CN218471117U - Projection screen - Google Patents

Abstract

The application discloses projection screen belongs to projection technical field. The projection screen includes: two first frames, two second frames and optical curtain piece. The rectangular frame formed by the two first frames and the two second frames supports the optical curtain sheet in the projection screen, so that the flatness of the optical curtain sheet is good, the display effect of a projection picture displayed on the optical curtain sheet is good, and the manufacturing cost of the projection screen is effectively reduced. In addition, when assembling the projection screen, an operator only needs to bond the two first side edge portions of the optical curtain sheet with the bearing surfaces of the two first frames respectively, and fixedly connect the two second frames with the end portions of the two first frames, so that the projection screen can be assembled. So, the equipment degree of difficulty of projection screen in this application is lower, the effectual equipment process of simplifying projection screen, and then can guarantee that projection screen's packaging efficiency is higher.

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.

In the related art, the size of the projection screen is larger and larger, and the space occupied by the projection screen is larger, so that the transportation difficulty of the projection screen is higher.

In order to reduce the transportation difficulty, the projection screen is usually required to be prepared to be detachable. However, the assembly process of the present detachable projection screen is complicated, resulting in low assembly efficiency of the projection screen.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a projection screen. The problem of projection screen packaging efficiency among the prior art is lower can be solved, technical scheme is as follows:

in one aspect, a projection screen is provided, the projection screen comprising:

the first frames are arranged oppositely, and each first frame is provided with a bearing surface;

the end parts of the second frame and the first frame are fixedly connected;

and the optical curtain sheet is provided with two first side edge parts which are oppositely arranged and two second side edge parts which are oppositely arranged, wherein the first side edge parts are respectively bonded with the bearing surfaces in the first frame, and the second side edge parts are respectively contacted with the second frame.

The beneficial effects that technical scheme that this application embodiment brought include at least:

a projection screen, may comprise: two first frames, two second frames and an optical curtain sheet. The rectangular frame formed by the two first frames and the two second frames supports the optical curtain sheet in the projection screen, so that the flatness of the optical curtain sheet is good, the display effect of a projection picture displayed on the optical curtain sheet is good, and the manufacturing cost of the projection screen is effectively reduced. In addition, when assembling the projection screen, an operator only needs to bond the two first side edge portions of the optical curtain sheet with the bearing surfaces of the two first frames respectively, and fixedly connect the two second frames with the end portions of the two first frames, so that the projection screen can be assembled. So, the equipment degree of difficulty of projection screen in this application is lower, the effectual equipment process of simplifying projection screen, and then can guarantee that projection screen's packaging efficiency is higher.

Drawings

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

Fig. 1 is a schematic structural view of a detachable projection screen provided in the related art;

fig. 2 is a schematic structural diagram of a projection screen provided in an embodiment of the present application;

FIG. 3 is an exploded schematic view of the projection screen shown in FIG. 2;

FIG. 4 is an enlarged partial schematic view of FIG. 3 at A';

FIG. 5 is an exploded view of a projection screen according to an embodiment of the present disclosure;

FIG. 6 is a front view of a projection screen provided by an embodiment of the present application;

FIG. 7 is a cross-sectional view at B-B' of FIG. 6;

FIG. 8 is a schematic diagram of another projection screen according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a portion of the projection screen shown in FIG. 8;

FIG. 10 is a rear view of the projection screen shown in FIG. 8;

FIG. 11 is a cross-sectional view of FIG. 10 at C-C';

FIG. 12 is a schematic diagram of a partial structure of a projection screen according to an embodiment of the present disclosure;

FIG. 13 is a schematic view of an optical curtain sheet coupled to a second magnet according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram of a portion of another projection screen according to an embodiment of the present disclosure;

fig. 15 is a schematic structural diagram of a laser projection system according to an embodiment of the present application.

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, in order to solve the problem that the transportation difficulty of the projection screen is high due to the large overall size of the projection screen, the projection screen can be prepared to be detachable. For example, referring to fig. 1, fig. 1 is a schematic structural diagram of a detachable projection screen provided in the related art. Projection screen 00 may generally include: a frame 01, a flexible curtain 02, a support rod (not marked in the figure) and a spring 03.

The flexible curtain 02 in the projection screen 00 is attached to the front surface of the frame 01, and the edge part of the flexible curtain 02 is folded to wrap 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 portion of the flexible curtain 02 is folded to wrap the edge of the frame 01, the support rods may be connected with the edge portion of the flexible curtain 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 is connected to the support rod. Here, the spring 03 can be an extension spring, and tension can be applied to the support rod through the extension spring, so that the support rod can apply tension to the flexible curtain 02, and further the front (i.e. the side that needs to present the projection picture) of the flexible curtain 02 has better flatness, so that the display effect of the projection picture presented on the flexible curtain 02 is better.

In general, the frame 01 in the projection screen 00 is a rectangular frame, the number of the support rods in the projection screen 00 is four, the four support rods respectively correspond to four frames in the frame 01 one to one, and each support rod may be located at a position where the corresponding frame is located. The number of the springs 03 connected with each supporting rod in the projection screen 00 is multiple, and the springs 03 connected with the same supporting rod can apply even tension to the supporting rod, so that the supporting rod can tension the flexible curtain 02 from the corresponding frame in the frame 01.

Since each support rod in the projection screen 00 needs to be connected with a plurality of springs 03. Therefore, the number of springs 03 in the projection screen 00 is large. In the assembling process of the projection screen 00, an operator needs to apply an elongation 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. However, the process of applying the stretching force to the spring 03 by the operator is complex, and therefore, when the number of the springs 03 in the projection screen 00 is large, the difficulty in assembling the projection screen 00 is increased, the assembling process of the projection screen 00 is complex, and the assembling efficiency of the projection screen 00 is low.

Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic structural diagram of a projection screen according to an embodiment of the present application, fig. 3 is an exploded schematic view of the projection screen shown in fig. 2, and fig. 4 is a schematic partial enlarged view of fig. 3 at a'. Projection screen 000 may include: two oppositely arranged first frames 100, two oppositely arranged second frames 200 and an optical curtain sheet 300.

Each of the two oppositely disposed first frames 100 in the projection screen 000 may have a carrying surface a.

In two oppositely disposed second frames 200 of the projection screen 000, the ends of the second frames 200 are fixedly connected with the ends of the first frames 100. For example, both ends of one first frame 100 may be fixedly connected to the first ends of two second frames 200, respectively, and both ends of another first frame 100 may be fixedly connected to the second ends of two second frames 200, respectively.

The optical curtain 300 in the projection screen may have two oppositely disposed first side portions 301 and two oppositely disposed second side portions 302. The two first side edge portions 301 may be adhered to the bearing surfaces a of the two first rims 100, respectively, and the two second side edge portions 302 may be in contact with the two second rims 200, respectively. It should be noted that the first side portion 301 of the optical curtain sheet 300 may be an edge portion where a long side of the optical curtain sheet 300 is located, and the second side portion 302 of the optical curtain sheet 300 may be an edge portion where a short side of the optical curtain sheet 300 is located, for example, two oppositely disposed first frames 100 and two oppositely disposed second frames 200 are sequentially connected end to form a rectangular frame, and the optical curtain sheet 300 may be attached to a front surface of the rectangular frame, so as to effectively support the optical curtain sheet 300.

In the embodiment of the present application, when an operator needs to assemble the projection screen 000, firstly, the operator may bond the first side portion 301 of the optical curtain sheet 300 to the bearing surface a on the first frame 100; then, the first end of the second frame 200 is fixedly connected to the two ends of the first frame 100, the second end of the second frame 200 is fixedly connected to the two ends of the other first frame 100, and the second side portion 302 of the optical curtain sheet 300 is in contact with the second frame 200. In this way, the rectangular frame formed by the two first frames 100 and the two second frames 200 can support the optical curtain sheet 300 in the projection screen 000, so that the flatness of the optical curtain sheet 300 is better, the display effect of the projection picture displayed on the optical curtain sheet 300 is better, and the manufacturing cost of the projection screen is effectively reduced.

In this application, an operator only needs to bond the two first side portions 301 of the optical curtain sheet 300 to the bearing surfaces a of the two first frames 100, and fixedly connect the two second frames 200 to the ends of the two first frames 100, so as to complete the assembly of the projection screen 000. Therefore, the assembling difficulty of the projection screen 000 is low, the assembling process of the projection screen 000 is effectively simplified, and the assembling efficiency of the projection screen 000 can be guaranteed to be high.

In summary, the embodiment of the present application provides a projection screen, which may include: two first frames, two second frames and optical curtain piece. The rectangular frame formed by the two first frames and the two second frames supports the optical curtain sheet in the projection screen, so that the flatness of the optical curtain sheet is good, the display effect of a projection picture displayed on the optical curtain sheet is good, and the manufacturing cost of the projection screen is effectively reduced. In addition, when assembling the projection screen, an operator only needs to bond the two first side portions of the optical curtain sheet with the bearing surfaces of the two first frames respectively, and fixedly connect the two second frames with the end portions of the two first frames, so that the projection screen can be assembled. So, the equipment degree of difficulty of projection screen in this application is lower, the effectual equipment process of simplifying projection screen, and then can guarantee that projection screen's packaging efficiency is higher.

Optionally, please refer to fig. 5, where fig. 5 is an exploded schematic view of a projection screen according to an embodiment of the present application. Projection screen 000 may also include: the adhesive part 400, the adhesive part 400 can be adhered to the first side portion 301 of the optical curtain sheet 300 and the carrying surface a of the first frame 100, respectively. The orthographic projection of the optical curtain sheet 300 on the carrying surface a can cover the orthographic projection of the bonding part 400 on the carrying surface a. In this case, the optical curtain sheet 300 can be stably fixed to the first frame 100 by adhering the adhesive part 400 to the first side part 301 of the optical curtain sheet 300, which is close to the carrying surface a of the first frame 100, to the carrying surface a. For example, the number of the bonding portions 400 may be two, and the two bonding portions 400 are bonded to the receiving surfaces a of the two first frames 100, respectively. The adhesive part 400 may be formed of a Polyethylene Terephthalate (PET) double-sided tape. The PET double faced adhesive tape has the advantages of good mechanical property, high temperature resistance and low temperature resistance. In other realizable manners, the bonding portion 400 may also be a structure made of foam cotton, which is not limited in the embodiment of the present application. Illustratively, during the actual assembly process, when the adhesive part 400 is used to fix the optical curtain sheet 300 and the first frame 100. Firstly, the bonding part 400 is bonded to the carrying surface a of the first frame 100, and then the optical curtain sheet 300 is flattened by the negative pressure platform and then integrally bonded to the first frame 100 bonded with the bonding part 400, so that the bonding precision and the integral flatness of the optical curtain sheet 300 can be effectively ensured.

In the present application, there are various optional implementations of the arrangement of the bonding portion 400, and the following embodiments of the present application are schematically illustrated by taking the following two optional implementations as examples:

in a first alternative implementation, the bonding part 400 in the projection screen 000 may be a bonding layer disposed in a whole layer, and the orthographic projection of the optical curtain sheet 300 on the bearing surface a in the first frame 100 covers the orthographic projection of the bonding layer on the bearing surface a in the first frame 100. In this way, the optical curtain sheet 300 is attached to the carrying surface a of the first frame 100 by the bonding portion provided in the entire layer, thereby ensuring the bonding stability of the optical curtain sheet 300.

In a second alternative implementation, the bonding part 400 in the projection screen 000 may include: a plurality of bonding bars (not shown), wherein every two adjacent bonding bars of the plurality of bonding bars are disposed at intervals, and the orthographic projection of the optical curtain sheet 300 on the bearing surface a in the first frame 100 covers the orthographic projection of the plurality of bonding bars on the bearing surface a in the first frame 100. In this way, in the process of attaching the adhesive tape to the carrying surface a of the first frame 100, air bubbles are not generated in the area of the carrying surface a not bonded to the adhesive tape. Even if bubbles are generated between the bonded area in the optical curtain sheet 300 and the adhesive tape, the bubbles can be released through the cavity formed between the area of the carrying surface a not bonded to the adhesive tape and the non-bonded area in the optical curtain sheet 300. The probability of bubbles generated in the process of bonding the bonding part 400 and the optical curtain sheet 300 is effectively reduced, and the bad phenomenon of bulging of the optical curtain sheet 300 can be effectively avoided.

In the embodiment of the present application, please refer to fig. 6 and 7, in which fig. 6 is a front view of a projection screen provided in the embodiment of the present application, and fig. 7 is a cross-sectional view of fig. 6 at B-B'. The side of the second frame 200 of the projection screen 000 facing the second side portion 302 of the optical curtain sheet 300 may have a receiving groove 201, and the second side portion 302 may be located in the receiving groove 201 and contact with a part of the side surface in the receiving groove 201. The length direction of the receiving groove 201 may be parallel to the length direction of the second frame 200. In this case, by providing the receiving groove 201 on the second frame 200, after the first side portion 301 of the optical curtain sheet 300 is attached to the carrying surface a of the first frame 100, the first end and the second end of the second frame 200 are respectively fixedly connected to the ends of the two first frames 100. And the second side portion 302 of the optical curtain sheet 300 is positioned in the receiving groove 201 of the second bezel 200. Thus, the accommodating groove 201 can limit the second side portion 302 of the optical curtain sheet 300, and effectively reduces the bad phenomenon that the second side portion 302 of the optical curtain sheet 300 is warped.

Alternatively, as shown in fig. 7, a gap B may be formed between a side surface of the second side portion 302 of the optical curtain sheet 300 and a bottom surface of the receiving groove 201 in the second bezel 200 facing the second side portion 302. In this case, a certain gap B is provided between the side surface of the second side portion 302 of the optical curtain sheet 300 and the bottom surface of the accommodating groove 201 on the second bezel 200 facing the second side portion 302 of the optical curtain sheet 300. Thus, when the optical curtain sheet 300 is expanded, the gap B can buffer the expansion of the optical curtain sheet 300, and prevent the optical curtain sheet 300 from expanding and then contacting the bottom surface of the accommodating groove 201 facing the second side portion 302.

In the embodiment of the present application, as shown in fig. 7, the projection screen 000 may further include: the buffer layer 500, the buffer layer 500 may be wrapped on the second side portion 302 of the optical curtain sheet 300, and the buffer layer 500 may be located between the second side portion 302 of the optical curtain sheet 300 and the accommodating groove 201 in the second bezel 200. In this case, by wrapping the buffer layer 500 on the second side portion 302 of the optical curtain sheet 300, after the second side portion 302 of the optical curtain sheet 300 wrapped with the buffer layer 500 is located in the accommodating groove 201 on the second frame 200, the buffer layer 500 can prevent the groove surface of the accommodating groove 201 from directly contacting the second side portion 302 of the optical curtain sheet 300 to scratch the optical curtain sheet 300. Thereby effectively ensuring the high yield of the projection screen 000. For example, the cushioning layer 500 may be a cushioning foam or a cushioning rubber.

Optionally, please refer to fig. 8, fig. 9, fig. 10, and fig. 11, where fig. 8 is a schematic structural diagram of another projection screen provided in an embodiment of the present application, fig. 9 is a schematic partial structural diagram of the projection screen shown in fig. 8, fig. 10 is a rear view of the projection screen shown in fig. 8, and fig. 11 is a cross-sectional view of fig. 10 at C-C'. The second frame 200 in the projection screen 000 may include: a first sub-bezel 202 and a second sub-bezel 203. The first end of the first sub-frame 202 may be fixedly connected to an end of one first frame 100, and the second end of the first sub-frame 203 may be fixedly connected to an end of another first frame 100. The second sub-frame 203 of the second frame 200 may have a bearing groove C, at least a portion of the first sub-frame 202 may be located in the bearing groove C, and the first sub-frame 202 may be fixedly connected to the first side C1 of the bearing groove C. A part of the second side surface C2 of the bearing groove C, the bottom surface C3 of the bearing groove C, and at least a part of a surface D of the first sub-frame 202 away from the first side surface C1 of the bearing groove C may be used to enclose the receiving groove 201. The first side surface C1 of the bearing groove C and the second side surface C2 of the bearing groove C may be two side surfaces oppositely disposed in the bearing groove C in the second sub-frame 203, and the bottom surface C3 of the bearing groove C may be located between the first side surface C1 of the bearing groove C and the second side surface C2 of the bearing groove C. In this case, first, the operator may fixedly connect the first end of the first sub-frame 202 to the end of one of the two first frames 100, and fixedly connect the second end of the first sub-frame 202 to the end of the other of the two first frames 100; then, two first side edge portions 301 of the optical curtain sheet 300 are respectively attached to the bearing surfaces a on the two first frames 100; finally, at least part of the first sub-frame 202 is wrapped by the bearing groove C on the second sub-frame 203, and the second sub-frame 203 is fixedly connected with the first sub-frame 202, so as to assemble the projection screen 000. Thus, the first sub-frame 202 and the first frame 100 form a frame, the optical curtain sheet 300 is attached to the front surface of the frame, and the second sub-frame 203 is fixedly connected to the first sub-frame 202 to enhance the structural strength of the frame. Therefore, the yield of the assembled projection screen 000 is effectively ensured. For example, the number of the first sub-frame 202 and the second sub-frame 203 may be two.

In the present application, as shown in fig. 9, 10 and 11, the projection screen 000 may further include: the fixing screw 600, the first sub-frame 202 and the second sub-frame 203 are provided with screw holes (not shown in the figure) for communication, and the fixing screw 600 can sequentially pass through the screw holes on the second sub-frame 203 and the screw holes on the first sub-frame 202 to fixedly connect the first sub-frame 202 and the second sub-frame 203. It should be noted that the number of the fixing screws 600 may be multiple, and the arrangement direction of the fixing screws 600 may be parallel to the length direction of the second sub-frame 203. For example, the first sub-frame 202 and the second sub-frame 203 may be fixedly connected by three fixing screws 600, which is not specifically limited in the embodiment of the present application.

In the embodiment of the present application, a surface D of the first sub-frame 202 in the second frame 200, which faces away from the first side surface C1 of the carrying groove C, may be coplanar with the carrying surface a in the first frame 100 and contact the second side portion 302 in the optical curtain sheet 300. In this case, a surface D of the first sub-frame 202 facing away from the first side surface C1 of the bearing groove C is coplanar with the bearing surface a of the first frame 100 and contacts the second side edge portion 302. Therefore, a certain supporting effect can be exerted on the second side edge portion 302 of the optical curtain sheet 300 by the surface D of the first sub-frame 202 away from the first side surface C1 of the carrying groove C, so that the optical curtain sheet 300 is guaranteed to have good overall flatness.

Optionally, please refer to fig. 12 and fig. 13, where fig. 12 is a schematic partial structural diagram of a projection screen provided in an embodiment of the present application, and fig. 13 is a schematic diagram of an optical curtain provided in an embodiment of the present application and a connection between the optical curtain and a second magnet. Projection screen 000 may also include: a first magnet 700 fixedly connected to the second bezel 200, and a second magnet 800 fixedly connected to a side of the second side portion 302 of the optical curtain sheet 300 close to the second bezel 200. Wherein the magnetism of the first magnet 700 is attracted to the magnetism of the second magnet 800. In this case, by fixedly connecting the first magnet 700 to the second bezel 200, the second magnet 800 is fixedly connected to the second side portion 302 of the optical curtain sheet 300 near the second bezel 200. In this way, the second side portion 302 of the optical curtain sheet 300 can be fixed on the second bezel 200 by the magnetic attraction between the first magnet 700 and the second magnet 800. Therefore, the bad phenomenon that the second side portion 302 of the optical curtain sheet 300 is warped is effectively avoided, and the optical curtain sheet 300 is guaranteed to have good overall flatness. For example, the number of the first magnets 700 may be two, and the number of the second magnets 800 may be two. The first and second magnets 700 and 800 may each be a long bar-shaped magnet structure, and the length directions of the long bar-shaped first and second magnets 700 and 800 may be parallel to the length direction of the second bezel 200. Alternatively, the first magnet 700 and the second magnet 800 may be both block-shaped magnet structures, which is not specifically limited in this embodiment.

In the embodiment of the present application, please refer to fig. 14, and fig. 14 is a schematic partial structural diagram of another projection screen provided in the embodiment of the present application. One side of the second bezel 200 adjacent to the optical curtain sheet 300 may have a fixing groove 204, and the first magnet 700 may be fixed in the fixing groove 204. In this case, since the projection screen 000 fixes the second side portion 302 of the optical curtain sheet 300 by the adsorption of the first and second magnets 700 and 800 during the actual assembly process, the thicknesses of the first and second magnets 700 and 800 may be greater than the thickness of the adhesive film used to adhere the first side portion 301 of the optical curtain sheet 300. Therefore, in order to ensure the flatness of the entire optical curtain sheet 300, a fixing groove 204 is formed on one surface of the second bezel 200 adjacent to the optical curtain sheet 300, and the first magnet 700 is fixed in the fixing groove 204. It should be noted that the depth of the fixing groove 204 may be set according to actual needs, and this is not specifically limited in this embodiment of the application.

Alternatively, as shown in fig. 8 and 12, the projection screen 000 may further include: at least one supporting rod 900, the supporting rod 900 may be located between the two first frames 100, and both ends of the supporting rod 900 may be fixedly connected to the two first frames 100, respectively. In the present application, the first frame 100 may be a long frame in a rectangular frame, and the two first frames 100 in the rectangular frame can be supported by fixedly connecting the supporting rod 900 to the two first frames 100 disposed opposite to each other. In this way, after the optical sheet 300 is attached to the rectangular frame, the direction of the long side of the optical sheet 300 is the same as the extending direction of the length of the first frame 100. And then can reduce the probability of the bad phenomenon that the optical curtain piece 300 falls and deforms after long-term use through the supporting function of the support rod 900 to the rectangular frame.

For example, as shown in fig. 8 and 10, the first end of the second frame 200 and the end of one first frame 100 may be fixed by using an angle iron 1000 (e.g., a right-angle iron), and the second end of the second frame 200 and the end of another first frame 100 may also be fixed by using an angle iron 1000, so as to enclose two first frames 100 and two second frames 200 into a rectangular frame.

In the embodiment of the present application, as shown in fig. 12, the projection screen 000 may further include: at least one shock absorbing layer 1100, and one side of each shock absorbing layer 1100 can be fixedly connected with one side of the supporting rod 900 corresponding to this shock absorbing layer 1100, which is close to the optical curtain sheet 300, and the other side of the shock absorbing layer 1100 can be in contact with the optical curtain sheet 300. In this case, by disposing the shock absorbing layer 1100 between the optical curtain sheet 300 and the supporting rod 900, the shaking of the optical curtain sheet 1100 can be effectively reduced, and the display effect of the picture projected on the optical curtain sheet 300 is ensured to be good. In addition, the direct contact between the optical curtain sheet 300 and the supporting rod 900 can be avoided, the supporting rod 900 is prevented from scratching the optical curtain sheet 300, and the good yield of the optical curtain sheet 300 is ensured. For example, the shock absorbing layer 1100 may be a shock absorbing foam or a shock absorbing rubber, which is not specifically limited in this embodiment of the present application.

In summary, the embodiment of the present application provides a projection screen, which may include: two first frames, two second frames and an optical curtain sheet. The rectangular frame formed by the two first frames and the two second frames supports the optical curtain sheet in the projection screen, so that the flatness of the optical curtain sheet is good, the display effect of a projection picture displayed on the optical curtain sheet is good, and the manufacturing cost of the projection screen is effectively reduced. In addition, when assembling the projection screen, an operator only needs to bond the two first side edge portions of the optical curtain sheet with the bearing surfaces of the two first frames respectively, and fixedly connect the two second frames with the end portions of the two first frames, so that the projection screen can be assembled. So, the equipment degree of difficulty of projection screen in this application is lower, the effectual equipment process of simplifying projection screen, and then can guarantee that projection screen's packaging efficiency is higher.

The embodiment of the application also provides a laser projection system which can be an ultra-short-focus laser projection system. For example, please refer to fig. 15, fig. 15 is a schematic structural diagram of a laser projection system according to an embodiment of the present application. The laser projection system may include: a projection screen 000 and a laser projection device 001. The projection screen 000 may be the projection screen shown in any of the above embodiments.

Thus, when the laser projection device 001 works, the laser projection device 001 can emit light rays obliquely upwards, so that the laser projection device 001 can project pictures to the projection screen 000.

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 (10)

1. A projection screen, comprising:

the first frames are arranged oppositely, and each first frame is provided with a bearing surface;

the end parts of the second frames are fixedly connected with the end part of the first frame;

and the optical curtain sheet is provided with two first side edge parts which are oppositely arranged and two second side edge parts which are oppositely arranged, wherein the first side edge parts are respectively bonded with the bearing surfaces in the first frame, and the second side edge parts are respectively contacted with the second frame.

2. The projection screen of claim 1, further comprising: the optical curtain piece comprises a first side part and a bonding part bonded with the bearing surface respectively, and the orthographic projection of the optical curtain piece on the bearing surface covers the orthographic projection of the bonding part on the bearing surface.

3. The projection screen of claim 1, wherein the second bezel has a receiving groove on a side facing a second side portion of the optical curtain sheet, the second side portion being located in the receiving groove and contacting a portion of a side surface in the receiving groove;

the length direction of the accommodating groove is parallel to the length direction of the second frame.

4. The projection screen of claim 3 wherein a space is provided between a side surface of the second side portion and a bottom surface of the receiving groove facing the second side portion.

5. The projection screen of claim 4 wherein the projection screen further comprises: a buffer layer wrapped on the second side portion and located between the second side portion and the receiving groove.

6. The projection screen of any one of claims 3-5, wherein the second frame comprises: a first sub-frame and a second sub-frame;

the first end of the first sub-frame is fixedly connected with the end part of one first frame, and the second end of the first sub-frame is fixedly connected with the end part of the other first frame;

the second sub-frame is provided with a bearing groove, at least part of the first sub-frame is positioned in the bearing groove, the first sub-frame is fixedly connected with the first side surface of the bearing groove, and the second side surface of the bearing groove, one part of the bottom surface of the bearing groove and at least part of one surface of the first sub-frame, which is deviated from the first side surface, are used for enclosing the accommodating groove;

the first side surface and the second side surface are two side surfaces which are oppositely arranged in the bearing groove, and the bottom surface of the bearing groove is positioned between the first side surface and the second side surface.

7. The projection screen of claim 1 wherein the projection screen further comprises: the first magnetic body is fixedly connected with the second frame, the second magnetic body is fixedly connected with one side, close to the second frame, of the second side edge part, and the magnetism of the first magnetic body is attracted with that of the second magnetic body.

8. The projection screen of claim 7, wherein a side of the second bezel adjacent to the optical curtain sheet has a fixing groove, and the first magnet is fixed in the fixing groove.

9. The projection screen of any one of claims 1-5, 7 or 8 wherein the projection screen further comprises: the supporting rod is positioned between the two first frames, and two ends of the supporting rod are fixedly connected with the two first frames respectively.

10. The projection screen of claim 9, wherein the projection screen further comprises: at least one buffer layer, at least one buffer layer with at least one bracing piece one-to-one, and every the one side of buffer layer is close to with the bracing piece that corresponds the one side fixed connection of optics curtain piece, the another side with optics curtain piece contact.

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