support rods correspond to the four frames in the frame 01 one by one
  • each support rod can be located at the position of the corresponding frame.
  • the number of springs 03 connected to each support rod in the projection screen 00 is multiple, and through the multiple springs 03 connected to the same support rod, a uniform tensioning force can be applied to the support rod, so that the support rod can tighten the optical screen 02 from the corresponding frame in the frame 01.
  • each support rod in the projection screen 00 needs to be connected with a plurality of springs 03, the number of springs 03 in the projection screen 00 is relatively large.
  • the operator needs to apply a stretching force to each spring 03 so that one end of each spring 03 can be connected to the frame 01 and the other end can be connected to the corresponding support rod.
  • the process of the operator applying the stretching force to the spring 03 is relatively complicated. Therefore, when the number of springs 03 in the projection screen 00 is relatively large, the difficulty of assembling the projection screen 00 will be aggravated, resulting in a relatively complicated assembly process of the projection screen 00, and further resulting in a low assembly efficiency of the projection screen 00.
  • the spring 03 is very likely to produce fatigue, resulting in a reduction in the pulling force on the screen, and further resulting in poor flatness of the screen.
  • the projection screen provided in the embodiment of the present application can be applied to a laser projection system, and the laser projection system can include a laser projection device and a projection screen, wherein the laser projection device can project a projection picture onto the projection screen.
  • the projection screen carries the projection picture.
  • the projection screen 000 may include: a frame 100 , an optical screen 200 and a rotating part 300 .
  • the frame 100 has opposite front and rear surfaces a1 and a2 , and at least a portion of the optical screen 200 may be located on the front surface a1 of the frame 100 .
  • the rotating part 300 can be assembled on the frame 100.
  • the rotating part 300 can be located on one of the front side a1 and the back side a2 of the frame 100 and connected to the edge of the optical screen 200.
  • the rotating part 300 can rotate relative to the frame 100 and is fixedly connected to the frame 100 after the rotating part 300 rotates to the target position.
  • the fixed connection between the rotating part 300 and the frame 100 refers to connecting the frame 100 and the rotating part 300 so that there is no relative movement (such as relative rotation) between the frame 100 and the rotating part 300, and the fixed connection can be a detachable connection.
  • the rotating part 300 in the projection screen 000 may be configured to apply a tensioning force to the optical screen 200 during the process of rotating relative to the frame 100 .
  • the rotating part 300 and the optical screen 200 can be placed on the frame 100; then, the rotating part 300 is connected to the edge of the optical screen 200; then, the rotating part 300 is driven to rotate relative to the frame 100, and during the process of the end of the rotating part 300 connected to the optical screen 200 rotating relative to the frame 100, a tensioning force can be applied to the edge of the optical screen 200 to adjust the tension of the optical screen 200; finally, after the rotating part 300 rotates to the target position relative to the frame 100, it is fixedly connected to the frame 100 to fix the rotating part 300 on the frame 100, that is, the optical screen 200 in the projection screen 000 can be tensioned to ensure the normal use of the optical screen 200.
  • the target position of the rotating part 300 after rotation can be set according to the actual tensioning requirements of the optical screen 200, and different target positions can be used to represent: different rotation angles of the rotating part 300 relative to the frame 100.
  • the embodiment of the present application provides a projection screen, which may include: a frame, an optical screen, and a rotating part.
  • a projection screen which may include: a frame, an optical screen, and a rotating part.
  • the operator only needs to connect the rotating part to the edge of the optical screen, and apply a certain force to the rotating part so that the rotating part can rotate relative to the frame.
  • the optical screen can be tightened by applying a force to the edge of the optical screen, and the rotating part is fixedly connected to the frame after rotating to the target position to maintain a constant tension force.
  • the tensioning force can be applied to the optical screen, and the assembly of the projection screen can be completed. In this way, the difficulty of assembling the projection screen can be reduced, the assembly process of the projection screen can be effectively simplified, and the assembly efficiency of the projection screen can be ensured to be high.
  • the flatness of the front of the optical screen can be improved to ensure a better display effect of the projection image presented on the optical screen.
  • the rotating part will not produce fatigue after long-term use, so that the force of the rotating part on the optical screen is maintained better, thereby achieving a better tensioning effect on the optical screen.
  • the projection screen 000 may include: a frame 100, an optical screen 200 and a rotating part 300, and the rotating part 300 and the optical screen 200 may be assembled on the frame 100.
  • the optical screen 200 and the rotating part 300 may be located at the front side a1 of the frame 100. After the rotating part 300 rotates to the target position, it may be connected to the front side a1 of the frame 100.
  • the rotating part 300 in the projection screen 000 can be configured to apply a force close to the edge of the frame 100 to the optical screen 200 during the rotation relative to the frame 100. That is, during the rotation relative to the frame 100, the rotating part 300 can apply a force toward the edge of the frame 100 to the optical screen 200, so that the edge of the optical screen 200 moves toward the direction close to the edge of the frame 100.
  • the edge of the optical screen 200 and the edge of the frame 100 do not refer to just one edge.
  • the edge of the optical screen 200 may refer to at least a portion of the edge area located on the optical screen 200 and connected to the edge
  • the edge of the frame 100 may refer to at least a portion of the edge area located on the frame 100 and connected to the edge.
  • the rotating part 300 and the optical screen 200 can be placed on the front side a1 of the frame 100; then, the rotating part 300 is connected to the edge of the optical screen 200; thereafter, the rotating part 300 is driven to rotate relative to the frame 100.
  • the target position of the rotating part 300 after rotation can be set according to the actual tensioning requirement of the optical screen 200 , and different target positions can be used to represent: different rotation angles of the rotating part 300 relative to the frame 100 .
  • the operator only needs to connect the rotating part 300 located on the front a1 of the frame 100 with the edge of the optical screen 200 located on the front a1 of the frame 100, and apply a certain force to the rotating part 300 so that the rotating part 300 can rotate relative to the frame 100.
  • the optical screen 200 can be tightened by applying a force to the optical screen 200, and after the rotating part 300 rotates to the target position, it is connected to the front a1 of the frame 100 to maintain a constant tension force, and the assembly of the projection screen 000 can be completed.
  • the rotational displacement of the rotating part 300 relative to the frame 100 is used to achieve the tightening of the optical screen 200. After long-term use, the rotating part 300 will not produce fatigue, so that the force of the rotating part 300 on the optical screen 200 is maintained well, thereby achieving a better tightening effect on the optical screen 200.
  • the edge of the optical screen 200 does not need to be folded to the back side a2 of the frame 100 for connection, so that the edge of the optical screen 200 does not need to be directly in contact with the frame 100, thereby avoiding damage to the optical screen 200 by the frame 100.
  • the projection screen 000 may include: a frame 100, an optical screen 200 and a rotating part 300, and the rotating part 300 and the optical screen 200 may be assembled on the frame 100.
  • the optical screen 200 is attached to the front side a1 of the frame 100, and the edge of the optical screen 200 is folded so that the optical screen 200 wraps the edge of the frame 100.
  • the rotating part 300 is located at the back side a2 of the frame 100. In some specific embodiments, the rotating part 300 may be directly connected to the back side a2 of the frame 100 after rotating to the target position.
  • the rotating part 300 in the projection screen 000 is configured to apply a force away from the edge of the frame 100 to the optical screen 200 during the rotation relative to the frame 100. That is, during the rotation relative to the frame 100, the rotating part 300 applies a force away from the edge of the frame 100 to the optical screen 200, so that the edge of the optical screen 200 moves in a direction away from the edge of the frame 100.
  • the operator when the operator needs to assemble the projection screen 000, first, the operator can fold the edge of the optical screen 200 so that the optical screen 20 wraps the edge of the frame 100; then, the rotating part 300 is placed on the back side a2 of the frame 100 and connected to the edge of the optical screen 200; thereafter, the rotating part 300 is driven to rotate relative to the frame 100, and during the process of the end of the rotating part 300 connected to the optical screen 200 rotating relative to the frame 100, a force away from the edge of the frame 100 can be applied to the optical screen 200 to adjust the tension of the optical screen 200; finally, after the rotating part 300 rotates to the target position relative to the frame 100, it is engaged with the back side a2 of the frame 100 to fix the rotating part 300 on the frame 100, that is, the optical screen 200 in the projection screen 000 can be tensioned to ensure the normal use of the optical screen 200.
  • the target position of the rotating part 300 after rotation can be set according to the actual tensioning requirements of the optical screen 200,
  • the operator only needs to fold the rotating part 300 and the optical screen 200 to the edge of the back a2 of the frame 100 for connection, and apply a certain force to the rotating part 300 so that the rotating part 300 can rotate relative to the frame 100.
  • the optical screen 200 can be tightened by applying a force to the optical screen 200, and after the rotating part 300 rotates to the target position, it is clamped with the back a2 of the frame 100 to maintain a constant tension force, and the assembly of the projection screen 000 can be completed. In this way, the difficulty of assembling the projection screen 000 can be reduced, the assembly process of the projection screen 000 is effectively simplified, and the assembly efficiency of the projection screen 000 can be ensured to be high.
  • the rotating part 300 will not produce fatigue after long-term use, so that the force of the rotating part 300 on the optical screen 200 is kept good, and the tensioning effect of the optical screen 200 is good.
  • the frame 100 in the projection screen 000 may include: two long frames A arranged oppositely and two short frames B arranged oppositely.
  • the number of the rotating parts 300 connected to the long frame A in the frame 100 may be at least one, that is, at least one rotating part 300 can rotate relative to the long frame A of the frame 100 after being connected to the edge of the optical screen 200;
  • the number of the rotating parts 300 connected to the short frame B in the frame 100 may be at least one, that is, at least one rotating part 300 can rotate relative to the short frame B of the frame 100 after being connected to the edge of the optical screen 200.
  • angle irons can be used to fix between each two adjacent long frames A and short frames B, so that the two long frames A and the two short frames B can be surrounded by a rectangular frame.
  • the frame 100 may also include: at least one auxiliary frame F, the auxiliary frame F may be located between the two oppositely arranged long frames A, and the two ends of the auxiliary frame F may be fixedly connected to the two long frames A respectively. In this way, the auxiliary frame F can stably support the two long frames A in the frame to prevent them from falling and deforming after long-term use.
  • the rotating part 300 in the projection screen 000 may include: a bearing member 301 connected to the edge of the optical screen 200, and a rotating member 302 connected to the bearing member 301, and the rotating member 302 can rotate relative to the frame 100.
  • the end of the bearing member 301 connected to the edge of the optical screen 200 can be closer to the edge of the frame 100 than the end of the rotating member 302 rotating relative to the frame 100.
  • the bearing member 301 has a first end connected to the edge of the optical screen 200, and the rotating member 302 has a second end rotatably connected to the frame 100.
  • the first end of the bearing member 301 can be located on a side of the second end of the rotating member 302 close to the edge of the frame 100.
  • the rotating member 302 can rotate relative to the frame 100.
  • the supporting member 301 can be driven to rotate relative to the frame 100, and the supporting member 301 can apply a force close to the edge of the frame 100 to the optical screen 200 to tighten the optical screen 200.
  • the supporting member 301 will drive the edge of the optical screen 200 to generate a sub-movement in the horizontal direction (a direction parallel to the front of the frame 100) and a sub-movement in the vertical direction (a direction perpendicular to the front of the frame 100) and close to the frame 200.
  • the rotating part 302 rotates to the target position relative to the frame 100, the length of the optical screen 200 will be stretched from the original L1 to L2, and the value of L2 is greater than the value of L1, so that the optical screen 200 is tightened.
  • the rotating member 302 in the rotating portion 300 can be a rotating plate
  • the length extension direction of the rotating plate can be parallel to the length extension direction of the corresponding connected frame
  • the supporting member 301 can be arranged on one side of the rotating member 302 close to the edge of the frame 100.
  • the frame 100 in the projection screen may include: a bottom plate 100a and a side plate 100b connected to each other, a rotating member 302 in the rotating part 300 can rotate relative to the bottom plate 100a, and after the rotating part 300 rotates to the target position, the bottom plate 100a can be connected to the rotating member 302; and/or, the bearing member 301 can be connected to the side plate 100b.
  • connection between the frame 100 and the rotating part 300 may include: the bottom plate 100a is connected to the rotating member 302, the bearing member 301 is connected to the side plate 100b, and the bottom plate 100a is connected to the rotating member 302, and the bearing member 301 is connected to the side plate 100b. At least one connection method.
  • the bottom plate 100a in the frame 100 can be connected to the rotating member 302 in the rotating part 300 to connect and fix the rotating part 300 to the frame 100; or, after the rotating part 300 rotates to the target position, the side plate 100b in the frame 100 can be connected to the supporting member 301 in the rotating part 300 to connect and fix the rotating part 300 to the frame 100; or, after the rotating part 300 rotates to the target position, the bottom plate 100a in the frame 100 can be connected to the rotating member 302 in the rotating part 300, and the side plate 100b in the frame 100 can be connected to the supporting member 301 in the rotating part 300 to achieve a stable connection between the rotating part 300 and the frame 100.
  • the base plate 100a in the frame 100 has a first mounting through hole
  • the rotating member 302 in the rotating part 300 has a second mounting through hole opposite to the first mounting through hole
  • the projection screen may further include a fixing bolt, which may be located in the first mounting hole and the second mounting hole
  • the base plate 100a in the frame 100 may be connected to the rotating member 302 in the rotating part 300 through the fixing bolt.
  • the side of the bottom plate 100a in the frame 100 facing the optical screen may have a first bearing groove 100d, at least a portion of the rotating member 302 may be located in the first bearing groove 100d, and the end of the rotating member 302 away from the bearing member 301 can rotate relative to the bottom plate 100a in the first bearing groove 100d, that is, the end of the rotating member 302 away from the bearing member 301 can be rotatably connected to the first bearing groove 100d.
  • the relative position between the frame 100 and the rotating part 300 includes: the bearing member 301 contacts the side of the side plate 100b in the frame 100 close to the optical screen 200, the rotating member 302 contacts the bottom surface of the first bearing groove 100d, and the bearing member 301 contacts the side of the side plate 100b close to the optical screen 200, and the rotating member 302 At least one relative position in contact with the bottom surface of the first bearing groove 100d.
  • the side plate 100b and the bottom plate 100a in the frame 100 can be perpendicular to each other, and the bearing member 301 and the rotating member 302 in the rotating part 300 can be perpendicular to each other.
  • the first end of the bearing member 301 can be connected to the optical screen 200.
  • the second end of the bearing member 301 can be fixedly connected to the first end of the rotating member 302, and the second end of the rotating member 302 can rotate relative to the frame 100.
  • the projection screen 000 may further include: a support rod 400.
  • the carrier 301 in the rotating part 300 may have a bearing cavity 301a, and an opening 301b communicating with the bearing cavity 301a, and the opening 301b may be located on a side of the carrier 301 close to the edge of the optical screen 200.
  • the edge of the optical screen 200 may have a receiving pocket a1, and the receiving pocket a1 may have a port for the support rod 400 to enter.
  • the edge of the optical screen 200 may be connected to the support rod 400, that is, the edge of the optical screen 200 may be connected to the support rod 400 after wrapping the edge of the frame 100, and the support rod 400 may be snapped into the bearing cavity 301a through the opening 301b in the carrier 301.
  • the support rod 400 can be connected to the edge of the optical screen 200 and can be snapped into the bearing cavity 301a of the bearing member 301.
  • the support rod 400 can be installed in the receiving pocket a1 through the port of the receiving pocket a1. In this way, the assembly process of the support rod 400 and the optical screen 200 is simplified, and the receiving pocket a1 can limit the support rod 400.
  • the edge of the frame 100 in the projection screen 000 may have a snap-in groove 101 (i.e., the side of the bottom plate 100a close to the optical screen 200 may have a snap-in groove 101), and the second end of the rotating member 302 may be located in the snap-in groove 101, that is, the end of the rotating member 302 rotating relative to the frame 100 may extend into the snap-in groove 101 on the edge of the frame 100 and abut against the inner wall of the snap-in groove 101.
  • the end of the rotating member 302 rotating relative to the frame 100 may extend into the snap-in groove 101 and abut against the inner wall of the snap-in groove 101. In this way, the end of the rotating member 302 rotating relative to the frame 100 can slide relative to the inner wall of the snap-in groove 101 in the snap-in groove 101, so as to realize the relative rotation between the rotating part 300 and the frame 100.
  • the clamping groove 101 on the edge of the frame 100 may have a first plane c1 parallel to the front surface b1 of the optical screen 200, and a second plane c2 adjacent to the first plane c1, the second plane c2 is closer to the front surface b1 of the optical screen 200 relative to the first plane c1, and the angle between the first plane c1 and the second plane c2 in the clamping groove 101 may be an acute angle.
  • the front surface b1 of the optical screen 200 may be a side of the optical screen 200 used for normal display of the projection image.
  • the angle between the first plane c1 and the second plane c2 of the clamping groove 101 is an acute angle, the end of the rotating member 302 rotating relative to the frame 100 extends into the clamping groove 101.
  • the clamping groove 101 can play a certain limiting role on the rotating member 302 in the rotating part 300, preventing the rotating member 302 from being separated from the clamping groove 101 in the frame 100.
  • the end of the rotating member 302 that rotates relative to the frame 100 may have an arc-shaped convex surface d1, and the end of the rotating member 302 that rotates relative to the frame 100 abuts against the inner wall of the clamping groove 101 of the frame 100 through the arc-shaped convex surface d1, thereby ensuring that the rotating member 302 in the rotating part 300 can slide smoothly relative to the frame 100.
  • the rotating part 300 in the projection screen 000 may further include: a connecting shaft 303, the connecting shaft 303 is connected to the end of the rotating member 302 that rotates relative to the frame 100, that is, the connecting shaft 303 is connected to the second end of the rotating member 302, and the connecting shaft 303 can be rotatably connected to the edge of the frame 100.
  • the rotating part 300 can be rotatably connected to the edge of the frame 100 through the connecting shaft 303, further ensuring the connection stability of the rotating part 300 and the edge of the frame 100 when the rotating part 300 rotates relative to each other.
  • the connecting shaft 303 can be provided at the end of the rotating member 302 that rotates relative to the frame 100, and a connecting hole (not shown in the figure) can be provided at the edge of the frame 100, at least part of the connecting shaft 303 can be located in the connecting hole, and the rotation of the rotating part 300 relative to the frame 100 is achieved through the cooperation of the connecting shaft and the connecting hole.
  • a connection hole may be provided at the end of the rotating member that rotates relative to the frame, and a connection shaft may be provided at the edge of the frame, and the connection shaft is rotationally connected to the connection hole.
  • other transmission members may also be used to achieve relative rotation between the rotating member and the edge of the frame, and the embodiments of the present application do not specifically limit this.
  • the rotating part 300 in the projection screen 000 may further include: a first stopper 304, the first stopper 304 is fixedly connected to the edge side of the carrier 301 away from the optical screen 200, the frame 100 further includes a second stopper 102, and the side of the side plate 100b in the frame 100 away from the bottom plate 100a may have a first stopper groove 100c, and the second stopper 102 may be located in the first stopper groove 100c.
  • the first stopper 304 in the rotating part 300 may be engaged with the second stopper 102 in the first stopper groove 100c in the frame 100.
  • the first stopper 304 is arranged on the edge side of the carrier 301 away from the optical screen 200, and the second stopper 102 is arranged on the side plate 100b in the frame 100.
  • the rotating part 300 can be conveniently fixed by the snap-fitting action of the first limiter 304 and the second limiter 102 , and then a constant tensioning force is applied to the optical screen 200 through the supporting member 301 .
  • the rotating part 300 in the projection screen 000 may include: a supporting member 301 connected to the edge of the optical screen 200, and a rotating member 302 connected to the supporting member 301, and the rotating member 302 can rotate relative to the frame 100.
  • the end of the rotating member 302 that rotates relative to the frame 100 may be closer to the edge of the frame 100 than the end of the supporting member 301 that is connected to the edge of the optical screen 200.
  • the support member 301 can also be driven to rotate relative to the frame 100, and the support member 301 can apply a force away from the edge of the frame 100 to the optical screen 200 to tighten the optical screen 200.
  • the rotating part 300 by disposing the first stopper 304 in the rotating part 300, disposing the second stopper groove 100h on the connecting member 100g in the frame 100, and the second stopper 102 located in the second stopper groove 100h.
  • the rotating part 300 can be conveniently fixed by the first limiting member 304 and the second limiting member 102 in the second limiting groove 100h, and then a constant tensioning force is applied to the optical screen 200 through the supporting member 301.
  • One of the first stopper 304 in the rotating part 300 and the second stopper 102 in the frame 100 may include an elastic protrusion 102a, which may be used to engage with the other of the first stopper 304 and the second stopper 102.
  • the first stopper 304 in the rotating part 300 may include an elastic protrusion 102a, which may be used to engage with the second stopper 102 in the frame 100; or the second stopper 102 in the frame 100 may include an elastic protrusion 102a, which may be used to engage with the first stopper 304 in the rotating part 300.
  • the second position-limiting member 102 in the frame 100 includes an elastic protrusion 102a, which is clamped with the first position-limiting member 304 in the rotating part 300.
  • the first position-limiting member 304 in the rotating part 300 can be clamped with the elastic protrusion 102a on the frame 100, thereby conveniently realizing the clamping and fixing of the rotating part 300.
  • a threaded hole e1 may be provided on the carrier 301, and the first position-limiting member may be a pin or a screw, and the first position-limiting member may be fixedly connected to the carrier 301 through the threaded hole e1.
  • the first stopper 304 and the second stopper 102 shown in FIG. 21 may be a schematic diagram of the first stopper 304 and the second stopper 102 in FIG. 13, and the first stopper 304 and the second stopper 102 shown in FIG. 22 may be a schematic diagram of the first stopper 304 and the second stopper 102 in FIG. 17.
  • the second stopper 102 in the frame 100 may have a guide groove 102b.
  • the elastic protrusion 102a may include: an elastic element C and a protrusion D, the elastic element C may be located in the guide groove 102b in the frame 100, and a portion of the protrusion D may be located in the guide groove 102b, and a portion may be located outside the guide groove 102b.
  • the elastic element C can be distributed between the bottom of the guide groove 102b (the bottom of the guide groove can be the side of the guide groove opposite to the protrusion located in the guide groove) and the protrusion D, and can be connected to the bottom of the guide groove 102b and the protrusion D respectively.
  • the first limiting member 304 in the rotating part 300 can be engaged with the protrusion D in the elastic protrusion 102a, thereby achieving the limiting of the first limiting member 304.
  • the guide groove 102b can play a certain guiding role in the movement of the protrusion D, reduce the probability of misalignment when the protrusion D contacts the first limiting member 304, and ensure the limiting role of the protrusion D on the first limiting member 304.
  • the first position-limiting member 304 in the rotating part 300 may have a third position-limiting groove e2 that cooperates with the protrusion D in the elastic protrusion 102a.
  • the protrusion D may be engaged with the side of the first position-limiting member 304 close to the front side b1 of the optical screen 200.
  • the second position-limiting member 102 may include two elastic protrusions 102a disposed opposite to each other, and the number of corresponding guide grooves 102b may be two. The two elastic protrusions 102a disposed opposite to each other can further ensure the engagement effect with the first position-limiting member 304.
  • the rotating part 300 rotates to the target position relative to the frame 100, that is, the guide groove 102b in the second limiting member 102 and the third limiting groove e2 in the first limiting member 304 can be connected; the protrusion D can move in the direction away from the bottom of the guide groove 102b under the elastic force of the elastic element C, so that a part of the protrusion D can be located in the third limiting groove e2 in the first limiting member 304, that is, the first limiting member 304 and the second limiting member 102 can be snapped together.
  • the protruding member D can be engaged with the side of the first limiting member 304 close to the front surface b1 of the optical screen 200, that is, the protruding member D can limit the first limiting member 304 at this time to prevent the first limiting member 304 from rotating in the direction close to the front surface b1 of the optical screen 200.
  • the protruding member D in the elastic protruding part 102a can be a limiting sphere partially located in the guide groove 102b and partially located outside the guide groove 102b.
  • the elastic element C in the elastic protruding part 102a can be a compression spring located between the bottom of the guide groove 102b and the protruding member D.
  • the optical screen 200 in the projection screen 000 may include: a flexible support layer 201 and a plurality of optical layers 202, the edge of the flexible support layer 201 is folded so that the flexible support layer 201 wraps the edge of the frame 100, and at least part of the optical layers 202 may be located on the side of the flexible support layer 201 close to the frame 100.
  • the flexible support layer 201 in the optical screen 200 can be directly fixed to the frame 100 without being fixed to the frame through a synthetic cloth, thereby reducing the structural complexity of the projection screen 000 and eliminating the wave distortion phenomenon of the projected image caused by the difference in expansion and contraction between the synthetic cloth and the film (not shown in the figure).
  • the flexible support layer 201 can also be used as a substrate when making other optical layers.
  • the optical screen in some specific embodiments can also be formed by bonding a film on a synthetic cloth, and the edge of the synthetic cloth is folded so that the synthetic cloth wraps the edge of the frame.
  • the projection screen 000 may further include: an auxiliary frame 500 connected to the frame 100, the auxiliary frame 500 may include: a first sheet structure 501 and a second sheet structure 502, one side of the first sheet structure 501 may be connected to the second sheet structure 502.
  • the first sheet structure 501 is fixedly connected to one side of the second sheet structure 502, that is, a part of the edge of the first sheet structure 501 is fixedly connected to one side of the second sheet structure 502.
  • the first sheet structure 501 can be located on the side of the rotating part 300 away from the frame 100 in a direction perpendicular to the front of the optical screen 200 (for example, the Y-axis direction in the figure).
  • the second sheet structure 502 can be located on the side of the frame 100 away from the rotating part 300 in a direction parallel to the front of the optical screen 200 (for example, the X-axis direction in the figure).
  • the front of the frame 100 can be decorated by the first sheet structure 501 in the auxiliary frame 500
  • the side of the frame 100 can be decorated by the second sheet structure 502, so that when the user watches from the front of the frame 100, only the optical screen 200 and the auxiliary frame 500 in the projection screen 000 can be seen, so that the appearance of the front of the frame 100 is better.
  • the auxiliary frame 500 in the projection screen 000 may further include: a third sheet structure 503 fixedly connected to the side of the second sheet structure 502 away from the first sheet structure 501, and the third sheet structure 503 may be located on the back of the frame 100.
  • the third sheet structure 503 may be connected to the frame 100; or, after the rotating part 300 rotates to the target position, the third sheet structure 503 may be connected to the frame 100 and the rotating part 300 (e.g., a rotating member in the rotating part) at the same time.
  • the third sheet structure 503 may be provided in the auxiliary frame 500, and the third sheet structure 503 may be located on the back of the frame 100 to be connected to the frame 100, so as to connect the auxiliary frame 500 to the frame 100.
  • the optical screen 200 in the projection screen 000 may include: a flexible support layer 201 and a plurality of optical layers 202, and the edge of the flexible support layer 201 may be connected to the rotating part 300.
  • the first sheet structure 501 in the auxiliary frame 500 may at least cover the portion of the flexible support layer 201 connected to the rotating part 300, and the first sheet structure 501 may be staggered with at least part of the optical layers 202.
  • the portion of the flexible support layer 201 connected to the rotating part 300 may be covered by the first sheet structure 501 in the auxiliary frame 500, and the first sheet structure 501 may be staggered with at least part of the optical layers 202.
  • the first sheet structure 501 can maximize the display area of the optical layer 202 used to display the projection image in the optical screen 200 while decorating the front of the frame 100.
  • the multiple optical layers 202 may be located on the side of the flexible support layer 201 close to the frame 100. In this way, at least part of the multiple optical layers can be protected by the flexible support layer 201.
  • the multiple optical layers 202 in the optical screen 200 may include: a surface anti-light layer 202a located on the side of the flexible support layer 201 away from the frame 100, and a first adhesive layer 202b, a coloring layer 202c, a second adhesive layer 202d, a substrate layer 202e, a Fresnel lens layer 202f and a reflective layer 202g stacked and arranged on the side of the flexible support layer 201 close to the frame 100.
  • the coloring layer 202c can be bonded to the side of the flexible support layer 201 close to the frame 100 through the first adhesive layer 202b; the substrate layer 202e can be bonded to the side of the coloring layer 202c close to the frame 100 through the second adhesive layer 202d; the Fresnel lens layer 202f and the reflective layer 202g can be formed on the side of the substrate layer 202e close to the frame 100.
  • the light can be incident from the side of the anti-light surface layer 202a, and after passing through other film layers, it is finally reflected by the reflective layer 202g, and then incident from the anti-light surface layer 202a into the user's eyes.
  • the first adhesive layer 202b and the second adhesive layer 202d can both be formed of optically transparent adhesive.
  • the optically transparent adhesive can be UV adhesive.
  • the material of the substrate layer 202e can be the same as that of the flexible support layer 201, which will not be repeated here.
  • the flexible support layer 201 can be a PU flexible support layer made of polyurethane (English: Polyurethane; abbreviated: PU) material.
  • PU is flexible and can be curled arbitrarily without deformation. It also has the advantages of wear resistance, high temperature resistance, high toughness, oil resistance, and strong mechanical properties.
  • PU is used to make a PU flexible support layer, so that the flexible support layer is flexible and can be curled.
  • the flexible support layer can also be made of other flexible materials.
  • a TPU flexible support layer can be made of a thermoplastic polyurethane elastomer rubber (English: Thermoplastic polyurethanes; abbreviated: TPU) material.
  • TPU has elasticity and can be curled.
  • Using TPU to make a TPU flexible support layer can also make the flexible support layer flexible and can be curled.
  • the flexible support layer 201 can also be made of flexible materials such as polyethylene terephthalate (PET), styrene-based thermoplastic elastomers, also known as styrene-based block copolymers (SBC), etc., all of which can make the flexible support layer flexible and curlable.
  • PET polyethylene terephthalate
  • SBC styrene-based block copolymers
  • the material of the substrate layer 202e can be the same as that of the flexible support layer 201, which will not be repeated here.
  • the first sheet structure 501 can cover the portion of the flexible support layer 201 connected to the rotating part 300 and the portion of the anti-light surface layer 202a connected to the edge of the flexible support layer 201.
  • the anti-light surface layer 202a is further provided with diffusion particles 202h, and the material of the diffusion particles 202h can be PMMA. In this way, the light can be diffused by the diffusion particles 202h in the process of entering and emitting from the anti-light surface layer 202a, thereby improving the viewing angle of the optical screen 200.
  • the anti-light surface layer 202a may not be provided with diffusion particles, and the diffusion particles may be provided in the flexible support layer, the substrate layer, the coloring layer, the adhesive layer and the Fresnel lens layer.
  • a special diffusion layer (not shown in the figure) can also be provided in the optical screen, and the diffusion layer has a diffusion base layer, and the diffusion base layer is distributed with diffusion particles.
  • the colored layer 202c in the optical screen 200 may include a colored base layer and a dark dye (not shown) disposed in the colored base layer. It should be noted that, in the case of providing a colored layer, it is not necessary to provide a dark dye in the anti-light surface layer, the flexible support layer, the Fresnel lens layer and the reflective layer to prevent the energy of the light from being absorbed too much and reducing the brightness of the optical screen.
  • the flexible support layer 201 in the optical screen 200 may be a synthetic cloth 201b, and the optical layer 202 may be a film attached to the side of the synthetic cloth 201b away from the frame.
  • the rotating part 300 may be connected to the edge of the synthetic cloth 201b, and the first sheet structure 501 may cover the portion of the synthetic cloth 201b connected to the rotating part 300, and the first sheet structure 501 may It can be arranged staggered with the diaphragm.
  • a side e3 of the first sheet structure 501 in the auxiliary frame body 500 that is away from the second sheet structure 502 may be flush with a side e4 of at least some of the optical layers 202.
  • the narrow frame design of the projection screen 000 is facilitated, and the optical layer 202 can be guaranteed to have a maximum display area.
  • the side e3 of the first sheet structure 501 facing away from the second sheet structure 502 can be flush with the side of the diaphragm; when the flexible supporting layer 201 is a supporting layer made of materials such as PU or PET, the side e3 of the first sheet structure 501 facing away from the second sheet structure 502 can be flush with the sides of the first adhesive layer 202b, the coloring layer 202c, the second adhesive layer 202d, the substrate layer 202e, the Fresnel lens layer 202f and the reflective layer 202g.
  • the embodiment of the present application provides a projection screen, which may include: a frame, an optical screen, and a rotating part.
  • a projection screen which may include: a frame, an optical screen, and a rotating part.
  • the operator only needs to connect the rotating part to the edge of the optical screen, and apply a certain force to the rotating part so that the rotating part can rotate relative to the frame.
  • the optical screen can be tightened by applying a force to the edge of the optical screen, and the rotating part is fixedly connected to the frame after rotating to the target position to maintain a constant tension force.
  • the tensioning force can be applied to the optical screen, and the assembly of the projection screen can be completed. In this way, the difficulty of assembling the projection screen can be reduced, the assembly process of the projection screen can be effectively simplified, and the assembly efficiency of the projection screen can be ensured to be high.
  • the flatness of the front of the optical screen can be improved to ensure a better display effect of the projection image presented on the optical screen.
  • the rotating part will not produce fatigue after long-term use, so that the force of the rotating part on the optical screen is maintained better, thereby achieving a better tensioning effect on the optical screen.
  • the embodiment of the present application also provides a laser projection system, which can be an ultra-short-throw laser projection system.
  • a laser projection system can include: a projection screen 000 and a laser projection device 001.
  • the projection screen 000 can be any of the projection screens shown in the above embodiments.
  • the laser projection device 001 when the laser projection device 001 is working, the laser projection device 001 can not only emit light obliquely upward, but also project a picture onto the projection screen 000 .

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Abstract

本申请公开了一种投影屏幕和激光投影系统，属于投影显示领域。所述投影屏幕包括：框架、光学屏幕和转动部。在对投影屏幕组装时，操作人员仅需要将转动部与光学屏幕的边缘连接，且向转动部施加一定的作用力使得转动部能够相对于框架转动，转动部在相对于框架转动的过程中，能够通过向光学屏幕的边缘施加的作用力将光学屏幕拉紧，并在转动部转动至目标位置后与框架固定连接，以保持恒定的拉紧力，能够向光学屏幕施加张紧作用力，即可完成投影屏幕的组装。

Description

投影屏幕和激光投影系统
本申请要求于2023年06月16日提交的申请号为202310721820.9、申请名称为“投影屏幕”和2023年06月16日提交的申请号为202310723298.8、申请名称为“投影屏幕”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及投影显示领域，特别涉及一种投影屏幕和激光投影系统。
背景技术
随着科技的不断发展，投影设备越来越多的应用于消费者的工作和生活中。目前，投影设备主要包括：投影主机和投影屏幕。其中，投影主机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。
发明内容
本申请实施例提供了一种投影屏幕和激光投影系统。所述技术方案如下：
根据本申请的一方面，提供了一种投影屏幕，所述投影屏幕包括：框架、光学屏幕和转动部；
所述框架具有相对的正面和背面，所述光学屏幕的至少部分位于所述框架的正面；
所述转动部装配于所述框架上，且与所述光学屏幕的边缘连接，所述转动部能够相对于所述框架转动，且所述转动部在转动至目标位置后与所述框架固定连接；
其中，所述转动部被配置为：在相对于所述框架转动的过程中，向所述光学屏幕施加张紧作用力。
根据本申请的另一方面，提供了一种激光投影系统，所述激光投影系统包括：投影屏幕和激光投影设备，所述激光投影设备用于向所述投影屏幕投射画面，所述投影屏幕包括上述的投影屏幕。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术提供的一种可拆卸的投影屏幕的结构示意图；
图2是本申请实施例提供的一种投影屏幕的结构示意图；
图3是图2示出的投影屏幕的爆炸示意图；
图4是图2示出的投影屏幕的张紧效果示意图；
图5是本申请实施例提供的另一种投影屏幕的结构示意图；
图6是图5示出的投影屏幕的爆炸示意图；
图7是图5示出的投影屏幕的张紧效果示意图；
图8是本申请实施例提供的另一种投影屏幕的结构示意图；
图9是本申请实施例提供的另一种投影屏幕的结构示意图；
图10是本申请实施例提供的一种投影屏幕的部分结构示意图；
图11是本申请实施例提供的一种光学屏幕张紧前后示意图；
图12是本申请实施例提供的一种支撑杆、光学屏幕以及支撑杆的连接示意图；
图13是本申请实施例提供的另一种投影屏幕的部分结构示意图；
图14是本申请实施例提供的另一种投影屏幕组装示意图；
图15是本申请实施例提供的另一种投影屏幕的部分结构示意图；
图16是本申请实施例提供的一种转动部与光学屏幕的运动轨迹示意图；
图17是本申请实施例提供的另一种投影屏幕的部分结构示意图；
图18是本申请实施例提供的另一种投影屏幕张紧的效果示意图；
图19是本申请实施例提供的一种框架的结构示意图；
图20是本申请实施例提供的一种转动部的结构示意图；
图21是本申请实施例提供的一种第一限位件和第二限位件的卡接示意图；
图22是本申请实施例提供的另一种第一限位件和第二限位件的卡接示意图；
图23是本申请实施例提供的另一种第一限位件和第二限位件的卡接示意图；
图24是本申请实施例提供的一种光学屏幕的膜层结构示意图；
图25是本申请实施例提供的另一种投影屏幕的结构示意图；
图26是本申请实施例提供的另一种投影屏幕的部分结构示意图；
图27是本申请实施例提供的另一种投影屏幕的部分结构示意图；
图28是本申请实施例提供的另一种投影屏幕的部分结构示意图；
图29是本申请实施例提供的一种激光投影系统的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
在相关技术中，为了解决投影屏幕的整体尺寸较大，导致其运输难度较大的问题，可以将投影屏幕制备成可拆卸的投影屏幕。例如，请参考图1，投影屏幕00通常可以包括：框架01、光学屏幕02、支撑杆(图中未标注)和弹簧03。
投影屏幕00中的光学屏幕02贴合在框架01的正面，光学屏幕02的边缘翻折，以使光学屏幕02包裹框架01的边缘。
投影屏幕00中的支撑杆可以位于框架01的背面，且在光学屏幕02的边缘翻折以包裹框架01的边缘后，支撑杆可以与光学屏幕02的边缘连接。
投影屏幕00中的弹簧03可以位于框架01的背面，且弹簧03的一端可以与框架01连接，另一端与支撑杆连接。这里，弹簧03可以为拉伸弹簧，通过拉伸弹簧可以对支撑杆施加拉紧力，使得支撑杆能够对光学屏幕02施加拉紧力，进而使得光学屏幕02的正面(也即需要呈现投影画面的一面)平坦性较好，以使在光学屏幕02上呈现的投影画面的显示效果较好。
通常情况下，投影屏幕00中的框架01为矩形框架，投影屏幕00中的支撑杆的个数为四个，四个支撑杆分别与框架01中的四个边框一一对应，每个支撑杆可以位于对应的边框所在位置处。投影屏幕00中与每个支撑杆连接的弹簧03的个数均为多个，通过与同一个支撑杆连接的多个弹簧03，能够对这个支撑杆施加均匀的拉紧力，使得这个支撑杆能够从框架01中对应的边框处拉紧光学屏幕02。
由于投影屏幕00中的每个支撑杆均需要连接多个弹簧03。因此，投影屏幕00中的弹簧03的数量较多。在投影屏幕00的组装过程中，操作人员需要对每个弹簧03均需要施加拉长力，使得各个弹簧03的一端可以与框架01连接，另一端可以与相应的支撑杆连接。而操作人员对弹簧03施加拉长力的过程比较复杂，为此，当投影屏幕00中的弹簧03的数量较多时，会加剧投影屏幕00的组装难度，导致投影屏幕00的组装过程较为复杂，进而导致投影屏幕00的组装效率较低。且弹簧03在长期使用后，弹簧03极易产生疲劳现象，导致对屏幕的拉力减小，进而导致屏幕平整度较差。
本申请实施例提供的投影屏幕可以应用于激光投影系统中，该激光投影系统可以包括激光投影设备和投影屏幕，其中，激光投影设备可以向投影屏幕投射投影画面。投影屏幕承载投影画面。
在一些具体实施例中，请参考图2、图3和图4，投影屏幕000可以包括：框架100、光学屏幕200和转动部300。
框架100具有相对的正面a1和背面a2，光学屏幕200的至少部分可以位于框架100的正面a1。
转动部300可以装配于框架100上，在一些具体实施例中，转动部300可以位于框架100的正面a1和背面a2中的一面上，且与光学屏幕200的边缘连接，转动部300能够相对于框架100转动，且在转动部300转动至目标位置后与框架100固定连接。
可以理解的是，在一些具体实施例中转动部300与框架100固定连接是指通过将框架100和转动部300连接，以使得框架100和转动部300之间不具有相对运动(如，相对转动)的连接，该固定连接可以为可拆式连接。
其中，投影屏幕000中的转动部300可以被配置为：在相对于框架100转动的过程中，能够向光学屏幕200施加张紧作用力。
在一些具体实施例中，当操作人员需要对投影屏幕000进行组装时，首先，可以将转动部300和光学屏幕200均置于框架100上；然后，将转动部300与光学屏幕200的边缘连接；之后，驱动转动部300相对于框架100进行转动，在转动部300与光学屏幕200连接的端部相对于框架100转动的过程中，能够向光学屏幕200的边缘施加张紧作用力，以调整光学屏幕200的张紧度；最后，在转动部300相对于框架100转动至目标位置后与框架100固定连接，以将转动部300固定在框架100上，即能够实现对投影屏幕000中的光学屏幕200的张紧，保证光学屏幕200的正常使用。需要说明的是，在一些具体实施例中可以根据对光学屏幕200的实际张紧需求设置转动部300转动后的目标位置，且不同的目标位置可以用来表征：转动部300相对于框架100的不同转动角度。
综上所述，本申请实施例提供了一种投影屏幕，可以包括：框架、光学屏幕和转动部。在对投影屏幕组装时，操作人员仅需要将转动部与光学屏幕的边缘连接，且向转动部施加一定的作用力使得转动部能够相对于框架转动，转动部在相对于框架转动的过程中，能够通过向光学屏幕的边缘施加的作用力将光学屏幕拉紧，并在转动部转动至目标位置后与框架固定连接，以保持恒定的拉紧力，能够向光学屏幕施加张紧作用力，即可完成投影屏幕的组装。如此，可以降低投影屏幕的组装难度，有效的简化了投影屏幕的组装过程，进而可以保证投影屏幕的组装效率较高。
另外，如此可以使得光学屏幕的正面平坦性较好，以保证在光学屏幕上呈现的投影画面的显示效果较好。另外，通过采用转动部相对于框架的转动移位实现对光学屏幕的拉紧，在长时间使用后转动部并不会产生疲劳现象，使得转动部对光学屏幕的作用力保持较好，进而使得对光学屏幕的张紧效果较好。
在一些具体实施例中，如图2、图3和图4所示，投影屏幕000可以包括：框架100、光学屏幕200和转动部300，转动部300和光学屏幕200均可以装配于框架100上。其中，光学屏幕200和转动部300均可以位于框架100的正面a1。在转动部300转动至目标位置后可以与框架100的正面a1连接。
其中，投影屏幕000中的转动部300可以被配置为：在相对于框架100转动的过程中，能够向光学屏幕200施加靠近框架100的边缘的作用力。即就是，转动部300在相对于框架100转动的过程中，可以向光学屏幕200施加朝向框架100的边缘的作用力，以使光学屏幕200的边缘朝向靠近框架100的边缘的方向移动。
可以理解的是，在一些具体实施例中，光学屏幕200的边缘，以及框架100的边缘并不仅仅指一个边，上述光学屏幕200的边缘可以指位于光学屏幕200上的和边缘连接的至少部分边缘区域，上述框架100边缘可以指位于框架100上的和边缘连接的至少部分边缘区域。
在一些具体实施例中，当操作人员需要对投影屏幕000进行组装时，首先，可以将转动部300和光学屏幕200均置于框架100的正面a1；然后，将转动部300与光学屏幕200的边缘连接；之后，驱动转动部300相对于框架100进行转动，在转动部300与光学屏幕200连接的端部相对于框架100转动的过程中，能够向光学屏幕200的边缘施加靠近框架100的边缘的作用力，以调整光学屏幕200的张紧度；最后，在转动部300相对于框架100转动至目标位置后与框架100的正面a1连接，以将转动部300固定在框架100上，即能够实现对投影屏幕000中的光学屏幕200的张紧，保证光学屏幕200的正常使用。需要说明的是，在一些具体实施例中可以根据对光学屏幕200的实际张紧需求设置转动部300转动后的目标位置，且不同的目标位置可以用来表征：转动部300相对于框架100的不同转动角度。
在一些具体实施例中，操作人员仅需要将位于框架100正面a1的转动部300与位于框架100正面a1的光学屏幕200的边缘连接，且向转动部300施加一定的作用力后使得转动部300能够相对于框架100转动。且在转动部300转动的过程中能够通过向光学屏幕200施加作用力来将光学屏幕200拉紧，并在转动部300转动至目标位置后与框架100的正面a1连接，以保持恒定的拉紧力，即可完成投影屏幕000的组装。如此，可以降低投影屏幕000的组装难度，有效的简化了投影屏幕000的组装过程，进而可以保证投影屏幕000的组装效率较高。另外，在一些具体实施例中采用转动部300相对于框架100的转动移位实现对光学屏幕200的拉紧，在长时间使用后转动部300并不会产生疲劳现象，使得转动部300对光学屏幕200的作用力保持较好，进而使得对光学屏幕200的张紧效果较好。且光学屏幕200的边缘无需翻折到框架100的背面a2进行连接，使得光学屏幕200的边缘无需直接与框架100接触，避免了框架100对光学屏幕200产生损伤。
请参考图5、图6和图7。在一些具体实施例中，投影屏幕000可以包括：框架100、光学屏幕200和转动部300，转动部300和光学屏幕200均可以装配于框架100上。其中，光学屏幕200贴合在框架100的正面a1，且光学屏幕200的边缘翻折，以使光学屏幕200包裹框架100的边缘。转动部300位于框架100的背面a2。在一些具体实施例中，转动部300在转动至目标位置后可以直接与框架100的背面a2连接。
其中，投影屏幕000中的转动部300被配置为：在相对于框架100转动的过程中，向光学屏幕200施加背离框架100的边缘的作用力。即就是，转动部300在相对于框架100转动的过程中，向光学屏幕200施加背离框架100的边缘的作用力，以使光学屏幕200的边缘朝向远离框架100的边缘的方向移动。
在一些具体实施例中，当操作人员需要对投影屏幕000进行组装时，首先，操作人员可以让光学屏幕200的边缘翻折，以是光学屏幕20包裹框架100的边缘；然后，将转动部300置于框架100的背面a2并且与光学屏幕200的边缘连接；之后，驱动转动部300相对于框架100进行转动，在转动部300中与光学屏幕200连接的端部相对于框架100转动的过程中，能够向光学屏幕200施加背离框架100的边缘的作用力，以调整光学屏幕200的张紧度；最后，在转动部300相对于框架100转动至目标位置后与框架100的背面a2卡接，以将转动部300固定在框架100上，即能够实现对投影屏幕000中的光学屏幕200的张紧，保证光学屏幕200的正常使用。需要说明的是，在一些具体实施例中可以根据对光学屏幕200的实际张紧需求设置转动部300转动后的目标位置，且不同的目标位置可以用来表征：转动部300相对于框架100的 不同转动角度。
在一些具体实施例中，操作人员仅需要将转动部300与光学屏幕200翻折到框架100背面a2的边缘连接，且向转动部300施加一定的作用力使得转动部300能够相对于框架100转动。且在转动部300转动的过程中能够通过向光学屏幕200施加作用力来将光学屏幕200拉紧，并在转动部300转动至目标位置后与框架100的背面a2卡接，以保持恒定的拉紧力，即可完成投影屏幕000的组装。如此，可以使得投影屏幕000的组装难度较低，有效的简化了投影屏幕000的组装过程，进而可以保证投影屏幕000的组装效率较高。另外，通过采用转动部300相对于框架100的转动移位实现对光学屏幕200的拉紧，在长时间使用后转动部300并不会产生疲劳现象，使得转动部300对光学屏幕200的作用力保持较好，进而使得对光学屏幕200的张紧效果较好。
请参考图8和图9。投影屏幕000中的框架100可以包括：相对设置的两个长边框A和相对设置的两个短边框B。其中，在投影屏幕中，与框架100中的长边框A连接的转动部300的个数可以为至少一个，即至少一个转动部300在与光学屏幕200的边缘连接后能够相对于框架100的长边框A转动；与框架100中的短边框B连接的转动部300的个数可以为至少一个，即至少一个转动部300在与光学屏幕200的边缘连接后能够相对于框架100的短边框B转动。在一些具体实施例中，每两个相邻的长边框A和短边框B之间能够采用角铁(图中未示出)进行固定，以将两个长边框A和两个短边框B能够围成一个矩形框架。在一些具体实施例中，框架100还可以包括：至少一个辅助边框F，辅助边框F可以位于两个相对设置的长边框A之间，且辅助边框F的两端可以分别与两个长边框A固定连接。这样，通过辅助边框F能够对框架中的两个长边框A稳定支撑，防止其长期使用后出现下坠变形的不良现象。
在一些具体实施例中，请参考图10。投影屏幕000中的转动部300可以包括：与光学屏幕200的边缘连接的承载件301，以及与该承载件301连接的转动件302，转动件302能够相对于框架100转动。其中，承载件301与光学屏幕200的边缘连接的端部，相对于转动件302相对框架100转动的端部可以更靠近框架100的边缘。承载件301具有与光学屏幕200的边缘连接的第一端部，转动件302具有与框架100转动连接的第二端部，承载件301的第一端部可以位于转动件302的第二端部靠近框架100的边缘的一侧。在这种情况下，通过在转动部300中设置用于连接光学屏幕200的边缘的承载件301，以及与这个承载件301连接的转动件302，且转动件302能够相对于框架100转动。可以在转动件302相对于框架100转动的过程中，带动承载件301也相对于框架100转动，同时承载件301能够向光学屏幕200施加靠近框架100的边缘的作用力，以将光学屏幕200拉紧。需要说明的是，请参考图11。在承载件301相对于框架100转动的过程中，承载件301会带动光学屏幕200的边缘产生水平方向(与框架100的正面平行的方向)的分运动和竖直方向(与框架100的正面垂直的方向)且向框架200靠近的分运动。而在转动部302相对于框架100转动至目标位置后，光学屏幕200的长度将由原来的L1拉伸为L2，且L2的值大于L1的值，使得光学屏幕200被张紧。在一些具体实施例中，转动部300中的转动件302可以为转动板，转动板的长度延伸方向可以与对应连接的边框的长度延伸方向平行，承载件301可以设置在转动件302靠近框架100的边缘的一侧上。
在一些具体实施例中，如图10所示，投影屏幕中的框架100可以包括：相连接的底板100a和侧板100b，转动部300中的转动件302能够相对于底板100a转动，且在转动部300转动至目标位置后，底板100a可以与转动件302连接；和/或，承载件301可以与侧板100b连接。即就是，在转动部300转动至目标位置后，框架100和转动部300之间的连接方式可以包括：底板100a与转动件302连接，承载件301与侧板100b连接，以及，底板100a与转动件302连接，并且承载件301与侧板100b连接的至少一种连接方式。
在一些具体实施例中，在转动部300转动至目标位置后，框架100中的底板100a可以与转动部300中的转动件302连接，以将转动部300与框架100连接固定；或者，在转动部300转动至目标位置后，框架100中的侧板100b可以与转动部300中的承载件301连接，以将转动部300与框架100连接固定；或者，在转动部300转动至目标位置后，框架100中的底板100a可以与转动部300中的转动件302连接，且框架100中的侧板100b可以与转动部300中的承载件301连接，以实现转动部300与框架100的稳定连接。
在一些具体实施例中，框架100中的底板100a上具有第一安装通孔，转动部300中的转动件302上具有与第一安装通孔相对的第二安装通孔，投影屏幕还可以包括固定螺栓，该固定螺栓可以位于第一安装孔和第二安装孔中，框架100中的底板100a可以与转动部300中的转动件302通过固定螺栓进行连接。
在一些具体实施例中，如图10所示，框架100中的底板100a朝向光学屏幕的一侧可以具有第一承载槽100d，转动件302中的至少部分可以位于第一承载槽100d内，且转动件302背离承载件301的端部能够在第一承载槽100d内相对于底板100a转动，也即是，转动件302背离承载件301的端部可以与第一承载槽100d转动连接。在一些具体实施例中，在转动部300转动至目标位置后，框架100和转动部300之间的相对位置包括：承载件301与框架100中侧板100b靠近光学屏幕200的一侧接触，转动件302与第一承载槽100d的底面接触，以及，承载件301与侧板100b靠近光学屏幕200的一侧接触，并且转动件302 与第一承载槽100d的底面接触的至少一种相对位置。在一些具体实施例中，框架100中的侧板100b和底板100a可以相互垂直，转动部300中的承载件301和转动件302可以相互垂直。承载件301的第一端部可以与光学屏幕200连接。承载件301的第二端部可以与转动件302的第一端部固定连接，转动件302的第二端部可以相对与框架100转动。
在一些具体实施例中，请参考图10和图12。投影屏幕000还可以包括：支撑杆400。转动部300中的承载件301可以具有承载腔301a，以及与该承载腔301a连通的开口301b，该开口301b可以位于承载件301靠近光学屏幕200的边缘的一侧。光学屏幕200的边缘可以具有容置兜a1，且该容置兜a1可以具有用于支撑杆400进入的端口。其中，光学屏幕200的边缘可以与支撑杆400连接，也即是，光学屏幕200的边缘包裹框架100的边缘后可以与支撑杆400连接，且支撑杆400可以通过承载件301中的开口301b卡接至承载腔301a内。在这种情况下，支撑杆400与光学屏幕200的边缘连接后可以卡接至承载件301的承载腔301a内，当转动部300相对于框架100转动以撑平光学屏幕200时，承载件301上的承载腔301a能够对支撑杆400起到限位作用，以辅助光学屏幕200拉紧。另外，通过在光学屏幕200的边缘设置容置兜a1，支撑杆400可以通过容置兜a1的端口安装至容置兜a1内。如此，简化了支撑杆400与光学屏幕200的组装过程，且通过容置兜a1能够对支撑杆400起到限位作用。
在一些具体实施例中，如图10和图11所示，投影屏幕000中的框架100的边缘可以具有卡接槽101(即底板100a靠近光学屏幕200的一侧可以具有卡接槽101)，转动件302的第二端部可以位于卡接槽101内，也即是，转动件302相对框架100转动的端部可以伸入至框架100的边缘上的卡接槽101内，且与卡接槽101的内壁抵接。在这种情况下，通过在框架100的边缘设置卡接槽101，转动件302相对于框架100转动的端部可以伸入至卡接槽101内与卡接槽101的内壁抵接。如此，转动件302相对于框架100转动的端部能够在卡接槽101内与卡接槽101的内壁相对滑动，以实现转动部300与框架100之间的相对转动。
在一些具体实施例中，如图10和图11所示，框架100的边缘上的卡接槽101可以具有与光学屏幕200的正面b1平行的第一平面c1，以及与该第一平面c1相邻设置的第二平面c2，第二平面c2相对于第一平面c1更靠近光学屏幕200的正面b1，且卡接槽101中的第一平面c1与第二平面c2之间的夹角可以为锐角。需要说明的是，光学屏幕200的正面b1可以为光学屏幕200中用于正常显示投影画面的一面。在这种情况下，通过设置卡接槽101的第一平面c1与第二平面c2之间的夹角为锐角，转动件302相对于框架100转动的端部伸入至该卡接槽101内。如此，使得转动部300相对于框架100转动的过程中，卡接槽101能够对转动部300中的转动件302起到一定的限位作用，防止转动件302与框架100中的卡接槽101脱离。如图12所示，在一些具体实施例中，转动件302相对于框架100转动的端部可以具有弧形凸面d1，转动件302相对于框架100转动的端部通过该弧形凸面d1与框架100的卡接槽101内壁抵接，保证了转动部300中的转动件302能够相对于框架100顺利的滑动。
在一些具体实施例中，请参考图13和图14。投影屏幕000中的转动部300还可以包括：连接轴303，连接轴303与转动件302相对于框架100转动的端部连接，即就是，连接轴303与转动件302的第二端部连接，该连接轴303可以与框架100的边缘转动连接。在这种情况下，转动部300可以通过连接轴303与框架100的边缘实现转动连接，进一步保证了转动部300与框架100的边缘相对转动时的连接稳定性。如此，可以在转动件302相对于框架100转动的端部设置连接轴303，在框架100的边缘设置连接孔(图中未示出)，连接轴303中的至少部分可以位于连接孔内，通过连接轴与连接孔的配合，实现转动部300相对于框架100的转动。需要说明的是，在其他可能的实现方式中，也可以在转动件相对于框架转动的端部设置连接孔，在框架的边缘处设置连接轴，连接轴与连接孔转动连接。还需要说明的是，也可以采用其他的传动件实现转动件与框架的边缘之间的相对转动，本申请实施例对此不做具体的限定。
在一些具体实施例中，如图13和图14所示，投影屏幕000中的转动部300还可以包括：第一限位件304，第一限位件304与承载件301背离光学屏幕200的边缘一侧固定连接，框架100还包括第二限位件102，框架100中的侧板100b背离底板100a的一侧可以具有第一限位槽100c，第二限位件102可以位于该第一限位槽100c内。其中，在转动部300转动至目标位置后，转动部300中的第一限位件304可以在框架100中的第一限位槽100c内与第二限位件102卡接。在这种情况下，通过在承载件301背离光学屏幕200的边缘一侧设置第一限位件304，且在框架100中的侧板100b上设置第二限位件102。如此，在转动部300相对于框架100转动至目标位置后，即可以通过第一限位件304与第二限位件102的卡接作用方便的实现对转动部300的固定，进而通过承载件301向光学屏幕200施加恒定的拉紧力。
在一些具体实施例中，请参考图15。投影屏幕000中的转动部300可以包括：与光学屏幕200的边缘连接的承载件301，以及与这个承载件301连接的转动件302，该转动件302能够相对于框架100转动。其中，转动件302相对于框架100转动的端部，相对于承载件301与光学屏幕200的边缘连接的端部可以更靠近框架100的边缘。也即是，转动件302具有与框架200转动连接的第二端部，承载件301具有与光学屏幕200的边缘连接的第一端部，转动件302的第二端部位于承载件301的第一端部靠近框架100的边缘的一侧。在这种情况下，通过在转动部300中设置用于连接光学屏幕200的边缘的承载件301，以及与 这个承载件301连接的转动件302，且转动件302能够相对于框架100转动。如此，在转动件302相对于框架100转动的过程中，能够带动承载件301也相对于框架100转动，同时承载件301能够向光学屏幕200施加背离框架100的边缘的作用力，以将光学屏幕200拉紧。
在一些具体实施例中，承载件301的第一端可以与光学屏幕200的边缘连接，承载件301的第二端可以与转动件302的第一端固定连接，转动件302的第二端可以相对于框架转动。例如，承载件301与转动件302相互垂直，以形成折弯结构。
需要说明的是，请参加图16。在承载件301相对于框架100转动的过程中，承载件301会带动光学屏幕200的边缘以相同的方向相对于框架100转动，而承载件301的转动轨迹G1与光学屏幕200的边缘的转动轨迹G2是不同的。在转动部300转动至目标位置后，转动部300带动光学屏幕200的边缘拉伸的距离可以为：L2-L1。
在一些具体实施例中，转动部300中的转动件302可以为转动板，转动板的长度延伸方向可以与对应连接的边框的长度延伸方向平行，承载件301可以设置在转动件302靠近光学屏幕200的边缘的一侧上。
在一些具体实施例中，如图15和图16所示，投影屏幕000中的框架100的边缘可以具有卡接槽101，转动件302的第二端部位于卡接槽101内，转动件302相对于框架100转动的端部可以伸入至卡接槽101，且与卡接槽101的内壁抵接。在这种情况下，通过在框架100的边缘设置卡接槽101，转动件302相对于框架100转动的端部可以伸入至卡接槽101内与卡接槽101的内壁抵接。如此，转动件302相对于框架100转动的端部能够在卡接槽101内与卡接槽101的内壁相对滑动，以实现转动部300与框架100之间的相对转动。
在一些具体实施例中，如图15所示，框架100的边缘上的卡接槽101可以具有与光学屏幕200的正面b1平行的第一平面c1，以及与该第一平面c1相邻设置的第二平面c2，第一平面c1相对于第二平面c2更靠近光学屏幕200的正面b1，且卡接槽101中的第一平面c1与第二平面c2之间的夹角可以为锐角。需要说明的是，光学屏幕200的正面b1可以为光学屏幕200中用于正常显示投影画面的一面。在这种情况下，通过设置卡接槽101的第一平面c1与第二平面c2之间的夹角为锐角，转动件302相对于框架100转动的端部伸入至该卡接槽101内。如此，使得转动部300相对于框架100转动的过程中，卡接槽101能够对转动部300中的转动件302起到一定的限位作用，防止转动件302与框架100中的卡接槽101脱离。在一些具体实施例中，如图12所示，转动件302相对于框架100转动的端部可以具有弧形凸面d1，转动件302相对于框架100转动的端部通过该弧形凸面d1与框架100的卡接槽101内壁抵接，保证了转动部300中的转动件302能够相对于框架100顺利的滑动。
在一些具体实施例中，请参考图17和图18。投影屏幕000中的转动部300还可以包括：连接轴303，连接轴303与转动件302的第二端部连接，即就是，连接轴303与转动件302相对于框架100转动的端部连接，该连接轴303可以与框架100的边缘转动连接。在这种情况下，转动部300可以通过连接轴303与框架100的边缘实现转动连接，进一步保证了转动部300与框架100的边缘相对转动时的连接稳定性。在一些具体实施例中，可以在与转动件302相对于框架100转动的端部设置连接轴303，在框架100的边缘设置连接孔(图中未示出)，连接轴303中的至少部分可以位于连接孔内，通过连接轴与连接孔的配合，实现转动部300相对于框架100的转动。需要说明的是，在其他可能的实现方式中，也可以在与转动件302相对于框架100转动的端部开设连接孔，在框架的边缘处设置连接轴，连接轴与连接孔转动连接。还需要说明的是，也可以采用其他的传动件实现转动件与框架的边缘之间的相对转动，本申请实施例对此不做具体的限定。
在一些具体实施例中，如图17和图18所示，框架100的背面可以具有第二承载槽100e，转动部300中的至少部分可以位于第二承载槽100e内，且转动件302背离承载件301的端部与第二承载槽100e转动连接，转动部300能够在第二承载槽100e内相对于框架100转动。这样，在转动部300转动至目标位置后，转动部300中的转动件302可以与第二承载槽100e的底面接触，对转动部300起到支撑作用。另外，第二承载槽100e能够对转动部300进行容纳，使得组装后的投影屏幕的整体厚度较小。
在一些具体实施例中，如图17和图18所示，投影屏幕中的框架100还可以具有导向件100f和连接件100g，导向件100f和连接件100g分别位于第二承载槽100e的两侧，且导向件100f位于连接件100g靠近框架的边缘的一侧；导向件100f可以相对与连接件100g更靠近框架100的边缘。其中，导向件100f可以用于在光学屏幕200的边缘翻折的过程中与光学屏幕200接触；连接件100g可以用于与转动至目标位置的转动部302连接。这样，设置导向件100f能够使得光学屏幕200在翻折的过程中支撑光学屏幕200，防止框架100对光学屏幕200损伤。在一些具体实施例中，如图26所示，框架100的边缘中与光学屏幕200接触的一面中的至少部分可以为弧形凸面103，弧形凸面103朝向光学屏幕200突起。在这种情况下，通过设置框架100的边缘中与光学屏幕200接触的一面中的至少部分为弧形凸面103。如此，在光学屏幕200的边缘翻折以包裹框架100的边缘后，框架100的边缘能够对光学屏幕200的边缘进行良好的支撑，基本不会对光学屏幕200的边缘产生损伤。
在一些具体实施例中，如图17和图18所示，投影屏幕000中的转动部300还可以具有第一限位件304，框架100还可以具有第二限位件102；框架100上的连接件100g可以具有第二限位槽100h，第二限位件102可以位于该第二限位槽100h内。其中，转动部300中的第一限位件304可以与框架100中的第二限位件102卡接。在一些具体实施例中，第一限位件304可以设置在承载件301背离光学屏幕200的边缘的一侧。在这种情况下，通过在转动部300中设置第一限位件304，且在框架100中的连接件100g上设置第二限位槽100h，以及位于第二限位槽100h内的第二限位件102。如此，在转动部300相对于框架100转动至目标位置后，即可以通过第一限位件304在第二限位槽100h内与第二限位件102的卡接作用方便的实现对转动部300的固定，进而通过承载件301向光学屏幕200施加恒定的拉紧力。
在一些具体实施例中，请参考图13、图17和图19。转动部300中的第一限位件304和框架100中的第二限位件102中的一个可以包括弹性凸起部102a，该弹性凸起部102a可以用于与第一限位件304和第二限位件102中的另一个卡接。在一些具体实施例中，转动部300中的第一限位件304可以包括弹性凸起部102a，该弹性凸起部102a可以用于与框架100中的第二限位件102卡接；或者，框架100中的第二限位件102可以包括弹性凸起部102a，该弹性凸起部102a可以用于与转动部300中的第一限位件304卡接。需要说明的是，在一些具体实施例中是以框架100中的第二限位件102包括弹性凸起部102a，以与转动部300中的第一限位件304卡接为例进行示意性说明的。这样，通过在框架100的背面设置弹性凸起部102a，转动部300在相对于框架100转动至目标位置后，转动部300中的第一限位件304即可以与框架100上的弹性凸起部102a卡接，进而方便的实现了对转动部300的卡接固定。
在一些具体实施例中，请参考图20。可以在承载件301上设置螺纹孔e1，第一限位件可以为销钉或者螺钉，第一限位件可以通过螺纹孔e1与承载件301固定连接。
在一些具体实施例中，请参考图21和图22，图21中所示的第一限位件304和第二限位件102可以为图13中的第一限位件304和第二限位件102的卡接示意图，图22中所示的第一限位件304和第二限位件102可以为图17中的第一限位件304和第二限位件102的卡接示意图。框架100中的第二限位件102可以具有导向槽102b。弹性凸起部102a可以包括：弹性元件C和凸起件D，该弹性元件C可以位于框架100中的导向槽102b内，凸起件D中的部分可以位于导向槽102b内，部分可以位于导向槽102b外。且弹性元件C可以分布在导向槽102b的底部(该导向槽的底部可以为导向槽中与位于导向槽内的凸起件相对的一侧)和凸起件D之间，且可以分别与导向槽102b的底部和凸起件D连接。在这种情况下，在转动部300转动至目标位置后，转动部300中的第一限位件304可以与弹性凸起部102a中的凸起件D卡接，进而实现对第一限定件304的限位。另外，导向槽102b能够对凸起件D的移动起到一定的导向作用，降低了凸起件D与第一限位件304接触时产生错位的概率，保证了凸起件D对第一限位件304的限位作用。
在一些具体实施例中，请参考图23。转动部300中的第一限位件304可以具有与弹性凸起部102a中的凸起件D配合的第三限位槽e2。或者，如图22所示，在转动部300转动至目标位置后，凸起件D可以与第一限位件304靠近光学屏幕200的正面b1的一侧卡接。在一些具体实施例中，第二限位件102可以包括两个相对设置的弹性凸起部102a，对应的导向槽102b的个数可以为两个。通过两个相对设置的弹性凸起部102a能够进一步保证与第一限位件304之间的卡接效果。
在一些具体实施例中，当转动部300中的第一限位件304具有与弹性凸起部102a中的凸起件D配合的第三限位槽e2时，转动部300相对于框架100转动至目标位置，即第二限位件102中的导向槽102b与第一限位件304中的第三限位槽e2可以连通；凸起件D在弹性元件C的弹力作用下能够向远离导向槽102b的底部的方向移动，以使凸起件D中的部分能够位于第一限位件304中的第三限位槽e2内，即可以实现第一限位件304与第二限位件102的卡接。
在一些具体实施例中，在转动部300相对于框架100转动至目标位置后，凸起件D能够与第一限位件304靠近光学屏幕200的正面b1的一侧卡接，即凸起件D此时能够对第一限位件304进行限位，防止第一限位件304向靠近光学屏幕200的正面b1的方向转动。例如，弹性凸起部102a中的凸起件D可以为部分位于导向槽102b内，部分位于导向槽102b外的限位球体。弹性凸起部102a中的弹性元件C可以为位于导向槽102b的底部与凸起件D之间的压缩弹簧。
在一些具体实施例中，请参考图24。投影屏幕000中的光学屏幕200可以包括：柔性支撑层201和多个光学层202，该柔性支撑层201的边缘翻折，以使得柔性支撑层201包裹框架100的边缘，且多个光学层202中的至少部分光学层可以位于柔性支撑层201靠近框架100的一侧。这样，可以直接将光学屏幕200中的柔性支撑层201固定于框架100上，而不需要通过合成布固定于框架上，从而降低了投影屏幕000的结构复杂性，且消除了合成布与膜片(图中未示出)之间因为膨胀收缩差异带来的投影图像波浪畸变现象。另外，柔性支撑层201还可以作为其他光学层制作时的基底。需要说明的是，在一些具体实施例中的光学屏幕也可以采用合成布上粘接膜片的方式形成，将合成布的边缘翻折，以使合成布包裹框架的边缘。
在一些具体实施例中，请参考图25。投影屏幕000还可以包括：与框架100连接的辅助框体500，该辅助框体500可以包括：第一片状结构501和第二片状结构502，第一片状结构501的一侧可以与第二片 状结构502的一侧固定连接，即就是，第一片状结构501的部分边缘与第二片状结构502的一面固定连接。其中，第一片状结构501在垂直于光学屏幕200的正面的方向(例如，图中的Y轴方向)上可以位于转动部300背离框架100的一侧。第二片状结构502在平行于光学屏幕200的正面的方向(例如，图中的X轴方向)上可以位于框架100背离转动部300的一侧。在这种情况下，通过辅助框体500中的第一片状结构501能够对框架100的正面进行装饰，第二片状结构502能够对框架100的侧面进行装饰，使得用户从框架100的正面观看时，仅能够看到投影屏幕000中的光学屏幕200和辅助框体500，使得框架100的正面的外观效果较好。
在一些具体实施例中，如图26所示，投影屏幕000中的辅助框体500还可以包括：与第二片状结构502背离第一片状结构501的一侧固定连接的第三片状结构503，该第三片状结构503可以位于框架100的背面。其中，第三片状结构503可以与框架100连接；或者，在转动部300转动至目标位置后，第三片状结构503可以同时与框架100和转动部300(例如转动部中的转动件)连接。在这种情况下，为了使得投影屏幕000的侧面具有更好的外观效果，可以在辅助框体500中设置第三片状结构503，该第三片状结构503可以位于框架100的背面以与框架100连接，以将辅助框体500与框架100连接。
在一些具体实施例中，请参加图27。投影屏幕000中的光学屏幕200可以包括：柔性支撑层201和多个光学层202，该柔性支撑层201的边缘可以与转动部300连接。其中，在垂直于光学屏幕200的正面的方向上，辅助框体500中的第一片状结构501可以至少覆盖柔性支撑层201中与转动部300连接的部分，且第一片状结构501可以与多个光学层202中的至少部分光学层错开。在这种情况下，通过辅助框体500中的第一片状结构501可以对柔性支撑层201中与转动部300连接的部分进行覆盖，且第一片状结构501可以与多个光学层202中的至少部分光学层错开。如此，第一片状结构501对框架100的正面装饰的同时，能够使得光学屏幕200中用于显示投影画面的光学层202的显示面积最大。
在一些具体实施例中，请参考图24和图27，多个光学层202中的至少部分光学层可以位于柔性支撑层201靠近框架100的一侧。这样，通过柔性支撑层201能够对多个光学层中的至少部分光学层进行保护。光学屏幕200中的多个光学层202可以包括：位于柔性支撑层201背离框架100的一侧的表面抗光层202a，以及位于柔性支撑层201靠近框架100的一侧层叠设置的第一胶层202b、着色层202c、第二胶层202d、基材层202e、菲涅尔透镜层202f和反射层202g。着色层202c可以通过第一胶层202b粘接至柔性支撑层201靠近框架100的一面；基材层202e可以通过第二胶层202d粘接至着色层202c靠近框架100的一面；菲涅尔透镜层202f和反射层202g可以形成于基材层202e靠近框架100的一面上。光线可以从抗光表面层202a一侧射入，透射其他膜层后最终被反射层202g反射后，再由抗光表面层202a射入用户眼中。在一些具体实施例中，第一胶层202b和第二胶层202d均可以由光学透明胶形成。例如，光学透明胶可以为UV胶。基材层202e的材质可以与柔性支撑层201的材质相同，此处不再赘述。
在一些具体实施例中，柔性支撑层201可以为由聚氨基甲酸酯(英文：Polyurethane；简称：PU)材料制成PU柔性支撑层。PU具有柔性可以任意卷曲不变形，同时具有耐磨、耐高温、韧性高、耐油、机械性能强等优点，使用PU制成PU柔性支撑层，使得柔性支撑层具有柔性而可以实现卷曲。在其他一些实施例中，柔性支撑层也可以由其他柔性材料制成，例如，可以由热塑性聚氨酯弹性体橡胶(英文：Thermoplastic polyurethanes；简称：TPU)材料制成TPU柔性支撑层，TPU具有弹性可实现卷曲，使用TPU制成TPU柔性支撑层，同样可以使得柔性支撑层具有柔性而可以实现卷曲。或者，柔性支撑层201还可以由聚对苯二甲酸类塑料(英文：Polyethylene terephthalate；简称：PET)、苯乙烯系热塑性弹性体，又称苯乙烯系嵌段共聚物(英文：Styrenic Block Copolymers简称：SBC)等柔性材料制成，均可以使柔性支撑层具有柔性且可卷曲。基材层202e的材质可以与柔性支撑层201的材质相同，此处不再赘述。在一些具体实施例中，第一片状结构501可以覆盖柔性支撑层201中与转动部300连接的部分和抗光表面层202a与柔性支撑层201的边缘连接的部分。
在一些具体实施例中，为了提高该光学屏幕扩散光线的效果，抗光表面层202a中还设有扩散粒子202h，该扩散粒子202h的材质可以为PMMA。如此，光线在进入抗光表面层202a和射出抗光表面层202a的过程中，可以被扩散粒子202h扩散开，从而提高了该光学屏幕200的观看视角。需要说明的是，在其他可能的实现方式中，抗光表面层202a中也可以不设置扩散粒子，扩散粒子可以设置在柔性支撑层、基材层、着色层、胶层及菲涅尔透镜层。或者，该光学屏幕中还可以设置专门的扩散层(图中未示出)，扩散层具有扩散基底层，扩散基底层内分布有扩散粒子。
光学屏幕200中的着色层202c可以包括着色基底层，以及设置在着色基底层中的暗色染料(图中未示出)。需要说明的是，在设置着色层的情况下，就不需要在抗光表面层、柔性支撑层、菲涅尔透镜层及反射层中设置暗色染料了，以防光线的能量被吸收较多而降低光学屏幕的亮度。
需要说明的是，在其他可能的实现方式中，请参考图28。光学屏幕200中的柔性支撑层201可以为合成布201b，光学层202可以为贴合在合成布201b背离框架一侧的膜片。转动部300可以与合成布201b的边缘连接，第一片状结构501能够覆盖合成布201b中与转动部300连接的部分，且第一片状结构501能 够与膜片错开排布。
在一些具体实施例中，如图27和图28所示，辅助框体500中的第一片状结构501背离第二片状结构502的一侧e3可以与多个光学层202中的至少部分光学层的侧面e4齐平。在这种情况下，通过设置第一片状结构501背离第二片状结构502的一侧e3与多个光学层202中的至少部分光学层的侧面e4齐平。如此，便于投影屏幕000的窄边框设计，且能够保证光学层202具有最大的显示面积。在一些具体实施例中，当柔性支撑层201为合成布201b时，第一片状结构501背离第二片状结构502的一侧e3可以与膜片的侧面齐平；当柔性支撑层201为PU或PET等材质制成的支撑层时，第一片状结构501背离第二片状结构502的一侧e3可以与第一胶层202b、着色层202c、第二胶层202d、基材层202e、菲涅尔透镜层202f以及反射层202g的侧面齐平。
综上所述，本申请实施例提供了一种投影屏幕，可以包括：框架、光学屏幕和转动部。在对投影屏幕组装时，操作人员仅需要将转动部与光学屏幕的边缘连接，且向转动部施加一定的作用力使得转动部能够相对于框架转动，转动部在相对于框架转动的过程中，能够通过向光学屏幕的边缘施加的作用力将光学屏幕拉紧，并在转动部转动至目标位置后与框架固定连接，以保持恒定的拉紧力，能够向光学屏幕施加张紧作用力，即可完成投影屏幕的组装。如此，可以降低投影屏幕的组装难度，有效的简化了投影屏幕的组装过程，进而可以保证投影屏幕的组装效率较高。
另外，如此可以使得光学屏幕的正面平坦性较好，以保证在光学屏幕上呈现的投影画面的显示效果较好。另外，通过采用转动部相对于框架的转动移位实现对光学屏幕的拉紧，在长时间使用后转动部并不会产生疲劳现象，使得转动部对光学屏幕的作用力保持较好，进而使得对光学屏幕的张紧效果较好。
本申请实施例还提供了一种激光投影系统，该激光投影系统可以为超短焦激光投影系统。在一些具体实施例中，请参考图29。激光投影系统可以包括：投影屏幕000和激光投影设备001。投影屏幕000可以为上述实施例中任一示出的投影屏幕。
如此，在激光投影设备001工作时，激光投影设备001不仅可以斜向上的发射光线，使得激光投影设备001可以向投影屏幕000投射画面。
在本申请中，术语“第一”、“第二”和“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
以上所述仅为本申请的可选的实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (21)

  1. 一种投影屏幕，包括：框架、光学屏幕和转动部；
    所述框架具有相对的正面和背面，所述光学屏幕的至少部分位于所述框架的正面；
    所述转动部装配于所述框架上，且与所述光学屏幕的边缘连接，所述转动部能够相对于所述框架转动，且所述转动部在转动至目标位置后与所述框架固定连接；
    其中，所述转动部被配置为：在相对于所述框架转动的过程中，向所述光学屏幕施加张紧作用力。
  2. 根据权利要求1所述的投影屏幕，所述光学屏幕和所述转动部均位于所述框架的正面；
    所述转动部被配置为：在相对于所述框架转动的过程中，向所述光学屏幕施加朝向所述框架的边缘的作用力，以使所述光学屏幕的边缘朝向靠近所述框架的边缘的方向移动。
  3. 根据权利要求2所述的投影屏幕，所述转动部包括：与所述光学屏幕的边缘连接的承载件，以及与所述承载件连接的转动件，所述转动件能够相对于所述框架转动；
    其中，所述承载件具有与所述光学屏幕的边缘连接的第一端部，所述转动件具有与所述框架转动连接的第二端部，所述第一端部位于所述第二端部靠近所述框架的边缘的一侧。
  4. 根据权利要求1所述的投影屏幕，所述光学屏幕贴合在所述框架的正面，且所述光学屏幕的边缘翻折，以使所述光学屏幕包裹所述框架的边缘；
    所述转动部位于所述框架的背面；
    所述转动部被配置为：在相对于所述框架转动的过程中，向所述光学屏幕施加背离所述框架的边缘的作用力，以使所述光学屏幕的边缘朝向远离所述框架的边缘的方向移动。
  5. 根据权利要求4所述的投影屏幕，所述转动部包括：与所述光学屏幕的边缘连接的承载件，以及与所述承载件连接的转动件，所述转动件能够相对于所述框架转动；
    其中，所述转动件具有与所述框架转动连接的第二端部，所述承载件具有与所述光学屏幕的边缘连接的第一端部，所述第二端部位于所述第一端部靠近所述框架的边缘的一侧。
  6. 根据权利要求3所述的投影屏幕，所述框架包括：相连接的底板和侧板，所述转动件能够相对于所述底板转动，且在所述转动部转动至所述目标位置后，所述框架和所述转动部之间的连接方式包括：所述底板与所述转动件连接，所述承载件与所述侧板连接，以及，所述底板与所述转动件连接，并且所述承载件与所述侧板连接的至少一种连接方式。
  7. 根据权利要求6所述的投影屏幕，所述侧板背离所述底板的一侧具有第一限位槽；
    所述转动部还包括：第一限位件，所述第一限位件与所述承载件背离所述光学屏幕的边缘一侧固定连接；
    所述框架还包括第二限位件，所述第二限位件位于所述第一限位槽内；
    其中，在所述转动部转动至所述目标位置后，所述第一限位件在所述第一限位槽内与所述第二限位件卡接。
  8. 根据权利要求6所述的投影屏幕，所述底板朝向所述光学屏幕的一侧具有第一承载槽，所述转动件中的至少部分位于所述第一承载槽内，且所述转动件背离所述承载件的端部与所述第一承载槽转动连接。
  9. 根据权利要求8所述的投影屏幕，在所述转动部转动至所述目标位置后，所述框架和所述转动部之间的相对位置包括：所述承载件与所述侧板靠近所述光学屏幕的一侧接触，所述转动件与所述第一承载槽的底面接触，以及，所述承载件与所述侧板靠近所述光学屏幕的一侧接触，并且所述转动件与所述第一承载槽的底面接触的至少一种相对位置。
  10. 根据权利要求2、3和6-9任一所述的投影屏幕，所述投影屏幕还包括：辅助框体，所述辅助框体与所述框架连接；
    所述辅助框体包括：第一片状结构和第二片状结构，所述第一片状结构在垂直于所述光学屏幕的正面的方向上位于所述转动部背离所述框架的一侧；
    所述第二片状结构在平行于所述光学屏幕的正面的方向上位于所述框架背离所述转动部的一侧；
    其中，所述第一片状结构的部分边缘与所述第二片状结构的一面固定连接。
  11. 根据权利要求10所述的投影屏幕，所述辅助框体还包括：第三片状结构，所述第三片状结构位于所述框架的背面，所述第三片状结构与所述第二片状结构背离所述第一片状结构的一侧固定连接；
    其中，所述第三片状结构与所述框架连接，或者，在所述转动部转动至目标位置后，所述第三片状结构同时与所述框架和所述转动部连接。
  12. 根据权利要求10所述的投影屏幕，所述光学屏幕包括：柔性支撑层和多个光学层，所述多个光学层中的至少部分光学层位于所述柔性支撑层靠近所述框架的一侧，所述柔性支撑层的边缘与所述转动部连接；
    其中，在垂直于所述光学屏幕的正面的方向上，所述第一片状结构至少覆盖所述柔性支撑层中与所述转动部连接的部分，且所述第一片状结构与所述多个光学层中的至少部分光学层错开。
  13. 根据权利要求5所述的投影屏幕，所述框架的背面具有第二承载槽，所述转动部中的至少部分位于所述第二承载槽内，且所述转动件背离所述承载件的端部与所述第二承载槽转动连接。
  14. 根据权利要求13所述的投影屏幕，所述框架还具有导向件和连接件，所述导向件和所述连接件分别位于所述第二承载槽的两侧，且所述导向件位于所述连接件靠近所述框架的边缘的一侧；
    其中，所述导向件用于在所述光学屏幕的边缘翻折的过程中与所述光学屏幕接触，所述连接件用于与转动至所述目标位置的所述转动部连接。
  15. 根据权利要求14所述的投影屏幕，所述导向件与所述光学屏幕接触的一面中的至少部分为弧形凸面，所述弧形凸面朝向所述光学屏幕突起。
  16. 根据权利要求14所述的投影屏幕，所述连接件背离所述光学屏幕的正面的一侧具有第二限位槽，
    所述转动部还包括第一限位件，所述第一限位件与所述承载件背离所述光学屏幕的边缘一侧固定连接；
    所述框架还包括第二限位件，所述第二限位件位于所述第二限位槽内；
    其中，在所述转动部转动至所述目标位置后，所述第一限位件在所述第二限位槽内与所述第二限位件卡接。
  17. 根据权利要求3或者5所述的投影屏幕，所述框架的边缘具有卡接槽，所述转动件的第二端部位于所述卡接槽内，且与所述卡接槽的内壁抵接。
  18. 根据权利要求16所述的投影屏幕，所述卡接槽具有连接的第一平面和第二平面，所述第一平面与所述光学屏幕的正面平行，所述第一平面与所述第二平面之间的夹角为锐角。
  19. 根据权利要求3或者5所述的投影屏幕，所述转动部还包括：连接轴，所述连接轴与所述转动件的第二端部连接，且所述连接轴与所述框架的边缘转动连接。
  20. 根据权利要求10-14任一所述的投影屏幕，所述光学屏幕包括：柔性支撑层和多个光学层，所述柔性支撑层的边缘翻折，以使所述柔性支撑层包裹所述框架的边缘；
    所述多个光学层中的至少部分光学层位于所述柔性支撑层靠近所述框架的一侧。
  21. 一种激光投影系统，所述激光投影系统包括：投影屏幕和激光投影设备，所述激光投影设备用于向所述投影屏幕投射画面，所述投影屏幕包括权利要求1-20任一所述的投影屏幕。
PCT/CN2024/079454 2023-06-16 2024-02-29 投影屏幕和激光投影系统 Ceased WO2024255323A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080285126A1 (en) * 2005-04-13 2008-11-20 Homescreens.Com.Au Pty Limited Screen Surround
US20100276091A1 (en) * 2006-07-13 2010-11-04 Niswonger John O H Apparatus and method for screen tensioning
CN108873587A (zh) * 2018-08-27 2018-11-23 广州市加影视听设备有限公司 一种多档位投影幕布拉紧机构
CN215932355U (zh) * 2021-10-14 2022-03-01 青岛海信激光显示股份有限公司 投影屏幕
CN217739707U (zh) * 2022-07-29 2022-11-04 青岛海信激光显示股份有限公司 投影屏幕
CN116719204A (zh) * 2023-06-16 2023-09-08 青岛海信激光显示股份有限公司 投影屏幕
CN116719203A (zh) * 2023-06-16 2023-09-08 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
US20080285126A1 (en) * 2005-04-13 2008-11-20 Homescreens.Com.Au Pty Limited Screen Surround
US20100276091A1 (en) * 2006-07-13 2010-11-04 Niswonger John O H Apparatus and method for screen tensioning
CN108873587A (zh) * 2018-08-27 2018-11-23 广州市加影视听设备有限公司 一种多档位投影幕布拉紧机构
CN215932355U (zh) * 2021-10-14 2022-03-01 青岛海信激光显示股份有限公司 投影屏幕
CN217739707U (zh) * 2022-07-29 2022-11-04 青岛海信激光显示股份有限公司 投影屏幕
CN116719204A (zh) * 2023-06-16 2023-09-08 青岛海信激光显示股份有限公司 投影屏幕
CN116719203A (zh) * 2023-06-16 2023-09-08 青岛海信激光显示股份有限公司 投影屏幕

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