WO2023020543A1

WO2023020543A1 - Projection apparatus

Info

Publication number: WO2023020543A1
Application number: PCT/CN2022/113075
Authority: WO
Inventors: 肖伟; 张海鹏; 代琪; 李建军; 杨长明; 逄相来
Original assignee: 青岛海信激光显示股份有限公司
Priority date: 2021-08-17
Filing date: 2022-08-17
Publication date: 2023-02-23

Abstract

A projection apparatus (1000), which comprises a projection screen (001) and an optical engine (2). The projection screen (001) comprises: a frame (100), a flexible carrier (200), a screen sheet (300) and a screen sheet protection structure (108). The frame (100) comprises a first frame (104), the first frame (104) has a first side (A) and a second side (B), the first side (A) is the side of the first frame (104) distant from the center of the projection screen (001), and the second side (B) is the side of the first frame (104) close to the center of the projection screen (001). The flexible carrier (200) is attached to the front surface of the first frame (104). The screen sheet (300) is connected to the surface of the flexible carrier (200) distant from the first frame (104). The screen sheet protection structure (108) is arranged on the first side (A) of the first frame (104); and the screen sheet protection structure (108) is configured to make an edge portion of the screen sheet (300) slide on the screen sheet protection structure (108) once the screen sheet (300) is thermally expanded. The optical engine (2) is configured to emit a light beam to the projection screen (001).

Description

projection device

This application claims the priority of the Chinese patent application with application number 202110943217.6 submitted on August 17, 2021; the priority of the Chinese patent application with application number 202121925285.1 submitted on August 17, 2021; in 2021 Priority to Chinese Patent Application No. 202122472459.X, filed October 14; Priority to Chinese Patent Application No. 202122472458.5, filed October 14, 2021, the entire contents of which are hereby incorporated by reference In this application.

technical field

The present disclosure relates to the technical field of projection, and in particular to a projection device.

Background technique

With the continuous development of science and technology, more and more projection devices are used in the work and life of consumers. At present, a projection device mainly includes a projection host and a projection screen. The light outlet of the projection host faces the projection screen so as to emit light beams to the projection screen, and the projection screen is used to receive the light beams to realize image display.

Contents of the invention

Some embodiments of the present disclosure provide a projection device, and the projection device includes a projection screen and an optical engine. The projection screen includes a frame, a flexible carrier, a screen and a screen protection structure. The frame includes a first frame, the first frame has a first side and a second side, the first side is the side of the first frame away from the center of the projection screen, and the second side is the side of the first frame A frame is close to one side of the center of the projection screen. The flexible carrier is attached to the front of the first frame. The curtain is connected to the surface of the flexible carrier away from the first frame. The curtain protection structure is arranged on the first side of the first frame, and the curtain protection structure is configured to make the edge part of the curtain stay under the curtain protection after the curtain is heated and expanded. Sliding on the structure. The optical engine is configured to emit light beams to the projection screen.

Description of drawings

FIG. 1 is a partial structural diagram of a projection screen in the related art;

FIG. 2 is an effect diagram showing degumming of the screen in the projection screen shown in FIG. 1;

FIG. 3 is an effect diagram of the bulging phenomenon of the screen in the projection screen shown in FIG. 1;

FIG. 4 is a schematic diagram of a usage state of a projection device according to some embodiments of the present disclosure;

FIG. 5 is a partial structural diagram of a projection screen according to an embodiment of the present disclosure;

Fig. 6 is the local enlargement figure of circle A ' place in Fig. 5;

Fig. 7 is an effect diagram when the screen in the projection screen shown in Fig. 5 expands;

FIG. 8 is an exploded view of a framework according to an embodiment of the present disclosure;

Fig. 9 is a partial enlarged view of circle E' in Fig. 7;

FIG. 10 is a partial structural diagram of another projection screen according to an embodiment of the present disclosure;

Fig. 11 is a partial enlarged view of circle B' in Fig. 10;

Fig. 12 is an effect diagram when the screen in the projection screen shown in Fig. 10 is inflated;

FIG. 13 is a partial structural diagram of another projection screen according to an embodiment of the present disclosure;

Fig. 14 is a partial enlarged view of circle C' in Fig. 13;

Fig. 15 is a structural diagram of a flexible carrier and a curtain sheet according to an embodiment of the present disclosure;

Fig. 16 is a structural diagram of a screen in the related art;

FIG. 17 is a cross-sectional view of a screen in a projection device taken on a set vertical plane according to some embodiments of the present disclosure;

Fig. 18 is a schematic diagram of the use state of part of the structure in Fig. 17;

Fig. 19 is a schematic diagram after removing the light-transmitting protrusions on the surface layer in Fig. 18;

FIG. 20 is a schematic diagram of a use state of a screen in a projection device according to some embodiments of the present disclosure;

Fig. 21 is a cross-sectional view of a screen in a projection device taken at a set horizontal plane according to some embodiments of the present disclosure;

22 is a structural diagram of a Fresnel lens layer and a reflective layer in a screen in a projection device according to some embodiments of the present disclosure;

23 is a structural diagram of a Fresnel lens layer and a reflective layer in a screen in a projection device according to other embodiments of the present disclosure;

24 is an expanded view of a screen in a projection device according to some embodiments of the present disclosure;

Fig. 25 is an expanded view of a screen in a projection device according to still other embodiments of the present disclosure;

Fig. 26 is a structural diagram of a screen in a projection device according to some other embodiments of the present disclosure.

Reference signs:

001'-projection screen; 301'-surface layer; 102'-coloring layer; 103'-diffusing layer; 303'-Fresnel lens layer; 304'-reflecting layer; 305'-diffusing particles; 3031'-reflecting surface ;10-flexible curtain; 200'-flexible carrier; 300'-screen; 13-film; 2-optical engine; 104'-first frame; 21-incident light; 22-outgoing light; 3-audience; 105 '-the second frame; 31-fixed sheet; 32-blocking sheet;

001-projection screen; 1000-projection device; 100-frame; 1011-frame; 1012-angle iron; 102-protruding structure; 1021-support surface; ; 1051-the first sheet structure; 1052-the second sheet structure; 1053-the third sheet structure; 108-curtain protection structure;

200-flexible carrier; 201-connection part;

300-screen; 301-surface layer; 3011-light-transmitting protrusions; 302-supporting layer; 3021-supporting base layer; 303-Fresnel lens layer; 3031-reflecting surface; 304-reflecting layer; 311-the first curved section; 311A-the first asymptotic section; 311B-the first asymptotic section; 312-the second curved section; 312A-the second asymptotic section; 312B-the second asymptotic section;

400-the first tensioning mechanism; 4011-the first tensioning member; 4012-the first support rod;

500 - protective layer;

600-the second tensioning mechanism; 6011-the second tensioning member; 6012-the second support rod;

A-first side of the first frame; B-second side of the first frame; B1-accommodation; C1-first side; C2-second side; C3-fillet; D-second side Edge; E-cavity; F-side; G-end face; G1-bevel; G2-arc surface; H-back; H1-first area; H2-second area; J-fillet; S-gap; P-the position where the curtain is in contact with the mask; T-the thickness of the curtain.

Detailed ways

The technical solutions in some embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments provided in the present disclosure belong to the protection scope of the present disclosure.

"At least one of A, B and C" has the same meaning as "at least one of A, B or C" and both include the following combinations of A, B and C: A only, B only, C only, A and B A combination of A and C, a combination of B and C, and a combination of A, B and C.

"A and/or B" includes the following three combinations: A only, B only, and a combination of A and B.

The use of "suitable for" or "configured to" herein means open and inclusive language that does not exclude devices that are suitable for or configured to perform additional tasks or steps.

As used herein, "about", "approximately" or "approximately" includes the stated value as well as the average within the acceptable deviation range of the specified value, wherein the acceptable deviation range is as determined by one of ordinary skill in the art. Determined taking into account the measurement in question and the errors associated with the measurement of a particular quantity (ie, limitations of the measurement system).

In the related art, referring to FIG. 1 , a projection screen 001' generally includes: a flexible screen 10, a first frame 104' and a second frame 105'. The first frame 104' may also generally be referred to as an inner frame, and the second frame 105' may generally also be referred to as an outer frame. The first frame 104' and the second frame 105' are used to support the flexible screen 10.

The flexible screen 10 includes: a flexible carrier 200' (for example: synthetic cloth), a screen 300' and an adhesive film 13. The curtain sheet 300' is bonded to the side of the flexible carrier 200' away from the first frame 104' through the adhesive film 13, and the edge of the flexible carrier 200' extends beyond the four sides of the curtain sheet 300'. The other side of the flexible carrier 200' close to the first frame 104' is attached to the front of the first frame 104', and the edge of the flexible carrier 200' is partially folded to wrap the edge of the first frame 104'. In this way, the flexible screen 10 can be fixed on the first frame 104'.

The second frame 105' includes a fixing piece 31 and a shielding piece 32 connected to each other. The fixing sheet 31 is fixedly connected to the back of the first frame 104', and the shielding sheet 32 covers the edge portion of the curtain sheet 300' in the flexible screen 10.

However, after the screen 300 ′ is bonded to the flexible carrier 200 ′, the screen 300 ′ is prone to heat expansion and contraction, which leads to degumming or bulging at the edge of the screen, which in turn leads to the display on the projection screen. The display effect of the projected picture in the edge area is poor.

For example, referring to FIG. 2, there is a gap S between the masking sheet 32 and the adhesive film 13, and the gap S is configured to accommodate an edge portion of the curtain sheet 300'. When the curtain sheet 300' shrinks due to being cooled, the edge portion of the curtain sheet 300' can easily come out of the gap S. After the curtain 300' comes out of the gap S, the sides of the curtain 300' are easily in contact with the sides of the shielding sheet 32. At this time, if the curtain 300' is thermally expanded, the curtain 300' will not move toward the gap. S expands inside, but expands outside the shielding sheet 32 . In this way, the edge portion of the curtain sheet 300' protruding from the gap S cannot re-enter the gap S through expansion, but is in contact with the side of the shielding sheet 32 away from the flexible carrier 200'. The protruded edge portion of the S will be supported by the shielding sheet 32 . In this way, the horizontal distance between the position P in contact with the shielding sheet 32 in the curtain 300' and the flexible carrier 200' is L1, which is much greater than the thickness T of the curtain 300', resulting in the position P in contact with the shielding sheet 32 in the curtain 300' The position is subjected to a relatively large moment, which leads to the disadvantage that the edge portion of the curtain sheet 300 ′ is prone to debonding.

Referring to FIG. 3, when the curtain sheet 300' is thermally expanded, the side of the curtain sheet 300' will contact the inner side of the second frame 105' facing the curtain sheet 300', resulting in a bulge on the edge of the curtain sheet 300'. unpleasant sight.

In the above-mentioned projection screen 001', no matter whether the screen 300' is degummed or bulged, the display effect of the projection image on the screen 300' in the edge area is likely to be poor.

To this end, some embodiments of the present disclosure provide a projection device. Referring to FIG. 4 , the projection device 1000 includes a projection screen 001 and an optical engine 2 .

For the convenience of describing the projection device 1000, the present disclosure takes the state when the projection screen 001 is unfolded in a certain vertical plane as an example. That is, the thickness direction of the projection screen 001 .

When in use, the optical engine 2 can be placed at the front and bottom of the projection screen 001 , and the audience 3 is located in front of the projection screen 001 and looks at the projection screen 001 . The incident light 21 emitted by the optical engine 2 illuminates the projection screen 001 , and the incident light 21 is reflected by the projection screen 001 to finally form an outgoing light 22 to illuminate the audience 3 and form an image on the projection screen 001 .

In some embodiments, referring to FIG. 5 , the projection screen 001 includes: a frame 100 , a flexible carrier 200 , a screen 300 and a screen protection structure. The frame 100 includes a first frame 104 having a first side A and a second side B, and a second frame 105 . The first side A and the second side B of the first frame 104 are respectively opposite sides of the first frame 104, the first side A is the side of the first frame 104 away from the center of the projection screen, and the second side B is the first side. The side of the frame 104 is near the center of the projection screen. The screen protection structure is disposed on the first side A of the first frame 104 , and the screen protection structure is the protruding structure 102 . The protruding structure 102 is fixedly connected to the first side A of the first frame 104 , and there is a through groove 103 between the protruding structure 102 and the first frame 104 .

One side of the flexible carrier 200 is attached to the front of the first frame 104 , and an edge portion of the flexible carrier 200 is connected to the second side B of the first frame 104 after passing through the slot 103 . The flexible carrier 200 is attached to the front of the first frame 104 , and the edge of the flexible carrier 200 is folded to wrap the edge of the first frame 104 .

The curtain sheet 300 is fixed on a surface of the flexible carrier 200 away from the first frame 104 , and the curtain sheet 300 is connected to a surface of the flexible carrier 200 away from the first frame 104 .

The screen 300 may be an optical film, and the optical film is used to cooperate with the optical engine 2 . The optical engine 2 is used to emit light beams to the optical film, and the optical film is used to receive and reflect the light beams to display images.

The curtain sheet 300 can be fixed on the flexible carrier 200 by bonding, for example, the curtain sheet 300 can be bonded to the flexible carrier 200 through the adhesive film 13 . The flexible carrier 200 may be a flexible cloth such as synthetic cloth. The projection of the flexible carrier 200 on the plane where the screen 300 is located covers the screen 300 or covers the four sides of the screen 300, so as to ensure that the edge portion of the flexible carrier 200 extends out of the four sides of the screen 300, and then the flexible carrier 200 can be tightened. The carrier 200 ensures the flatness of the screen 300 at the same time.

In some embodiments, the protruding structure 102 has a support surface 1021 on the same side as the front of the first frame 104, the support surface 1021 includes a first side C1 and a second side C2, and the first side C1 is located on the support surface. The side of 1021 close to the first frame 104 , the second side C2 is located on the side of the supporting surface 1021 away from the first frame 104 . In a direction perpendicular to the screen 300 , the first side C1 is located between the screen 300 and the frame body 101 .

For example, referring to FIG. 7 , when the curtain sheet 300 is thermally expanded, the edge portion of the curtain sheet 300 will first be in contact with the first side C1 of the support surface 1021 , and then the edge portion of the curtain sheet 300 will be along the support surface 1021 Slide in a direction away from the first frame 104 . Therefore, the side (such as the upper side) of the curtain sheet 300 will not be in contact with the lower side of the protruding structure 102, thereby effectively avoiding the undesirable phenomenon of bulging at the edge portion of the curtain sheet 300. Here, the upper side of the screen 300 is a side of the screen 300 close to the protruding structure 102 .

When the curtain sheet 300 shrinks due to cold, the edge portion of the curtain sheet 300 will not be in contact with the frame 100, that is, the edge portion of the curtain sheet 300 can normally shrink on the flexible carrier 200, thereby effectively preventing the curtain sheet 300 from contracting. The undesired phenomenon of degumming occurs at the edge.

In some embodiments, as shown in FIG. 6 , the first side C1 has rounded corners C3 . When the screen 300 expands, the edge portion of the screen 300 will contact the fillet C3 first. 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 of scratching the back H of the edge portion of the curtain sheet 300 by the first side C1 can be effectively reduced by setting the rounded corner C3. Here, the back surface H of the curtain sheet 300 is a surface of the curtain sheet 300 close to the flexible carrier 200 .

In some embodiments, in a direction perpendicular to the screen 300 , the screen 300 is located between the second side D and the first frame 104 . Due to the direction perpendicular to the screen 300 , the first side C1 is located between the screen 300 and the first frame 104 . In this way, the protruding structure 102 can effectively protect the edge portion of the curtain sheet 300 , and further prevent the rear surface H of the edge portion of the curtain sheet 300 from being scratched. The shape of the supporting surface 1021 can be an inclined plane or a curved surface. When the curtain sheet 300 is thermally expanded, the edge portion of the curtain sheet 300 will first contact the first side C1; then, the edge portion of the curtain sheet 300 will follow the inclined plane or curved surface, and move away from the first frame 104 Swipe in the direction of . Therefore, the side surfaces (such as the upper side) of the screen sheet 300 will not be in contact with the protruding structures 102 .

When the shape of the supporting surface 1021 is an inclined plane, the horizontal distance between the edge portion of the curtain sheet 300 and the contact position of the first side C1 and the flexible carrier 200 is L2, and the value of L2 is significantly smaller than the value of L1. In this way, the moment at the contact area between the edge portion of the curtain sheet 300 and the first side C1 can be made smaller, which can effectively prevent debonding at the edge portion of the curtain sheet 300 . When the shape of the supporting surface 1021 is an inclined curved surface, it is possible to effectively avoid the undesirable phenomenon of bulging at the edge of the curtain sheet 300 .

In some embodiments, as shown in FIG. 6 , the angle α between the supporting surface 1021 and the target plane ranges from 15 degrees to 30 degrees. The target plane is a plane parallel to the screen 300 . In this way, when the curtain sheet 300 is in contact with the supporting surface 1021 after thermal expansion occurs, the supporting force generated by the supporting surface 1021 on the curtain sheet 300 is relatively small. In this way, it is possible to effectively prevent debonding at the edge of the curtain sheet 300 .

In other embodiments, referring to FIG. 10 , the second frame 105 includes a first sheet structure 1051 and a second sheet structure 1052 connected to each other. The first sheet structure 1051 is connected to the side of the first frame 104 away from the curtain sheet 300 . The second sheet structure 1052 covers the side F of the component composed of the first side A of the first frame 104 and the flexible carrier 200, and the end of the second sheet structure 1052 away from the first sheet structure 1051 is provided with a curtain protection Structure 108. After the curtain sheet 300 is heated and expanded, the edge portion of the curtain sheet 300 can slide on the curtain sheet protection structure 108 . In addition, the first sheet-like structure 1051 and the second sheet-like structure 1052 can also be connected indirectly through the third sheet-like structure 1053 .

For example, referring to FIG. 11 , since the side of the second sheet structure 1052 far away from the first sheet structure 1051 has the curtain protective structure 108 , after the curtain sheet 300 is heated and expanded, the edge portion of the curtain sheet 300 will first contact with the curtain sheet. The sheet protection structure 108 contacts, and then the edge portion of the curtain sheet 300 will slide on the curtain sheet protection structure 108 in a direction away from the first frame 104 . Therefore, the lower side of the curtain sheet 300 will not contact the first frame 104 or the second frame 105 , thereby effectively avoiding the bulge at the edge of the curtain sheet 300 . When the curtain sheet 300 shrinks due to cold, the edge portion of the curtain sheet 300 will not be in contact with the first frame 104, nor will it be in contact with the second frame 105, that is, the edge portion of the curtain sheet 300 can be placed on the flexible carrier 200. Shrink up. Furthermore, the undesirable phenomenon of debonding at the edge of the curtain sheet 300 can be effectively avoided.

There are various positional relationships between the end surface G of the curtain protection structure 108 away from the second sheet structure 1052 and the back surface H of the curtain 300 , and the structure of the curtain protection structure 108 is also different under different positional relationships.

In some embodiments, referring to FIG. 11 , in a direction perpendicular to the curtain sheet 300 , the end surface G of the curtain sheet protection structure 108 facing away from the second sheet structure 1052 is farther away from the first frame 104 than the back surface H of the curtain sheet 300 .

For example, when the curtain sheet 300 is heated and expanded, the edge portion of the back surface H of the curtain sheet 300 will first contact with the curtain sheet protection structure 108, and then the edge portion of the curtain sheet 300 will move away from the first frame 104 along the direction of the curtain sheet. Slide on the sheet protection structure 108. In this way, it can be ensured that the edge portion of the curtain 300 will first contact the curtain protection structure 108 in the second frame 105, reducing the contact between the side of the curtain 300 (the following side) and the curtain protection structure 108 in the second sheet structure 1052. The probability of contact with other areas, thereby reducing the probability of bulging at the edge of the screen 300.

For example, referring to FIG. 12 , the side of the curtain protection structure 108 in the second sheet structure 1052 that is close to the curtain 300 has a slope G1 . The width of at least part of the curtain sheet protection structure 108 in a direction perpendicular to the curtain sheet 300 increases along a direction perpendicular to the first sheet structure 1051 and away from the curtain sheet 300 . When the curtain sheet 300 is thermally expanded, the edge portion of the curtain sheet 300 first contacts the side of the slope G1 ; then, the edge portion of the curtain sheet 300 slides along the slope G1 away from the first frame 104 . Therefore, the side surfaces of the curtain sheet 300 (such as the following sides) do not come into contact with the first frame 104 , nor do they come into contact with the second frame 105 . The horizontal distance between the contact position of the edge portion of the screen 300 and the slope G1 and the flexible carrier 200 is L3, and the value of L3 is significantly smaller than the value of L1. In this way, the moment at the contact position between the edge portion of the curtain sheet 300 and the slope G1 is small, which can effectively prevent debonding of the edge portion of the curtain sheet 300 .

The slope G1 on the side of the screen protection structure 108 close to the screen 300 has a rounded corner J on the side away from the first frame 104 . In this way, when the expansion phenomenon of the curtain sheet 300 occurs, the edge portion of the curtain sheet 300 slides along the slope G1 in a direction away from the first frame 104 . The back surface H of the edge portion of the curtain sheet 300 is in contact with the fillet J on the side of the slope G1 away from the first frame 104 . In this way, setting the fillet J can also effectively reduce the probability that the side of the slope G1 away from the first frame 104 will scratch the back H of the edge portion of the curtain sheet 300 .

For example, referring to FIG. 11 , the included angle β between the slope G1 on the side close to the curtain 300 of the curtain protection structure 108 and the target plane ranges from 15 degrees to 30 degrees. When the curtain sheet 300 is thermally expanded and the edge of the curtain sheet 300 is in contact with the inclined surface G1, the supporting force generated by the inclined surface G1 on the curtain sheet 300 is small, which can effectively prevent the undesirable phenomenon of degumming at the edge of the curtain sheet 300. .

In still some embodiments, referring to FIG. 13 and FIG. 14 , the end surface G of the curtain sheet protection structure 108 facing away from the second sheet structure 1052 is coplanar with the back surface H of the curtain sheet 300 .

When the curtain sheet 300 is heated and expanded, since the back surface H of the curtain sheet 300 is in coplanar contact with the end surface G, the edge portion of the curtain sheet 300 will slide along the curtain sheet protection structure 108 and move away from the first frame 104 . Therefore, the side surfaces of the curtain sheet 300 (the following sides) will not contact the first frame 104 or the second frame 105 , thereby effectively avoiding bulges at the edges of the curtain sheet 300 .

When the curtain sheet 300 shrinks due to cold, the edge portion of the curtain sheet 300 will not be in contact with the first frame 104, nor will it be in contact with the second frame 105, that is, the edge portion of the curtain sheet 300 can be placed on the flexible carrier 200 normally. The upper shrinkage can effectively avoid the undesired phenomenon of degumming at the edge of the curtain sheet 300. In addition, the screen protection structure 108 can support the edge of the screen 300 , thereby ensuring the flatness of the edge of the screen 300 .

For example, the side of the screen protection structure 108 away from the second sheet structure 1052 has a convex arc surface G2. When the curtain sheet 300 is thermally expanded, the edge portion of the curtain sheet 300 will more easily slide along the arc surface G2 in a direction away from the first frame 104 .

In some embodiments, as shown in FIG. 14 , the arc of the arc surface G2 is 180°. The arc of the arc surface G2 on the side away from the second sheet structure 1052 of the screen protection structure 108 can also be other values. In this way, even if the edge portion of the curtain sheet 300 is bent, when the edge portion of the curtain sheet 300 slides on the arc surface G2, the side of the curtain sheet protection structure 108 away from the second sheet structure 1052 can be effectively reduced. The probability of scratching the back H of the screen 300.

In a direction parallel to the curtain sheet 300 , the side surfaces (such as the upper side) of the curtain sheet 300 protrude beyond the part of the flexible carrier 200 in the through groove 103 . In this way, the screen 300 can shield the flexible carrier 200 bent to the back of the first frame 104 through the slot 103 , which can effectively prevent the screen 300 from being skewed when it is attached to the flexible carrier 200 .

In some embodiments, referring to FIG. 5 , the orthographic projection of the channel 103 on the target plane lies within the orthographic projection of the screen 300 on the target plane. In other embodiments, the orthographic projection of the curtain protection structure 108 on the target plane is within the orthographic projection of the curtain 300 on the target plane. In this way, the edge portion of the curtain sheet 300 can shield the notch of the through groove 103 , and then can play a role of modifying the front of the first frame 104 and the second frame 105 .

In some embodiments, referring to FIG. 8 and FIG. 9 , the first frame 104 includes a plurality of frames 1011 , and each frame 1011 has a through slot 103 . The number of through slots 103 on each frame 1011 can be the same or different.

Exemplarily, the first frame 104 includes four frames 1011, and ends of two adjacent frames 1011 are connected to each other. In this way, four frames 1011 can form a rectangular frame. When each frame 1011 has a plurality of through slots 103 , the plurality of through slots 103 may be arranged at intervals (such as uniformly or unevenly) along the length direction of the corresponding frame 1011 . In this way, the length of each through-slot 103 in the plurality of through-slots 103 can be shortened, the rigidity of the frame 1011 can be effectively improved, and stable support to the flexible carrier 200 and the screen 300 can be realized. The edge portion of the flexible carrier 200 includes a plurality of connection portions 201 corresponding to the plurality of through grooves 103 . The connecting portion 201 is connected to the second side B of the first frame 104 after passing through the corresponding through slot 103 .

In some other embodiments, the frame 1011 includes a through slot 103 , that is, a strip-shaped through slot 103 whose length is approximately equal to that of the frame 1011 . The edge portion of the flexible carrier 200 includes a connecting portion 201 .

In some embodiments, the ends of the frames 1011 have cavities E. The first frame 104 also includes an angle iron 1012, a part of the angle iron 1012 is located in the cavity E of one of the two adjacent frames 1011, and the other part of the angle iron 1012 is located in the other of the two adjacent frames 1011 In the cavity E of the frame 1011. The angle iron 1012 has a planar structure and has threaded holes. The ends of the two adjacent frames 1011 have through holes corresponding to the threaded holes. The fixing screws pass through the through holes and screw into the corresponding threaded holes, so that the adjacent The fixed connection of the two frames 1011 further realizes the fixed connection of multiple frames 1011 in the first frame 104 .

In some embodiments, the projection screen 001 further includes a first tensioning mechanism 400 and a second tensioning mechanism 600 disposed on opposite sides of the projection screen 001 . The first tensioning mechanism 400 and the second tensioning mechanism 600 can adjust the tension of the flexible carrier 200 , and then can adjust the tension of the curtain sheet 300 . For example, the first tensioning mechanism 400 and the second tensioning mechanism 600 can adjust the tension of the flexible carrier 200 in the short side direction (for example, the Y-axis direction) of the flexible carrier 200; or, adjust the flexible carrier 200 in the flexible The tension in the direction of the long side of the carrier 200 (for example, the direction of the Z axis).

For example, referring to FIG. 5 , one end of the first tensioning mechanism 400 is connected to the edge portion of the flexible carrier 200 passing through the slot 103 , and the other end of the first tensioning mechanism 400 is connected to the second side B of the first frame 104 . The first tensioning mechanism 400 includes: a first tensioning member 4011 and a first support rod 4012 . One end of the first tensioning member 4011 is connected to the first support rod 4012 , and the other end 4011 of the first tensioning member 4011 is connected to the second side B of the first frame 104 . The first support rod 4012 is connected to the edge portion of the flexible carrier 200 along the length direction of the frame 1011 .

Exemplarily, the edge portion of the flexible carrier 200 has an accommodating portion B1 , that is, the edge portion of the flexible carrier 200 passes through the slot 103 to the back of the first frame 104 to form the accommodating portion B1 . The accommodating portion B1 has an opening through which one end of the first tensioning member 4011 is connected to the first support rod 4012 . There is a first support rod 4012 in the accommodating portion B1 corresponding to the position of the frame 1011 in the first frame 104 . In this way, through the overall support of the first support rod 4012 to the edge portion of the flexible carrier 200, and then through the first tension member 4011 to tighten the first support rod 4012, the support of the first tension member 4011 to the flexible carrier 200 can be realized. The overall tension of the edge part ensures the uniformity of tension on the flexible carrier 200, avoids the phenomenon of wrinkles on the flexible carrier 200 due to the large local tension, and then avoids the curtain sheet 300 bonded to the flexible carrier 200. Wrinkles appear.

In some embodiments, referring to FIG. 10 , one end of the second tensioning mechanism 600 is connected to the edge portion of the flexible carrier 200 , and the other end of the second tensioning mechanism 600 is connected to the second end B of the first frame 104 . The second tensioning mechanism 600 includes a second tensioning member 6011 and a second support rod 6012 . One end of the second tensioning member 6011 is connected to the second support rod 6012 , and the other end of the second tensioning member 6011 is connected to the first frame 104 . The second support rod 6012 is connected to the edge portion of the flexible carrier 200 .

In some embodiments, at least one of the first tension member 4011 and the second tension member 6011 is a tension spring. For example, when the first tension member 4011 is a tension spring, one end of the tension spring is connected to the first support rod 4012 through a hook, and the other end of the tension spring is connected to the second side B of the first frame 104 through a hook. . When the above-mentioned second tensioning member 6011 is a tension spring, its arrangement method is similar to that of the above-mentioned first tensioning member 4011 , which will not be repeated here.

In some embodiments, referring to FIG. 15 , the screen 300 includes a first region H1 (such as a central region) connected to the flexible carrier 200 , and a second region H2 (such as an edge region) located on the periphery of the first region H1 . The first region H1 and the second region H2 are located on the back surface H of the screen 300 . Referring to FIG. 14, the projection screen 001 further includes a protective layer 500 located in the second area H2 in the periphery of the first area H1. Exemplarily, the protective layer 500 is a film layer made of optical glue or acrylic glue.

The above is the description of the frame structure of the projection screen 001 , and the structure of each film layer of the screen sheet 300 will be described below.

In the field of projection display, especially the field of ultra-short-focus laser projection display, in order to achieve better brightness and display effect, the optical engine is generally used with a screen with a Fresnel microstructure. Fresnel lens, also known as threaded lens, is a thin sheet made of polyolefin material or glass. Big concentric circles. Microstructure refers to the structure that can only be observed with the help of optical microscope or electron microscope. The Fresnel microstructure includes a plurality of Fresnel lenses.

Referring to Fig. 16 , in the related art, the above-mentioned curtain sheet includes a surface layer 301', a colored layer 102', a diffusion layer 103', a Fresnel lens layer 303' and a reflective layer 304' arranged in sequence. The surface layer 301' is used to protect the screen. The colored layer 102' includes a colored base layer and a dark dye disposed in the colored base layer for improving the contrast of the screen. Diffusion layer 103 'comprises diffusion base layer and the diffusion particle 305 ' that is arranged in the diffusion base layer, and diffusion particle 305 ' can be PMMA (Polymethyl Methacrylate, polymethyl methacrylate), and diffusion layer 103 ' is used for diffusing along different directions The light that enters the screen. The side of the Fresnel lens layer 303' away from the diffusion layer 103' is provided with a reflective surface 3031', the reflective layer 304' is coated on the reflective surface 3031', and the reflective layer 304' is generally coated on the Fresnel lens layer 303 ' on a metal layer.

For the screen in the related art, due to the characteristics of the microstructure in the Fresnel lens layer 303', the light emitted by the optical engine 2 will move closer to the middle after being reflected by the reflective layer 304'. While increasing the gain of the screen, It inevitably reduces the viewing angle of the screen, which in turn affects the viewing experience of the audience.

To this end, some embodiments of the present disclosure provide a screen. Referring to FIG. 17 , in some embodiments, a curtain sheet 300 includes a surface layer 301 , a support layer 302 , a Fresnel lens layer 303 and a reflective layer 304 arranged in sequence.

The surface of the surface layer 301 away from the Fresnel lens layer 303 is provided with a plurality of light-transmitting protrusions 3011, and the intersection lines of the surface of the light-transmitting protrusions 3011 and a plurality of set vertical planes have a first curve segment 311, set The vertical plane is perpendicular to the curtain sheet 300 . Let the vertical plane be a hypothetical reference plane that does not exist in the screen 300 . The set vertical plane is configured such that the set vertical plane is perpendicular to the screen sheet 300 when the screen sheet 300 is unfolded along a certain vertical plane.

In addition, the present disclosure does not limit the number of the first curve segments 311 . In fact, since the surface of the light-transmitting protrusion 3011 is a continuous surface, there should be an infinite number of intersection lines between the vertical plane and the light-transmitting protrusion 3011 having the first curve segment 311 .

In addition, the first curve segment 311 is not limited to a part of the intersection line between a specific set vertical plane and the surface of the light-transmitting protrusion 3011, each set vertical plane may intersect the surface of the light-transmitting protrusion 3011 A first curve segment 311 is formed.

According to the screen sheet 300 of some embodiments of the present disclosure, since the intersection line of the surface of the light-transmitting protrusion 3011 and a plurality of set vertical planes has a first curved segment 311, compared with a straight line, this makes the light-transmitting protrusion The surface of the protrusion 3011 tends to have a more complex line pattern extending in the up and down direction, which makes the incident angles of the light rays pass through the surface of the light-transmitting protrusion 3011 corresponding to the first curved segment 311 more diverse, and the light rays after exiting There are more directions, and the light covers a wider range in the up and down direction after being emitted, so as to realize greater diffusion of light in the up and down direction, and the viewing angle of the screen 300 in the up and down direction is also larger.

In addition, the light-transmitting protrusions 3011 are provided so that the surface of the surface layer 301 away from the Fresnel lens layer 303 has a higher roughness, which also has a certain weakening effect on ceiling reflection.

For example, referring to FIG. 18 , ignoring the refraction of light between various film layers in the screen 300 , the light emitted by the optical engine 2 extends along the direction indicated by the dotted line and the arrow in FIG. 18 . The direction of the emitted light in the following figures is only for illustration, and it is not intended to limit that the light must be emitted in the direction shown in the figure.

After the light is reflected by the reflective layer 304, it will exit along the thickness direction of the curtain sheet 300. When it passes through the surface of the light-transmitting protrusion 3011 on the surface layer 301, because the surface of the light-transmitting protrusion 3011 tends to extend in the vertical direction. It is more complicated, so the light will be refracted when passing through the surface of the light-transmitting protrusion 3011, so that the light can be diffused in the up and down direction, and then the viewing angle of the screen 300 in the up and down direction is larger.

On the contrary, referring to FIG. 19, after removing the light-transmitting protrusion 3011, the light emitted by the optical engine 2 extends along the direction indicated by the dotted line and the arrow in FIG. The light is emitted along the surface perpendicular to the surface layer 301 away from the Fresnel lens layer 303 without refraction, and the light cannot be diffused in the up and down direction, so the viewing angle in the up and down direction is small.

The expression "tends to extend in the up and down direction" is used above to illustrate that it does not limit the surface of the light-transmitting protrusion 3011 to only extend in the up-and-down direction, and the surface of the light-transmitting protrusion 3011 will approach and/or Extend away from the Fresnel lens layer 303 .

In order to further improve the viewing angle of the screen 300 in the up-and-down direction, referring to FIG. The first progressive segment 311A and the first progressive segment 311B extend away from the Fresnel lens layer 303 along a preset direction (eg, from top to bottom). For example, the first progressive segment 311A is connected to the first progressive segment 311B. In this way, the line shape of the surface of the light-transmitting protrusion 3011 tending to extend in the up-and-down direction is more complicated (that is, the surface line shape of the light-transmitting protrusion 3011 is more complicated), further increasing the direction of the light after it is emitted. The range covered in the direction is wider, thereby expanding the viewing angle of view of the screen 300 in the up and down direction.

There may be multiple first progressive segments 311A and first progressive segments 311B. The more the first asymptotic segment 311A and the first asymptotic segment 311B included in the first curved segment 311, the more complicated the line shape of the surface of the light-transmitting protrusion 3011 tends to extend in the up-down direction, and the screen sheet 300 in the up-down direction The viewing angle is larger.

Referring to FIG. 20 , taking the first curve segment 311 including two first asymptotic segments 311A and two first asymptotic segments 311B as an example, the light emitted by the optical engine 2 extends along the direction indicated by the dotted line and the arrow in FIG. 20 , because The surface of the light-transmitting protrusion 3011 tends to have a more complicated line pattern extending in the up-down direction (compared to the light-transmitting protrusion 3011 shown in FIG. 18 ), so the light can diffuse in a wider range in the up-down direction after being emitted. , so that the viewing angle of the projection screen 001 in the up and down direction is larger.

In the entire screen 300 , at least a part of the first curve segment 311 corresponding to the light-transmitting protrusion 3011 is provided with a first progressive segment 311A and a first progressive segment 311B according to the above rules.

In some embodiments, the first curved segment 311 may also have only the first asymptotic segment 311A, or only the first asymptotic segment 311B, which is not limited in the present disclosure.

In order to improve the viewing angle of the screen 300 in the horizontal direction, referring to FIG. 21, in some embodiments, the intersection of the surface of the light-transmitting protrusion 3011 and a plurality of set horizontal planes has a second curved segment 312, and the set horizontal plane is vertical. On screen 300.

The horizontal plane is assumed to be a hypothetical reference plane that does not exist in the screen 300 . The set horizontal plane is configured such that the set horizontal plane is perpendicular to the screen sheet 300 when the screen sheet 300 is unfolded along a certain vertical plane.

The second curve segment 312 includes a second progressive segment 312A and a second progressive segment 312B. The structures, arrangements and beneficial effects of the second curved section 312, the second asymptotic section 312A, and the second asymptotic section 312B are similar to those of the first curved section 311, the first asymptotic section 311A, and the first asymptotic section 311B, respectively, I won't repeat them here.

When the screen 300 is unfolded on a vertical plane, the need to expand the viewing angle in the second direction (such as the left-right direction) is greater than the need to expand the viewing angle in the first direction (such as the up-down direction) during use. The first direction and the second direction are perpendicular to each other. For this reason, in some embodiments, as shown in FIG. 24 , on the surface layer 301 , the maximum dimension M of the orthographic projection of the light-transmitting protrusion 3011 in the first direction is larger than the orthographic projection of the light-transmitting protrusion 3011 in the second direction. The largest dimension N in the direction. Thus, the screen 300 can be provided with more light-transmitting protrusions 3011 along the left and right directions, thereby making the line shape of the surface of the screen 300 in the left and right directions more complicated, so that the screen 300 can move horizontally in the left and right directions. It is more obvious that the viewing angle is enlarged.

Exemplarily, the size of the light-transmitting protrusion 3011 in the first direction is set to be 2 to 10 times the size of the light-transmitting protrusion 3011 in the second direction. In this way, the line shape of the surface of the screen 300 in the second direction can be made more complex, so that the viewing angle of the screen 300 in the second direction can be expanded more clearly.

With reference to Fig. 17, the side away from support layer 302 of Fresnel lens layer 303 is provided with a plurality of reflective surfaces 3031, and a plurality of reflective surfaces 3031 are arranged along the up-down direction, and each reflective surface 3031 is along the front view direction (ie Fresnel The Fresnel lens layer 303 is away from the direction of the light-transmitting protrusion 3011), along a predetermined direction (such as from top to bottom) to the plane inclined to the Fresnel lens layer 303 away from the direction of the light-transmitting protrusion 3011, and each reflective surface 3031 and the horizontal plane The included angle θ can be the same, or can become larger from top to bottom, so that the light emitted by the optical engine 2 can be directionally reflected by the reflective surface 3031 out of the screen 300 without causing random reflection of the light, so that the screen 300 has a higher gain.

The material of each film layer of the curtain sheet 300 will be described below.

In some embodiments, the Fresnel lens layer 303 is made by curing UV glue (Ultraviolet Rays, shadowless glue). Because the UV glue has elasticity, the Fresnel lens layer 303 can be curled. In some other embodiments, the Fresnel lens layer 303 can also be made of thermosetting glue.

In some embodiments, the reflective material in reflective layer 304 is aluminum. In other embodiments, the reflective material in the reflective layer 304 is silver, or a combination of silver and aluminum.

Taking aluminum as the reflective material as an example, referring to FIG. 22 , in some embodiments, in order to increase the gain of the curtain sheet 300, the reflective layer 304 is made of powdered aluminum, and the diameter of the aluminum particles in the powdered aluminum ranges from 5 μm to 20 μm. . Since the diameter of the aluminum particles is small, the directionality of the light reflected by the aluminum particles is not obvious, and most of the light emitted by the optical engine 2 can be directionally reflected out of the curtain sheet 300 according to the setting of the reflective surface 3031 on the Fresnel lens layer 303 , without causing random reflection of light, so that the gain of the screen 300 is relatively high. In addition, when covering the reflective surface 3031, the mutual interference between aluminum particles is small, and the thickness of the reflective layer 304 can be reduced under the requirement of fully covering the reflective surface 3031; and the consumption of powdered aluminum can be reduced, thereby saving costs .

Referring to FIG. 23 , in some other embodiments, the reflective layer 304 is made of flaky aluminum powder, and the flaky aluminum powder has a circular flake structure. Due to the large aspect ratio (ratio of diameter to thickness) of the scaly aluminum powder, the scaly aluminum powder has a strong binding ability with the binder (such as the solvent in the aluminum powder solution) in the aluminum reflective layer, thereby reducing the The probability of aluminum particles falling off in the aluminum reflective layer.

The provision of the surface layer 301 can prevent the surface of the screen sheet 300 from being scratched, so as to ensure the display effect of the projection screen 001 . The surface layer 301 is made of flexible material. Exemplarily, the surface layer 301 is made by curing UV glue.

In some embodiments, the material of the support layer 302 is PU (Polyurethane, polyurethane). PU is flexible and can be curled arbitrarily without deformation, and has the advantages of wear resistance, high temperature resistance, high toughness, oil resistance, and strong mechanical properties. Using PU to make the support layer 302 can make the support layer 302 flexible and curlable. The support layer 302 can also be made of other flexible materials. In some other embodiments, for example, the support layer 302 is made of TPU (Thermoplastic Polyurethanes, thermoplastic polyurethane elastomer rubber), PET (Polyethylene Terephthalate, polyterephthalate plastics), SBC (Styrenic Block Copolymers, styrene-based thermoplastic elastomer) Body, also known as styrene-based block copolymer), PVC (Polyvinyl Chloride, polyvinyl chloride), PE (Polyethene, polyethylene) and other flexible materials, using the above materials to make the support layer 302, can also make the support layer 302 Flexible and curlable. In this way, the surface layer 301, the support layer 302, the Fresnel lens layer 303 and the reflective layer 304 can be curled, so the curtain sheet 300 can be curled, and the convenience of the curtain sheet 300 during transportation, installation and use can be improved.

In other embodiments, the support layer 302 can also be made of hard materials such as PP (Polypropylene, polypropylene), MS (Methyl Methacrylate-styrene Copolymer, methyl methacrylate-styrene copolymer).

In order to expand the viewing angle of the screen 300 more clearly, in some embodiments, a plurality of light-transmitting protrusions 3011 are arranged in multiple rows and columns, each row includes a plurality of light-transmitting protrusions 3011, and each column includes a plurality of light-transmitting protrusions 3011. a light-transmitting protrusion 3011. As a result, the number of light-transmitting protrusions 3011 on the screen 300 is relatively large, which increases the complexity of the line pattern on the surface of the screen 300 , thereby making the viewing angle of the screen 300 more obvious.

In some other embodiments, the light-transmitting protrusions 3011 are only arranged in one column, and the column includes a plurality of light-transmitting protrusions 3011 , that is, only one light-transmitting protrusion 3011 is arranged in each row.

In order to simplify the special mold for making the surface layer 301 , referring to FIG. 24 , in some embodiments, the light-transmitting protrusions 3011 are arranged in a rectangular array. That is, the number of light-transmitting protrusions 3011 in each row is the same, and the number of light-transmitting protrusions 3011 in each column is also the same. In this way, the regularity of the light-transmitting protrusions 3011 on the surface layer 301 is relatively high, thereby reducing the structural complexity of the special mold, thereby helping to reduce the design and production costs of the special mold.

In some embodiments, at least some of the light-transmitting protrusions 3011 have the same shape and size, which can further reduce the manufacturing cost and design cost of the special mold.

In some embodiments, as shown in FIG. 24 , in each column of light-transmitting protrusions 3011 , there is an interval between two adjacent light-transmitting protrusions 3011 , and in each row of light-transmitting protrusions 3011 , two adjacent light-transmitting protrusions 3011 There are also intervals between the protrusions 3011 .

In other embodiments, referring to FIG. 25, in each column of light-transmitting protrusions 3011, two adjacent light-transmitting protrusions 3011 are directly connected to each other, that is, two adjacent light-transmitting protrusions 3011 are bonded together; the same In each row of light-transmitting protrusions 3011, two adjacent light-transmitting protrusions 3011 are directly connected to each other, that is, two adjacent light-transmitting protrusions 3011 are bonded together.

In some embodiments, referring to FIG. 17, the support layer 302 is a single membrane layer. In some other embodiments, referring to FIG. 26 , the supporting layer 302 includes two supporting base layers 3021 , and the two supporting base layers 3021 are adjacent and stacked. In this case, the surface layer 301 is formed on the side of one of the supporting base layers 3021 , and the Fresnel lens layer 303 is formed on the side of the other supporting base layer 3021 .

In order to further improve the viewing angle of the screen 300 , at least one of the surface layer 301 , the support layer 302 and the Fresnel lens layer 303 is distributed with diffusion particles. For example, referring to FIG. 26 , the diffusion particles 305 are distributed in the support layer 302 and located in the support base layer 3021 close to the Fresnel lens layer 303 . Therefore, the supporting base layer 3021 close to the Fresnel lens layer 303 can also be regarded as the diffusion layer of the screen 300 .

In some other embodiments, the diffusion particles 305 are disposed in the support base layer 3021 close to the surface layer 301 , or the diffusion particles 305 are disposed in the surface layer 301 , the support layer 302 and the Fresnel lens layer 303 . Setting the diffusing particles 305 can make the light diffused by the diffusing particles 305 when passing through the screen 300 , thereby expanding the viewing angle of the screen 300 .

In some embodiments, in order to improve the contrast of the screen 300 , one of the surface layer 301 , the support layer 302 , the Fresnel lens layer 303 and the reflective layer 304 is provided with a dark dye distributed therein. Dark dyes are organic dyes, and azo dyes, phthalocyanine dyes, etc. can be used. For example, the dark dye is distributed in the supporting layer 302 and in the supporting base layer 3021 close to the surface layer 301 , thus, the supporting base layer 3021 close to the surface layer 301 is also equivalent to forming the colored layer of the curtain sheet 300 . Of course, in some other embodiments, the dark dye is distributed in the supporting base layer 3021 close to the Fresnel lens layer 303 .

When the dark dye is arranged in the reflective layer 304, on the basis of improving the contrast of the screen 300, the light is only absorbed by the dark dye when it is reflected at the reflective layer 304, so the energy loss is small, and then the screen is made 300 is brighter when in use. In addition, the dark dye makes the aluminum powder slightly agglomerate in the solvent (when the reflective layer 304 is made, the aluminum powder can be dissolved in the solvent, and then sprayed on the reflective surface 3031 of the Fresnel lens layer 303), so that the reflective layer The flatness of the 304 is slightly reduced, and the light can be scattered to a greater extent when it is irradiated on the reflective layer 304, so that the degree of light diffusion can be improved. The dark dye as organic dye can be dissolved in high molecular polymer and organic solvent, and Fresnel lens layer 303 is made by UV glue, and UV glue is a kind of high molecular polymer, and this just makes dark dye and Fresnel The bonding force of the lens layer 303 is relatively strong, so that the overall adhesion of the reflective layer 304 on the Fresnel lens layer 303 is relatively high.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

The above descriptions are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the present disclosure. within the scope of protection. Therefore, the protection scope of the present disclosure should be determined by the protection scope described in the claims.

Claims

A projection device comprising:

A projection screen configured to display a projection screen, the projection screen comprising:

A frame, the frame includes a first frame, the first frame has a first side and a second side, the first side is the side of the first frame away from the center of the projection screen, and the second side is the side of the projection screen A side of the first frame close to the center of the projection screen;

a flexible carrier, the flexible carrier is attached to the front of the first frame;

a curtain, the curtain is connected to the surface of the flexible carrier away from the first frame;

a curtain protection structure, the curtain protection structure is arranged on the first side of the first frame, and is configured to make the edge portion of the curtain be on the screen after the curtain is expanded by heat; sliding over the sheet protection structure; and

The optical engine is configured to emit light beams to the projection screen.
The projection device according to claim 1, wherein the screen protection structure is configured such that after the screen is thermally expanded, the edge portion of the screen is on the screen protection structure and faces away from the screen protection structure. slide in the direction of the first frame.
The projection device according to claim 2, wherein the screen protection structure comprises a protrusion structure fixedly connected to the first side of the first frame;

The first frame includes a through groove, and the through groove is arranged between the protruding structure and the first frame; the edge portion of the flexible carrier passes through the through groove, and the flexible carrier the edge portion is connected to the second side of the first frame;

Wherein, the raised structure includes a supporting surface, and the supporting surface is located on the same side as the front side of the first frame; the supporting surface includes a first side and a second side; the first side The side is located on a side of the support surface close to the first frame, and the second side is located on a side of the support surface away from the first frame;

In a direction perpendicular to the screen, the first side is located between the screen and the first frame, and the screen is located between the second side and the first frame .
The projection device according to claim 3, wherein, in a direction parallel to the screen, a side surface of the screen protrudes from a portion of the flexible carrier in the through groove.
The projection device according to claim 4, wherein the orthographic projection of the channel on the target plane is located within the orthographic projection of the screen on the target plane, and the target plane is parallel to the screen. plane.
The projection device according to claim 3, wherein the first side has rounded corners;

The supporting surface is an inclined plane or curved surface.
The projection device according to claim 3, wherein the first frame comprises a plurality of frames, and the frames have the through grooves;

The edge portion of the flexible carrier includes a plurality of connection parts, the plurality of connection parts correspond to the plurality of through-slots, and the connection parts pass through the corresponding through-slots and connect with the second part of the first frame. side connection.
The projection device according to claim 7, wherein the frame has a plurality of through-slots, and the plurality of through-slots on the frame are arranged at intervals along the length direction of the frame.
The projection device according to claim 3, further comprising a tensioning mechanism, the tensioning mechanism satisfies at least one of the following:

One end of the tensioning mechanism is connected to the edge portion of the flexible carrier passing through the slot, and the other end is connected to the second side of the first frame; or

One end of the tensioning mechanism is connected to the edge portion of the flexible carrier, and the other end is connected to the second side of the first frame.
The projection device according to claim 2, wherein said edge portion of said flexible carrier is folded over to wrap said first side of said first frame; said frame further comprises a second frame; said second Framework includes:

a first sheet-like structure attached to a side of the first frame remote from the curtain sheet; and

a second sheet-like structure, the second sheet-like structure is interconnected with the first sheet-like structure; the second sheet-like structure wraps the side of the component composed of the first frame and the flexible carrier, And the screen protection structure is disposed at an end of the second sheet structure away from the first sheet structure.
The projection device according to claim 10, wherein, in a direction perpendicular to the screen, the end surface of the screen protection structure facing away from the second sheet structure is further away from the back surface of the screen the first frame.
The projection device according to claim 11, wherein a side of the screen protection structure close to the screen has a slope, and at least part of the screen protection structure is in a direction perpendicular to the screen. The width increases along a direction perpendicular to the first sheet structure and away from the center of the projection screen.
The projection device according to claim 10, wherein the end surface of the screen protection structure facing away from the second sheet structure is coplanar with the back surface of the screen;

An end of the curtain protection structure away from the second sheet structure has a convex arc surface.
The projection device according to claim 13, wherein the orthographic projection of the screen protection structure on a target plane is located within the orthographic projection of the screen on the target plane, the target plane being parallel to the The plane of the screen.
The projection device according to any one of claims 1 to 10, wherein the screen comprises:

a first region connected to the flexible carrier; and

a second area, the second area is located on the periphery of the first area;

The first area and the second area are located on the back of the screen; the projection screen further includes a protective layer located at least a part of the second area.
The projection device according to any one of claims 1 to 10, wherein the screen comprises a surface layer, a supporting layer, a Fresnel lens layer and a reflective layer arranged in sequence;

The surface of the surface layer away from the Fresnel lens layer is provided with a plurality of light-transmitting protrusions, the intersection of the surface of the light-transmitting protrusions and a plurality of set vertical planes has a first curve segment, the Set the vertical plane perpendicular to the projection screen.
The projection device according to claim 16, wherein the first curve segment comprises:

a first progressive segment extending in a predetermined direction close to the Fresnel lens layer; and

A first progressive segment extending away from the Fresnel lens layer along the preset direction; wherein, the first curved segment satisfies at least one of the following:

The first curve segment includes a plurality of first asymptotic segments; or, the first curve segment includes a plurality of first asymptotic segments.
The projection device according to claim 16, wherein, on the surface layer, the maximum size of the orthographic projection of the light-transmitting protrusions in the first direction is larger than the orthographic projection of the light-transmitting protrusions in the second direction The largest dimension on ; the first direction and the second direction are perpendicular to each other.
The projection device according to claim 16 or 17, wherein the projection screen comprises a plurality of rows and columns of the light-transmitting protrusions.
According to the projection device according to claim 16 or 17, the projection screen satisfies at least one of the following:

The projection screen also includes diffusing particles disposed in at least one of the surface layer, the support layer, or the Fresnel lens layer; or

The projection screen also includes a dark dye disposed in one of the surface layer, the support layer, the Fresnel lens layer, or the reflective layer.