CN218630350U - Diffusion piece module, ray apparatus and projecting apparatus - Google Patents

Abstract

The disclosure relates to a diffusion sheet module, an optical machine and a projector. The diffusion piece module includes: a base; the mounting assembly is movably arranged on the base; the first diffusion sheet is arranged on the mounting assembly; the driving assembly is connected with the mounting assembly and is used for driving the mounting assembly to drive the first diffusion sheet to reciprocate along at least one direction on the plane where the first diffusion sheet is located; and the second diffusion sheet is arranged on the base and is positioned on the light incident side of the first diffusion sheet. The diffusion piece module has a good speckle eliminating effect.

Description

Diffusion sheet module, optical machine and projector

Technical Field

The utility model relates to a laser projection technical field especially includes a diffusion piece module, including diffusing the ray apparatus of piece module and including diffusing the projecting apparatus of piece module.

Background

Speckle elimination is a relatively popular research subject in laser projection, and reducing the spatial and temporal coherence of laser is an effective way to realize speckle elimination. Generally, a plurality of diffusion sheets are disposed at different positions of an optical path to achieve a speckle reduction effect.

The diffusion sheet is divided into a static diffusion sheet and a dynamic diffusion sheet, and the effect of eliminating speckles of the dynamic diffusion sheet is superior to that of the static diffusion sheet. The existing dynamic diffusion sheet mostly adopts a rotary diffusion wheel form, the principle of the diffusion sheet is the superposition of a plurality of independent speckle patterns in unit time, and under the condition of certain rotating speed, the random phase number of the diffusion sheet in unit time is increased, so that a better speckle eliminating effect can be obtained. A diffuser near the laser light source assembly is used to eliminate the smaller spots and the smaller the size of the diffuser that is needed. However, in the rotary type diffusion wheel, the small diffusion sheet provides a small random phase, and the effect of the extinction unevenness is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a diffusion piece module, ray apparatus and projecting apparatus can realize better speckle effect that disappears.

In a first aspect, the present disclosure relates to a diffuser module, comprising: a base; a mounting assembly movably disposed on the base; the first diffusion sheet is arranged on the mounting assembly; the driving assembly is connected with the mounting assembly and is used for driving the mounting assembly to drive the first diffusion sheet to reciprocate along at least one direction on the plane where the first diffusion sheet is located; and the second diffusion sheet is arranged on the base and is positioned on the light incident side of the first diffusion sheet.

In some embodiments, the mounting assembly includes a first mounting seat movably disposed on the base and a second mounting seat movably disposed on the first mounting seat, and the driving assembly includes a first driving portion connected to the first mounting seat and configured to drive the first mounting seat to reciprocate relative to the base in a first direction, and a second driving portion connected to the second mounting seat and configured to drive the second mounting seat to reciprocate relative to the first mounting seat in a second direction, where the first direction and the second direction are in a plane in which the first diffusion sheet is located and intersect with each other.

In some embodiments, the diffuser module further includes a first elastic member and a second elastic member, the first elastic member connects the first mounting seat and the base and is deformable in the first direction to enable the first mounting seat to move in the first direction relative to the base, and the second elastic member connects the second mounting seat and the first mounting seat and is deformable in the second direction to enable the second mounting seat to move in the second direction relative to the first mounting seat.

In some embodiments, the first and second mounting seats are each configured as a frame structure, the second mounting seat is movably disposed in the first mounting seat, the second elastic member is located between the second mounting seat and the first mounting seat, and the first diffusion sheet is fixedly disposed in the second mounting seat.

In some embodiments, the first driving part comprises a first magnet and a first conductor which are oppositely arranged, one of the first magnet and the first conductor is arranged on the base, and the other one of the first magnet and the first conductor is arranged on the first mounting seat; and/or the second driving part comprises a second magnet and a second conductor which are arranged oppositely, one of the second magnet and the second conductor is arranged on the base, and the other one of the second magnet and the second conductor is arranged on the second mounting seat.

In some embodiments, the diffuser module further comprises a first magnetic shielding sheet and a second magnetic shielding sheet, the first magnetic shielding sheet is located between the first magnet and the second elastic member, and the second magnetic shielding sheet is located between the second magnet and the first elastic member.

In some embodiments, the first conductor and/or the second conductor is a coil, and an annular end face of the coil is affixed to the base.

In some embodiments, the diffuser module further includes a first detection element for detecting motion information of the first mount and a second detection element for detecting motion information of the second mount.

In some embodiments, the base includes a connecting portion, a buffer is disposed on the connecting portion, the connecting portion is used for connecting a housing of the optical engine, and the buffer is configured to: when the connecting portion are connected the casing of ray apparatus, the blotter can press from both sides and locate connecting portion with between the casing of ray apparatus.

In some embodiments, the base includes a through hole, the first diffusion sheet is opposite to the through hole, and the second diffusion sheet is fixedly disposed in the through hole.

In a second aspect, the disclosure further relates to an optical machine, which comprises a light source assembly, a first light homogenizing device and a diffusion sheet module in any one of the above embodiments, wherein the diffusion sheet module is located between the light source assembly and the first light homogenizing device, the first diffusion sheet is located on one side, close to the first light homogenizing device, of the diffusion sheet module, and the second diffusion sheet is located on one side, close to the light source assembly, of the diffusion sheet module.

In some embodiments, the optical engine further includes a first shaping lens group, a second light homogenizing device, a second shaping lens group, a spatial light modulator, and a lens assembly, the light source assembly is configured to emit first light including light beams of different colors, the diffusion sheet module is configured to scatter the first light to emit second light, the first light homogenizing device is configured to homogenize the second light to emit third light, the first shaping lens group is configured to combine light beams of different colors in the third light to the second light homogenizing device to form white fourth light, the second light homogenizing device is configured to homogenize the fourth light to emit fifth light, the second shaping lens group is configured to guide the fifth light to the spatial light modulator and guide image light of the spatial light modulator to the lens assembly, and the lens assembly is configured to project the image light.

In a third aspect, the present disclosure further relates to a projector including the optical engine in any of the above embodiments.

According to the diffusion sheet module, the driving assembly drives the first diffusion sheet arranged on the mounting assembly to reciprocate along at least one direction on the plane where the first diffusion sheet is located, so that the first diffusion sheet which can reciprocate along at least one direction on the plane where the first diffusion sheet is located has a larger coverage area compared with a rotary diffusion sheet under the condition of the same size, different phase divergence angles on the diffusion sheet can be fully utilized, and a better speckle eliminating effect is realized; and, through the combination use of the first diffusion piece of developments that can move relative to the base and the second diffusion piece of static that is fixed setting on the base, further improve and dispel the spot effect.

Drawings

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

Fig. 1 is a schematic perspective view of a diffusion sheet module in an embodiment provided by the present disclosure;

FIG. 2 is an exploded view of the diffuser module of FIG. 1;

FIG. 3 is a cross-sectional view of the diffuser module of FIG. 1 taken along line III-III;

FIG. 4 is a cross-sectional view of the diffuser module of FIG. 1 taken along line IV-IV;

FIG. 5 is a cross-sectional view of the diffuser module of FIG. 1 taken along line V-V;

fig. 6 is a schematic structural diagram of an optical machine in an embodiment provided in the present disclosure.

Description of the reference numerals:

diffusion sheet module 100

Base 10

First mount 20

Second mounting seat 30

First diffusion sheet 40

First driving part 50

Second driving part 60

Second diffusion sheet 70

Connecting part 11

Cushion pad 111

Light transmission part 101

First elastic member 80

Second elastic member 90

First body 81

First support 82

First opening 811

First edge 8111

First buckle structure 83

Second snap structure 84

First positioning hole 821

First positioning block 21

Second body 91

Second support portion 92

Second opening 911

Second edge 9111

Third snap structure 93

Fourth snap structure 94

Second positioning hole 921

Second positioning block 31

First magnet 51

First conductor 52

Second magnet 61

Second conductor 62

First straight line segment 521

Second straight line segment 621

First single magnet 511

Second single magnet 512

Third single magnet 611

Fourth single magnet 612

First neutral layer 53

Second neutral layer 63

First detecting element 110

Second detecting element 120

Circuit board 130

The first magnetic shield sheet 140

The second magnetic shield piece 150

Optical machine 200

Light source assembly 210

The first light homogenizing device 220

First shaping lens 230

Group of

The second light homogenizing device 240

Second shaping lens 250

Group of

Spatial light modulator 260

Lens assembly 270

First lens 231

Second lens 251

Polarizing device 252

Detailed Description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.

Referring to fig. 1 to 3, an embodiment of the disclosure provides a diffuser module 100, which is applied in an optical machine (not shown). The diffusion sheet module 100 includes a base 10, a mounting assembly, a first diffusion sheet 40, a driving assembly, and a second diffusion sheet 70. The mounting assembly is movably disposed on the base 10. The first diffusion sheet 40 is disposed on the mounting assembly. The driving component is connected with the mounting component and is used for driving the mounting component to drive the first diffusion sheet 40 to move back and forth along at least one direction on the plane of the first diffusion sheet 40. The second diffusion sheet 70 is disposed on the base 10 and on the light incident side of the first diffusion sheet 40. The first diffusion sheet 40 and the second diffusion sheet 70 are arranged at intervals in the light incident direction Z. In this embodiment, the incident direction Z of the light is perpendicular to the plane of the first diffusion sheet 40.

The driving component drives the first diffusion sheet 40 arranged on the mounting component to reciprocate along at least one direction on the plane of the first diffusion sheet 40, so that under the condition of the same size, compared with a rotary diffusion sheet, the first diffusion sheet 40 which can reciprocate along at least one direction on the plane of the first diffusion sheet 40 has a larger coverage area, and different phase divergence angles on the diffusion sheet can be fully utilized to realize a better speckle eliminating effect; further, the combination use of the dynamic first diffusion sheet 40 that can move relative to the base 10 and the static second diffusion sheet 70 that is fixedly provided on the base 10 further improves the speckle-dispersing effect.

In this embodiment, the mounting assembly includes a first mounting seat 20 and a second mounting seat 30, and the driving assembly includes a first driving part 50 and a second driving part 60. The first mounting base 20 is movably disposed on the base 10, and the first driving portion 50 is connected to the first mounting base 20 and configured to drive the first mounting base 20 to reciprocate relative to the base 10 in the first direction X. The second mounting base 30 is movably disposed on the first mounting base 20, and the second driving portion 60 is connected to the second mounting base 30 and configured to drive the second mounting base 30 to reciprocate relative to the first mounting base 20 in the second direction Y. The first direction X and the second direction Y are two directions that form any included angle with each other in a plane in which the first diffusion sheet 40 is located. In the present embodiment, the first direction X, the second direction Y, and the light incident direction Z are perpendicular to each other. By providing two mounting seats (the first mounting seat 20 and the second mounting seat 30) and two driving portions (the first driving portion 50 and the second driving portion 60), the first diffusion sheet 40 can move in two directions at any included angle with each other in a plane where the first diffusion sheet 40 is located, and the coverage area of the first diffusion sheet 40 is increased.

In other embodiments, the mounting assembly may include only one mounting seat and one driving part to drive only the first diffusion sheet 40 to move in one direction (e.g., the first direction X or the second direction Y); or the number of the mounting seats and the number of the driving parts can be more than two, so that the first diffusion sheet 40 can be driven to move along a plurality of directions which form included angles with each other in the plane of the first diffusion sheet 40.

The base 10 supports the first mount 20, the second mount 30, the first diffusion sheet 40, the first driving part 50, the second driving part 60, and the second diffusion sheet 70. The base 10 includes a connecting portion 11, and the connecting portion 11 is used to connect a housing of the optical machine so as to assemble the diffusion sheet module 100 in the optical machine. The connecting portion 11 is provided with a buffer 111, and the buffer 111 is suitable for being clamped between the connecting portion 11 and the housing of the optical engine, so as to avoid rigid contact between the connecting portion 11 and the housing of the optical engine, and reduce noise generated by the reciprocating movement of the first mounting seat 20 and/or the second mounting seat 30. In this embodiment, the buffer pad 111 is constructed in a sleeve structure, the sleeve passes through the connection part 11 and protrudes to both sides of the connection part 11, and the installation is completed by inserting a fastener (e.g., a screw) into the housing of the optical engine through the sleeve, and the sleeve protruding to one side of the connection part 11 is in contact with the housing of the optical engine. The number of the connecting portions 11 can be set according to actual requirements, in this embodiment, the number of the connecting portions 11 is four, and four connecting portions 11 are located at or near four corner positions of the base 10.

The base 10 further includes a light-transmitting portion 101 (see fig. 3). The first diffusion sheet 40 and the second diffusion sheet 70 are both opposed to the light-transmitting portion 101 so that laser light can pass through the base 10 through the light-transmitting portion 101. In this embodiment, the light-transmitting portion 101 is a through hole, and the second diffusion sheet 70 is fixedly disposed in the through hole. By providing the through-hole and disposing the second diffusion sheet 70 in the through-hole, miniaturization of the diffusion sheet module 100 is facilitated. In other embodiments, the light-transmitting portion 101 may be made of a light-transmitting material, and the first diffusion sheet 40 and the second diffusion sheet 70 may be located at opposite sides of the light-transmitting portion 101.

In this embodiment, the first mounting seat 20 is movably disposed on the base 10 through the first elastic member 80, and the second mounting seat 30 is movably disposed on the first mounting seat 20 through the second elastic member 90. The first elastic member 80 connects the first mounting seat 20 and the base 10 and can be deformed in the first direction X so that the first mounting seat 20 can move in the first direction X relative to the base 10. The second elastic member 90 connects the first and second mounting seats 20 and 30 and can be deformed in the second direction Y so that the second mounting seat 30 can move in the second direction Y relative to the first mounting seat 20. The present disclosure is not limited to the first mount 20 being movably disposed to the base 10 by the first elastic member 80, and the second mount 30 being movably disposed to the first mount 20 by the second elastic member 90. For example, the first mounting seat 20 may be movably disposed on the base 10 by a slide rail, specifically, the slide rail extending along the first direction X may be disposed on the base 10, and then the first mounting seat 20 may be slidably disposed on the slide rail. The second mounting base 30 may be movably disposed on the first mounting base 20 through a slide rail, and specifically, the slide rail extending along the second direction Y may be disposed on the first mounting base 20, and then the second mounting base 30 is slidably disposed on the slide rail.

The first elastic member 80 is made of an elastic material, such as stainless steel or copper. In this embodiment, the first elastic member 80 is a spring. The first elastic member 80 includes a first body 81 and a first support 82. The first body 81 connects the first mount 20 and the base 10. The first body 81 defines a first opening 811 extending along the second direction Y. The first opening 811 includes a plurality of first edges 8111 connected in series. The first supporting portion 82 is disposed in the first opening 811 and extends along the second direction Y, and the first supporting portion 82 is connected to one of the first edges 8111 and spaced apart from the remaining first edges 8111, so as to ensure that only the first body 81 is deformed in the first direction X and the first supporting portion 82 is not deformed when the first driving portion 50 drives the first mounting base 20 to move in the first direction X relative to the base 10. The first body 81 can be elastically deformed in the first direction X, and plays a role in resetting and improving the stability of the first mounting base 20 moving in the first direction X. The first supporting portion 82 is connected to a side surface of the first mounting base 20, and has good rigidity in the light incident direction Z, so as to provide a good supporting function for the first mounting base 20 in the light incident direction Z, and prevent the first mounting base 20 from shaking in the light incident direction Z.

The first body 81 may be connected with the first mounting seat 20 and the base 10 by means of snap connection, gluing, etc. In this embodiment, the first body 81 is fixedly connected to the first mounting base 20 and the base 10 by dispensing. The diffusion sheet module 100 is fixed by dispensing, which is beneficial to miniaturization of the diffusion sheet module. Further, the two ends of the first body 81 are provided with first buckle structures 83, the first mounting seat 20 and the base 10 are both provided with second buckle structures 84, and the second buckle structures 84 are clamped with the first buckle structures 83. Through the buckle structure who sets up mutual block, played good positioning action, and be convenient for the installation of first elastic component 80. The first locking structure 83 may be one of a locking block and a locking groove which are mutually locked, and the second locking structure 84 may be the other of a locking block and a locking groove which are mutually locked; alternatively, the first and second latching structures 83 and 84 may be hooks that engage with each other. In this embodiment, the first locking structure 83 is a locking groove, and the second locking structure 84 is a locking block.

The first supporting portion 82 is connected to a side surface of the first mounting base 20 by dispensing. The first support portion 82 may be positioned on the first mounting base 20 before dispensing. Specifically, the first supporting portion 82 is provided with a first positioning hole 821, the first mounting seat 20 is provided with a first positioning block 21, and the first positioning block 21 is engaged with the first positioning hole 821. Through setting up first locating block 21 and the first locating hole 821 of mutually supporting, played good positioning effect, be convenient for the installation of first supporting part 82. In other embodiments, the first positioning hole 821 may be disposed on the first mounting seat 20, and the first positioning block 21 may be disposed on the first supporting portion 82.

The number of the first elastic members 80 is two, and two first elastic members 80 are located at opposite sides of the first mount 20 in the first direction X and slidably connect the first mount 20 to the base 10. Through setting up two first elastic component 80, can play good effect of restoring to the throne when first drive division 50 drive first mount pad 20 is at first direction X reciprocating motion, reduce the load of first drive division 50, and can improve first mount pad 20 reciprocating motion's stability on first direction X.

The second elastic member 90 is made of an elastic material, such as stainless steel or copper. In this embodiment, the second elastic member 90 is a spring. In some embodiments, the second elastic member 90 and the first elastic member 80 have different natural frequencies to avoid resonance. The second elastic member 90 includes a second body 91 and a second support portion 92. The second body 91 connects the second mounting seat 30 and the first mounting seat 20, and the second body 91 is provided with a second opening 911 extending along the first direction X. The second opening 911 includes a plurality of second edges 9111 connected in series. The second supporting portion 92 is disposed in the second opening 911 and extends along the first direction X, and the second supporting portion 92 is connected to one of the second edges 9111 and is disposed at a distance from the remaining second edges 9111, so as to ensure that only the second body 91 is deformed in the second direction Y and the second supporting portion 92 is not deformed when the second driving portion 60 drives the second mounting base 30 to move in the second direction Y relative to the first mounting base 20. The second body 91 can be elastically deformed in the second direction Y, and plays a role in resetting and improving the stability of the second mounting base 30 moving in the second direction Y. The second support portion 92 is connected to a side surface of the second mounting base 30, and has good rigidity in the light incident direction Z. The second supporting portion 92 plays a good role in supporting the second mounting base 30 in the light incident direction Z, and prevents the second mounting base 30 from shaking in the light incident direction Z.

The second body 91 may be connected to the second mount 30 and the first mount 20 by snap-fit connection, gluing, or the like. In this embodiment, the second body 91 is fixedly connected to the second mounting base 30 and the first mounting base 20 by dispensing. The diffusion sheet module 100 is fixed by dispensing, which is beneficial to miniaturization of the diffusion sheet module. Further, the two ends of the second body 91 are provided with third fastening structures 93, the second mounting seat 30 and the first mounting seat 20 are both provided with fourth fastening structures 94, and the third fastening structures 94 are fastened with the fourth fastening structures 93. Through the buckle structure who sets up mutual block, played good positioning action, and be convenient for second elastic component 90's installation. The third fastening structure 93 may be one of a fastening block and a fastening groove that are fastened to each other, and the fourth fastening structure 94 may be the other of the fastening block and the fastening groove that are fastened to each other; alternatively, the third and fourth fastening structures 93 and 94 may also be hooks that are fastened to each other. In this embodiment, the first locking structure 93 is a locking groove, and the second locking structure 94 is a locking block.

The second supporting portion 92 can be connected to the side surface of the second mounting base 30 by dispensing. Before dispensing, the second supporting portion 92 may be positioned on the second mounting seat 30. Specifically, the second supporting portion 92 is provided with a second positioning hole 921, the second mounting base 30 is provided with a second positioning block 31, and the second positioning block 31 is engaged with the second positioning hole 921. Through the arrangement of the second positioning block 31 and the second positioning hole 921 which are matched with each other, a good positioning effect is achieved, and the second supporting portion 92 is convenient to mount. In other embodiments, the second positioning hole 921 may be disposed on the second mounting seat 30, and the second positioning block 31 may be disposed on the second supporting portion 92.

The number of the second elastic members 90 is two, and two second elastic members 90 are located at two opposite sides of the second mounting base 30 in the second direction Y and slidably connect the second mounting base 30 to the first mounting base 30. Through setting up two second elastic component 90, can play good effect of resetting when second drive portion 60 drive second mount pad 30 is reciprocating motion in second direction Y, reduce the load of second drive portion 60, and can improve the stability of second mount pad 30 reciprocating motion in second direction Y.

In the present embodiment, the first and second mounting seats 20 and 30 are configured in a frame-shaped structure, the second mounting seat 30 is movably disposed in the first mounting seat 20 of the frame-shaped structure, and the first diffusion sheet 40 is fixedly disposed in the second mounting seat 30 of the frame-shaped structure. The second driving unit 60 drives the second mounting base 30 to reciprocate in the first mounting base 20 relative to the first mounting base 20 in the first direction X and the second direction Y. The second mounting seat 30 is spaced from the first mounting seat 20 in both the first direction X and the second direction Y; the spacing between the second mount 30 and the first mount 20 is configured to: it is sufficient to move the first mount 20 and the second mount 30 in the first direction X and the second direction Y without touching each other. The first mounting seat 20 and the second mounting seat 30 are configured into a frame structure, so that the size of the diffusion sheet module 100 in the light incidence direction Z can be reduced, and the miniaturization of the diffusion sheet module 100 is facilitated.

The first and second drive portions 50, 60 may be any suitable drive mechanism, such as a rack and pinion mechanism, a ball screw mechanism, a linear motor, or the like. In this embodiment, the first driving portion 50 includes a first magnet 51 and a first conductor 52 that are oppositely disposed, one of the first magnet 51 and the first conductor 52 is disposed on the first mounting base 20, and the other is disposed on the base 10; the second driving unit 60 includes a second magnet 61 and a second conductor 62 that are disposed opposite to each other, one of the second magnet 61 and the second conductor 62 is disposed on the second mounting base 30, and the other is disposed on the base 10.

Referring to fig. 4 and 5, for example, the first magnet 51 is fixedly disposed on the first mounting base 20, the N pole and the S pole of the first magnet 51 are arranged along the light incident direction Z, the first conductor 52 is fixedly disposed on the base 10 and opposite to the first magnet 51, and the first conductor 52 includes a first straight line segment 521 extending along the second direction Y; the second magnet 61 is fixedly disposed on the second mounting base 20, the N pole and the S pole of the second magnet 61 are arranged along the incident direction Z, the second conductor 62 is fixedly disposed on the base 10 and opposite to the second magnet 61, and the second conductor 62 includes a second straight line 621 extending along the first direction X. When the first conductor 52 is energized, the first straight line segment 521 receives an ampere force along the first direction X in the magnetic field generated by the first magnet 51, and the first magnet 51 can reciprocate along the first direction X under the reaction force, so as to drive the first mounting frame 20 to reciprocate along the first direction X. When the second conductor 62 is energized, the second straight segment 621 receives an ampere force along the second direction Y in the magnetic field generated by the second magnet 61, and the second magnet 61 can reciprocate along the second direction Y under a reaction force, thereby driving the second mounting bracket 30 to reciprocate along the second direction Y. The first and second driving portions 50 and 60 are provided in the form of magnets and conductors, and noise can be reduced as much as possible in addition to stable driving.

In some embodiments, the first magnet 51 includes a first unit magnet 511 and a second unit magnet 512 arranged in the first direction X, N poles and S poles of the first unit magnet 511 and the second unit magnet 512 are both arranged in the light incident direction Z, and magnetic poles of the first unit magnet 511 and the second unit magnet 512 are opposite in direction, the first conductor 52 is configured as a coil and includes two first straight line segments 521 having opposite current directions, the two first straight line segments 521 are respectively disposed opposite to the first unit magnet 511 and the second unit magnet 512; the second magnet 61 includes a third individual magnet 611 and a fourth individual magnet 612 arranged in the second direction Y, N poles and S poles of the third individual magnet 611 and the fourth individual magnet 612 are both arranged in the light incident direction Z, and magnetic pole directions of the third individual magnet 611 and the fourth individual magnet 612 are opposite, the second conductor 62 is configured as a coil and includes two second straight line segments 621 having opposite current directions, the two second straight line segments 621 being disposed opposite to the third individual magnet 611 and the fourth individual magnet 612, respectively.

Under the action of the first single magnet 511 and the second single magnet 512 with opposite magnetic pole directions, the two first straight line segments 521 with opposite current directions receive the ampere force along the first direction X and the same direction, and then the first single magnet 511 and the second single magnet 512 receive the reaction force along the first direction X and the same direction. Similarly, under the action of the third individual magnet 611 and the fourth individual magnet 612 with opposite magnetic pole directions, the two second straight segments 621 with opposite current directions receive an ampere force in the second direction Y and the same direction, and then the third individual magnet 611 and the fourth individual magnet 612 receive a reaction force in the second direction Y and the same direction. The first magnet 51 and the second magnet 61 each employ two single magnets having opposite magnetic poles to obtain a very high magnetic field utilization rate, and the first conductor 52 and the second conductor 62 are each configured as a coil so that the conductors can make full use of the magnetic fields generated by the two single magnets having opposite magnetic poles. In some embodiments, the size of the first single magnet 511 and the second single magnet 512 in the second direction Y may be equal to the length of the first straight line segment 521, so as to compress the circular arc segment of the first conductor 52 configured as a coil to the shortest, thereby improving the utilization rate of the first conductor 52; likewise, the size of the third individual magnet 611 and the fourth individual magnet 612 in the first direction X may be equal to the length of the second straight line segment 621, so as to compress the circular arc segment of the second conductor 62 configured as a coil to the shortest, thereby improving the utilization rate of the second conductor 62. For example, in some embodiments, the first conductor 52 and the second conductor 62 may each be racetrack shaped.

In some embodiments, the annular end surfaces of first conductor 52 and/or second conductor 62 configured as coils are affixed to base 10 to dissipate heat through base 10. The annular end surface of the coil may be directly attached to the base 10 without a gap between the annular end surface of the coil and the base. The annular end face of the coil can also be attached to the base 10 through heat-conducting glue, namely, the annular end face of the coil is indirectly attached to the base 10 through the heat-conducting glue, and a gap for accommodating the heat-conducting glue is formed between the annular end face of the coil and the base. The material of the base 10 may be aluminum or other material with better heat dissipation performance, so as to improve the heat dissipation efficiency. The base 10 may also be externally connected to a heat sink for heat dissipation by air cooling, water cooling, or the like.

In some embodiments, a first neutral layer 53 is disposed between the first and second unitary magnets 511, 512, and a second neutral layer 63 is disposed between the third and fourth unitary magnets 611, 612. The first neutral layer 53 is configured to: the first neutral layer 53 can make the first straight line segment 521 opposite to the first individual magnet 511 not to be opposite to the second individual magnet 512 and can make the first straight line segment 521 opposite to the second individual magnet 512 not to be opposite to the first individual magnet 511 during the first magnet 51 is reciprocated in the first direction X relative to the first conductor 52 configured as a coil. The sizes of the first neutral layer 53, the first individual magnet 511, and the second individual magnet 512 in the first direction X depend on the distance that the first mount 20 reciprocates in the first direction X. The second neutral layer 63 is configured to: the second neutral layer 63 can make the second straight line segment 621 opposing the third individual magnet 611 not to oppose the fourth individual magnet 612 and can make the second straight line segment 621 opposing the fourth individual magnet 612 not to oppose the third individual magnet 611 during the second magnet 61 is reciprocally moved in the second direction Y relative to the second conductor 62 configured as a coil. The sizes of the second neutral layer 63, the third individual magnet 611, and the fourth individual magnet 612 in the second direction Y depend on the distance that the second mount 20 reciprocates in the second direction Y.

Referring to fig. 2, the diffusion sheet module 100 further includes a controller (not shown), a first detecting element 110 and a second detecting element 120. The first sensing element 110 is used to sense movement information of the first mount 20, and the second sensing element 120 is used to sense movement information of the second mount 30. The first detecting element 110, the second detecting element 120, the first conductor 52 and the second conductor 62 are electrically connected to a controller, which is configured to adjust the current magnitude and direction of the first conductor 52 according to the motion information detected by the first detecting element 110 to adjust the motion state of the first mounting base 20, and to adjust the current magnitude and direction of the second conductor 62 according to the motion information detected by the second detecting element 120 to adjust the motion state of the second mounting base 30. In some embodiments, the first sensing element 10 and the second sensing element 120 may be configured as a Tunnel magnetoresistive sensor (TMR) and respectively disposed inside the first conductor 51 and the second conductor 52 configured as coils to detect the intensity of the magnetic field and feed back the detected intensity to the controller, and the controller may determine and control the motion condition of the first mount 20 and the second mount 30 according to the change of the intensity of the magnetic field. The present disclosure is not limited to a particular type of first sensing element 110 and second sensing element 120.

Referring to fig. 2, the diffuser module 100 further includes a circuit board 130 disposed on the base 10, and the first conductor 52 and the second conductor 62 are electrically connected to the circuit board 130. The first conductor 52, the second conductor 62 and the circuit board 130 may be located on the same surface of the base 10, and the present disclosure is not limited thereto.

Referring to fig. 1 to 3, the diffusion sheet module 100 further includes a first magnetic shielding sheet 140 and a second magnetic shielding sheet 150. The first magnetic shielding pieces 140 are positioned to correspond to the first magnet 51 for reducing the influence of external components on the first magnet 51. The second magnetic shielding pieces 150 are positioned to correspond to the second magnet 61 for reducing the influence of external components on the second magnet 51. In this embodiment, the first magnetic shielding piece 140 is located between the first magnet 51 and the second elastic member 90, and is used for preventing the first magnet 51 from generating an attraction force on the second elastic member 90; the second magnetic shielding piece 150 is located between the second magnet 61 and the first elastic member 80 for preventing the second magnet 61 from generating an attractive force to the first elastic member 80. Specifically, the first mounting seat 20 and the second mounting seat 30 are each configured as a frame structure, and the second mounting seat 30 is located in the first mounting seat 20; the first shielding plate 140 is fixedly arranged on the inner side surface of the first mounting seat 20, the first magnet 51 is fixedly arranged on the outer side surface of the first mounting seat 20, and the second elastic element 90 is positioned between the inner side surface of the first mounting seat 20 and the outer side surface of the second mounting seat 30; the second magnet 61 is fixedly disposed on the outer side surface of the second mounting seat 30, the second shielding plate 150 is fixedly disposed on the second magnet 61 and located between the second magnet 61 and the inner side surface of the first mounting seat 20, and the first elastic member 80 is located on the outer side surface of the first mounting seat 10.

Referring to fig. 6, an embodiment of the disclosure provides an optical machine 200, which includes a housing, and a light source assembly 210, a diffusion sheet module 100, a first light uniformizing device 220, a first shaping lens group 230, a second light uniformizing device 240, a second shaping lens group 250, a spatial light modulator 260, and a lens assembly 270 disposed in the housing. The diffusion sheet module 100 is connected to the housing through a connection portion, and the cushion is interposed between the connection portion and the housing to reduce noise. Portions of the lens assembly 270 are exposed from the housing.

The light source module 210 is for emitting first light including light beams of different colors. The diffusion sheet module 100 is located on the optical path of the first light, and is configured to diffuse the first light to emit a second light. The first light homogenizing device 220 is located on the optical path of the second light and is used for homogenizing the second light to emit third light, and the first light homogenizing device 220 may be a light homogenizing rod or a fly eye lens. The second diffusion sheet is located at one side of the diffusion sheet module 100 close to the light source assembly 210, and the first diffusion sheet is located at one side of the diffusion sheet module 100 close to the first light homogenizing device 220. The first shaping lens group 230 is located on the optical path of the third light, and is used for merging the light beams with different colors in the third light to the second dodging device 240 to form white fourth light. The second light unifying device 240 is configured to unify the fourth light to emit fifth light. The second shaping lens group 250 is located on an optical path between the second light unifying device 240 and the spatial light modulator 260, and is configured to guide the fifth light to the spatial light modulator 260 and guide the image light modulated by the spatial light modulator 260 to the lens assembly 270. The lens assembly 270 is located on an optical path of the image light, and projects the image light.

The light source assembly 210 includes a variety of lasers that can generate laser light of different colors, for example, the light source assembly 210 may include a blue laser for generating blue laser light, a red laser for generating red laser light, and a green laser for generating green laser light. The first light unifying device 220 may be a light unifying rod or a fly-eye lens. The first shaping lens group 230 includes two first lenses 231 disposed at intervals. The second light unifying device 240 is a fly-eye lens, and the length-width ratio of the unit lens of the fly-eye lens is the same as or close to the length-width ratio (the ratio between the long side and the short side) of the imaging area of the spatial light modulator 270. The second shaping lens group 250 includes two second lenses 251 and a polarizing device 252, the two second lenses 251 are used for guiding the fifth light emitted from the second light uniformizing device 240 to the polarizing device 252, and the polarizing device 252 is used for guiding the emitted light of the two second lenses 251 to the spatial light modulator 260 and guiding the image light modulated by the spatial light modulator 260 to the lens assembly 270. The polarizing device 252 may be a Polarization beam splitter (PCS), a Polarization Beam Splitter (PBS), a Polarization grating, or other optical elements that need to be glued to change the Polarization state of incident light. The spatial light modulator 260 may include a DMD (Digital Mirror Device) chip or an LCOS (Liquid crystal on Silicon) chip.

An embodiment of the present disclosure also provides a projector including the optical engine 200. It is understood that the projector further includes other components such as a main board, a heat dissipation element, and a sound device, and the disclosure is not necessarily detailed.

The above description is only an embodiment of the present disclosure, and not intended to limit the scope of the present disclosure, and all equivalent structures or equivalent processes performed by the present disclosure and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present disclosure.

Claims (13)

1. A diffusion sheet module, comprising:

a base;

a mounting assembly movably disposed on the base;

a first diffusion sheet disposed at the mounting assembly;

the driving assembly is connected with the mounting assembly and is used for driving the mounting assembly to drive the first diffusion sheet to reciprocate along at least one direction on the plane where the first diffusion sheet is located; and

and the second diffusion sheet is arranged on the base and is positioned at the light incident side of the first diffusion sheet.

2. The diffuser plate module of claim 1, wherein the mounting assembly comprises a first mounting base movably disposed on the base and a second mounting base movably disposed on the first mounting base, the driving assembly comprises a first driving portion and a second driving portion, the first driving portion is connected to the first mounting base and is configured to drive the first mounting base to reciprocate relative to the base in a first direction, the second driving portion is connected to the second mounting base and is configured to drive the second mounting base to reciprocate relative to the first mounting base in a second direction, and the first direction and the second direction are in a plane of and intersect with a plane of the first diffuser plate.

3. A diffuser plate module as set forth in claim 2 further comprising a first spring connecting said first mount to said base and deformable in said first direction to allow said first mount to move in said first direction relative to said base, and a second spring connecting said second mount to said first mount and deformable in said second direction to allow said second mount to move in said second direction relative to said first mount.

4. A diffuser plate module as set forth in claim 3, wherein the first and second mounting seats are each configured as a frame structure, the second mounting seat is movably disposed in the first mounting seat, the second elastic member is located between the second mounting seat and the first mounting seat, and the first diffuser plate is fixedly disposed in the second mounting seat.

5. The diffuser plate module of claim 3, wherein the first driving portion comprises a first magnet and a first conductor disposed opposite to each other, one of the first magnet and the first conductor being disposed on the base, and the other of the first magnet and the first conductor being disposed on the first mounting base; and/or the presence of a gas in the atmosphere,

the second driving part comprises a second magnet and a second conductor which are oppositely arranged, one of the second magnet and the second conductor is arranged on the base, and the other one of the second magnet and the second conductor is arranged on the second mounting seat.

6. The diffuser plate module of claim 5, further comprising a first magnetic shield sheet and a second magnetic shield sheet, the first magnetic shield sheet being positioned between the first magnet and the second spring, the second magnetic shield sheet being positioned between the second magnet and the first spring.

7. The diffuser plate module of claim 5 wherein the first conductor and/or the second conductor are coils, the annular end surfaces of the coils being affixed to the base.

8. The diffuser plate module of claim 2, further comprising a first detecting element for detecting motion information of the first mount and a second detecting element for detecting motion information of the second mount.

9. The diffuser plate module of claim 1, wherein the base comprises a connecting portion, a cushion is disposed on the connecting portion, the connecting portion is used for connecting a housing of an optical engine, and the cushion is configured to: when connecting portion connect during the casing of ray apparatus, the blotter can press from both sides and locate connecting portion with between the casing of ray apparatus.

10. The diffuser plate module of claim 1 wherein the base includes a through hole, the first diffuser plate is opposite the through hole, and the second diffuser plate is fixedly disposed in the through hole.

11. An optical machine comprises a light source assembly and a first light homogenizing device, and is characterized in that the optical machine further comprises a diffusion sheet module according to any one of claims 1-10, the diffusion sheet module is located on a light path between the light source assembly and the first light homogenizing device, the first diffusion sheet is located on one side, close to the first light homogenizing device, of the diffusion sheet module, and the second diffusion sheet is located on one side, close to the light source assembly, of the diffusion sheet module.

12. The optical bench of claim 11, further comprising a first shaping lens group, a second dodging device, a second shaping lens group, a spatial light modulator, and a lens assembly, wherein the light source assembly is configured to emit first light including light beams of different colors, the diffuser module is configured to scatter the first light to emit second light, the first dodging device is configured to dodge the second light to emit third light, the first shaping lens group is configured to merge light beams of different colors in the third light to the second dodging device to form white fourth light, the second dodging device is configured to dodge the fourth light to emit fifth light, the second shaping lens group is configured to guide the fifth light to the spatial light modulator and guide image light modulated by the spatial light modulator to the lens assembly, and the lens assembly is configured to project the image light.

13. A projector comprising the light engine of claim 11 or 12.

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