CN215932356U

CN215932356U - Projection screen

Info

Publication number: CN215932356U
Application number: CN202122472459.XU
Authority: CN
Inventors: 代琪; 李建军; 杨长明
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-01
Anticipated expiration: 2031-10-14

Abstract

The application discloses projection screen belongs to projection technical field. The projection screen includes: a frame, a flexible carrier, and a curtain. The frame includes a frame body and a projection structure. Because the side that is close to the frame body in the holding surface of protruding structure is located between curtain and the frame body, when the curtain takes place the thermal expansion phenomenon, the edge part of curtain can be earlier with the side contact of holding surface, then the edge part of curtain can slide on the holding surface along the direction that deviates from the frame body. Therefore, the side surface of the curtain sheet can not be in contact with the frame, and the bad phenomenon of bulging at the edge of the curtain sheet can be effectively avoided. When the curtain sheet is subjected to cold contraction, the edge part of the curtain sheet is not contacted with the frame, namely, the edge part of the curtain sheet can be normally contracted on the flexible carrier. Thereby effectively avoiding the bad phenomenon of degumming at the edge part of the curtain sheet.

Description

Projection screen

Technical Field

The application relates to the technical field of projection, in particular to a projection screen.

Background

With the continuous development of science and technology, projection devices are increasingly applied to the work and life of consumers. At present, a projection device mainly comprises a projection host and a projection screen. The light outlet of the projection host faces the projection screen to emit light beams to the projection screen, and the projection screen is used for receiving the light beams to realize the display of pictures.

Projection screens generally include: a flexible curtain and a frame. Wherein, flexible curtain can include: flexible supports (e.g., synthetic sheets), curtains, and adhesive films. The curtain piece can bond in one side of flexible carrier through the glued membrane, and the edge of flexible carrier stretches out four sides of curtain piece, and the opposite side of flexible carrier can laminate in the front of frame, and the edge of flexible carrier turns over the edge of turning over in order to wrap up the frame. In this manner, the flexible curtain can be secured to the frame.

However, after the screen is bonded to the flexible carrier, the screen is easily expanded with heat and contracted with cold, which causes the edge of the screen to be easily degummed or bulged, and further causes the display effect of the projection image displayed on the projection screen in the edge area to be poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen. The problem that the display effect of a projection picture displayed on a projection screen in the prior art in an edge area is poor can be solved, and the technical scheme is as follows:

there is provided a projection screen comprising:

a frame, a flexible carrier, and a curtain;

the frame includes: the frame comprises a frame body and a protruding structure fixedly connected with the first side of the frame body, wherein a through groove is formed between the protruding structure and the frame body;

the flexible carrier is attached to the front face of the frame body, and the edge part of the flexible carrier penetrates through the through groove and then is connected with the second side of the frame body;

the curtain sheet is connected with one surface of the flexible carrier, which is far away from the frame body;

the protruding structure is provided with a supporting surface which is arranged on the same side with the front side of the frame body, and the supporting surface is close to the side edge of the frame body and is positioned between the curtain sheet and the frame body in the direction perpendicular to the curtain sheet.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

a projection screen, comprising: a frame, a flexible carrier, and a curtain. The frame includes frame body and protruding structure, and the curtain piece is fixed in the one side that the frame body was kept away from to flexible carrier, and the another side laminating of flexible body is in the front of frame body. Because the side that is close to the frame body in the holding surface of protruding structure is located between curtain and the frame body, when the curtain takes place the thermal expansion phenomenon, the edge part of curtain can be earlier with the side contact of holding surface, then the edge part of curtain can slide on the holding surface along the direction that deviates from the frame body. Therefore, the side surface of the curtain sheet can not be in contact with the frame, and the bad phenomenon of bulging at the edge of the curtain sheet can be effectively avoided. When the curtain sheet is subjected to cold contraction, the edge part of the curtain sheet is not contacted with the frame, namely, the edge part of the curtain sheet can be normally contracted on the flexible carrier. Thereby effectively avoiding the bad phenomenon of degumming at the edge part of the curtain sheet.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic partial structure diagram of a projection screen provided in the related art;

FIG. 2 is a diagram illustrating the effect of the phenomenon of de-bonding of the screen in the projection screen shown in FIG. 1;

FIG. 3 is a diagram illustrating the effect of the curtain from bulging in the projection screen shown in FIG. 1;

fig. 4 is a schematic partial structural diagram of a projection screen according to an embodiment of the present disclosure;

FIG. 5 is an enlarged partial schematic view of FIG. 4 at A';

FIG. 6 is a diagram of the effect of the projection screen shown in FIG. 4 when the screen is inflated;

FIG. 7 is a schematic diagram illustrating a partial structure of another projection screen provided in an embodiment of the present application;

FIG. 8 is an enlarged partial schematic view of FIG. 7 at B';

FIG. 9 is a diagram of the effect of the projection screen shown in FIG. 7 when the screen is inflated;

FIG. 10 is a schematic structural diagram of a frame according to an embodiment of the present disclosure;

fig. 11 is an enlarged partial schematic view at C' of fig. 10.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In the related art, please refer to fig. 1, in which fig. 1 is a schematic diagram illustrating a partial structure of a projection screen provided in the related art. Projection screen 00 generally includes: a flexible curtain 10, a first frame 20, and a second frame 30. The first frame 20 may be generally referred to as an inner frame, and the second frame 30 may be generally referred to as an outer frame.

The flexible curtain 10 may include: a flexible carrier 11 (e.g. a synthetic cloth), a curtain sheet 12 and an adhesive film 13. The curtain sheet 12 may be adhered to one side of the flexible carrier 11 by an adhesive film 13, and the edge of the flexible carrier 11 extends out of four sides of the curtain sheet 12. The other side of the flexible carrier 11 may be attached to the front surface of the first frame 20, and the edge portion of the flexible carrier 11 is folded to wrap the edge of the first frame 20. In this manner, the flexible curtain 10 can be secured to the first frame 20.

The second frame 30 may include: a fixing piece 31 and a shielding piece 32 connected to each other. Wherein, the fixing sheet 31 can be fixedly connected with the back surface of the first frame 20, and the shielding sheet 32 can cover the edge portion of the curtain sheet 12 in the flexible curtain 10.

However, after the screen 12 is bonded to the flexible carrier 11, the screen 12 is likely to expand with heat and contract with cold, which causes the edge of the screen to be easily degummed or bulge.

For example, referring to fig. 2, fig. 2 is a diagram illustrating the effect of the phenomenon of de-bonding of the screen in the projection screen shown in fig. 1. When the curtain sheet 12 is shrunk due to cooling, the edge portion of the curtain sheet 12 is easily separated from the shielding sheet 32 of the second frame 30. After the curtain sheet 12 is separated from the shielding sheet 32, the side surface of the curtain sheet 12 is easily contacted with the side surface of the shielding sheet 32, and at this time, if the curtain sheet 12 expands due to heat, the curtain sheet 12 does not expand into the shielding sheet 32, but expands out of the shielding sheet 32. Thus, the part of the curtain sheet 12 that is pulled out from the shielding sheet 32 cannot re-enter the shielding sheet 32 by expansion, but contacts the side of the shielding sheet 32 away from the flexible carrier 11, and the part of the curtain sheet 12 that is pulled out from the shielding sheet 32 is supported by the shielding sheet 32. Thus, the horizontal distance between the area of the curtain sheet 12 in contact with the shielding sheet 32 and the flexible carrier 11 is L1, which is much larger than the thickness of the curtain sheet 12, resulting in a large moment applied to the area of the curtain sheet 12 in contact with the shielding sheet 32, and further causing the edge of the curtain sheet 12 to be easily degummed.

Referring to fig. 3, fig. 3 is a diagram illustrating the effect of the curtain sheet of the projection screen shown in fig. 1 being bulged. When the curtain sheet 12 expands due to heat, the side of the curtain sheet 12 contacts the inner side of the second frame 30 facing the curtain sheet 12, which causes the edge of the curtain sheet 12 to bulge.

In the projection screen 00, the poor display effect of the projection image displayed on the screen 12 in the edge area is poor regardless of the poor phenomenon that the screen 12 is degummed or the poor phenomenon that the screen 12 is swelled.

Referring to fig. 4 and fig. 5, fig. 4 is a schematic partial structure diagram of a projection screen according to an embodiment of the present application, and fig. 5 is a schematic partial enlarged view of fig. 4 at a'. Projection screen 000 may include: a frame 100, a flexible carrier 200, and a curtain 300.

The frame 100 in the projection screen 000 may include: a frame body 101 and a raised structure 102. Wherein, the protruding structure 102 may be fixedly connected with the first side a of the frame body 101, and a through slot 103 may be provided between the protruding structure 102 and the frame body 101.

One side of the flexible carrier 200 may be attached to the front surface of the frame body 101, and an edge portion of the flexible carrier 200 may be movably connected to the second side B of the frame body 101 after passing through the through slot 103. The first side a and the second side B of the frame body 101 may be two sides of the frame body 101, which are opposite to each other, the first side a may be an outer side of the frame body 101, and the second side B may be an inner side of the frame body 101.

The curtain sheet 300 in the projection screen 000 may be fixed on the other side of the flexible carrier 200, that is, the curtain sheet 300 may be fixed on the side of the flexible carrier 200 away from the frame body 101. And edge portions of the flexible carrier 200 may extend beyond the four side edges of the curtain sheet 300. The screen 300 may be an optical film, and the optical film is used in cooperation with a projection host. The projection host is used for emitting light beams to the optical diaphragm, and the optical diaphragm is used for receiving and reflecting the light beams to display pictures. The curtain sheet 300 may be fixed on the flexible carrier 200 by means of adhesion, for example, the curtain sheet 300 may be adhered to the flexible carrier 200 by an adhesive film. The flexible carrier 200 may be a flexible cloth such as a synthetic cloth, and may also be other flexible members as long as the flexible carrier can be bent at will and has a certain flatness after being tensioned, which is not limited in the embodiment of the present application. It should be noted that the projection of the flexible carrier 200 on the plane of the curtain sheet 300 covers the curtain sheet 300 or covers four side edges of the curtain sheet 300, so as to ensure that the edge portions of the flexible carrier 200 extend out of the four side edges of the curtain sheet 300, and further ensure the flatness of the curtain sheet 300 while tensioning the flexible carrier 200.

In the present application, the protruding structure 102 in the frame 100 may have a supporting surface 1021 on the same side as the front surface of the frame body 101, and a side C of the supporting surface 1021 near the frame body 101 may be located between the curtain sheet 300 and the frame body 101 in a direction perpendicular to the curtain sheet 300.

For example, referring to fig. 6, fig. 6 is a diagram illustrating an effect when a screen in the projection screen shown in fig. 4 is expanded. Since the side C of the supporting surface 1021 of the protruding structure 102 close to the frame body 101 is located between the curtain sheet 300 and the frame body 101, when the curtain sheet 300 expands due to heat, the edge portion of the curtain sheet 300 contacts with the side C of the supporting surface 1021 first, and then the edge portion of the curtain sheet 300 slides on the supporting surface 1021 along the direction away from the frame body 101. Therefore, the side surface of the curtain sheet 300 does not contact with the frame 100, and thus the undesirable phenomenon of bulging at the edge portion of the curtain sheet 300 can be effectively avoided.

When the curtain sheet 300 is shrunk due to cooling, the edge portion of the curtain sheet 300 may not contact the frame 100, i.e., the edge portion of the curtain sheet 300 may shrink on the flexible carrier 200 normally. Thereby effectively avoiding the bad degumming phenomenon at the edge of the curtain sheet 300.

In summary, the projection screen provided in the embodiment of the present application includes: a frame, a flexible carrier, and a curtain. The frame includes frame body and protruding structure, and the curtain piece is fixed in the one side that the frame body was kept away from to flexible carrier, and the another side laminating of flexible body is in the front of frame body. Because the side that is close to the frame body in the holding surface of protruding structure is located between curtain and the frame body, when the curtain takes place the thermal expansion phenomenon, the edge part of curtain can be earlier with the side contact of holding surface, then the edge part of curtain can slide on the holding surface along the direction that deviates from the frame body. Therefore, the side surface of the curtain sheet can not be in contact with the frame, and the bad phenomenon of bulging at the edge of the curtain sheet can be effectively avoided. When the curtain sheet is subjected to cold contraction, the edge part of the curtain sheet is not contacted with the frame, namely, the edge part of the curtain sheet can be normally contracted on the flexible carrier. Thereby effectively avoiding the bad phenomenon of degumming at the edge part of the curtain sheet.

Optionally, please refer to fig. 7 and fig. 8, where fig. 7 is a partial structural schematic view of another projection screen provided in an embodiment of the present application, and fig. 8 is a partial enlarged schematic view of fig. 7 at B'. The supporting surface 1021 of the convex structure 102 on the same side as the front surface of the frame body 101 may have a rounded corner C1 near the side C of the frame body 101. Thus, when the curtain sheet 300 expands, the edge portion of the curtain sheet 300 first contacts the rounded corner C1. In this way, the edge portion of the curtain sheet 300 can smoothly contact with the support surface 1021 and slide on the support surface 1021. Moreover, the probability that the side edge C of the frame body 101 scratches the bottom layer of the edge portion of the curtain sheet 300 can be effectively reduced through the round corner C1. The bottom layer of the curtain sheet 300 is a surface of the curtain sheet 300 close to the flexible carrier 200.

In the embodiment of the present application, in a direction perpendicular to the curtain sheet 300, the curtain sheet 300 may be located between the side edge D of the supporting surface 1021 of the protrusion structure 102 on the same side as the front surface of the frame body 101, which faces away from the frame body 101, and the frame body 101. In addition, in the direction perpendicular to the curtain sheet 300, the side edge C of the support surface 1021 near the frame body 101 is located between the curtain sheet 300 and the frame body 101. In this way, the protruding structures 102 in the frame 100 can effectively protect the edge portion of the curtain sheet 300, and thus can prevent the bottom layer of the edge portion of the curtain sheet 300 from being scratched.

Optionally, there are various optional implementations of the shape of the supporting surface 1021 on the same side as the front surface of the frame body 101 in the protruding structure 102, and the embodiment of the present application will be schematically described by taking the following two optional implementations as examples:

in a first alternative implementation, the support surface 1021 may be a slanted plane. Referring to fig. 9, fig. 9 is a diagram illustrating the effect of the projection screen shown in fig. 7 when the screen expands. When the curtain sheet 300 expands due to heat, the edge portion of the curtain sheet 300 contacts the side edge C of the support surface 1021 first; then, the edge portion of the curtain sheet 300 slides on the inclined plane in a direction away from the frame body 101. Therefore, the side of the curtain sheet 300 does not contact the frame 100. In addition, the horizontal distance between the flexible carrier 200 and the contact area of the edge portion of the curtain sheet 300 and the side edge C of the support surface 1021 is L2, and the value of L2 is significantly smaller than the value of L1. In this manner, the moment at the contact area of the edge portion of the curtain sheet 300 with the side edge C of the support surface 1021 is made smaller. Thus, the occurrence of the defect of the debonding at the edge portion of the curtain sheet 300 can be effectively prevented.

In a second alternative implementation, the support surface 1021 may be a sloped curved surface. In this case, when the curtain sheet 300 expands due to heat, the edge portion of the curtain sheet 300 contacts the side edge C of the support surface 1021 first; then, the edge portion of the curtain sheet 300 slides on the inclined curved surface in a direction away from the frame body 101. Thus, the side surface of the curtain sheet 300 does not contact with the frame 100, and the undesirable phenomenon of bulging at the edge portion of the curtain sheet 300 can be effectively avoided.

In the embodiment of the present application, an included angle α between the supporting surface 1021 of the protruding structure 102 on the same side as the front surface of the frame body 101 and the target plane may range from 15 degrees to 30 degrees. Wherein the target plane may be a plane parallel to the curtain. Thus, the curtain sheet 300 is thermally expanded, and when the curtain sheet 300 contacts with the supporting surface 1021, the supporting force of the supporting surface 1021 on the curtain sheet 300 is small. Thus, the defect of degumming at the edge part of the curtain sheet 300 can be effectively prevented.

Alternatively, referring to fig. 8, in a direction parallel to the curtain sheet 300, the side surface of the curtain sheet 300 may protrude from the portion of the flexible carrier 200 in the through groove 103. In this way, the curtain sheet 300 can shield the flexible carrier 200 bent to the back of the frame body 101 through the through groove 103. Thus, the bad phenomenon of skew occurring when the curtain sheet 300 is attached to the flexible carrier 200 can be effectively prevented.

In the embodiment of the present application, please refer to fig. 7 and 8, an orthogonal projection of the through slot 103 between the protruding structure 102 and the frame body 101 in the frame 100 on the target plane may be located within an orthogonal projection of the curtain sheet 300 on the target plane. Wherein the target plane may be a plane parallel to the curtain 300. The edge part of the curtain sheet 300 can shield the notch of the through groove 103, and can further perform the function of decorating the front surface of the frame body 101.

Optionally, please refer to fig. 8, fig. 10 and fig. 11, fig. 10 is a schematic structural diagram of a frame according to an embodiment of the present application, and fig. 11 is a schematic partial enlarged view of fig. 10 at C'. The frame body 101 in the projection screen 000 may include a plurality of rims 1011, and each rim 1011 may have at least one through slot 103. For example, the frame body 101 may include four rims 1011, and ends of two adjacent rims 1011 of the four rims 1011 may be connected to each other. Thus, the four rims 1011 can constitute a rectangular frame. While each bezel 1011 may have a plurality of through slots 103, the edge portions of the flexible carrier 200 may include: and a plurality of connection portions 201 corresponding to the plurality of through grooves 103 one to one. Each connecting portion 201 may be connected to the second side B of the frame body 101 after passing through the corresponding through slot 103.

In the embodiment of the present application, when each of the plurality of frames 1011 has a plurality of through slots 103, the plurality of through slots 103 may be uniformly arranged along the length direction of the frame 1011. Like this, the length of every logical groove 103 in a plurality of logical grooves 103 is shorter, can effectual improvement frame 1011's rigidity, and then can realize the stable support to flexible carrier 200 and curtain piece 300.

Optionally, the number of the through slots 103 on each of the plurality of frames 1011 may be one, that is, one elongated through slot 103 having a length approximately equal to the length of the frame 1011. The connection portion 201 of the edge portion of the flexible carrier 200 may be one. It should be noted that the number of the through slots 103 on each of the plurality of frames 1011 may be the same or different, and this is not limited in this embodiment of the application.

In the embodiment of the present application, please refer to fig. 7, the projection screen 000 may further include: the tensioning mechanism 400. The tensioning mechanism 400 can adjust the tension of the flexible carrier 200, and thus the tension of the curtain sheet 300. One end of the tensioning mechanism 400 may be connected with the edge portion of the flexible carrier 200 passing through the through slot 103, and the other end of the tensioning mechanism 400 may be connected with the second side B of the frame body 101.

By way of example, the tensioning mechanism 400 may include: a first tensioning mechanism 401 and a second tensioning mechanism (not shown). Wherein the first tightening mechanism 4011 can adjust the degree of tightening of the flexible carrier 200 in the short side direction (e.g., Y-axis direction) of the flexible carrier 200; the second tightening mechanism can adjust the degree of tightening of the flexible carrier 200 in the long-side direction (for example, the Z-axis direction) of the flexible carrier 200.

The first tensioning mechanism 401 may include: a first tension member 4011 and a first support bar 4012. One end of the first tension member 4011 is connected to the first support bar 4012, and the other end 4011 of the first tension member 4011 is connected to the second side B of the frame body 101. The first support rods 4012 are connected to edge portions of the flexible carrier 200 in a length direction of the rim 1011. For example, an edge portion of the flexible carrier 200 may have a receiving pocket B1, i.e., the edge portion of the flexible carrier 200 may pass through the through-slot 103 to the back of the frame body 101 to form a receiving pocket B1. The receiving pocket B1 may have an opening (not shown) through which one end of the first straining member 4011 may be connected to the first supporting rod 4012. The accommodating pockets B1 at the positions corresponding to the borders 1011 of the frame body 101 are all provided with first supporting rods 4012. In this way, the edge portion of the flexible carrier 200 is integrally supported by the first support rod 4012, and then the first support rod 4012 is tensioned by the first tensioning member 4011, so that the integral tensioning of the edge portion of the flexible carrier 200 by the first tensioning member 4011 is realized. Thereby guaranteed the taut homogeneity of flexible carrier 200, avoided flexible carrier 200 to appear the phenomenon of fold because of local tautness is great, and then can avoid appearing the phenomenon of fold with the curtain piece 300 of flexible carrier 200 laminating.

In an embodiment of the present application, the second tensioning mechanism may comprise: a second tension member and a second support bar. One end of the second tension member is connected to the second support bar, and the other end of the second tension member is connected to the second side B of the frame body 101. The second support bar is connected to an edge portion of the flexible carrier 200 in the length direction of the rim 1011. For example, an edge portion of the flexible carrier 200 may have a receiving pocket B1, i.e., the edge portion of the flexible carrier 200 may pass through the through-slot 103 to the back of the frame body 101 to form a receiving pocket B1. The receiving pocket B1 may have an opening (not shown) through which one end of the second tension member may be coupled to the second support bar. The accommodating pockets B1 at the corresponding positions of the frames 1011 in the frame body 101 are all provided with second support bars. The structure of the second tensioning mechanism may refer to the structure of the first tensioning mechanism 401 described above. In this way, the edge portion of the flexible carrier 200 is integrally supported by the second support rod, and then the second support rod is tensioned by the second tensioning member, so that the edge portion of the flexible carrier 200 is integrally tensioned by the second tensioning member. Thereby guaranteed the taut homogeneity of flexible carrier 200, avoided flexible carrier 200 to appear the phenomenon of fold because of local tautness is great, and then can avoid appearing the phenomenon of fold with the curtain piece 300 of flexible carrier 200 laminating.

Optionally, the first and

second tension members

4011 and 4011 may each be a tension spring. In this application, the first tensioning member 4011 and the second tensioning member may also be in other tensioning structures, which is not limited in this application. For example, when the first tension member 4011 is an extension spring, one end of the extension spring may be connected to the first support rod 4012 by a hook, and the other end of the extension spring is connected to the second side B of the frame body 101 by a hook. When the second tensioning member is an extension spring, one end of the extension spring may be connected to the second support rod through a hook, and the other end of the extension spring may be connected to the second side B of the frame body 101 through a hook.

In the present embodiment, the end portions of the plurality of rims 1011 in the frame body 101 each have a cavity E. The frame body 101 may further include: in the angle iron 1012, a portion of the angle iron 1012 may be located in the cavity E of one of the two adjacent frames 1011, and another portion of the angle iron 1012 may be located in the cavity E of the other of the two adjacent frames 1011. Wherein, angle bar 1012 is planar structure, and the angle limit of angle bar 1012 has the screw hole, and the tip of two adjacent frames 1011 all has the through-hole that corresponds with the screw hole, can pass the through-hole through set screw like this promptly to the corresponding screw hole of precession realizes two adjacent frame 1011's fixed connection, and then realizes a plurality of frame 1011's fixed connection in the frame body 101.

In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is intended to be exemplary only, and not to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included therein.

Claims

1. A projection screen, comprising: a frame, a flexible carrier, and a curtain;

2. The projection screen of claim 1 wherein the sides of the support surface adjacent the frame body have rounded corners.

3. The projection screen of claim 1 wherein the curtain is positioned between a side of the support surface facing away from the frame body and the frame body in a direction perpendicular to the curtain.

4. The projection screen of claim 2 wherein the support surface is an inclined plane or an inclined curved surface.

5. The projection screen of claim 4 wherein the support surface is at an angle in the range of 15 degrees to 30 degrees from a target plane, the target plane being a plane parallel to the screen.

6. The projection screen of claim 1 wherein the sides of the curtain sheet protrude from the portion of the flexible carrier in the through slot in a direction parallel to the curtain sheet.

7. The projection screen of claim 6 wherein an orthographic projection of the through slot on a target plane is within an orthographic projection of the screen sheet on the target plane, the target plane being a plane parallel to the screen sheet.

8. The projection screen of any one of claims 1 to 7, wherein the frame body comprises: a plurality of frames, each frame having at least one through slot;

the edge portion of the flexible carrier comprises: and the connecting parts are in one-to-one correspondence with the through grooves, and each connecting part penetrates through the corresponding through groove and then is connected with the second side of the frame body.

9. The projection screen of claim 8, wherein each of the frames has a plurality of through slots, and the through slots on the frames are evenly arranged along the length of the frames.

10. The projection screen of any one of claims 1 to 7 further comprising a tensioning mechanism having one end connected to an edge portion of the flexible carrier passing through the channel and another end connected to the second side of the frame body.