CN113917698A

CN113917698A - Diffusion sheet assembly, light source device, and projector

Info

Publication number: CN113917698A
Application number: CN202111229617.7A
Authority: CN
Inventors: 杜世杰; 欧阳剑; 张聪; 胡震宇
Original assignee: Shenzhen Huole Science and Technology Development Co Ltd
Current assignee: Shenzhen Huole Science and Technology Development Co Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-01-11

Abstract

The present disclosure relates to a diffusion sheet assembly, a light source device and a projector, the diffusion sheet assembly includes a base, a first diffusion sheet for light beam to penetrate through, a first moving layer, a first memory metal and a second memory metal; the first diffusion sheet is connected with the first moving layer through a first memory metal, and the first memory metal can deform along a first direction so that the first diffusion sheet can move relative to the first moving layer in the first direction; the first moving layer is connected with the base through a second memory metal, and the second memory metal can deform along the second direction, so that the first moving layer and the first diffusion sheet can move in the second direction relative to the base, and the first direction is intersected with the second direction. The diffusion sheet assembly can increase the random phase number of the diffusion sheet in unit time and improve the speckle dispersing effect.

Description

Diffusion sheet assembly, light source device, and projector

Technical Field

The present disclosure relates to the field of projection display technologies, and in particular, to a diffusion sheet assembly, a light source device, and a projector.

Background

The light beam projection display technology can reproduce rich and gorgeous colors of an objective world most truly and provide shocking expressive force, wherein speckle elimination is a relatively popular research subject in the light beam projection technology, and the principle of the speckle elimination is mainly to reduce the coherence of light beams in space and time.

The existing structure for eliminating the light beam speckles mostly adopts a rotary type diffusion wheel form, the principle is the superposition of a plurality of independent speckle patterns in unit time, and under the condition of certain rotating speed, the random phase quantity of a diffusion sheet in unit time is increased, so that a better speckle eliminating effect can be obtained. The diffuser near the beam source is used to eliminate smaller spots and requires a smaller diffuser size, but for a rotating type diffuser wheel, the smaller diffuser provides less random phase and poor speckle elimination. In addition, the size of the diffusion wheel needs to be increased, a rotating wheel with a larger size needs to be matched, the practical application area is limited, the maximization of the diffusion sheet application area cannot be realized, and the speckle dispersing effect is poor.

Disclosure of Invention

An object of the present disclosure is to provide a diffuser assembly capable of increasing the number of random phases of a diffuser in a unit time and improving a speckle-dispersing effect, a light source device, and a projector.

In order to achieve the above object, the present disclosure provides a diffusion sheet assembly, which includes a base, a first diffusion sheet for light beams to pass through, a first moving layer, a first memory metal, and a second memory metal;

the first diffusion sheet is connected with the first moving layer through the first memory metal, and the first memory metal can deform along a first direction so that the first diffusion sheet can move relative to the first moving layer in the first direction;

the first moving layer is connected with the base through the second memory metal, and the second memory metal can be deformed along a second direction, so that the first moving layer and the first diffusion sheet can move in the second direction relative to the base, and the first direction and the second direction are crossed.

Optionally, the diffuser assembly further comprises a second moving layer, the first diffuser is mounted to the second moving layer, and the first memory metal connects the second moving layer and the first moving layer;

the diffusion sheet assembly further comprises a first elastic member, the first elastic member is connected with the first moving layer and the second moving layer and supports the second moving layer in a light beam penetrating direction, and the first elastic member can deform along the first direction,

and/or the diffuser assembly further comprises a second elastic member, the second elastic member is connected with the first moving layer and the base and supports the first moving layer in the light beam penetrating direction, and the second elastic member can deform along the second direction; preferably, the first moving layer is configured as a first frame structure, the second moving layer is configured as a second frame structure, the first diffusion sheet is disposed in the second frame structure, and the first frame structure is disposed at the periphery of the second frame structure in a spaced manner.

Optionally, the first frame structure includes a first frame plate, a second frame plate, a third frame plate, and a fourth frame plate that are sequentially and end-to-end connected, where the first frame plate and the third frame plate are disposed oppositely along the first direction, and the second frame plate and the fourth frame plate are disposed oppositely along the second direction; the second frame comprises a fifth frame plate, a sixth frame plate, a seventh frame plate and an eighth frame plate which are sequentially connected end to end, the fifth frame plate and the seventh frame plate are oppositely arranged along the first direction, and the sixth frame plate and the eighth frame plate are oppositely arranged along the second direction;

the fifth frame plate and the first frame plate are arranged oppositely and at intervals, the sixth frame plate and the second frame plate are arranged oppositely and at intervals, the seventh frame plate and the third frame plate are arranged oppositely and at intervals, and the eighth frame plate and the fourth frame plate are arranged oppositely and at intervals;

the first elastic piece is arranged between the fifth frame plate and the first frame plate, and/or the first elastic piece is arranged between the seventh frame plate and the third frame plate;

the second elastic member is connected between the base and at least one of the second frame plate and the fourth frame plate.

Optionally, the diffusion sheet assembly further comprises a power supply member disposed on the base; the power supply part is used for being in conductive connection with the first memory metal and/or the second memory metal;

the first memory metal comprises a first memory alloy wire, the first memory alloy wire comprises a first effective section extending along the first direction, and the first effective section is connected between the first moving layer and the second moving layer or between the second moving layer and the base; and/or the presence of a gas in the gas,

the second memory metal includes a second memory alloy wire including a second active segment extending in the second direction, and the second active segment connects the first moving layer and the base.

Optionally, the first memory alloy wire comprises a first connecting section and two first active sections, the first connecting section is connected between the two first active sections; the second frame plate and the fourth frame plate are both provided with first mounting parts, the sixth frame plate and the eighth frame plate are both provided with second mounting parts, one of the first effective sections is connected between the first mounting part on the second frame plate and the second mounting part on the sixth frame plate, and the other first effective section is connected between the first mounting part on the fourth frame plate and the second mounting part on the eighth frame plate; and/or the presence of a gas in the gas,

the second memory alloy wire comprises a second connecting section and two second effective sections, and the second connecting section is connected between the two second effective sections; the first frame plate with all be provided with the third installation department on the third frame plate, the second is effective section to be connected the third installation department with between the base.

Optionally, the second mounting portion includes a second mounting portion body and a first roller, the second mounting portion body is connected to the sixth frame plate or the eighth frame plate, the first roller is disposed on the second mounting portion body, and a portion where the first effective section and the first connecting section are connected is wound on the first roller; and/or the presence of a gas in the gas,

the third installation department includes third installation department body and second gyro wheel, this body coupling of third installation department in first frame board or third frame board, the second gyro wheel set up in third installation department body, the second effective segment with the part that the second linkage segment links to each other is around establishing on the second gyro wheel.

Optionally, the diffusion sheet assembly further includes two first rollers disposed on the base, two second mounting portions are disposed at ends of the sixth frame plate and the eighth frame plate, the two first rollers are correspondingly disposed at one sides of the two second mounting portions close to the first frame structure along the first direction, the first effective section is connected to the first mounting portions and the second mounting portions, and a portion where the first effective section is connected to the first connecting section is wound on the first rollers; and/or the presence of a gas in the gas,

the diffusion piece assembly further comprises two second idler wheels arranged on the base, the two third installation parts are respectively arranged at the ends of the first frame plate and the third frame plate, the two second idler wheels are respectively arranged at the third installation parts along the second direction close to one side of the base, the second effective section is connected to the third installation parts and the base, and the part, connected with the second connecting section, of the second effective section is wound on the second idler wheels.

Optionally, an accommodating groove is formed in the base, and the first frame structure, the second frame structure, the first elastic member, the second elastic member, the first memory alloy wire and the second memory alloy wire are all disposed in the accommodating groove;

the first memory alloy wire and the second memory alloy wire penetrate out of the accommodating groove to be electrically connected with the power supply piece.

Optionally, the diffusion sheet assembly further includes a first lead, a first through hole for communicating with the accommodating groove is formed on the base, the first memory alloy wire is fixedly connected in the first through hole, one end of the first lead is electrically connected with the first memory alloy wire in the first through hole, and the other end of the first lead is electrically connected with the power supply element; and/or the presence of a gas in the gas,

the diffusion plate assembly further comprises a second lead, a second through hole for communicating the outside and the accommodating groove is formed in the base, the second memory alloy wire is fixedly connected in the second through hole, one end of the second lead is electrically connected with the second memory alloy wire in the second through hole, and the other end of the second lead is electrically connected with the power supply part;

preferably, the first through hole and the second through hole are formed in the first side surface of the base;

the power supply part comprises a flexible circuit board, and the flexible circuit board comprises a main body part laid at the bottom of the base and a connecting part protruding out of the first side face.

Preferably, the diffusion sheet assembly further comprises a first fixing member disposed on the base, and the first memory alloy wire is fixed on the base through the first fixing member; and/or the presence of a gas in the gas,

the diffusion sheet assembly further comprises a second fixing piece arranged on the base, and the second memory alloy wire is fixed on the base through the second fixing piece.

Optionally, the diffusion sheet assembly further comprises a first limiting plate, a second limiting plate, a third limiting plate and a fourth limiting plate, the first limiting plate and the second limiting plate both extend along the first direction and are arranged at intervals along the second direction, and the first effective section is arranged between the first limiting plate and the second limiting plate; the third limiting plate and the fourth limiting plate extend along the second direction and are arranged at intervals along the first direction, and the first connecting section is arranged between the third limiting plate and the fourth limiting plate;

preferably, be formed with the holding tank on the base, the piece subassembly of diffusing still including set up in fifth limiting plate, sixth limiting plate and seventh limiting plate on the diapire in the holding tank, the inside wall of holding tank is including the first inside wall, second inside wall and the third inside wall that connect gradually, fifth limiting plate with first inside wall relative interval sets up in order to arrange one of them between these two the second is effective, sixth limiting plate with second inside wall relative interval sets up in order to arrange between these two the second linkage segment, seventh limiting plate with third inside wall relative interval sets up in order to arrange another between these two the second is effective.

Optionally, the first elastic member includes at least one first arc-shaped spring disposed along the second direction, and each first arc-shaped spring is deformable along the first direction, the first arc-shaped spring is connected between the first frame plate and the fifth frame plate, and/or the first arc-shaped spring is connected between the third frame plate and the seventh frame plate; and/or the presence of a gas in the gas,

the second elastic piece comprises at least one second arc-shaped reed arranged along the first direction, each second arc-shaped reed can deform along the second direction, and the second elastic piece is connected between at least one of the second frame plate and the fourth frame plate and the base.

Optionally, the diffusion sheet assembly further comprises a third frame, the second elastic member is connected between the third frame and the first moving layer, and the third frame is detachably mounted on the base; preferably, the first movable layer, the second movable layer, the third frame, the first elastic member, and the second elastic member are configured as an integrally formed spring structure.

Optionally, the diffuser assembly further includes a second diffuser, an opening opposite to the first diffuser is formed on the base, and the second diffuser is disposed in the opening.

The present disclosure also provides a light source device, which includes a light beam emitter, a beam reduction assembly, a light uniformizing assembly, and a scattering member disposed between the beam reduction assembly and the light uniformizing assembly, wherein the scattering member includes the diffusion sheet assembly.

The present disclosure additionally provides a projector including the light source device.

In the above technical scheme, since the first diffusion sheet is connected with the first moving layer through the first memory metal, when the temperature changes, the first memory metal can deform along the first direction, and then the first diffusion sheet can be driven to move relative to the first moving layer in the first direction. When the temperature change is recovered, the first memory metal can recover the deformation along the first direction, and the first diffusion sheet can be driven to move and reset relative to the first moving layer in the first direction.

And because the first moving layer is connected with the base through the second memory metal, when the temperature changes, the second memory metal can deform along the second direction, and then the first moving layer and the first diffusion sheet can be driven to move in the second direction relative to the base. When the temperature change is recovered, the second memory metal can recover the deformation along the second direction, and the second diffusion sheet can be driven to move and reset relative to the base in the second direction.

The temperature is switched between the first temperature range and the second temperature range, the first memory metal and the second memory metal can be continuously deformed and restored in the first direction and the second direction respectively, the first diffusion sheet can reciprocate in the first direction and the second direction, the random phase quantity of the first diffusion sheet in unit time can be increased, a better speckle eliminating effect can be obtained, the movable first diffusion sheet is compared with the traditional rotary diffusion sheet, different phase divergence angles of all positions on the first diffusion sheet are fully utilized, the coherence of light beams can be better weakened, a better speckle eliminating effect can be provided under the same size, the area utilization rate of the diffusion sheet is improved, the coherence of the light beams is better weakened, and the speckle eliminating effect is improved.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of a diffusion sheet assembly according to a first embodiment of the present disclosure;

fig. 2 is an exploded view of a diffusion sheet assembly according to a first embodiment of the present disclosure;

fig. 3 is a schematic structural view of a first moving layer, a second moving layer, a third frame, a first elastic member and a second elastic member of a diffuser assembly according to a first embodiment of the present disclosure;

fig. 4 is a schematic perspective view of a diffusion sheet assembly according to a second embodiment of the present disclosure;

fig. 5 is an exploded view schematically illustrating a diffusion sheet assembly according to a second embodiment of the present disclosure;

fig. 6 is a schematic structural view of a first moving layer, a second moving layer, a third frame, a first elastic member and a second elastic member of a diffuser assembly according to a second embodiment of the present disclosure;

FIG. 7 is a schematic structural view of the base of the diffuser assembly of the first and second embodiments of the present disclosure;

fig. 8 is a schematic view of a light source device according to an embodiment of the present disclosure.

Description of the reference numerals

1 first moving floor 11 first frame plate

12 second frame plate 13 third frame plate

14 fourth frame plate 2 second moving layer

21 fifth frame plate 22 sixth frame plate

23 seventh frame plate 24 eighth frame plate

3 first effective section of first memory metal 31

32 first connection section 4 second memory metal

41 second active section 42 second connection section

5 power supply unit 6 second fixing unit

7 third frame 10 first diffusion sheet

20 first elastic member 201 first arc reed

30 second elastic member 301 second arc reed

40 first mounting part 50 second mounting part

501 second mounting part body 502 first roller

60 third mount 601 third mount body

602 second roller 70 second diffuser

100 base 101 receiving tank

1011 first limit plate 1012 second limit plate

1013 third limit plate 1014 fourth limit plate

1015 fifth limiting plate 1016 sixth limiting plate

1017 seventh limiting plate 10101 first inner side wall

10102 second inner side wall 10103 third inner side wall

102 first through hole 103 second through hole

104 first side 200 light beam emitter

300 beam-reducing assembly 400 dodging assembly

500 diffuser 600 collimator

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, where the contrary is not stated, directional words such as "inner and outer" are used to refer to the inner and outer of the particular structural profile; the use of directional terms such as "first," "second," etc. are used merely to distinguish one element from another, and are not necessarily sequential or significant; in addition, the "first direction a" and the "second direction B" may be as shown with reference to fig. 1 and 4.

As shown in fig. 1 to 7, the present disclosure provides a diffusion sheet assembly, which includes a base 100, a first diffusion sheet 10 for light beams to pass through, a first moving layer 1, a first memory metal 3, and a second memory metal 4. The first diffusion sheet 10 is connected with the first moving layer 1 through the first memory metal 3, and the first memory metal 3 can deform along the first direction a, so that the first diffusion sheet 10 can move relative to the first moving layer 1 in the first direction a; the first moving layer 1 is connected to the base 100 through the second memory metal 4, and the second memory metal 4 can be deformed along the second direction B, so that the first moving layer 1 and the first diffusion sheet 10 can move in the second direction B relative to the base 100, and the first direction a intersects with the second direction B.

The first memory metal 3 and the second memory metal 4 are special metal materials that can recover the original macro deformation in the second temperature range after plastic deformation in the first temperature range.

In the above technical solution, since the first diffusion sheet 10 is connected to the first moving layer 1 through the first memory metal 3, when the temperature changes, the first memory metal 3 can deform along the first direction a, and then the first diffusion sheet 10 can be driven to move in the first direction a relative to the first moving layer 1. When the temperature change is recovered, the first memory metal 3 can recover its deformation along the first direction a, and the first diffusion sheet 10 can be driven to move and reset in the first direction a relative to the first moving layer 1.

And because the first moving layer 1 is connected with the base 100 through the second memory metal 4, when the temperature changes, the second memory metal 4 can deform along the second direction B, and then the first moving layer 1 and the first diffusion sheet 10 can be driven to move in the second direction B relative to the base 100. When the temperature change is recovered, the second memory metal 4 can recover its deformation along the second direction B, and the first diffusion sheet 10 can be driven to move and recover in the second direction B relative to the base 100.

By switching the temperature between the first temperature range and the second temperature range, the first memory metal 3 and the second memory metal 4 can be continuously deformed and restored in the first direction A and the second direction B respectively, so that the first diffusion sheet 10 can reciprocate in the first direction A and the second direction B, the random phase number of the first diffusion sheet 10 in unit time can be increased, and a better speckle eliminating effect can be obtained, and compared with the traditional rotary diffusion sheet, the movable first diffusion sheet 10 fully utilizes different phase divergence angles of all positions on the first diffusion sheet 10, can better weaken the coherence of light beams, can provide a better speckle eliminating effect under the same size, improve the area utilization rate of the first diffusion sheet 10, better weaken the coherence of the light beams, and improve the speckle eliminating effect.

Referring to fig. 1, 2, 4 and 5, the diffuser assembly further includes a second moving layer 2, a first elastic member 20 and/or a second elastic member 30, the first diffuser 10 is mounted to the second moving layer 2, and the first memory metal 3 connects the second moving layer 2 and the first moving layer 1; first elastic component 20 connects first removal layer 1 and second removal layer 2 and wears to establish direction H at the light beam and support second removal layer 2, and first elastic component 20 can take place deformation along first direction A, and second elastic component 30 connects first removal layer 1 and base 100 and wears to establish direction H at the light beam and support first removal layer 1, and second elastic component 30 can take place deformation along second direction B.

First, the installation of the first diffusion sheet 10 is facilitated by providing the second moving layer 2, thereby effectively protecting the first diffusion sheet 10.

Secondly, because the memory metal (SMA) has asymmetric force application characteristics, for example, when the SMA is heated, the SMA has a large contraction force and a high speed, and when the SMA is not heated, the SMA has a slow rebound speed by natural heat dissipation. Based on this, in the embodiment of the present disclosure, by providing the first elastic member 20 capable of deforming in the first direction a and/or the second elastic member 30 capable of deforming in the second direction B, the elastic force of the first elastic member 20 and the second elastic member 30 is utilized to offset the characteristic that the memory metal has a slow rebound speed, thereby ensuring that the first diffusion sheet 10 can effectively and rapidly reciprocate in the first direction a and the second direction B.

In addition, the first elastic member 20 can support the second moving layer 2 in the light beam passing direction H, that is, can support the first diffusion sheet 10 in the light beam passing direction H; the first diffusion sheet 10 can be kept stable in the light beam penetration direction H in the process of moving in the first direction A, and shaking is avoided; similarly, the second elastic member 30 can support the first movable layer 1 in the light beam penetrating direction H, so that the second movable layer 2 and the first diffusion sheet 10 can be kept stable in the light beam penetrating direction H in the moving process along the second direction B, and the light beam is prevented from shaking.

Alternatively, referring to fig. 3 and 6, the first movable layer 1 is configured as a first frame structure, the second movable layer 2 is configured as a second frame structure, and the first diffusion sheet 10 is disposed in the second frame structure, and the first frame structure is disposed at the periphery of the second frame structure in a spaced-apart manner.

In this embodiment, the first movable layer 1 and the second movable layer 2 are both provided with frame structures, and the first frame structures are sleeved on the periphery of the second frame structures at intervals, so that the overall volume and mass of the diffuser assembly are effectively reduced, and the design of miniaturization and light weight of the diffuser assembly is facilitated. However, the present disclosure does not limit the specific structural forms of the first moving layer 1 and the second moving layer 2.

Referring to fig. 3 and 6, the first frame structure includes a first frame plate 11, a second frame plate 12, a third frame plate 13, and a fourth frame plate 14, which are sequentially and end-to-end connected, the first frame plate 11 and the third frame plate 13 being disposed opposite to each other in a first direction a, and the second frame plate 12 and the fourth frame plate 14 being disposed opposite to each other in a second direction B.

The second frame includes a fifth frame plate 21, a sixth frame plate 22, a seventh frame plate 23, and an eighth frame plate 24 that are connected end to end in this order, the fifth frame plate 21 and the seventh frame plate 23 are disposed oppositely in the first direction a, and the sixth frame plate 22 and the eighth frame plate 24 are disposed oppositely in the second direction B.

The fifth frame plate 21 is disposed opposite to and spaced from the first frame plate 11, the sixth frame plate 22 is disposed opposite to and spaced from the second frame plate 12, the seventh frame plate 23 is disposed opposite to and spaced from the third frame plate 13, and the eighth frame plate 24 is disposed opposite to and spaced from the fourth frame plate 14.

A first spring 20 is arranged between the fifth frame plate 21 and the first frame plate 11, and/or a first spring 20 is arranged between the seventh frame plate 23 and the third frame plate 13; a second elastic member 30 is connected between at least one of the second frame plate 12 and the fourth frame plate 14 and the base 100.

In this embodiment, by setting both the first frame structure and the second frame structure to be rectangular frame structures, the modular design of the diffuser sheet assembly is facilitated on the one hand, and the light and thin design of the diffuser sheet assembly is facilitated on the other hand. In addition, by disposing the first elastic member 20 between the fifth frame plate 21 and the first frame plate 11 which are spaced apart from each other, and/or disposing the first elastic member 20 between the seventh frame plate 23 and the third frame plate 13 which are spaced apart from each other, the spaced-apart space is fully utilized, the utilization of the space is improved, and the compact design of the diffuser assembly is facilitated.

In one embodiment, referring to fig. 1, 2, 4 and 5, the diffuser assembly further includes a power supply 5 disposed on the base 100; the power supply part 5 is used for being in conductive connection with the first memory metal 3 and/or the second memory metal 4; the first memory metal 3 comprises a first memory alloy wire comprising a first active segment 31 extending in a first direction a, the first active segment 31 being connected between the first moving layer 1 and the second moving layer 2 or between the second moving layer 2 and the base 100, and/or the second memory metal 4 comprises a second memory alloy wire comprising a second active segment 41 extending in a second direction B, and the second active segment 41 connecting the first moving layer 1 and the base 100.

In the case where the first effective segment 31 connects the first moving layer 1 and the second moving layer 2, the second moving layer 2 can move in the first direction a with respect to the first moving layer 1 under the deformation of the first effective segment 31; in the case where the first effective segment 31 connects the second moving layer 2 and the base 100, the second moving layer 2 can move in the first direction a with respect to the base 100 under the deformation of the first effective segment 31.

In this embodiment, by providing the power supply member 5, and the power supply member 5 is used for electrically connecting with the first memory metal 3 and/or the second memory metal 4, when the first memory metal 3 and/or the second memory metal 4 is in a state of electrically connecting with the power supply member 5, the first memory metal 3 and/or the second memory metal 4 is heated after being energized, and in a case where the first memory metal 3 and/or the second memory metal 4 is heated to be within the first temperature range, the first memory metal 3 and/or the second memory metal 4 is deformed; thereby driving the first diffusion sheet 10 to move in the first direction a and the second direction B; when the electric conduction is broken, the first memory metal 3 and/or the second memory metal 4 is cooled to the second temperature range, the first memory metal 3 and/or the second memory metal 4 is/are deformed again, and in the process of deformation recovery, the first diffusion sheet 10 can be driven to move in the first direction a and the second direction B.

In addition, the first memory metal 3 and/or the second memory metal 4 are designed into memory alloy wires, so that the weight of the diffusion sheet assembly can be effectively reduced. The first effective section 31 can extend and retract along the first direction a, and then can drive the second moving layer 2 to move in the first direction a relative to the first moving layer 1; the second effective segment 41 can extend and retract along the second direction B, and further can drive the first moving layer 1 and the second moving layer 2 to move in the second direction B relative to the base 100.

Specifically, referring to fig. 1 and 4, the first memory alloy wire includes a first connection section 32 and two first effective sections 31, the first connection section 32 being connected between the two first effective sections 31; the second frame plate 12 and the fourth frame plate 14 are each provided with an inwardly projecting first mounting portion 40, the sixth frame plate 22 and the eighth frame plate 24 are each provided with an outwardly projecting second mounting portion 50, one of the first effective sections 31 is connected between the first mounting portion 40 on the second frame plate 12 and the second mounting portion 50 on the sixth frame plate 22, and the other first effective section 31 is connected between the first mounting portion 40 on the fourth frame plate 14 and the second mounting portion 50 on the eighth frame plate 24; and/or the second memory alloy wire comprises a second connecting section 42 and two second effective sections 41, wherein the second connecting section 42 is connected between the two second effective sections 41; the first frame plate 11 and the third frame plate 13 are each provided with a third mount portion 60 projecting outward, and the second effective section 41 is connected between the third mount portion 60 and the base 100.

In this embodiment, the first memory alloy wire includes two first effective sections 31, and both the two first effective sections 31 can deform along the first direction a during the deformation process, so as to effectively increase the driving force for the second moving layer 2 in the first direction a. Similarly, the second memory alloy wire includes two second effective sections 41, and in the process of deformation, the two second effective sections 41 can both deform along the second direction B, thereby effectively improving the driving force for the first moving layer 1 and the second moving layer 2 in the second direction B.

In addition, the first installation part 40 and the second installation part 50 are arranged, so that the first effective section 31 can be conveniently connected with the first moving layer 1 and the second moving layer 2, the connection convenience is improved, in addition, the first installation part 40 and the second installation part 50 are uniformly distributed in the space between the first moving layer 1 and the second moving layer 2, the space utilization rate is improved, and the compact design is convenient; the third mounting portion 60 can facilitate the second effective segment 41 to connect the first movable layer 1 with the base 100, thereby improving the convenience of connection.

Alternatively, as shown in fig. 4 and 5, the second mount 50 includes a second mount body 501 and a first roller 502, the second mount body 501 is connected to the sixth frame plate 22 or the eighth frame plate 24, the first roller 502 is provided to the second mount body 501, and a portion where the first effective section 31 and the first connection section 32 are connected is wound around the first roller 502; and/or, the third mount 60 includes a third mount body 601 and a second roller 602, the third mount body 601 is connected to the first frame plate 11 or the third frame plate 13, the second roller 602 is disposed on the third mount body 601, and a portion where the second effective section 41 and the second connection section 42 are connected is wound on the second roller 602.

Alternatively, the roller may be rotatably disposed on the corresponding mounting portion body; or may be fixedly arranged on the corresponding mounting part body, and the memory alloy wire wound on the mounting part body can slide relative to the mounting part body.

In this embodiment, since the connection portion of the first effective segment 31 and the first connecting segment 32 of the first memory alloy wire is wound around the first roller 502, and the distance between the two first rollers 502 of the two first mounting portions 40 is constant, when the first memory alloy wire is deformed by being energized, the deformation amount of the first connecting segment 32 between the two first rollers 502 can be superposed on the two first effective segments 31 on the two sides, so that the deformation amount of the two first effective segments 31 in the first direction a is increased, the movement stroke of the first diffusion sheet 10 in the first direction a relative to the first moving layer 1 is increased, and the speckle dissipation effect in the first direction a is improved. Similarly, the two second rollers 602 can also increase the deformation amount of the two second effective segments 41 in the second direction B, thereby increasing the moving stroke of the first diffusion sheet 10 in the second direction B relative to the base 100, and improving the speckle elimination effect in the second direction B.

In another embodiment, referring to fig. 1 and 2, the diffusion sheet assembly further includes two first rollers 502 disposed on the base 100, two second mounting portions 50 may be disposed on the same side of the sixth frame plate 22 and the eighth frame plate 24, two first rollers 502 are correspondingly disposed on one side of the two second mounting portions 50 close to the first frame structure along the first direction a, the first effective section 31 may be fixedly connected to the first mounting portion 40 and the second mounting portion 50, and a portion where the first effective section 31 and the first connecting section 32 are connected is wound on the first roller 502; and/or the presence of a gas in the gas,

the diffusion sheet assembly further includes two second rollers 602 rotatably disposed on the base 100, the two third mounting portions 60 may be disposed at the same side ends of the first frame plate 11 and the third frame plate 13, the two second rollers 602 are disposed at one sides of the third mounting portions 60 close to the base 100 along the second direction B, the second effective section 41 may be fixedly connected to the third mounting portions 60 and the base 100, and a portion of the second effective section 41 connected to the second connecting section 42 is wound around the second roller 602.

In this embodiment, the roller is not provided on the mounting portion but is rotatably provided on the base 100, and although it is not possible to increase the amount of deformation of the two first effective segments 31 in the first direction a and increase the amount of deformation of the two second effective segments 41 in the second direction B, the roller is similarly designed to function to guide the memory alloy wire to be deformed.

Referring to fig. 7, a receiving groove 101 is formed on the base 100, and the first frame structure, the second frame structure, the first elastic member 20, the second elastic member 30, the first memory alloy wire and the second memory alloy wire are all disposed in the receiving groove 101; the power supply member 5 may be connected to the outside of the base 100, and the first memory alloy wire and the second memory alloy wire are passed out of the receiving groove 101 to be electrically connected to the power supply member 5.

In this embodiment, by forming the housing groove 101 in the base 100 and disposing most of the components of the diffuser assembly in the housing groove 101, the design of the diffuser assembly to be thin and thin is facilitated while effectively protecting the respective components. The power supply unit 5 is disposed outside the base 100 to facilitate maintenance or replacement of the wearing parts.

In some embodiments, referring to fig. 1, 2, 4 and 5, the diffuser assembly further includes a first conductive wire (not shown), the base 100 is formed with a first through hole 102 for communicating with the accommodating groove 101, the first memory alloy wire is fixedly connected in the first through hole 102, one end of the first conductive wire is electrically connected to the first memory alloy wire in the first through hole 102, and the other end of the first conductive wire is electrically connected to the power supply 5; and/or, the diffuser assembly further includes a second wire (not shown), a second through hole 103 for communicating the outside and the accommodating groove 101 is formed on the base 100, the second memory alloy wire is fixedly connected in the second through hole 103, one end of the second wire is electrically connected with the second memory alloy wire in the second through hole 103, and the other end of the second wire is electrically connected with the power supply 5.

In this embodiment, the first through hole 102 and the second through hole 103 are provided, the first memory alloy wire is fixedly connected in the first through hole 102, the second memory alloy wire is fixedly connected in the second through hole 103, and the first memory alloy wire and the second memory alloy wire are electrically connected to the power supply unit 5 through the first lead wire and the second lead wire.

The reason why the first memory alloy wire and the second memory alloy wire are not directly electrically connected to the power supply unit 5 is to take into account that when the first memory alloy wire and the second memory alloy wire are deformed, the connection portion with the power supply unit 5 is pulled, which may cause poor contact with the power supply unit 5.

And through with first memory alloy line fixed connection in first through-hole 102, make second memory alloy line fixed connection in second through-hole 103, when first memory alloy line and second memory alloy line take place the deformation, the stress point acts on first through-hole 102 and second through-hole 103 department respectively, and can not act on power supply 5 department directly, and then guarantee that the bad condition of connection can not appear and take place.

Referring to fig. 1, 2, 4 and 5, the first through hole 102 and the second through hole 103 are formed on the first side surface 104 of the base 100; the power supply member 5 includes a flexible circuit board including a main body portion 51 laid on the bottom of the base 100 and a connection portion 52 protruding from the first side surface 104.

By disposing the first through hole 102 and the second through hole 103 on the first side surface 104 of the base 100, and the power supply 5 configured as a flexible circuit board includes the connecting portion 52 protruding from the first side surface 104, it is possible to facilitate the above-mentioned first wire to electrically connect the first memory alloy wire and the connecting portion 52, and to facilitate the second wire to electrically connect the second memory alloy wire and the connecting portion.

Optionally, the diffusion sheet assembly further includes a first fixing member (not shown) disposed on the base 100, and the first memory alloy wire is fixed on the base 100 by the first fixing member; and/or, the diffusion sheet assembly further comprises a second fixing member 6 disposed on the base 100, and the second memory alloy wire is fixed on the base 100 through the second fixing member 6. Through the design of the fixing piece, the first memory alloy wire and/or the second memory alloy wire are/is conveniently fixed on the base 100, and the situation that the first memory alloy wire and/or the second memory alloy wire are separated from the base 100 in the deformation process is avoided.

Alternatively, the first and second fixing members 6 may be configured as a pressing sheet structure, but the present disclosure does not limit the specific structure type of the first and second fixing members 6.

Referring to fig. 7, the diffusion sheet assembly further includes a first limiting plate 1011, a second limiting plate 1012, a third limiting plate 1013, and a fourth limiting plate 1014, wherein the first limiting plate 1011 and the second limiting plate 1012 both extend along the first direction a and are arranged at intervals along the second direction B, and the first effective segment 31 is arranged between the first limiting plate 1011 and the second limiting plate 1012; the third and fourth limiting

plates

1013, 1014 each extend in the second direction B and are spaced apart in the first direction a, and the first connecting segment 32 is disposed between the third and fourth limiting

plates

1013, 1014.

Optionally, the base 100 is formed with a receiving groove 101, the diffusion sheet assembly further includes a fifth limiting plate 1015, a sixth limiting plate 1016 and a seventh limiting plate 1017 disposed on an inner bottom wall of the receiving groove, the inner side wall of the receiving groove 101 includes a first inner side wall 10101, a second inner side wall 10102 and a third inner side wall 10103 connected in sequence, the fifth limiting plate 1015 and the first inner side wall 10101 are relatively spaced to arrange one of the second effective sections 41 therebetween, the sixth limiting plate 1016 and the second inner side wall 10102 are relatively spaced to arrange the second connecting section 42 therebetween, and the seventh limiting plate 1017 and the third inner side wall 10103 are relatively spaced to arrange another second effective section 41 therebetween.

In this embodiment, the first limiting plate 1011 and the second limiting plate 1012 are designed to effectively guide the first effective segment 31 to deform in the first direction a, and to prevent the first effective segment 31 from shaking in the second direction B in the process of deforming in the first direction a. The third and fourth limiting

plates

1013 and 1014 can guide the first connecting section 32 to be deformed in the second direction B, and can prevent the first connecting section 32 from shaking in the first direction a in the process of being deformed in the second direction B.

Similarly, the fifth limiting plate 1015, the sixth limiting plate 1016, and the seventh limiting plate 1017 are also for guiding the deformation of the second memory alloy wire and preventing the second memory alloy wire from shaking, and are not described herein again.

In one embodiment, referring to fig. 3 and 6, the first elastic member 20 includes at least one first arc-shaped spring 201 disposed along the second direction B, and each first arc-shaped spring 201 is deformable along the first direction a, the first arc-shaped spring 201 is connected between the first frame plate 11 and the fifth frame plate 21, and/or the first arc-shaped spring 201 is connected between the third frame plate 13 and the seventh frame plate 23; and/or the second elastic member 30 comprises at least one second arc-shaped spring 301 arranged along the first direction a, each second arc-shaped spring 301 is capable of deforming along the second direction B, and the second elastic member 30 is connected between the base 100 and at least one of the second frame plate 12 and the fourth frame plate 14.

In this embodiment, by providing the elastic member as at least one arc-shaped spring, deformation can be ensured and a good supporting function can be achieved. However, the present disclosure does not limit the specific structure of the first and second

elastic members

20 and 30.

Alternatively, referring to fig. 1 and 4, the diffuser assembly further includes a third frame 7, the second elastic member 30 is connected between the third frame 7 and the first moving layer 1, and the third frame 7 is detachably mounted on the base 100. Through setting up this third frame 7, be convenient for realize first removal layer 1 and the dismantlement of base 100 is connected, improves the convenience of connecting.

In other embodiments, the first mobile layer 1, the second mobile layer 2, the third rim 7, the first elastic member 20, and the second elastic member 30 are configured as an integrally formed spring structure. The diffusion piece component is convenient to form and process, and meanwhile, the design of lightness, thinness and modularization of the diffusion piece component is utilized.

For example, the spring structure is configured as a metal spring structure, and when the first memory metal 3 and the second memory metal 4 are connected with the metal spring structure, an insulation connection should be performed, for example, the purpose of insulation isolation may be achieved by providing an insulation tape, mylar film, or the like.

Alternatively, referring to fig. 7, the diffuser assembly further includes a second diffuser 70, and the base 100 is formed with an opening 105 opposite to the first diffuser 10, the second diffuser 70 being disposed in the opening 105. That is, the second diffusion sheet 70 is configured as a static diffusion sheet, and the first diffusion sheet 10 is configured as a dynamic diffusion sheet, and a more desirable speckle-dispersing effect can be achieved by the superposition of the static diffusion sheet and the dynamic diffusion sheet.

Referring to fig. 8, the present disclosure also provides a light source apparatus including a light beam emitter 200, a beam reduction assembly 300, a light unifying assembly 400, and a scattering member 500 disposed between the beam reduction assembly 300 and the light unifying assembly 400, the scattering member 500 including the above-described diffuser assembly.

Alternatively, the beam reduction assembly 300 may be a set of galilean telescope, the objective lens is a positive meniscus lens, the secondary lens is a negative biconcave lens, and the dodging assembly 400 may employ a fly eye lens or a dodging rod.

In addition, as shown in fig. 8, a collimating element 600 may be disposed between the diffusing element 500 and the light homogenizing assembly 400, and the collimating element 600 may be a sheet or a group of condensing lenses, and the light source device can provide better speckle reduction effect with the same size by using different phase divergence angles at all positions on the first diffusing sheet 10.

The present disclosure further provides a projector including the light source device, and the projector has all the advantages of the diffuser assembly and the light source device, which are not described herein in detail.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A diffusion sheet assembly is characterized by comprising a base (100), a first diffusion sheet (10) for light beams to penetrate through, a first moving layer (1), a first memory metal (3) and a second memory metal (4);

the first diffusion sheet (10) is connected to the first moving layer (1) by the first memory metal (3), and the first memory metal (3) is deformable in a first direction (A) so that the first diffusion sheet (10) can move in the first direction (A) relative to the first moving layer (1);

the first mobile layer (1) is connected to the base (100) by the second memory metal (4), and the second memory metal (4) is deformable in a second direction (B) so that the first mobile layer (1) and the first diffusion sheet (10) are movable in the second direction (B) with respect to the base (100), and the first direction (A) and the second direction (B) intersect.

2. A diffuser assembly according to claim 1, further comprising a second moving layer (2), wherein the first diffuser (10) is mounted to the second moving layer (2), and wherein the first memory metal (3) connects the second moving layer (2) and the first moving layer (1);

the diffusion sheet assembly further comprises a first elastic member (20), the first elastic member (20) is connected with the first moving layer (1) and the second moving layer (2) and supports the second moving layer (2) in a light beam penetrating direction (H), and the first elastic member (20) can deform along the first direction (A),

and/or the diffuser assembly further comprises a second elastic member (30), the second elastic member (30) connects the first moving layer (1) and the base (100) and supports the first moving layer (1) in a beam penetration direction (H), and the second elastic member (30) can deform along the second direction (B);

preferably, the first moving layer (1) is configured as a first frame structure, the second moving layer (2) is configured as a second frame structure, the first diffusion sheet (10) is arranged in the second frame structure, and the first frame structure is arranged at the periphery of the second frame structure in a spaced manner.

3. A diffuser plate assembly according to claim 2, wherein the first frame structure comprises a first frame plate (11), a second frame plate (12), a third frame plate (13), and a fourth frame plate (14) connected in series and end-to-end, the first frame plate (11) and the third frame plate (13) being disposed opposite in the first direction (a), the second frame plate (12) and the fourth frame plate (14) being disposed opposite in the second direction (B); the second frame comprises a fifth frame plate (21), a sixth frame plate (22), a seventh frame plate (23) and an eighth frame plate (24) which are connected end to end in sequence, the fifth frame plate (21) and the seventh frame plate (23) are oppositely arranged along the first direction (A), and the sixth frame plate (22) and the eighth frame plate (24) are oppositely arranged along the second direction (B);

the fifth frame plate (21) and the first frame plate (11) are oppositely and spacedly arranged, the sixth frame plate (22) and the second frame plate (12) are oppositely and spacedly arranged, the seventh frame plate (23) and the third frame plate (13) are oppositely and spacedly arranged, and the eighth frame plate (24) and the fourth frame plate (14) are oppositely and spacedly arranged;

-the first spring (20) is arranged between the fifth frame plate (21) and the first frame plate (11), and/or-the first spring (20) is arranged between the seventh frame plate (23) and the third frame plate (13);

the second elastic member (30) is connected between the base (100) and at least one of the second frame plate (12) and the fourth frame plate (14).

4. The diffuser assembly of claim 3, further comprising a power supply (5) disposed on the base (100); the power supply piece (5) is used for being in conductive connection with the first memory metal (3) and/or the second memory metal (4);

the first memory metal (3) comprises a first memory alloy wire comprising a first active segment (31) extending along the first direction (A), and the first active segment (31) is connected between the first moving layer (1) and the second moving layer (2) or between the second moving layer (2) and the base (100); and/or the presence of a gas in the gas,

the second memory metal (4) comprises a second memory alloy wire comprising a second active segment (41) extending along the second direction (B), and the second active segment (41) connects the first mobile layer (1) and the base (100).

5. The diffuser element of claim 4, wherein said first memory alloy wire comprises a first connecting section (32) and two of said first active sections (31), said first connecting section (32) being connected between two of said first active sections (31); -first mountings (40) are provided on both the second frame plate (12) and the fourth frame plate (14), -second mountings (50) are provided on both the sixth frame plate (22) and the eighth frame plate (24), one of which first active segments (31) is connected between the first mountings (40) on the second frame plate (12) and the second mountings (50) on the sixth frame plate (22), the other of which first active segments (31) is connected between the first mountings (40) on the fourth frame plate (14) and the second mountings (50) on the eighth frame plate (24); and/or the presence of a gas in the gas,

the second memory alloy wire comprises a second connecting section (42) and two second effective sections (41), wherein the second connecting section (42) is connected between the two second effective sections (41); the first frame plate (11) with all be provided with third installation department (60) on third frame plate (13), second effective section (41) are connected third installation department (60) with between base (100).

6. The diffuser assembly of claim 5, wherein the second mount part (50) includes a second mount body (501) and a first roller (502), the second mount body (501) is connected to the sixth frame plate (22) or the eighth frame plate (24), the first roller (502) is provided to the second mount body (501), and a portion where the first effective section (31) and the first connection section (32) are connected is wound around the first roller (502); and/or the presence of a gas in the gas,

third installation department (60) include third installation department body (601) and second gyro wheel (602), third installation department body (601) connect in first frame plate (11) or third frame plate (13), second gyro wheel (602) set up in third installation department body (601), second effective section (41) with the part that second linkage segment (42) link to each other is around establishing on second gyro wheel (602).

7. The diffuser member assembly according to claim 5, further comprising two first rollers (502) provided to the base (100), two second mounting portions (50) provided to ends of the sixth frame plate (22) and the eighth frame plate (24), respectively, two first rollers (502) provided to sides of the two second mounting portions (50) adjacent to the first frame structure in the first direction (A), respectively, the first effective section (31) connected to the first mounting portion (40) and the second mounting portion (50), and a portion where the first effective section (31) and the first connecting section (32) are connected to the first rollers (502); and/or the presence of a gas in the gas,

the diffusion sheet assembly further comprises two second rollers (602) arranged on the base (100), two third installation parts (60) are respectively arranged at the ends of the first frame plate (11) and the third frame plate (13), two second rollers (602) are respectively arranged at the third installation parts (60) along the second direction (B) close to one side of the base (100), a second effective section (41) is connected to the third installation parts (60) and the base (100), and the second effective section (41) and the part connected with the second connecting section (42) are wound on the second rollers (602).

8. The diffuser assembly of claim 4, wherein a receiving groove (101) is formed on the base (100), and the first frame structure, the second frame structure, the first elastic member (20), the second elastic member (30), the first memory alloy wire and the second memory alloy wire are all disposed in the receiving groove (101);

the first memory alloy wire and the second memory alloy wire penetrate out of the accommodating groove (101) to be electrically connected with the power supply part (5).

9. The diffuser assembly according to claim 8, further comprising a first lead, wherein a first through hole (102) for communicating with the accommodating groove (101) is formed in the base (100), the first memory alloy wire is fixedly connected in the first through hole (102), one end of the first lead is electrically connected with the first memory alloy wire in the first through hole (102), and the other end of the first lead is electrically connected with the power supply member (5); and/or the presence of a gas in the gas,

the diffusion plate assembly further comprises a second lead, a second through hole (103) used for communicating the outside and the accommodating groove (101) is formed in the base (100), the second memory alloy wire is fixedly connected into the second through hole (103), one end of the second lead is electrically connected with the second memory alloy wire in the second through hole (103), and the other end of the second lead is electrically connected with the power supply part (5);

preferably, the first through hole (102) and the second through hole (103) are both formed on a first side surface (104) of the base (100);

the power supply part (5) comprises a flexible circuit board, and the flexible circuit board comprises a main body part (51) laid at the bottom of the base (100) and a connecting part (52) protruding out of the first side surface (104);

preferably, the diffusion sheet assembly further comprises a first fixing member disposed on the base (100), and the first memory alloy wire is fixed on the base (100) by the first fixing member; and/or the presence of a gas in the gas,

the diffusion sheet assembly further comprises a second fixing piece (6) arranged on the base (100), and the second memory alloy wire is fixed on the base (100) through the second fixing piece (6).

10. The diffuser assembly of claim 5, further comprising a first limiting plate (1011), a second limiting plate (1012), a third limiting plate (1013), and a fourth limiting plate (1014), wherein the first limiting plate (1011) and the second limiting plate (1012) each extend along the first direction (A) and are arranged at intervals along the second direction (B), and wherein the first effective section (31) is arranged between the first limiting plate (1011) and the second limiting plate (1012); -the third and fourth limit plates (1013, 1014) each extend in the second direction (B) and are arranged at intervals in the first direction (a), the first connection segment (32) being arranged between the third limit plate (1013) and the fourth limit plate (1014);

preferably, a containing groove (101) is formed on the base (100), the diffuser assembly further comprises a fifth limiting plate (1015), a sixth limiting plate (1016) and a seventh limiting plate (1017) which are arranged on the inner bottom wall of the containing groove, the inner side wall of the accommodating groove (101) comprises a first inner side wall (10101), a second inner side wall (10102) and a third inner side wall (10103) which are sequentially connected, the fifth limiting plate (1015) and the first inner side wall (10101) are oppositely arranged at intervals to arrange one of the second effective sections (41) between the fifth limiting plate and the first inner side wall, the sixth limiting plate (1016) and the second inner side wall (10102) are oppositely disposed at an interval to arrange the second connecting section (42) therebetween, the seventh limiting plate (1017) and the third inner side wall (10103) are oppositely disposed at an interval to dispose another second effective segment (41) therebetween.

11. A diffuser assembly according to claim 3, wherein said first elastic member (20) comprises at least one first arched leaf (201) arranged along said second direction (B), and each of said first arched leaves (201) is deformable along said first direction (a), said first arched leaf (201) being connected between said first frame plate (11) and said fifth frame plate (21), and/or said first arched leaf (201) being connected between said third frame plate (13) and said seventh frame plate (23); and/or the presence of a gas in the gas,

the second elastic member (30) includes at least one second arc-shaped spring (301) provided along the first direction (a), and each of the second arc-shaped springs (301) is deformable along the second direction (B), and the second elastic member (30) is connected between the base (100) and at least one of the second frame plate (12) and the fourth frame plate (14).

12. A diffuser assembly according to any of claims 2-11, further comprising a third frame (7), said second resilient member (30) connecting between said third frame (7) and said first moving layer (1), said third frame (7) being removably mounted on said base (100); preferably, the first movable layer (1), the second movable layer (2), the third rim (7), the first elastic member (20), and the second elastic member (30) are configured as an integrally formed spring structure.

13. A light source arrangement comprising a light beam emitter (200), a beam reduction assembly (300), a light unifying assembly (400), and a scattering member (500) arranged between the beam reduction assembly (300) and the light unifying assembly (400), characterized in that the scattering member (500) comprises a diffuser assembly according to any one of claims 1-12.

14. A projector characterized in that it comprises a light source device according to claim 13.