Diffuser assembly, beam spot clearing device, and projector

Abstract

This disclosure relates to a diffuser assembly, a beam speckle reduction device, and a projector. The diffuser assembly includes a first movable layer, a base, a first elastic element, a second elastic element, and a diffuser. A driving unit includes a first driving unit and a second driving unit. The first elastic element connects the diffuser and the first movable layer and is deformable along a first direction parallel to the diffuser, allowing the diffuser to move relative to the first movable layer along the first direction. The second elastic element connects the first movable layer and the base and is deformable along a second direction parallel to the diffuser, allowing the first movable layer and the diffuser to move relative to the base along the second direction. The first driving unit drives the diffuser to move relative to the first movable layer along the first direction, and the second driving unit drives the first movable layer and the diffuser to move relative to the base along the second direction. The first and second directions intersect. The diffuser exhibits a high number of random phases per unit time, resulting in good speckle reduction.

Description

Technical Field

[0001] This disclosure relates to the field of projection display technology, specifically to a diffuser assembly, a beam spot clearing device, and a projector. Background Technology

[0002] Beam projection display technology can most realistically reproduce the rich and gorgeous colors of the objective world and provide stunning expressiveness. Among them, eliminating speckle is a popular research topic in beam projection technology. Its principle is mainly to reduce the spatial and temporal coherence of the beam.

[0003] Existing beam speckle reduction structures mostly employ rotating diffuser wheels. Their principle is based on the superposition of multiple independent speckle patterns per unit time. With a fixed rotation speed, increasing the number of random phases of the diffuser per unit time yields better speckle reduction. Diffusers closer to the beam source are used to eliminate smaller spots, requiring smaller diffuser sizes. However, for rotating diffuser wheels, smaller diffusers provide fewer random phases, resulting in poor speckle reduction. Furthermore, increasing the size of the diffuser wheel requires a larger rotating wheel, limiting the practical application area and preventing the maximization of the diffuser's application area, thus leading to poor speckle reduction. Summary of the Invention

[0004] The purpose of this disclosure is to provide a diffuser assembly, a beam speckle elimination device, and a projector. The diffuser assembly can increase the number of random phases of the diffuser per unit time, resulting in a good speckle elimination effect.

[0005] To achieve the above objectives, this disclosure provides a diffuser assembly for use in a beam spot clearing device of a projector. The diffuser assembly includes a first movable layer, a base, a first elastic element, a second elastic element, a second movable layer, and a diffuser for the beam to pass through. The diffuser is disposed on the second movable layer, and the driving part includes a first driving part and a second driving part.

[0006] The first elastic element connects the first movable layer and the second movable layer, and the first elastic element can support the second movable layer in the beam penetration direction. The first movable layer covers the second movable layer and the two are spaced apart in the first direction.

[0007] The first elastic element is configured to deform along a first direction parallel to the diffuser sheet, so that the second movable layer can move relative to the first movable layer along the first direction;

[0008] The second elastic element connects the first movable layer and the base, and the second elastic element can support the first movable layer in the beam penetration direction;

[0009] The second elastic element is configured to deform along a second direction parallel to the diffuser sheet, so that the first movable layer and the diffuser sheet can move relative to the base along the second direction;

[0010] The first driving unit is used to drive the second moving layer to move relative to the first moving layer in the first direction within the first moving layer; the second driving unit is used to drive the first moving layer and the second moving layer to move relative to the base in the second direction; wherein the first direction and the second direction intersect.

[0011] Optionally, the first moving layer is constructed as a frame structure, the second moving layer is disposed within the frame structure and spaced apart from the frame structure in the first direction, and the first moving layer and the base are spaced apart in the beam penetration direction;

[0012] The first driving unit is used to drive the second moving layer to reciprocate within the frame structure and relative to the frame structure in the first direction, and the second driving unit is used to drive the first moving layer and the second moving layer to reciprocate relative to the base in the second direction.

[0013] Optionally, the frame structure includes a first frame plate, a second frame plate, a third frame plate, and a fourth frame plate connected sequentially end to end. The first frame plate and the third frame plate are arranged opposite each other along the first direction, and the second frame plate and the fourth frame plate are arranged opposite each other along the second direction. The second movable layer includes two first outer surfaces arranged opposite each other along the first direction. The two first outer surfaces are respectively spaced apart from the first frame plate and the third frame plate along the first direction.

[0014] Optionally, the first elastic element includes two first springs, one of which is disposed between the first outer side and the first frame plate, and the other of which is disposed between the other first outer side and the third frame plate; and / or,

[0015] The second elastic element includes two second springs, one of which is opposite to the outer side of the second frame plate, and the other of which is opposite to the outer side of the fourth frame plate.

[0016] Optionally, the first reed includes a first reed body extending along the second direction, one end of the first reed body being connected to the first movable layer and the other end being connected to the second movable layer, and the first reed body being deformable along the first direction; and / or,

[0017] The second reed includes a second reed body extending along the first direction, one end of the second reed body being connected to the second movable layer and the other end being connected to the base, and the second reed body being deformable along the second direction.

[0018] Optionally, the first reed further includes a first support piece connected to the first reed body, the first support piece being connected to the first outer surface; and / or,

[0019] The second reed also includes a second support piece connected to the body of the second reed, and the second support piece is connected to the outer side of the second frame plate or the outer side of the fourth frame plate.

[0020] Optionally, the first reed body has a first elongated opening extending along the second direction and closed at both ends. The first elongated opening includes two first inner edges disposed opposite each other along the second direction. The first support piece is disposed within the first elongated opening, with one end of the first support piece connected to one of the first inner edges, and the other end of the first support piece spaced apart from the other first inner edge along the second direction; and / or,

[0021] The second reed body has a second elongated opening that extends along the first direction and is closed at both ends. The second elongated opening includes two third inner edges that are arranged opposite to each other along the first direction. The second support piece is disposed in the second elongated opening and one end of the second support piece is connected to one of the third inner edges. The other end of the second support piece is spaced apart from the other third inner edge along the first direction.

[0022] Optionally, the first elongated opening further includes two second inner edges arranged opposite each other along the beam penetration direction, and the first support piece and the two second inner edges are spaced apart along the beam penetration direction; and / or,

[0023] The second elongated opening also includes two fourth inner edges arranged opposite each other along the beam penetration direction, and the second support piece and the two fourth inner edges are all spaced apart along the beam penetration direction.

[0024] Optionally, a first slot is formed at each end of the first reed body, a first locking block is provided on the second moving layer, and a second locking block is provided on the first moving layer. The two first slots are respectively engaged with the first locking block and the second locking block; and / or,

[0025] The second reed body has a second slot formed at each end, the first moving layer is provided with a third block, and the base is provided with a fourth block. The two second slots are respectively engaged with the third block and the fourth block.

[0026] Optionally, the first outer surface includes a first portion and a second portion, the first portion being adjacent to and connected to the first support piece, the second portion being provided with a first locking block, and the inner side of the second frame plate or the inner side of the fourth frame plate being provided with a second locking block; and / or,

[0027] The outer side of the second frame plate or the outer side of the fourth frame plate includes a third part and a fourth part. The third part is in close contact with the second support piece, and the fourth part is provided with a third locking block.

[0028] Optionally, the base includes a base frame and a base plate connected to each other; a first opening is formed on the second movable layer, the diffuser sheet is disposed at the first opening, a second opening is formed on the base plate, and the second opening is disposed opposite to the first opening along the beam penetration direction.

[0029] Optionally, the base frame includes a base frame body and base frame side plates connected to each other. The first movable layer and the base frame body are spaced apart in the beam penetration direction. The base bottom plate is sealed inside the base frame body. The base frame side plates extend along the second direction and protrude from the base frame body in the beam penetration direction. The end of the base frame side plate along the second direction is provided with the fourth locking block to engage with the corresponding second locking groove on the corresponding second spring body.

[0030] Optionally, the first driving unit includes a first driving magnet and a first current-carrying conductor disposed opposite to each other, wherein one of the first driving magnet and the first current-carrying conductor is disposed on the second moving layer, and the other is disposed on the base; and / or,

[0031] The second driving part includes a second driving magnet and a second current-carrying conductor disposed opposite to each other, one of the second driving magnet and the second current-carrying conductor being disposed on the first moving layer and the other being disposed on the base.

[0032] Optionally, the base includes a base frame and a base plate;

[0033] Both the first and second energized conductors are disposed on the inner surface of the base plate. A first mounting groove for mounting the first driving magnet is formed on the second movable layer, and a second mounting groove for mounting the second driving magnet is formed on the first movable layer.

[0034] Optionally, the diffuser assembly further includes a flexible circuit board laid on the inner surface of the base plate, wherein the first energized conductor and the second energized conductor are both connected to the flexible circuit board.

[0035] Optionally, the diffuser assembly further includes a controller, a second detection element, and a second detection element. The second detection element is used to detect first motion information of the second moving layer and second motion information of the first moving layer. The second detection element, the second detection element, the first energized conductor, and the second energized conductor are all electrically connected to the controller.

[0036] The controller is used to control the first energized conductor to operate based on the first motion information detected by the second detection element, and to control the second energized conductor to operate based on the second motion information detected by the second detection element.

[0037] Optionally, the first driving magnet includes a first individual magnet and a second individual magnet arranged sequentially along the first direction. The N pole and S pole of the first individual magnet and the second individual magnet are both arranged along the beam penetration direction, and the magnetic pole directions of the first individual magnet and the second individual magnet are opposite.

[0038] The first energized conductor is constructed as a first energized coil. The first energized coil includes two first straight segments that extend along the second direction and are spaced apart along the first direction and have opposite current directions. The two first straight segments are respectively arranged opposite to the first single magnet and the second single magnet.

[0039] And / or, the second driving magnet includes a third individual magnet and a fourth individual magnet arranged sequentially along the second direction, wherein the N pole and S pole of the third individual magnet and the fourth individual magnet are both arranged along the beam penetration direction, and the magnetic pole directions of the third individual magnet and the fourth individual magnet are opposite.

[0040] The second energized conductor is constructed as a second energized coil. The second energized coil includes two second straight segments that extend along the first direction and are spaced apart along the second direction and have opposite current directions. The two second straight segments are respectively arranged opposite to the third single magnet and the fourth single magnet.

[0041] Optionally, the first driving magnet further includes a first neutral layer disposed between the first single magnet and the second single magnet. The first neutral layer is configured such that, during the process of the first driving magnet reciprocating relative to the first energized coil along the first direction, the first neutral layer enables the first straight line segment opposite to the first single magnet to not be opposite to the second single magnet, and enables the first straight line segment opposite to the second single magnet to not be opposite to the first single magnet.

[0042] And / or, the second driving magnet further includes a second neutral layer disposed between the third single magnet and the fourth single magnet; the second neutral layer is configured such that, during the reciprocating movement of the second driving magnet relative to the second energized coil along the second direction, the second neutral layer enables the second straight line segment opposite to the third single magnet to not be opposite to the fourth single magnet, and enables the second straight line segment opposite to the fourth single magnet to not be opposite to the third single magnet.

[0043] Optionally, the diffuser assembly further includes a first guide support member disposed on the first movable layer and supporting the second movable layer within the first movable layer along the beam penetration direction.

[0044] Optionally, the first guide support includes two first guide support columns spaced apart on the first moving layer along the beam penetration direction, and the second moving layer is movably disposed between the two first guide support columns along the first direction.

[0045] Optionally, the diffuser assembly further includes a second guide support member disposed on the base and supporting the first movable layer on the base along the beam penetration direction, and a second elastic member connecting the base and the first movable layer.

[0046] Optionally, the second guide support includes two second guide support columns spaced apart on the base along the beam penetration direction, and the first movable layer is movably disposed between the two second guide support columns along the second direction.

[0047] This disclosure also provides a beam spot removal device, including a beam emitter, a beam shrinking assembly, a beam homogenizing assembly, and a scattering element disposed between the beam shrinking assembly and the beam homogenizing assembly, wherein the scattering element includes the diffuser assembly.

[0048] This disclosure also provides a projector that includes the aforementioned beam spot-reducing device.

[0049] In the above technical solution, the first elastic element can deform along a first direction parallel to the diffuser, and the second elastic element can deform along a second direction parallel to the diffuser. The first and second elastic elements serve both to reset the diffuser and to improve the stability of its movement. Since the principle of dynamic speckle reduction is the superposition of multiple independent speckle patterns per unit time, increasing the number of random phases of the diffuser per unit time yields a better speckle reduction effect. Compared to traditional rotating diffusers, the moving diffuser fully utilizes the different phase divergence angles at all positions on the diffuser, thus better reducing beam coherence and providing a better speckle reduction effect within the same size. As the first and second driving parts drive the diffuser to move along the first and second directions respectively, the number of random phases also increases, improving the area utilization of the diffuser, further reducing beam coherence, and enhancing the speckle reduction effect.

[0050] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0051] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0052] Figure 1 This is an exploded structural diagram of a diffusion sheet assembly according to one embodiment of the present disclosure;

[0053] Figure 2 This is a three-dimensional structural schematic diagram of a diffusion sheet assembly according to one embodiment of the present disclosure;

[0054] Figure 3 This is a top view of a diffusion sheet assembly according to one embodiment of the present disclosure;

[0055] Figure 4 This is a side view of a diffusion sheet assembly according to one embodiment of the present disclosure;

[0056] Figure 5 This is a schematic diagram of a diffuser assembly according to one embodiment of the present disclosure, cut along a second direction.

[0057] Figure 6 This is an exploded structural diagram of a diffusion sheet assembly according to another first embodiment of the present disclosure, wherein the first guide support post and the second guide support post are also shown in the diagram.

[0058] Figure 7 This is a schematic diagram of a beam spot-reducing device according to one embodiment of the present disclosure.

[0059] Explanation of reference numerals in the attached figures

[0060] 10. Diffuser Assembly 101. Diffuser

[0061] 103 First moving layer 1030 Second card block

[0062] 1031 First frame plate 1032 Second frame plate

[0063] 1033 Third frame plate 1034 Fourth frame plate

[0064] 1035 Third Card Block 104 Base

[0065] 1040 Fourth Card Block; 1041 Base Frame

[0066] 10411 Base frame body; 10412 Base frame side plate

[0067] 1042 Base plate 10420 Second opening

[0068] 1043 Flexible Circuit Board

[0069] 105 First elastic element 10501 First inner edge

[0070] 10502 Second inner edge 1051 First spring sheet

[0071] 10510 First slot 10511 First reed body

[0072] 10512 First support piece; 10513 First locking block

[0073] 10514 First Transformer Arm

[0074] 106 Second elastic element 1061 Second spring

[0075] 10610 Second slot 10611 Second spring body

[0076] 10612 Second support plate; 10613 Second deformable arm

[0077] 107 First Drive Unit

[0078] 1071 First driving magnet 10711 First single magnet

[0079] 10712 Second Single Magnet; 10713 First Neutral Layer

[0080] 1072 First current-carrying conductor; 10720 First straight segment

[0081] 108 Second drive unit 1081 Second drive magnet

[0082] 10811 Third individual magnet; 10812 Fourth individual magnet

[0083] 10813 Second neutral layer 1082 Second current-carrying conductor

[0084] 10820 Second straight segment 109 Second moving layer

[0085] 1091 First outer surface 1092 First opening

[0086] 110 First Detection Element

[0087] 111 First guide support component 1110 First guide support column

[0088] 112 Second guide support component; 1120 Second guide support column

[0089] 300 beam emitter 400 beam shrinking assembly

[0090] 500 Beam homogenizer, 600 Beam diffuser Detailed Implementation

[0091] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0092] In this disclosure, unless otherwise stated, directional terms such as "first direction" and "second direction" are used with reference to Figure 1 As shown; the beam penetration direction can also be referenced. Figure 1 As shown; the directional terms used, such as “inner” and “outer”, refer to the inner and outer parts of the specific structural outline, and the terms used, such as “first”, “second”, “third” and “fourth”, are only used to distinguish one element from another and do not have any order or importance.

[0093] Reference Figures 1 to 6As shown, this disclosure provides a diffuser assembly, which includes a first movable layer 103, a base 104, a first elastic element 105, a second elastic element 106, and a diffuser 101 for light beam passage. The driving unit includes a first driving unit 107 and a second driving unit 108. The first elastic element 105 connects the diffuser 101 and the first movable layer 103, and is configured to deform along a first direction A parallel to the diffuser 101, so that the diffuser 101 can move relative to the first movable layer 103 along the first direction A. The second elastic element 106... The first movable layer 103 and the base 104 are connected by a component 106, and the second elastic component 106 is configured to deform along a second direction B parallel to the diffuser 101 so that the first movable layer 103 and the diffuser 101 can move relative to the base 104 along the second direction B; the first driving part 107 is used to drive the diffuser 101 to move relative to the first movable layer 103 along a first direction A, and the second driving part 108 is used to drive the first movable layer 103 and the diffuser 101 to move relative to the base 104 along the second direction B, and the first direction A and the second direction B intersect.

[0094] In the above technical solution, the first elastic element 105 can deform along a first direction A parallel to the diffuser 10, and the second elastic element 106 can deform along a second direction B parallel to the diffuser 101. The first elastic element 105 and the second elastic element 106 can both reset the diffuser and improve the stability of the diffuser 101's movement. Since the principle of dynamic speckle reduction is the superposition of multiple independent speckle patterns per unit time, increasing the number of random phases of the diffuser 101 per unit time can achieve a better speckle reduction effect. Compared to the traditional rotating diffuser, the moving diffuser 101 fully utilizes the different phase divergence angles at all positions on the diffuser 101, which can better reduce the coherence of the beam and provide a better speckle reduction effect within the same size. During the process of the first driving unit 107 and the second driving unit 108 driving the diffuser 101 to move along the first direction A and the second direction B respectively, the number of random phases also increases, improving the area utilization rate of the diffuser 101, better reducing the coherence of the beam, and improving the speckle reduction effect.

[0095] Reference Figure 1 and Figure 2As shown, the diffuser assembly also includes a second movable layer 109. The first movable layer 103 is constructed as a frame structure. The diffuser 101 is disposed on the second movable layer 109 for light beam penetration. A first elastic member 105 connects the frame structure and the second movable layer 109 and supports the second movable layer 109 in the light beam penetration direction. The second movable layer 109 and the frame structure are spaced apart in the first direction A. A second elastic member 106 supports the first movable layer 103 in the light beam penetration direction and is connected to the base 104, so that the first movable layer 103 and the base 104 are spaced apart in the light beam penetration direction. A first driving unit 107 drives the second movable layer 109 to reciprocate within the frame structure and relative to the frame structure in the first direction A. A second driving unit 108 drives the first movable layer 103 and the second movable layer 109 to reciprocate relative to the base 104 in the second direction B.

[0096] In this embodiment, firstly, the first movable layer 103 is configured as a frame structure, and the second movable layer 109, used for setting the diffuser 101, is reciprocally disposed within the frame structure along the first direction A. This greatly reduces the design requirements in the thickness direction (i.e., the beam penetration direction) of the diffuser assembly and improves the compactness of the structural design. In addition to the aforementioned functions of resetting and improving movement stability, the first elastic member 105 can also support and connect the second movable layer 109 within the frame structure, and the second elastic member 106 can also support the first movable layer 103. Supported and connected to the base 104, the first elastic element 105 and the second elastic element 106 can respectively support the second moving layer 109 and the first moving layer 103, preventing the second moving layer 109 and the first moving layer 103 from swaying in the beam penetration direction during the reciprocating movement of the second moving layer 109 relative to the first moving layer 103 along the first direction A and the reciprocating movement of the first moving layer 103 relative to the base 104 along the second direction B. This improves the stability of the reciprocating movement and eliminates the need for a separate support structure, simplifying the structural design and facilitating the lightweight and thin design of the diffuser assembly.

[0097] In one implementation, reference Figure 1 , Figure 2As shown, the frame structure of the diffuser assembly includes a first frame plate 1031, a second frame plate 1032, a third frame plate 1033, and a fourth frame plate 1034 connected sequentially end to end. The first frame plate 1031 and the third frame plate 1033 are arranged opposite each other along a first direction A, and the second frame plate 1032 and the fourth frame plate 1034 are arranged opposite each other along a second direction B. The second moving layer 109 includes two first outer surfaces 1091 arranged opposite each other along the first direction A. The two first outer surfaces 1091 are respectively spaced apart from the first frame plate 1031 and the third frame plate 1033 along the first direction A.

[0098] The first elastic element 105 includes two first springs 1051 arranged opposite each other along a first direction A and both extending along a second direction B. One of the first springs 1051 connects one of the first outer surfaces 1091 to the second frame plate 1032, and the other first spring 1051 connects the other first outer surface 1091 to the fourth frame plate 1034. The second elastic element 106 includes two second springs 1061 arranged opposite each other along the second direction B. One of the second springs 1061 connects the outer surface of the second frame plate 1032 to the base 104, and the other second spring 1061 connects the outer surface of the fourth frame plate 1034 to the base 104.

[0099] In this embodiment, firstly, the first moving layer 103 is configured as a square frame structure, which effectively improves the stability of the first moving layer 103 structure. Secondly, the first elastic element 105 is configured as two first springs 1051, and each first spring 1051 is connected to the corresponding first outer side 1091 and one of the second frame plate 1032 and the fourth frame plate 1034. When the second moving layer 109 reciprocates along the first direction A within the square frame structure, the two first springs 1051 can play a good reset role, reducing the load on the first drive part 107, and the two first springs 1051 can improve the stability of the second moving layer 109 reciprocating along the first direction A. In addition, the two first springs 1051 are respectively used to be arranged opposite to the first outer side 1091 of the second moving layer 109, which not only reduces the size arrangement of the diffuser assembly in the first direction A, but also reduces the size arrangement in the thickness direction of the diffuser assembly, which is beneficial to the thin and light design of the diffuser assembly. Similarly, the second elastic element 106 is configured as two second springs 1061, one of which connects the outer side of the second frame plate 1032 to the base 104, and the other connects the outer side of the fourth frame 1034 to the base 104. When the first moving layer 103 reciprocates relative to the base along the second direction B, the two second springs 1061 can play a good reset role, reducing the load on the second drive part 108, and the two second springs 1061 can improve the stability of the first moving layer 103 reciprocating along the second direction B. In addition, the two second springs 1061 are respectively used for the outer side of the second frame plate 1032 and the outer side of the fourth frame 1034, which not only reduces the size arrangement of the diffuser assembly in the second direction B, but also reduces the size arrangement in the thickness direction of the diffuser assembly, which is beneficial to the thinner and lighter design of the diffuser assembly.

[0100] Reference Figure 1 and Figure 4As shown, the first reed 1051 includes a first reed body 10511 and a first support piece 10512, both extending along the second direction B. The first reed body 10511 has a first elongated opening extending along the second direction B and closed at both ends. The first elongated opening includes two first inner edges 10501 arranged opposite each other along the second direction B and two second inner edges 10502 arranged opposite each other along the beam penetration direction. The first support piece 10512 is disposed in the first elongated opening, and one end of the first support piece 10512 is connected to one of the first inner edges 10501. The other end of the first support piece 10512 is spaced apart from the other first inner edge 10501 along the second direction B. The first support piece 10512 and the two second inner edges 10502 are also spaced apart along the beam penetration direction. The first reed body 10511 is used to connect with the second frame plate 1032 or the fourth frame plate 1034, and the first support piece 1051 is used to connect with the first outer surface 1091.

[0101] And / or, the second reed 1061 includes a second reed body 10611 extending along the first direction A and a second support piece 10612. The second reed body 10611 has a second elongated opening extending along the first direction A and closed at both ends. The second elongated opening includes two third inner edges 10601 arranged opposite each other along the first direction A and two fourth inner edges 10602 arranged opposite each other along the beam penetration direction. The second support piece 10612 is disposed in the second elongated opening and one end of the second support piece 10612 is connected to one of the third inner edges 10601. The other end of the second support piece 10612 is spaced apart from the other third inner edge 10601 along the first direction A, and the second support piece 10612 and the two fourth inner edges 10602 are spaced apart along the beam penetration direction. The second reed body 10611 is used to connect with the base 104, and the second support piece 10612 is used to connect with the outer side of the second frame plate 1032 or the outer side of the fourth frame plate 1034.

[0102] In this embodiment, the first reed 1051 includes two parts: the first reed body 10511 and the first support piece 10512. First, the first support piece 10512 extends along the second direction B and is elongated, thus possessing good rigidity in the beam penetration direction. By connecting the first support piece 10512 to the first outer surface 1091 in a relatively close manner, it can provide good support for the second moving layer 109 in the beam penetration direction, preventing the second moving layer 109 from shaking in the beam penetration direction. Second, the first spring body 10511, in addition to connecting the first moving layer 103, also has an important function of being able to elastically deform along the first direction A. Specifically, during the reciprocating movement of the second moving layer 109 along the first direction A, the two first deformation arms 10514 of the first spring body 10511 adjacent to the first support piece 10512 can deform along the first direction A, playing a role in resetting and improving the stability of the reciprocating movement of the second moving layer 109.

[0103] And / or, the second reed 1061 also includes two parts: a second reed body 10611 and a second support piece 10612. Firstly, the second support piece 10612 extends along the first direction A and is elongated, thus possessing good rigidity in the beam penetration direction. By connecting the second support piece 10612 relatively close to the outer side of the second frame plate 1032 or the outer side of the fourth frame plate 1034, it can provide good support for the first moving layer 103 in the beam penetration direction, stably supporting the first moving layer 103 on the base 104 and preventing the first moving layer 103 from being damaged in the beam penetration direction. Shaking occurs; secondly, for the second spring body 10611, in addition to connecting the first moving layer 103 and the base 104, it also has an important function of being able to elastically deform along the second direction B. Specifically, during the reciprocating movement of the first moving layer 103 along the first direction B, the two second deformation arms 10613 of the second spring body 10611 adjacent to the second support piece 10612 can deform along the second direction B, which plays a role in resetting and improving the stability of the reciprocating movement of the first moving layer 103.

[0104] Another point to note is that the first support piece 10512 and the two second inner edges 10502 are spaced apart along the beam penetration direction. Therefore, during the reciprocating movement of the second moving layer 109 along the first direction A, the first support piece 10512 will not structurally interfere with the two first deformable arms 10514, ensuring that the first deformable arms 10514 can deform normally. Similarly, the second support piece 10612 and the two fourth inner edges 10602 are spaced apart along the beam penetration direction. Therefore, during the reciprocating movement of the first moving layer 103 along the second direction B, the second support piece 10612 will not structurally interfere with the two second deformable arms 10613, ensuring that the second deformable arms 10613 can deform normally.

[0105] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, two first slots 10510 are formed at both ends of the first reed body 10511. The first outer surface 1091 includes a first part and a second part. The first part is attached to and connected with the first support piece 10512. A first locking block 10513 is provided on the second part. A second locking block 1030 is provided on the inner side of the second frame plate 1032 or the inner side of the fourth frame plate 1034. The two first slots 10510 respectively engage with the first locking block 10513 and the second locking block 1030. The second spring body 10611 has two second slots 10610 formed at both ends. The outer side of the second frame plate 1032 or the outer side of the fourth frame plate 1034 both include a third part and a fourth part. The third part is fitted and connected to the second support piece 10612. The fourth part is provided with a third locking block 1035, and the base 104 is provided with a fourth locking block 1040. The two second slots 10610 are respectively engaged with the third locking block 1035 and the fourth locking block 1040. By setting the above-mentioned mutually cooperating locking block and slot structure, a good positioning function is achieved, facilitating the installation of the spring.

[0106] Reference Figure 1 and Figure 2 As shown, the base 104 includes a base frame 1041 and a base plate 1042, with the base plate 1042 sealing inside the base frame 1041; a first opening 1092 is formed on the second moving layer 109, and a diffuser 101 is sealed in the first opening 1092; a second opening 10420 is formed on the base plate 1042, and the second opening 10420 is positioned opposite to the first opening 1092 along the beam penetration direction.

[0107] In this embodiment, the base 104 is configured as two parts: a base frame 1041 and a base plate 1042, with the base plate 1042 enclosed within the base frame 1041. This effectively improves the stability of the base 104 structure and provides good support for the diffuser assembly. Secondly, a first opening 1092 for mounting the diffuser 101 is formed on the second moving layer 109, which reduces the weight of the second moving layer 109 and facilitates the design of a thinner diffuser assembly. Furthermore, a second opening 10420 opposite to the first opening 1092 is opened on the base plate 1042, allowing the light beam to pass through the diffuser assembly and avoiding obstruction of the light beam.

[0108] Specifically, refer to Figure 1 As shown, the base frame 1041 includes a base frame body 10411 and a base frame side plate 10412 connected to each other. The first movable layer 103 and the base frame body 10411 are spaced apart in the beam penetration direction. The base bottom plate 1042 is sealed inside the base frame body 10411. The base frame side plate 10412 extends along the second direction B and protrudes from the base frame body 10411 in the beam penetration direction. A fourth locking block 1040 is provided at the end of the base frame side plate 10412 along the second direction B to engage with the corresponding second locking groove 10610 on the corresponding second spring body 10611. That is, by setting the base frame 1041 to this L-shaped structure, in addition to connecting the first movable layer 103 and facilitating the connection of the second spring 1061, the design that the first movable layer 103 is approximately flat with the base frame side plate 10412 can also utilize the thin design of the diffuser assembly.

[0109] Reference Figure 1 and Figure 5 As shown, the first driving unit 107 includes a first driving magnet 1071 and a first current-carrying conductor 1072 disposed opposite to each other, one of the first driving magnet 1071 and the first current-carrying conductor 1072 being disposed on the second moving layer 109, and the other being disposed on the base 104; and / or, the second driving unit 108 includes a second driving magnet 1081 and a second current-carrying conductor 1082 disposed opposite to each other, one of the second driving magnet 1081 and the second current-carrying conductor 1082 being disposed on the first moving layer 103, and the other being disposed on the base 104.

[0110] For example, a first driving magnet 1071 is disposed on a second moving layer 109, and the N pole and S pole of the first driving magnet 1071 are arranged along the beam penetration direction. A first energized conductor 1072 is disposed on a base 104 and is disposed opposite to the first driving magnet 1071. The first straight segment 10720 of the first energized conductor 1072 extends along a second direction B. And / or, the second driving part 108 includes a second driving magnet 1081 and a second energized conductor 1082. The second driving magnet 1081 is disposed on a first moving layer 103, and the N pole and S pole of the second driving magnet 1081 are arranged along the beam penetration direction. The second energized conductor 1082 is disposed on a base 104 and is disposed opposite to the second driving magnet 1081. The second straight segment 10820 of the second energized conductor 1082 extends along a first direction A.

[0111] In this embodiment, it is known that the first straight segment 10720 of the first current-carrying conductor 1072 extending along the second direction B is located within the magnetic field generated by the first driving magnet 1071, whose N and S poles are arranged along the beam penetration direction. According to the left-hand rule, the first straight segment 10720 is subjected to an Ampere force along the first direction A, while the first driving magnet 1071 is subjected to a reaction force opposite to that of the first straight segment 10720. Since the first driving magnet 1071 is disposed on the second moving layer 109, the second moving layer 109 can reciprocate along the first direction A. Similarly, it can be deduced using the left-hand rule that the second driving part 108, constructed with the second driving magnet 1081 and the second current-carrying conductor 1082, can drive the first moving layer 103 to reciprocate along the second direction B.

[0112] By configuring the first drive unit 107 and the second drive unit 108 as a drive magnet and an energized conductor, in addition to driving stability, the noise level can be reduced as much as possible, thereby improving the user experience of the diffuser assembly in specific product applications.

[0113] Optionally, refer to Figure 1 and Figure 2 As shown, the base 104 includes a base frame 1041 and a base plate 1042, with the base plate 1042 sealing inside the base frame 1041; a first opening 1092 is formed on the second moving layer 109, and a diffuser 101 is sealed in the first opening 1092; a second opening 10420 is formed on the base plate 1042, and the second opening 10420 is opposite to the first opening 1092 along the beam penetration direction; a first current-carrying conductor 1072 and a second current-carrying conductor 1082 are both disposed on the inner surface of the base plate 1042; a first mounting groove 1070 for mounting the first driving magnet 1071 is formed on the second moving layer 109, and a second mounting groove 1080 for mounting the second driving magnet 1081 is formed on the first moving layer 103.

[0114] In this embodiment, by setting both the first current-carrying conductor 1072 and the second current-carrying conductor 1082 on the inner surface of the base plate 1042, in addition to effectively utilizing the arrangement space and improving the compactness of the structural arrangement, it is also possible to reduce the size of the arrangement in the beam penetration direction, which facilitates the design of a thinner diffuser assembly. The second moving layer 109 and the first moving layer 103 are respectively formed with a first mounting groove 1070 and a second mounting groove 1080 for mounting the first driving magnet 1071 and the second driving magnet 1081, which improves the installation convenience of the first driving magnet 1071 and the second driving magnet 1081 while utilizing the lightweight design of the diffuser assembly.

[0115] Reference Figure 1 As shown, the diffuser assembly also includes a flexible circuit board 1043 laid on the inner surface of the base plate 1042. The first energized conductor 1072 and the second energized conductor 1082 are both connected to the flexible circuit board 1043. In this embodiment, the energized conductors can be formed by winding existing electrical connection wires on the flexible circuit board 1043, without occupying the height of the diffuser assembly in the thickness direction. The energized conductors are directly arranged on the flexible circuit board 1043, becoming part of the flexible circuit board 1043. This also eliminates the need for traditional coil assembly processes such as winding, soldering, and adhesive fixing, improving operational convenience.

[0116] In other implementations, refer to Figure 1 , Figure 2 as well as Figure 5 As shown, the diffuser assembly also includes a controller, a first detection element 110, and a second detection element. The first detection element 110 is used to detect first motion information of the second moving layer 109, and the second detection element is used to detect second motion information of the first moving layer 103. The first detection element 110, the first detection element, the first energized conductor 1072, and the second energized conductor 1082 are all electrically connected to the controller. The controller is used to control the first energized conductor 1072 to work according to the first motion information detected by the first detection element 110, and to control the second energized conductor 1082 to work according to the second motion information detected by the first detection element.

[0117] In this embodiment, by providing a first detection element 110 for detecting the first motion information of the second moving layer 109 and a first detection element for detecting the second motion information of the first moving layer 103, the motion states of the second moving layer 109 and the first moving layer 103 can be monitored in real time, that is, the motion states of the diffuser 101 in the first direction A and the second direction B can be monitored. Furthermore, by providing a controller electrically connected to the detection elements and the energized conductor, when the detection elements detect an abnormality in the motion state of the first moving layer 103 and / or the second moving layer 109 and require adjustment... When adjusting the motion state of the first moving layer 103 and / or the second moving layer 109, the controller adjusts the magnitude and direction of the current in the second energized conductor 1082 corresponding to the first moving layer 103, and / or adjusts the magnitude and direction of the current in the first energized conductor 1072 corresponding to the second moving layer 6, thereby adjusting the magnitude and direction of the force on the first moving layer 103 and / or the second moving layer 109, and thus adjusting the motion state of the first moving layer 103 and the second moving layer 109, that is, realizing the adjustment of the motion state of the diffuser 101 in the first direction A and the second direction B.

[0118] Optionally, both the first detection element 110 and the first detection element described above can be configured as tunnel magnetoresistive sensors (TMR). The current-carrying conductor is configured as a ring-shaped copper coil. The tunnel magnetoresistive sensor is disposed inside the ring-shaped copper coil to detect the strength of the magnetic field and feed it back to the controller. The controller can determine the movement status of the first moving layer 103 and the second moving layer 109 based on the changes in the strength of the magnetic field and perform control accordingly. However, this disclosure does not limit the specific type of the first detection element 110 and the first detection element.

[0119] Optionally, refer to Figure 1 and Figure 5As shown, the first driving magnet 1071 includes a first individual magnet 10711 and a second individual magnet 10712 arranged sequentially along a first direction A. The N poles and S poles of the first individual magnet 10711 and the second individual magnet 10712 are arranged along the direction of the light beam penetration, and the magnetic pole directions of the first individual magnet 10711 and the second individual magnet 10712 are opposite. The first current-carrying conductor 1072 is constructed as a first current-carrying coil. The first current-carrying coil includes two first straight segments 10720 extending along a second direction B and spaced apart along the first direction A, with opposite current directions. The two first straight segments 10720 are respectively used to be positioned opposite to the first individual magnet 10711 and the second individual magnet 10712. The second driving magnet 1081 includes a third individual magnet 10811 and a fourth individual magnet 10812 arranged sequentially along the second direction B. The N pole and S pole of the third individual magnet 10811 and the fourth individual magnet 10812 are arranged along the direction of the light beam penetration, and the magnetic pole directions of the third individual magnet 10811 and the fourth individual magnet 10812 are opposite. The second current-carrying conductor 1082 is constructed as a second current-carrying coil. The second current-carrying coil includes two second straight segments 10820 extending along the first direction A and spaced apart along the second direction B with opposite current directions. The two second straight segments 10820 are respectively arranged opposite to the third individual magnet 10811 and the fourth individual magnet 10812.

[0120] In this embodiment, under the action of the first single magnet 10711 and the second single magnet 10712, both first straight segments 10720 of the first energized coil are subjected to Ampere force, and the direction of the Ampere force on the two first straight segments 10720 is along the first direction A and in the same direction. Correspondingly, the first single magnet 10711 and the second single magnet 10712 are subjected to Ampere force along the first direction A and in the same direction. Since the first driving magnet 107 is disposed on the second moving layer 109, the second moving layer 109 is subjected to Ampere force along the first direction A. The second moving layer 109 drives the diffuser plate 101 on it to move back and forth along the first direction A.

[0121] Similarly, under the action of the third individual magnet 10811 and the fourth individual magnet 10812, the two second straight segments 10820 of the second energized coil are subjected to Ampere force, and the direction of the Ampere force on the two second straight segments 10820 is along the second direction B and in the same direction. Correspondingly, the third individual magnet 10811 and the fourth individual magnet 10812 are subjected to Ampere force along the second direction B and in the same direction. Since the second driving magnet 108 is disposed on the first moving layer 103, the first moving layer 103 is subjected to Ampere force along the first direction B. The first moving layer 103 drives the second moving layer 109 and the diffuser plate 101 to reciprocate along the second direction A.

[0122] The first energizing coil can fully utilize the magnetic fields generated on both sides of the thickness direction by the first single magnet 10711 and the second single magnet 10712. The design of the first driving magnet 1071, which uses two single magnets with opposite polarities, can achieve extremely high magnetic field utilization. The first energizing coil can adopt a racetrack-shaped design. The dimensions of the first single magnet 10711 and the second single magnet 10712 in the second direction B can be equal to the length of the first straight segment 10720 mentioned above, so as to compress the ineffective arc segment of the first energizing coil to the shortest possible length and improve the utilization rate of the first energizing coil. Furthermore, the design of the first driving magnet 1071 and the first energizing coil can also be compressed as much as possible in the thickness direction of the diffuser assembly, which is conducive to the thinner and lighter design of the diffuser assembly.

[0123] Similarly, the second energizing coil can fully utilize the magnetic fields generated by the third single magnet 10811 and the fourth single magnet 10812 on both sides of the thickness direction. The design of the second driving magnet 1081, which uses two single magnets with opposite polarities, can achieve extremely high magnetic field utilization. The second energizing coil can adopt a racetrack-shaped design. The dimensions of the third single magnet 10811 and the fourth single magnet 10812 in the first direction A can be equal to the length of the second straight segment 10820 mentioned above, so as to compress the ineffective arc segment of the second energizing coil to the shortest possible length and improve the utilization rate of the second energizing coil. Furthermore, the design of the first driving magnet 1081 and the second energizing coil can also be compressed as much as possible in the thickness direction of the diffuser assembly, which is conducive to the thinner and lighter design of the diffuser assembly.

[0124] Reference Figure 1 and Figure 5 As shown, the first driving magnet 1071 further includes a first neutral layer 10713 disposed between the first single magnet 10711 and the second single magnet 10712, and the second driving magnet 1081 further includes a second neutral layer 10813 disposed between the third single magnet 10811 and the fourth single magnet 10812.

[0125] The first neutral layer 10713 is configured such that, during the reciprocating movement of the first driving magnet 1071 relative to the first energized coil along the first direction A, the first neutral layer 10713 ensures that the first straight line segment 10720 opposite to the first single magnet 10711 will not be opposite to the second single magnet 10712, and also ensures that the first straight line segment 10720 opposite to the second single magnet 10712 will not be opposite to the first single magnet 10711; the second neutral layer 10813 is configured such that, during the reciprocating movement of the second driving magnet 1081 relative to the second energized coil along the second direction B, the second neutral layer 10813 ensures that the second straight line segment 10820 opposite to the third single magnet 10811 will not be opposite to the fourth single magnet 10812, and also ensures that the second straight line segment 10820 opposite to the fourth single magnet 10812 will not be opposite to the third single magnet 10811.

[0126] By providing a first neutral layer 10713 between the first individual magnet 10711 and the second individual magnet 10712, during the reciprocating movement of the first driving magnet 1071 relative to the first energized coil along the first direction A, the first neutral layer 10713 ensures that the first straight line segment 10720 opposite to the first individual magnet 10711 will not be opposite to the second individual magnet 10712, and also ensures that the first straight line segment 10720 opposite to the second individual magnet 10712 will not be opposite to the first individual magnet 10711, thus avoiding the generation of resistance opposite to the moving direction of the second moving layer 109 and improving the smoothness of the reciprocating movement of the second moving layer 109 in the first direction A.

[0127] Similarly, by providing a second neutral layer 10813 between the third individual magnet 10811 and the fourth individual magnet 10812, during the reciprocating movement of the second driving magnet 1071 relative to the second energized coil along the second direction B, the second neutral layer 10813 ensures that the second straight segment 10820 opposite to the third individual magnet 10811 will not be opposite to the fourth individual magnet 10812, and also ensures that the second straight segment 10820 opposite to the fourth individual magnet 10812 will not be opposite to the third individual magnet 10811, thus avoiding the generation of resistance opposite to the moving direction of the first moving layer 103 and improving the smoothness of the reciprocating movement of the first moving layer 103 in the second direction B.

[0128] Reference Figure 6As shown, the diffuser assembly also includes a second moving layer 109, a first guide support 111, and a second guide support 112. The first moving layer 103 is constructed as a frame structure. The diffuser 101 is disposed on the second moving layer 109. The first guide support 111 is disposed on the frame structure and supports the second moving layer 109 within the frame structure along the beam penetration direction. The first elastic member 105 connects the second moving layer 109 and the first moving layer 103, and the second moving layer 109 and the frame structure are spaced apart in the first direction A. The second guide support 112 is disposed on the base 104 and supports the first moving layer 103 on the base 104 along the beam penetration direction. The second elastic member 106 connects the base 104 and the first moving layer 103.

[0129] In this embodiment, the first guide support 111 can effectively support the second moving layer 109 within the frame structure and ensure that the second moving layer 109 can reciprocate along the first direction A; the second guide support 112 can effectively support the first moving layer 103 on the base 104 and ensure that the first moving layer 103 can reciprocate relative to the base 104 along the second direction B.

[0130] Reference Figure 6 As shown, the first guide support 111 includes two first guide support pillars 1110 spaced apart on the first movable layer 103 along the beam penetration direction. The two first guide support pillars 1110 can extend along the second direction B, and the second movable layer 109 is movably disposed between the two first guide support pillars 1110 along the first direction A; and / or, the second guide support 112 includes two second guide support pillars 1120 spaced apart on the base 104 along the beam penetration direction. The two second guide support pillars 1120 can extend along the first direction A, and the first movable layer 103 is movably disposed between the two second guide support pillars 1120 along the second direction B. The first guide support pillars 1110 and 1120 have simple structures and can play a good guiding and supporting role, and facilitate the lightweight design of the diffuser assembly. However, this disclosure does not limit the specific structural form of the first guide support 111 and the second guide support 112.

[0131] Based on the provision of the first guide support 111 and the second guide support 112, the structures of the first spring 1051 and the second spring 1061 will also change accordingly. That is, the first guide support 111 replaces the first support piece 10512, and the second guide support 112 replaces the second support piece 10612. The structures of other parts are similar to the first spring 1051 and the second spring 1061 described above, as shown in Figure 6.

[0132] This disclosure also provides a beam spot elimination device, with reference to... Figure 7 As shown, the beam scattering device includes a beam emitter 300, a beam shrinking assembly 400, a beam homogenizing assembly 500, and a scattering element 600 disposed between the beam shrinking assembly 400 and the beam homogenizing assembly 500. The scattering element 600 includes the aforementioned diffuser assembly.

[0133] Optionally, the beam-shrinking assembly 400 can be a Galilean telescope with a meniscus positive objective lens and a biconcave negative secondary lens, and the beam-shielding assembly 500 can be a compound eye lens or a beam-shielding rod.

[0134] In addition, such as Figure 7 As shown, a collimator 700 can also be provided between the scattering element 600 and the beam homogenizing component 500. The collimator 700 can be a single or a group of condensing lenses. This beam spot-reducing device can utilize the different phase divergence angles at all positions on the diffuser 101 to provide a better spot-reducing effect within the same size.

[0135] This disclosure also provides a projector that includes the above-described beam speckle reduction device, which has all the beneficial effects of the diffuser assembly and the beam speckle reduction device, which will not be described in detail here.

[0136] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0137] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0138] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A diffuser assembly, characterized in that, The diffuser assembly is used to be disposed in the beam scattering device of the projector. The diffuser assembly includes a first movable layer (103), a base (104), a first elastic element (105), a second elastic element (106), a second movable layer (109), and a diffuser (101) for the beam to pass through. The diffuser (101) is disposed on the second movable layer (109). The driving part includes a first driving part (107) and a second driving part (108). The first elastic member (105) connects the first movable layer (103) and the second movable layer (109), and the first elastic member (105) can support the second movable layer (109) in the beam penetration direction. The first movable layer (103) is constructed as a frame structure and sleeves the second movable layer (109), and the two are spaced apart in the first direction (A). The first elastic element (105) is configured to deform along a first direction (A) parallel to the diffuser (101) so that the second movable layer (109) can move relative to the first movable layer (103) along the first direction (A); The second elastic element (106) connects the first movable layer (103) and the base (104), and the second elastic element (106) can support the first movable layer (103) in the beam penetration direction; The second elastic member (106) is configured to deform along a second direction (B) parallel to the diffuser (101) so that the first movable layer (103) and the diffuser (101) can move relative to the base (104) along the second direction (B); The first driving unit (107) is used to drive the second moving layer (109) to move relative to the first moving layer (103) in the first direction (A) within the first moving layer (103); the second driving unit (108) is used to drive the first moving layer (103) and the second moving layer (109) to move relative to the base (104) along the second direction (B); wherein the first direction (A) and the second direction (B) intersect; The frame structure includes a first frame plate (1031), a second frame plate (1032), a third frame plate (1033), and a fourth frame plate (1034) connected sequentially end to end. The first frame plate (1031) and the third frame plate (1033) are arranged opposite each other along the first direction (A), and the second frame plate (1032) and the fourth frame plate (1034) are arranged opposite each other along the second direction (B).

2. The diffuser assembly according to claim 1, characterized in that, The first movable layer (103) and the base (104) are spaced apart in the beam penetration direction; The first driving unit (107) is used to drive the second moving layer (109) to reciprocate within the frame structure and relative to the frame structure in the first direction (A), and the second driving unit (108) is used to drive the first moving layer (103) and the second moving layer (109) to reciprocate relative to the base (104) in the second direction (B).

3. The diffuser assembly according to claim 2, characterized in that, The second movable layer (109) includes two first outer surfaces (1091) arranged opposite to each other along the first direction (A), and the two first outer surfaces (1091) are respectively spaced apart from the first frame plate (1031) and the third frame plate (1033) along the first direction (A).

4. The diffuser assembly according to claim 3, characterized in that, The first elastic element (105) includes two first springs (1051), one of which is disposed between the first outer side surface (1091) and the first frame plate (1031), and the other of which is disposed between the other first outer side surface (1091) and the third frame plate (1033); and / or, The second elastic element (106) includes two second springs (1061), one of which is opposite to the outer side of the second frame plate (1032), and the other is opposite to the outer side of the fourth frame plate (1034).

5. The diffuser assembly according to claim 4, characterized in that, The first reed (1051) includes a first reed body (10511) extending along the second direction (B), one end of the first reed body (10511) being connected to the first movable layer (103) and the other end being connected to the second movable layer (109), and the first reed body (10511) being deformable along the first direction (A); and / or, The second reed (1061) includes a second reed body (10611) extending along the first direction (A), one end of the second reed body (10611) being connected to the first movable layer (103) and the other end being connected to the base (104), and the second reed body (10611) being deformable along the second direction (B).

6. The diffuser assembly according to claim 5, characterized in that, The first reed (1051) further includes a first support piece (10512) connected to the first reed body (10511), the first support piece (10512) being connected to the first outer surface (1091); and / or, The second reed (1061) also includes a second support piece (10612) connected to the second reed body (10611), and the second support piece (10612) is connected to the outer side of the second frame plate (1032) or the outer side of the fourth frame plate (1034).

7. The diffuser assembly according to claim 6, characterized in that, The first reed body (10511) has a first elongated opening extending along the second direction (B) and closed at both ends. The first elongated opening includes two first inner edges (10501) arranged opposite to each other along the second direction (B). The first support piece (10512) is disposed within the first elongated opening, and one end of the first support piece (10512) is connected to one of the first inner edges (10501). The other end of the first support piece (10512) is spaced apart from the other first inner edge (10501) along the second direction (B); and / or, The second reed body (10611) has a second elongated opening that extends along the first direction (A) and is closed at both ends. The second elongated opening includes two third inner edges (10601) that are arranged opposite to each other along the first direction (A). The second support piece (10612) is disposed in the second elongated opening and one end of the second support piece (10612) is connected to one of the third inner edges (10601). The other end of the second support piece (10612) is spaced apart from the other third inner edge (10601) along the first direction (A).

8. The diffuser assembly according to claim 7, characterized in that, The first elongated opening further includes two second inner edges (10502) arranged opposite each other along the beam penetration direction, and the first support piece (10512) and the two second inner edges (10502) are all spaced apart along the beam penetration direction; and / or, The second elongated opening also includes two fourth inner edges (10602) arranged opposite each other along the beam penetration direction, and the second support piece (10612) and the two fourth inner edges (10602) are all spaced apart along the beam penetration direction.

9. The diffuser assembly according to claim 7, characterized in that, The first reed body (10511) has a first slot (10510) formed at each end. The second moving layer (109) is provided with a first locking block (10513), and the first moving layer (103) is provided with a second locking block (1030). The two first slots (10510) are respectively engaged with the first locking block (10513) and the second locking block (1030); and / or, The second reed body (10611) has a second slot (10610) formed at both ends, the first moving layer (103) is provided with a third block (1035), and the base (104) is provided with a fourth block (1040). The two second slots (10610) are respectively engaged with the third block (1035) and the fourth block (1040).

10. The diffuser assembly according to claim 9, characterized in that, The first outer surface (1091) includes a first part and a second part. The first part is attached and connected to the first support piece (10512). A first locking block (10513) is provided on the second part. A second locking block (1030) is provided on the inner side of the second frame plate (1032) or the inner side of the fourth frame plate (1034); and / or, The outer side of the second frame plate (1032) or the outer side of the fourth frame plate (1034) includes a third part and a fourth part. The third part is in relative contact with the second support piece (10612), and the fourth part is provided with a third locking block (1035).

11. The diffuser assembly according to claim 1, characterized in that, The base (104) includes a base frame (1041) and a base plate (1042) connected to each other; a first opening (1092) is formed on the second moving layer (109), the diffuser (101) is sealed in the first opening (1092), a second opening (10420) is formed on the base plate (1042), and the second opening (10420) is disposed opposite to the first opening (1092) along the beam penetration direction.

12. The diffuser assembly according to claim 11, characterized in that, The base frame (1041) includes a base frame body (10411) and a base frame side plate (10412) connected to each other. The first movable layer (103) and the base frame body (10411) are spaced apart in the beam penetration direction. The base bottom plate (1042) is sealed inside the base frame body (10411). The base frame side plate (10412) extends along the second direction (B) and protrudes from the base frame body (10411) in the beam penetration direction. A fourth locking block (1040) is provided at the end of the base frame side plate (10412) along the second direction (B) to engage with the corresponding second locking groove (10610) on the corresponding second spring body (10611).

13. The diffuser assembly according to claim 1, characterized in that, The first driving unit (107) includes a first driving magnet (1071) and a first current-carrying conductor (1072) disposed opposite to each other, wherein one of the first driving magnet (1071) and the first current-carrying conductor (1072) is disposed on the second moving layer (109), and the other is disposed on the base (104); and / or, The second driving unit (108) includes a second driving magnet (1081) and a second current-carrying conductor (1082) disposed opposite to each other. One of the second driving magnet (1081) and the second current-carrying conductor (1082) is disposed on the first moving layer (103), and the other is disposed on the base (104).

14. The diffuser assembly according to claim 13, characterized in that, The base (104) includes a base frame (1041) and a base plate (1042). The first current-carrying conductor (1072) and the second current-carrying conductor (1082) are both disposed on the inner surface of the base plate (1042). A first mounting groove (1070) for mounting the first driving magnet (1071) is formed on the second moving layer (109), and a second mounting groove (1080) for mounting the second driving magnet (1081) is formed on the first moving layer (103).

15. The diffuser assembly according to claim 14, characterized in that, The diffuser assembly also includes a flexible circuit board (1043) laid on the inner surface of the base plate (1042), and the first current-carrying conductor (1072) and the second current-carrying conductor (1082) are both connected to the flexible circuit board (1043).

16. The diffuser assembly according to claim 14, characterized in that, The diffuser assembly further includes a controller, a first detection element, and a second detection element. The first detection element is used to detect first motion information of the second moving layer (109), and the second detection element is used to detect second motion information of the first moving layer (103). The first detection element, the second detection element, the first energized conductor (1072), and the second energized conductor (1082) are all electrically connected to the controller. The controller is used to control the first energized conductor (1072) to work according to the first motion information detected by the first detection element, and to control the second energized conductor (1082) to work according to the second motion information detected by the second detection element.

17. The diffuser assembly according to claim 13, characterized in that, The first driving magnet (1071) includes a first individual magnet (10711) and a second individual magnet (10712) arranged sequentially along the first direction (A). The N pole and S pole of the first individual magnet (10711) and the second individual magnet (10712) are arranged along the beam penetration direction, and the magnetic pole directions of the first individual magnet (10711) and the second individual magnet (10712) are opposite. The first current-carrying conductor (1072) is constructed as a first current-carrying coil. The first current-carrying coil includes two first straight segments (10720) that extend along the second direction (B) and are spaced apart along the first direction (A) and have opposite current directions. The two first straight segments (10720) are respectively arranged opposite to the first single magnet (10711) and the second single magnet (10712). And / or, the second driving magnet (1081) includes a third individual magnet (10811) and a fourth individual magnet (10812) arranged sequentially along the second direction (B), wherein the N pole and S pole of the third individual magnet (10811) and the fourth individual magnet (10812) are arranged along the beam penetration direction, and the magnetic pole directions of the third individual magnet (10811) and the fourth individual magnet (10812) are opposite; The second energized conductor (1082) is constructed as a second energized coil, which includes two second straight segments (10820) extending along the first direction (A) and spaced apart along the second direction (B) with opposite current directions. The two second straight segments (10820) are respectively arranged opposite to the third single magnet (10811) and the fourth single magnet (10812).

18. The diffuser assembly according to claim 17, characterized in that, The first driving magnet (1071) further includes a first neutral layer (10713) disposed between the first single magnet (10711) and the second single magnet (10712). The first neutral layer (10713) is configured such that during the reciprocating movement of the first driving magnet (1071) relative to the first energized coil along the first direction (A), the first neutral layer (10713) can ensure that the first straight line segment (10720) opposite to the first single magnet (10711) will not be opposite to the second single magnet (10712), and can also ensure that the first straight line segment (10720) opposite to the second single magnet (10712) will not be opposite to the first single magnet (10711). And / or, the second driving magnet (1081) further includes a second neutral layer (10813) disposed between the third single magnet (10811) and the fourth single magnet (10812); the second neutral layer (10813) is configured such that, during the reciprocating movement of the second driving magnet (1081) relative to the second energized coil along the second direction (B), the second neutral layer (10813) enables the second straight segment (10820) opposite to the third single magnet (10811) to not be opposite to the fourth single magnet (10812), and enables the second straight segment (10820) opposite to the fourth single magnet (10812) to not be opposite to the third single magnet (10811).

19. The diffuser assembly according to claim 1, characterized in that, The diffuser assembly further includes a first guide support (111), which is disposed on the first movable layer (103) and supports the second movable layer (109) within the first movable layer (103) along the beam penetration direction.

20. The diffuser assembly according to claim 19, characterized in that, The first guide support (111) includes two first guide support columns (1110) spaced apart on the first moving layer (103) along the beam penetration direction, and the second moving layer (109) is movably disposed between the two first guide support columns (1110) along the first direction (A).

21. The diffuser assembly according to claim 1, characterized in that, The diffuser assembly further includes a second guide support (112), which is disposed on the base (104) and supports the first movable layer (103) on the base (104) along the beam penetration direction. The second elastic member (106) connects the base (104) and the first movable layer (103).

22. The diffuser assembly according to claim 21, characterized in that, The second guide support (112) includes two second guide support columns (1120) spaced apart on the base (104) along the beam penetration direction, and the first movable layer (103) is movably disposed between the two second guide support columns (1120) along the second direction (B).

23. A beam spot-reducing device, comprising a beam emitter (300), a beam-shrinking assembly (400), a beam-homogenizing assembly (500), and a scattering element (600) disposed between the beam-shrinking assembly (400) and the beam-homogenizing assembly (500), characterized in that, The scattering element (600) includes a diffuser assembly according to any one of claims 1-22.

24. A projector, characterized in that, The projector includes the beam spot-reducing device according to claim 23.

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