CN113641063B

CN113641063B - Dodging device, projector optical machine and projector

Info

Publication number: CN113641063B
Application number: CN202110937531.3A
Authority: CN
Inventors: 闫国枫; 徐旭升; 欧阳剑; 陈仁喆; 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: 2021-08-16
Filing date: 2021-08-16
Publication date: 2023-12-08
Anticipated expiration: 2041-08-16
Also published as: CN113641063A

Abstract

The present disclosure relates to a light homogenizing device, a projector light machine, and a projector, the light homogenizing device comprising a light source for emitting a light beam; the first light homogenizing component, the second light homogenizing component and at least one diffusion sheet component which are used for the light beam to penetrate are arranged along the light beam propagation direction; the first light homogenizing component is used for converting the light beam at the incident end of the first light homogenizing component into a plurality of light beams with respective optical axes and emitting the light beams from the emergent end of the first light homogenizing component; the second light homogenizing component is used for reflecting the light beam at the incident end for multiple times and emitting the light beam from the emergent end; the diffusion sheet assembly comprises a diffusion sheet and a driving part, wherein the diffusion sheet is used for the light beam to pass through, and the driving part is used for driving the diffusion sheet to move in the direction perpendicular to the light beam; and/or the diffusion sheet assembly comprises a diffusion sheet and a refraction piece, wherein the diffusion sheet is used for the light beam to pass through, and the refraction piece is arranged on the light inlet side of the diffusion sheet and used for refracting the light beam to different positions of the diffusion sheet. The light homogenizing device can effectively homogenize light beams and reduce color spots.

Description

Dodging device, projector optical machine and projector

Technical Field

The disclosure relates to the technical field of projection display, in particular to a light homogenizing device, a projector light machine and a projector.

Background

In the prior art, how to design a projector with simple structure, uniform color and good speckle dissipation effect is always a concern of manufacturers.

The current solutions are mainly implemented by using diffusion sheets and some dynamic optical elements, but the effect is not ideal or the volume and cost are not satisfactory, and furthermore, the dithering design of the projection screen is added, so that the experience of users is not utilized.

Some optical elements such as a conventional compound eye are used for integrating and homogenizing light, but the effect is not ideal, and the light beam cannot be well homogenized, so that the picture at the projection position still has color spots, and the high time and spatial coherence of the light beam cannot be reduced.

Disclosure of Invention

An object of the present disclosure is to provide a light homogenizing device, a projector light machine, and a projector, which can effectively homogenize a light beam, reduce high time and spatial coherence of the light beam, and reduce occurrence of color spots.

In order to achieve the above object, the present disclosure provides a dodging device, including:

a light source for emitting a light beam;

the first light homogenizing component, the second light homogenizing component and at least one diffusion sheet component which are used for the light beam to penetrate are arranged along the light beam propagation direction;

The first light homogenizing component is used for converting a light beam at an incidence end of the first light homogenizing component into a plurality of light beams with respective optical axes and emitting the light beams from an emission end of the first light homogenizing component so as to perform area light homogenizing on the light beams;

the second light homogenizing component is used for reflecting the light beam at the incidence end for multiple times and then emitting the light beam from the emission end so as to perform angle light homogenizing on the light beam;

the diffusion sheet assembly comprises a diffusion sheet and a driving part, wherein the diffusion sheet is used for being penetrated by a light beam, and the driving part is used for driving the diffusion sheet to move in a direction perpendicular to the light beam; and/or the number of the groups of groups,

the diffusion sheet assembly comprises a diffusion sheet and a refraction piece, wherein the diffusion sheet is used for allowing a light beam to pass through, and the refraction piece is arranged on the light inlet side of the diffusion sheet and used for refracting the light beam to different positions of the diffusion sheet.

Optionally, the light homogenizing device further includes a first lens group, the first light homogenizing component includes a first light homogenizing element, the second light homogenizing component includes a third light homogenizing element, and in the light beam propagation direction, the first light homogenizing element, the first lens group and the third light homogenizing element are sequentially arranged, and the first lens group is used for imaging a light beam at an exit end of the first light homogenizing element to an incident end of the second light homogenizing element;

Preferably, the light homogenizing device further includes a second lens group, the first light homogenizing component further includes a second light homogenizing element, in the light beam propagation direction, the third light homogenizing element, the second lens group and the second light homogenizing element are sequentially disposed, and the second lens group is used for imaging the light beam at the exit end of the third light homogenizing element to the incident end of the second light homogenizing element.

Optionally, the second light homogenizing component further includes a fourth light homogenizing element, where the fourth light homogenizing element is disposed between the first light homogenizing element and the first lens group, and the first lens group is configured to image a light beam at an exit end of the fourth light homogenizing element to an incident end of the third light homogenizing element;

preferably, the light homogenizing device further comprises a collimating lens group for collimating the light beam, and the collimating lens group is arranged between the first lens group and the fourth light homogenizing element;

preferably, the first light homogenizing element comprises a light homogenizing lens group, the fourth light homogenizing element comprises a light rod group, the light homogenizing lens group comprises a plurality of light homogenizing micro lenses, the light rod group comprises a plurality of sub light rods, the collimating lens group comprises a plurality of collimating micro lenses, the light homogenizing micro lenses are respectively arranged on the light inlet sides of the sub light rods in a one-to-one correspondence manner, and the collimating micro lenses are respectively arranged on the light outlet sides of the sub light rods in a one-to-one correspondence manner.

Optionally, the light source includes a plurality of light emitting units, the first light homogenizing element adjacent to the light source includes a plurality of light homogenizing units, and the plurality of light emitting units and the plurality of light homogenizing units are respectively arranged in a one-to-one correspondence manner; or,

the light source comprises a first light emitting part and a second light emitting part, the first light emitting part comprises a plurality of first light emitting units, the second light emitting part comprises a plurality of second light emitting units, the first light homogenizing element adjacent to the light source comprises a plurality of first light homogenizing units and second light homogenizing units, the first light emitting units and the first light homogenizing units are arranged in one-to-one correspondence respectively, and the second light emitting units and the second light homogenizing units are arranged in one-to-one correspondence respectively.

Preferably, the first light homogenizing element is configured as a fly-eye lens group, the plurality of first light homogenizing units are configured as a plurality of first fly-eye units, the plurality of second light homogenizing units are configured as a plurality of second fly-eye units, the plurality of first light emitting units are arranged in one-to-one correspondence with the plurality of first fly-eye units, and the plurality of second light emitting units are arranged in one-to-one correspondence with the plurality of second fly-eye units.

Preferably, the first light homogenizing component comprises at least one light homogenizing diffusion sheet.

Preferably, the first lens group comprises an image-side telecentric lens group.

Optionally, the diffusion sheet assembly further includes a first moving layer, a base, a first elastic member, and a second elastic member, and the driving part includes a first driving part and a second driving part;

the first elastic member connects the diffusion sheet and the first moving layer, and the first elastic member is configured to: deformable in a first direction parallel to the diffusion sheet to enable movement of the diffusion sheet in the first direction relative to the first moving layer;

the second elastic member connects the first moving layer and the base, and the second elastic member is configured to: deformable in a second direction parallel to the diffusion sheet to enable the first moving layer and the diffusion sheet to move in the second direction relative to the base;

the first driving part is used for driving the diffusion sheet to move along the first direction relative to the first moving layer, the second driving part is used for driving the first moving layer and the diffusion sheet to move along the second direction relative to the base, and the first direction and the second direction are intersected.

Optionally, the diffusion sheet assembly further includes a second moving layer, the first moving layer is configured as a frame structure, the diffusion sheet is disposed on the second moving layer, the first elastic member connects the frame structure with the second moving layer and supports the second moving layer in a beam penetrating direction, the second moving layer and the frame structure are disposed at intervals in the first direction, and the second elastic member is configured to support the first moving layer in the beam penetrating direction and connect the first moving layer with the base, so that the first moving layer and the base are disposed at intervals in the beam penetrating direction;

the first driving part is used for driving the second moving layer to reciprocate in the first direction relative to the frame structure, and the second driving part is used for driving the first moving layer and the second moving layer to reciprocate in the second direction relative to the base.

Optionally, the frame structure includes a first frame plate, a second frame plate, a third frame plate, and a fourth frame plate that are sequentially connected end to end, where the first frame plate and the third frame plate are disposed opposite to each other along the first direction, and the second frame plate and the fourth frame plate are disposed opposite to each other along the second direction; the second moving layer comprises two first outer side surfaces which are arranged opposite to each other along the first direction, and the two first outer side surfaces are respectively arranged at intervals with the first frame plate and the third frame plate along the first direction;

The first elastic piece comprises two first reeds which are oppositely arranged along the first direction, wherein one first reed is connected with one of the first outer side surface and one of the second frame plate and the fourth frame plate, and the other first reed is connected with the other first outer side surface and one of the second frame plate and the fourth frame plate; the second elastic piece comprises two second reeds which are oppositely arranged along the second direction, wherein one second reed is connected with the outer side face of the second frame plate and the base, and the other second reed is connected with the outer side face of the fourth frame plate and the base;

preferably, the first reed includes a first reed body and a first supporting piece, both extending along the second direction, a first strip opening extending along the second direction and having two closed ends is formed on the first reed body, the first strip opening includes two first inner edges oppositely disposed along the second direction and two second inner edges oppositely disposed along the beam penetrating direction, the first supporting piece is disposed in the first strip opening, one end of the first supporting piece is connected to one of the first inner edges, the other end of the first supporting piece is spaced from the other first inner edge along the second direction, the first supporting piece and the two second inner edges are spaced from each other along the beam penetrating direction, the first reed body is used for being connected with the second frame plate or the fourth frame plate, and the first supporting piece is used for being connected with the first outer side;

And/or, the second reed comprises a second reed body and a second supporting piece, wherein the second reed body extends along the first direction, a second strip opening which extends along the first direction and is closed at two ends is formed in the second reed body, the second strip opening comprises two third inner edges which are oppositely arranged along the first direction and two fourth inner edges which are oppositely arranged along the beam penetrating direction, the second supporting piece is arranged in the second strip opening, one end of the second supporting piece is connected with one of the third inner edges, the other end of the second supporting piece and the other third inner edge are arranged at intervals along the first direction, the second supporting piece and the two fourth inner edges are all arranged at intervals along the beam penetrating direction, the second reed body is used for being connected with the base, and the second supporting piece is used for being connected with the outer side surface of the second frame plate or the outer side surface of the fourth frame plate.

Optionally, the diffusion sheet assembly further includes a mounting base and a third driving part disposed on the mounting base, the refraction element includes a glass plate, the glass plate is swingably disposed on the mounting base along a beam propagation direction, and the third driving part is used for driving the glass plate to swing along the beam propagation direction.

The disclosure also provides a projector optical machine, which comprises the light homogenizing device.

The present disclosure additionally provides a projector including the projector light engine.

In the technical scheme, the first light homogenizing component converts the light beam at the incident end of the first light homogenizing component into a plurality of light beams with respective optical axes and emits the light beams from the emergent end of the first light homogenizing component, and each light beam with an independent optical axis can realize one-time light homogenizing process so as to realize area light homogenizing of the light beam; the second light homogenizing component reflects the light beams at the incident end for multiple times and emits the light beams from the emergent end, the light beams emitted from the second light homogenizing component comprise a plurality of different angle areas, and each angle area comprises the light beams within the range of the angle area in all the light beams at different positions at the inlet end of the second light homogenizing component, so that the angle light homogenizing of the light beams is realized. Therefore, in the present disclosure, the light beam emitted by the light source can achieve at least one area light homogenizing and one angle light homogenizing, so that the effect of at least two light homogenizing products is achieved on the surface and angle, and more incoherent light is added together on the basis of improving the homogenizing effect, so as to achieve a good effect of resolving spots.

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

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

fig. 1 is a schematic structural view of a dodging device according to a first embodiment of the present disclosure;

fig. 2 is a schematic view of a first light homogenizing element of a light homogenizing apparatus according to a first embodiment of the present disclosure;

fig. 3 is a schematic view of a light spot distribution at an incident end of a third light homogenizing element of the light homogenizing apparatus according to the first embodiment of the present disclosure;

fig. 4 is a far-field distribution schematic diagram of an outgoing beam of a third light homogenizing element of the light homogenizing apparatus according to the first embodiment of the present disclosure;

fig. 5 is a schematic view of a light spot distribution on an imaging element of a dodging device in accordance with a first embodiment of the present disclosure;

fig. 6 is a schematic structural view of a dodging device according to a second embodiment of the present disclosure;

fig. 7 is a schematic structural view of a light homogenizing device according to a third embodiment of the present disclosure;

fig. 8 is a schematic view of a light bar set of a light evening device according to a third embodiment of the present disclosure;

FIG. 9 is a far field distribution schematic of an outgoing beam of each sub-rod of the light homogenizing apparatus according to the third embodiment of the present disclosure;

fig. 10 is a schematic view of a light spot distribution at an incident end of a third light homogenizing element of a light homogenizing apparatus according to a third embodiment of the present disclosure;

fig. 11 is a far-field distribution schematic diagram of an outgoing beam of a third light homogenizing element of a light homogenizing apparatus according to a third embodiment of the present disclosure;

FIG. 12 is a schematic view of a light spot distribution on an imaging element of a dodging device in accordance with a third embodiment of the present disclosure;

fig. 13 is a schematic structural view of a light uniforming device according to a fourth embodiment of the present disclosure, in which a first light uniforming element is configured as a diffuser;

fig. 14 is a schematic structural view of a light evening device according to a fifth embodiment of the present disclosure, in which a light source includes a first light emitting portion and a second light emitting portion;

FIG. 15 is an exploded view of a diffuser assembly of a light homogenizing device according to one embodiment of the present disclosure;

FIG. 16 is a schematic perspective view of a diffuser assembly of a light homogenizing device according to one embodiment of the present disclosure;

FIG. 17 is a top view of a diffuser assembly of a light homogenizing device of an embodiment of the present disclosure;

FIG. 18 is a side view of a diffuser assembly of a light homogenizing device of an embodiment of the present disclosure;

FIG. 19 is a schematic view of a diffuser assembly of a light homogenizing device according to an embodiment of the present disclosure, taken along a second direction;

FIG. 20 is an exploded schematic view of a diffuser plate assembly of an alternative embodiment of a light homogenizing device of the present disclosure, wherein first and second guide support posts are also illustrated;

fig. 21 is a schematic view of a diffuser of a light homogenizing device of another embodiment of the present disclosure.

Description of the reference numerals

1. First light-emitting part of light source 11

12. The second light-emitting part 2 is a first light-homogenizing component

2a first light homogenizing element 2b second light homogenizing element

21. Second light homogenizing element of light homogenizing microlens 3

3a third light homogenizing element 3b fourth light homogenizing element

31. Sub-optical wand 4 first lens group

5. Second lens group 6 collimating lens group

61. A collimating microlens 7 third lens group

8 PBS prism 9 imaging element

100. Lens 20 fourth lens group

10. Diffusion sheet assembly 101 diffusion sheet

103. First movable layer 1030 second clamping block

1031. First frame plate 1032 second frame plate

1033. Third frame plate 1034 fourth frame plate

1035. Third clamping block 104 base

1040. Fourth clamping block 1041 base frame

10411. Base frame side plate of base frame body 10412

1042. Second opening of base floor 10420

1043. Flexible circuit board

105. First inner edge of first elastic member 10501

10502. Second inner edge 1051 first leaf spring

10510. First clamping groove 10511 first reed body

10512. First clamping block of first supporting piece 10513

10514. First deforming arm

106. Second spring 1061 second leaf

10610. Second clamping groove 10611 second reed body

10612. Second deformation arm of second support piece 10613

107. A first driving part

1071. First driving magnet 10711 first single magnet

10712. Second monolithic magnet 10713 first neutral layer

1072. First straight line segment of first energizing conductor 10720

108. Second driving magnet of second driving part 1081

10811. Third single magnet 10812 fourth single magnet

10813. Second neutral layer 1082 second electrical conductor

10820. Second straightway 109 second moving layer

1091. First outer side 110 second detection element

111. First guide support 1110 first guide support column

112. Second guide support post 1120 second guide support post

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, arrows used in the respective views indicate light beams emitted from the light source, and azimuth words such as "front and rear" used refer to front and rear in the propagation direction of the light beams, and may be specifically described with reference to fig. 1; the terms such as "first" and "second" are used merely to distinguish one element from another element and do not have order or importance.

As shown in fig. 1 to 21, the present disclosure provides a light uniformizing device including: a light source 1 for emitting a light beam; along the propagation direction of the light beam, a first light homogenizing component 2, a second light homogenizing component 3 and at least one diffusion sheet component 10 are arranged for the light beam to penetrate; the first dodging component 2 is used for converting a light beam at an incident end of the first dodging component into a plurality of light beams with respective optical axes and emitting the light beams from an emergent end of the first dodging component so as to carry out area dodging on the light beams; the second dodging component 3 is used for carrying out multiple reflections on the light beam at the incidence end and then emitting the light beam from the emission end so as to carry out angle dodging on the light beam; the diffusion sheet assembly 10 includes a diffusion sheet 101 and a driving part, wherein the diffusion sheet 101 is used for passing through a light beam, and the driving part is used for driving the diffusion sheet 101 to move in a direction perpendicular to the light beam; and/or the diffuser assembly 10 includes a diffuser 101 for passing the light beam therethrough and a refractive element 102, the refractive element 102 being disposed on the light entrance side of the diffuser 101 for refracting the light beam to different positions of the diffuser 101.

The front-rear arrangement positions of the first light homogenizing component 2 and the second light homogenizing component 3 are not limited, and the first light homogenizing component 2 may be disposed on the light incident side of the second light homogenizing component 3, or the second light homogenizing component 3 may be disposed on the light incident side of the first light homogenizing component 2; the present disclosure is not limited in this regard.

In the case of the diffusion sheet assembly 10, the diffusion sheet assembly 10 may be provided in one or more positions, and the positions are not limited, and may be provided between the light source 1 and the light equalizing element, or may be provided between the light equalizing elements, which is not limited in the present disclosure.

In the above technical solution, the first light homogenizing component 2 converts the light beam at the incident end into a plurality of light beams with respective optical axes and emits the light beams from the emergent end, and each light beam with an independent optical axis can realize one-time light homogenizing process, so as to realize area light homogenizing of the light beam; the second light homogenizing component 3 reflects the light beam at the incident end for multiple times and emits the light beam from the emergent end, the light beam emitted from the second light homogenizing component 3 comprises a plurality of different angle areas, and each angle area comprises the light beams in the range of the angle area in all the light beams at different positions at the inlet end of the second light homogenizing component 3, so that the angle light homogenizing of the light beams is realized. The diffusion sheet assembly 10 can also continuously homogenize the light beam, so as to achieve the homogenization in the time dimension.

Therefore, in the present disclosure, the light beam emitted by the light source 1 can achieve at least one area light homogenizing, one angle light homogenizing, and at least one time dimension light homogenizing, so that more incoherent light is added together on the basis of improving the homogenizing effect from the effect of the product of the area light homogenizing, the angle light homogenizing, and the time dimension light homogenizing, and a good effect of resolving spots is achieved.

In the above description of the technical effects, "the light beam emitted from the second light homogenizing element 3 includes a plurality of different angle areas, and each angle area includes light rays within the range of the angle area among all the light beams at different positions at the inlet end of the second light homogenizing element 3" can be understood with reference to the following embodiments:

for example, there are 10 light beams with respective optical axes at the incident end of the second light homogenizing component 3, each light beam has an angle ranging from-10 degrees to 10 degrees, and the light beam emitted from the emergent end of the second light homogenizing component 3 has an angle ranging from-10 degrees to 10 degrees and includes four angle areas, which are: (1) -between-10 degrees and-5 degrees; (2) -between 5 and 0 degrees; (3) between 0 degrees and 5 degrees; (4) between 5 degrees and 10 degrees. In the (1) th angle region, included is a collection of rays between-10 degrees and-5 degrees in each beam, and the rays in the angle region are formed into a shaped spot.

In one embodiment, referring to fig. 1, the light homogenizing device further includes a first lens group 4, the first light homogenizing component 2 includes a first light homogenizing element 2a, the second light homogenizing component 3 includes a third light homogenizing element 3a, and the first light homogenizing element 2a, the first lens group 4 and the third light homogenizing element 3a are sequentially disposed in a light beam propagation direction, and the first lens group 4 is used for imaging a light beam at an exit end of the first light homogenizing element 2a to an incident end of the third light homogenizing element 3 a.

In this embodiment, by providing the first lens group 4 between the first light equalizing element 2a and the third light equalizing element 3a to image the light beam at the exit end of the first light equalizing element 2a to the entrance end of the third light equalizing element 3a, the light beam emitted from the exit end of the first light equalizing element 2a is prevented from being emitted out of order, and the utilization ratio of the light beam emitted from the exit end of the first light equalizing element 2a is improved.

Alternatively, the above-described first lens group 4 is configured as an image-side telecentric optical path lens group capable of imaging all the light fluxes at the exit end of the first dodging element 2a to the entrance end of the third dodging element 3 a.

Further, the following relationship may be satisfied in the process of the light beam emitted from the first dodging element 2a being irradiated to the third dodging element 3 a:

N1*S1*sin^2(Θ1)＝A*NA^2

S1 is the average light emitting area of each beam emitted by the first dodging element 2 a; Θ1 is the average value of the divergence angles of the light beams of each independent optical axis of the first light homogenizing element 2 a; the number of optical axes is defined as N1; a is the entrance area of the third light homogenizing element 3 a; NA is the numerical aperture at which the third light equalizing element 3a receives light.

Alternatively, the light source 1 includes a plurality of light emitting units, the first light uniformizing element 2a adjacent to the light source 1 includes a plurality of light uniformizing units, and the plurality of light emitting units and the plurality of light uniformizing units are respectively disposed in one-to-one correspondence.

For example, the light source 1 may be configured as a laser module, the plurality of light emitting units are configured as a plurality of chips of the laser module, the first light homogenizing element 2 is configured as a double-sided fly-eye lens, the plurality of light homogenizing units are configured as a plurality of fly-eye units of the double-sided fly-eye lens, and the plurality of chips and the plurality of fly-eye units are respectively arranged in one-to-one correspondence, so that area light homogenizing of the light beam emitted by the light source is realized.

In other embodiments, the light source 1 may include only one light emitting unit that emits one light beam, and the first light uniformizing element 2 adjacent to the light source 1 includes a plurality of light uniformizing units that convert the one light beam into a plurality of beamlets having respective optical axes. For example, the light beam emitted from the light emitting unit has a cross section of 10 square millimeters, the number of light homogenizing units is 10, and each light homogenizing unit may be 1 square millimeter, thereby dividing one light beam into 10 beamlets having respective optical axes.

Referring to fig. 1 to 5, a light source 1 is configured as a laser module having 24 chips, where red, green and blue laser light is irradiated perpendicularly along an optical axis into a first light homogenizing element 2a (double-sided fly eye lens) having 24 fly eye units, and the laser light irradiates all 24 fly eye units to form 24 divergent laser beams of optical axes, each beam being transmitted along the optical axis. Each compound eye element of the compound eye lens is of hexagonal cross-section, and therefore the divergent profile of each beam is hexagonal. After the 24 telecentric beam groups emitted by the fly-eye lens pass through the first lens group 4 configured as an image space telecentric lens group, an inverted image is formed at the entrance of the third light homogenizing element 3a configured as a light rod, and the image plane can be shown with reference to fig. 3. Each of the 24 light beams has an independent hexagonal divergence angle, and is emitted independently through the light rod, the number of reflections of the light beam in the light rod, that is, the number of homogenization of the light rod, is defined as N2, N2= (l×na)/(v a), where L is the length of the light rod, NA is the numerical aperture of the light rod that receives light, and a is the area of the light rod entrance. The number of homogenizing times of the light beam in the light bar determines the number of angle areas of the light bar emergent far field, for example, the number of homogenizing times is 14 through calculation, the light bar emergent far field has 14 areas, each area corresponds to 24 light beams of all the angle areas in the light bar transmission, the divergence angles of the 24 light beams are hexagonal, and therefore, the far field light spot distribution profile of the light emitted by the light bar is also hexagonal, as shown in fig. 4.

In other embodiments, the first lens group 4 may also be an object-image double telecentric lens group.

Referring to fig. 1, the polarization state of light emitted from the light rod can pass through the PBS prism 8, and after passing through a light path formed by the third lens group 7 and the PBS prism 8, an image with the shape of the light rod outlet is formed on the imaging element 9 configured as an LCOS imaging chip, specifically referring to fig. 5, the image includes 24 space regions of compound eyes and a light spot (the number of times of light homogenization is 24×14) formed by completely integrating and homogenizing the 14 angle regions of the light rod, so that the full integration and homogenization of space and angle are obtained, the brightness uniformity is greatly improved, the incoherence is greatly reduced, and the effect of dispersing the light spot is achieved. The LCOS imaging chip modulates the light beam into an image, and the image is reflected back to the original light path after the polarization state is changed by 90 degrees, and the light is reflected by the PBS prism 8, such as inside the lens 100, and the lens 100 projects the light out of the image with a certain magnification of 20 degrees.

In other embodiments, instead of the PBS prism and LCOS imaging chip 9 of this embodiment, a DMD chip (not shown) and a TIR prism (not shown) may be provided in the optical path.

In one embodiment, referring to fig. 13, the first light homogenizing element 2a includes a light homogenizing diffusion sheet. The light homogenizing diffusion sheet can be regarded as a new area light source, and can also diffuse laser into divergent beams with a plurality of optical axes.

In one embodiment, referring to fig. 6, the light homogenizing device further includes a second lens group 5, the first light homogenizing component 2 further includes a second light homogenizing element 2b, and in the light beam propagation direction, the third light homogenizing element 3a, the second lens group 5 and the second light homogenizing element 2b are sequentially disposed, and the second lens group 5 is configured to image the light beam at the exit end of the third light homogenizing element 3a to the incident end of the second light homogenizing element 2 b.

That is, in this embodiment, the light uniformizing device includes the first light uniformizing element 2a, the second light uniformizing element 2b, and one third light uniformizing element 3a, realizing two-time area light uniformizing and one-time angle light uniformizing, further improving the effect of beam uniformizing, and improving the effect of resolving spots.

For example, referring to fig. 6, the light source 1 configured as a laser module emits a concentric ring group of light spots after two-stage integration of the first fly-eye lens group and the light rod, and the light spots are imaged into a circular light spot to the second fly-eye lens group by the second lens group 5, and the second fly-eye lens group divides the light spot into a plurality of sub-beams, each sub-beam comprises a front two-stage integrated uniform light spot, and each sub-beam is imaged to the surface of the whole LCOS imaging chip by the fourth lens group 20, so that when the LCOS imaging chip surface, a plurality of sub-beams generated by all the second fly-eye lens groups are superimposed, and each sub-beam is the result of two-stage integrated light uniformization of the previous stage, thereby realizing three-stage integrated light uniformization design.

Referring to fig. 7, the second light homogenizing component 3 further includes a fourth light homogenizing element 3b, the fourth light homogenizing element 3b is disposed between the first light homogenizing element 2a and the first lens group 4, and the first lens group 4 is configured to image a light beam at an exit end of the fourth light homogenizing element 3b to an incident end of the third light homogenizing element 3 a.

That is, in this embodiment, the light uniformizing device includes the first light uniformizing element 2a, the third light uniformizing element 3a, and the fourth light uniformizing element 3b, and realizes the two-time angle light uniformizing and the one-time area light uniformizing, further improves the light beam uniformizing effect, and improves the speckle eliminating effect

Optionally, referring to fig. 7, the light uniformizing device further includes a collimating lens group 6 for collimating the light beam, and the collimating lens group 6 is disposed between the first lens group 4 and the fourth light uniformizing element 3b, and by disposing the collimating lens group 6, the collimation of the light beam is achieved, and the quality of light beam propagation is improved.

Alternatively, referring to fig. 7, the first light homogenizing element 2a includes a light homogenizing lens group, the fourth light homogenizing element 3b includes a light rod group including a plurality of light homogenizing microlenses 21, the light rod group includes a plurality of sub light rods 31, the collimating lens group 6 includes a plurality of collimating microlenses 61, the plurality of light homogenizing microlenses 21 are respectively disposed on the light incident sides of the plurality of sub light rods 31 in a one-to-one correspondence, and the plurality of collimating microlenses 61 are respectively disposed on the light emergent sides of the plurality of sub light rods 31 in a one-to-one correspondence.

The plurality of light-homogenizing microlenses 21 effectively space-homogenize the plurality of light beams, the plurality of sub-light rods 31 effectively angle-homogenize the plurality of light beams, and the plurality of collimating microlenses 61 collimate the plurality of light beams, thereby improving the quality of light beam propagation. However, the present disclosure is not limited to the specific form of the first light equalizing element 2a, the fourth light equalizing element 3b, and the collimator lens group 6.

For example, referring to fig. 7 to 12, the light source 1 is configured as a trichromatic laser module including fourteen laser chips, emits fourteen laser beams including red, green and blue, and irradiates all the laser beams to a dodging lens group including 14 dodging microlenses 21, each dodging microlens 21 spatially corresponds to one laser beam, each laser beam is converged and incident on a light bar group including 14 sub-light bars 31 after passing through the corresponding dodging microlens 21. Each of the light beams is irradiated into the corresponding sub-light bar 31, and the light bar group is as shown in fig. 8, and the far-field spot distribution of the light beam emitted from each sub-light bar 31 is as shown in fig. 9, and the light beam is divided into 10 angular regions according to the number of reflections in the sub-light bar 31. The divergent light beam emitted from each sub-light rod 31 is collimated by the subsequent collimating lens group 6 and then imaged by the light emitting surface of the first lens group 4 to the entrance of the third light homogenizing element 3a configured as a light rod. The light spot distribution at the entrance of the light bar is shown in fig. 10, the light spot is determined by the shape of the light spot of 14 collimating micro lenses 61, and each small light spot is a uniform light spot overlapped by 10 angle areas.

Fourteen light beams all contain independent angle distribution and are transmitted in the light bar, the emergent light spots after multiple reflection are shown in fig. 11, and the reflection times of the light bar determine that the light-emitting far-field light spots of the light bar contain twenty-two subareas. Each sub-region contains a superposition of 10 angular ranges of the 14 beams in the front-end light bar array. The light beam emitted from the light rod is imaged on the upper surface of the imaging element 9 by the third lens 7. The image distribution is shown in fig. 12, and is determined by 14 light rod group light spots in space, the angle is the superposition of the light spots in the 10 angle areas formed by the repeated reflection of the front end light rod group and the 22 angle areas formed by the repeated reflection of the rear end light rod, and the light beam intensity on the surface of the DMD chip is very uniform through the superposition of 14 space light beams and the superposition of the angles of 10 and 22 respectively, and the light spots of each incoherent laser beam are superimposed together to play the role of dispersing the light spots. The DMD imaging chip modulates light energy into an image and projects the image through the lens 100.

Referring to fig. 14, the light source 1 may include a first light emitting part 11 and a second light emitting part 12, the first light emitting part 11 includes a plurality of first light emitting units, the second light emitting part 12 includes a plurality of second light emitting units, the first light homogenizing element 2a adjacent to the light source 1 includes a plurality of first light homogenizing units and second light homogenizing units, the plurality of first light emitting units are disposed in one-to-one correspondence with the plurality of first light homogenizing units, and the plurality of second light emitting units are disposed in one-to-one correspondence with the plurality of second light homogenizing units.

For example, in one embodiment, the first light emitting portion 11 includes a laser module having a plurality of light emitting chips, the second light emitting portion 12 includes an LED module having a plurality of LED light emitting units, and the first light equalizing element 2 adjacent to the light source 1 includes a fly eye lens group having a plurality of first fly eye units and a plurality of second fly eye units, the plurality of light emitting chips and the plurality of first fly eye units being disposed in one-to-one correspondence, respectively, and the plurality of LED light emitting units and the plurality of second fly eye units being disposed in one-to-one correspondence, respectively.

That is, the light source 1 may be constituted by a plurality of light emitting portions, and may emit a laser beam, or may be an LED beam or a fluorescent beam processed by the linear polarization modulation element 50 and the reflection mirror 60, or may be any combination of two or three. The light beams may be superimposed between different wavelengths, and the light beams may be superimposed on the same wavelength, but irradiated to different positions of the first light equalizing element 2a spatially.

Referring to fig. 15 to 20, the diffusion sheet assembly 10h further includes a first moving layer 103, a base 104, a first elastic member 105, a second elastic member 106, and a driving part including a first driving part 107 and a second driving part 108; the first elastic member 105 connects the diffusion sheet 101 and the first moving layer 103, and the first elastic member 105 is configured to: is deformable in a first direction a parallel to the diffusion sheet 101 to enable the diffusion sheet 101 to move in the first direction a with respect to the first moving layer 103; the second elastic member 106 connects the first moving layer 103 and the base 104, and the second elastic member 106 is configured to: being deformable in a second direction B parallel to the diffusion sheet 101 to enable the first moving layer 103 and the diffusion sheet 101 to move in the second direction B relative to the base 104; the first driving part 107 is used for driving the diffusion sheet 101 to move along a first direction a relative to the first moving layer 103, and the second driving part 108 is used for driving the first moving layer 103 and the diffusion sheet 101 to move along a second direction B relative to the base 104, and the first direction a and the second direction B intersect.

In the above technical solution, the first elastic member 105 can be deformed along the first direction a parallel to the diffusion sheet 10, the second elastic member 106 can be deformed along the second direction B parallel to the diffusion sheet 101, and the first elastic member 105 and the second elastic member 106 can play a role in resetting, and on the other hand, can improve the stability of movement of the diffusion sheet 101. The principle of dynamic speckle dispersion is superposition of a plurality of independent speckle patterns in unit time, so that a better speckle dispersion effect can be obtained by increasing the random phase number of the diffusion sheet 101 in unit time, and compared with the traditional rotary diffusion sheet, the movable diffusion sheet 101 fully utilizes different phase divergence angles of all positions on the diffusion sheet 101, can better weaken the coherence of light beams, and can provide a better speckle dispersion effect under the same size. In the process of driving the diffusion sheet 101 to move along the first direction a and the second direction B through the first driving part 107 and the second driving part 108 respectively, the number of random phases is also increased, the area utilization rate of the diffusion sheet 101 is improved, the coherence of light beams is better weakened, and the speckle dissipation effect is improved.

Referring to fig. 15 and 16, the diffusion sheet assembly further includes a second moving layer 109, the first moving layer 103 is configured as a frame structure, the diffusion sheet 101 is disposed on the second moving layer 109 for the light beam to pass through, the first elastic member 105 connects the frame structure and the second moving layer 109 and supports the second moving layer 109 in the light beam passing direction, the second moving layer 109 and the frame structure are disposed at intervals in the first direction a, and the second elastic member 106 is configured to support the first moving layer 103 in the light beam passing direction and connect to the base 104, so that the first moving layer 103 and the base 104 are disposed at intervals in the light beam passing direction; the first driving part 107 is used for driving the second moving layer 109 to reciprocate in the first direction a in the frame structure and relative to the frame structure, and the second driving part 108 is used for driving the first moving layer 103 and the second moving layer 109 to reciprocate in the second direction B relative to the base 104.

In this embodiment, first, the first moving layer 103 is provided as a frame structure, and the second moving layer 109 for providing the diffusion sheet 101 is provided reciprocally movably in the frame structure along the first direction a, greatly reducing the design in the thickness direction of the diffusion sheet assembly (i.e., the light beam penetrating direction), and improving the compactness of the structural design; besides the above-mentioned restoring and moving stability improving effects, the first elastic member 105 and the second elastic member 106 can also support and connect the second moving layer 109 in the frame structure, the second elastic member 106 can also support and connect the first moving layer 103 on the base 104, that is, the first elastic member 105 and the second elastic member 106 can respectively support the second moving layer 109 and the first moving layer 103, so as to avoid the situation that the second moving layer 109 reciprocates relative to the first moving layer 103 along the first direction a and the first moving layer 103 oscillates relative to the base 104 along the second direction B in the process of reciprocating movement of the second moving layer 109 and the first moving layer 103 in the beam penetrating direction, thereby improving the reciprocating movement stability, and simplifying the structural design and facilitating the light weight and light weight design of the diffusion sheet assembly.

In one embodiment, referring to fig. 15 and 16, the frame structure of the diffusion sheet assembly includes a first frame plate 1031, a second frame plate 1032, a third frame plate 1033, and a fourth frame plate 1034 connected in order and end to end, the first frame plate 1031 and the third frame plate 1033 being disposed opposite each other in a first direction a, and the second frame plate 1032 and the fourth frame plate 1034 being disposed opposite each other in a second direction B; the second moving layer 109 includes two first outer side surfaces 1091 disposed opposite to each other in the first direction a, and the two first outer side surfaces 1091 are disposed at intervals from the first frame plate 1031 and the third frame plate 1033, respectively, in the first direction a.

The first resilient member 105 includes two first flaps 1051 disposed opposite each other in the first direction a and each extending in the second direction B, one of the first flaps 1051 connecting one of the first outer side surfaces 1091 with one of the second and fourth frame plates 1032, 1034, the other first flap 1051 connecting the other first outer side surface 1091 with one of the second and fourth frame plates 1032, 1034; second spring 106 includes two second leaves 1061 disposed opposite each other in second direction B, one of second leaves 1061 connecting an outer side of second frame plate 1032 with base 104, and the other second leaf 1061 connecting an outer side of fourth frame plate 1034 with base 104.

In this embodiment, first, the first movable layer 103 is provided in a square frame structure, effectively improving the stability of the first movable layer 103 structure; secondly, the first elastic members 105 are provided as two first reeds 1051, and each first reed 1051 connects the corresponding first outer side 1091 with one of the second frame plate 1032 and the fourth frame plate 1034, when the second moving layer 109 reciprocates in the square frame structure along the first direction a, the two first reeds 1051 can play a good resetting role, the load of the first driving portion 107 is reduced, and the two first reeds 1051 can improve the stability of the second moving layer 109 reciprocating in the first direction a; in addition, the two first reeds 1051 are disposed opposite to the first outer side 1091 of the second moving layer 109, so that the size of the diffusion sheet assembly in the first direction a is reduced, and the size of the diffusion sheet assembly in the thickness direction can be reduced, which is beneficial to the design of thinning the diffusion sheet assembly. Likewise, the second spring 106 is provided as two second leaves 1061, one of said second leaves 1061 connecting the outer side of the second frame plate 1032 with the base 104, the other second leaf 1061 connecting the outer side of the fourth frame 1034 with said base 104. When the first moving layer 103 reciprocates relative to the base in the second direction B, the two second reeds 1061 can play a good resetting role, reduce the load of the second driving portion 108, and the two second reeds 1061 can improve the stability of the reciprocating movement of the first moving layer 103 in the second direction B; in addition, the two second reeds 1061 are respectively disposed opposite to the outer side surface of the second frame plate 1032 and the outer side surface of the fourth frame 1034, so that the size of the diffusion sheet assembly in the second direction B is reduced, and the thickness of the diffusion sheet assembly can be reduced, which is beneficial to the design of the diffusion sheet assembly with light and thin thickness.

Referring to fig. 15 and 18, the first reed 1051 includes a first reed body 10511 and a first support sheet 10512 each extending along the second direction B, a first elongated opening extending along the second direction B and having both ends closed is formed in the first reed body 10511, the first elongated opening includes two first inner edges 10501 disposed opposite to each other along the second direction B, and two second inner edges 10502 disposed opposite to each other along the beam passing direction, the first support sheet 10512 is disposed in the first elongated opening and one end of the first support sheet 10512 is connected to one of the first inner edges 10501, the other end of the first support sheet 10512 is disposed at an interval from the other first inner edge 10501 along the second direction B, and the first support sheet 10512 is disposed at an interval from the two second inner edges 10502 along the beam passing direction, the first reed body 10511 is configured to be connected to the second frame plate 1032 or the fourth frame plate 1034, and the first support sheet 1051 is configured to be connected to the first outer side 1091.

And/or, the second reed 1061 includes a second reed body 10611 extending along the first direction a and a second supporting piece 10612, a second elongated opening extending along the first direction a and having two closed ends is formed on the second reed body 10611, the second elongated opening includes two third inner edges 10601 disposed opposite to each other along the first direction a and two fourth inner edges 10602 disposed opposite to each other along the beam passing direction, the second supporting piece 10612 is disposed in the second elongated opening, one end of the second supporting piece 10612 is connected to one of the third inner edges 10601, the other end of the second supporting piece 10612 is disposed at intervals along the first direction a with the other third inner edge 10601, the second supporting piece 10612 and the two fourth inner edges 10602 are disposed at intervals along the beam passing direction, the second reed body 10611 is connected to the base 104, and the second supporting piece 10612 is connected to the outer side or the outer side.

In this embodiment, the first reed 1051 comprises two parts, one part being the first reed body 10511 and the other part being the first support sheet 10512. First, for the first support sheet 10512, the first support sheet 10512 extends along the second direction B and has a long shape, so that the first support sheet 10512 has good rigidity in the beam passing direction, and by relatively and tightly connecting the first support sheet 10512 with the first outer side 1091, the second movable layer 109 can be supported in a good manner in the beam passing direction, so that the second movable layer 109 is prevented from shaking in the beam passing direction; next, in addition to the function of connecting the first moving layer 103, the first reed body 10511 has an important function of being capable of elastically deforming along the first direction a, specifically, during the process of reciprocating the second moving layer 109 along the first direction a, the two first deforming arms 10514 of the first reed body 10511 adjacent to the first supporting sheet 10512 are capable of deforming along the first direction a, so as to play a role of resetting and improving the reciprocating stability of the second moving layer 109.

And/or second leaf 1061 also includes two portions, one portion being second leaf body 10611 and the other portion being second support tab 10612. First, for the second supporting piece 10612, the second supporting piece 10612 extends along the first direction a and has a long shape, so that the second supporting piece 10612 has good rigidity in the beam passing direction, and by relatively attaching the second supporting piece 10612 to the outer side surface of the second frame plate 1032 or the outer side surface of the fourth frame plate 1034, the first moving layer 103 can be supported on the base 104 stably in the beam passing direction, so that the first moving layer 103 is prevented from shaking in the beam passing direction; next, in addition to the function of connecting the first moving layer 103 and the base 104, the second reed body 10611 has an important function of being capable of elastically deforming along the second direction B, specifically, during the process of reciprocating the first moving layer 103 along the first direction B, the two second deforming arms 10613 of the second reed body 10611 adjacent to the second supporting piece 10612 are capable of deforming along the second direction B, so as to play a role of resetting and improving the reciprocating stability of the first moving layer 103.

It should be noted that, the first supporting piece 10512 and the two second inner edges 10502 are disposed at intervals along the beam penetrating direction, so that the first supporting piece 10512 cannot interfere with the two first deforming arms 10514 in a structure in the process of reciprocating the second moving layer 109 along the first direction a, so that the first deforming arms 10514 can deform normally; similarly, the second supporting piece 10612 and the two fourth inner edges 10602 are disposed at intervals along the beam passing direction, so that the second supporting piece 10612 does not interfere with the two second deforming arms 10613 in the structure during the reciprocating movement of the first moving layer 103 along the second direction B, thereby ensuring that the second deforming arms 10613 can deform normally.

Referring to fig. 15, 16 and 17, two first clamping grooves 10510 are formed at two ends of the first reed body 10511, the first outer side 1091 includes a first portion and a second portion, the first portion is relatively attached to and connected with the first supporting piece 10512, the second portion is provided with a first clamping block 10513, the inner side of the second frame plate 1032 or the inner side of the fourth frame plate 1034 is provided with a second clamping block 1030, and the two first clamping grooves 10510 are respectively clamped with the first clamping block 10513 and the second clamping block 1030; two second clamping grooves 10610 are formed at two ends of the second reed body 10611, the outer side face and the outer side face respectively comprise a third portion and a fourth portion, the third portion is relatively attached to the second supporting piece 10612, a third clamping block 1035 is arranged on the fourth portion, a fourth clamping block 1040 is arranged on the base 104, and the two second clamping grooves 10610 are respectively clamped with the third clamping block 1035 and the fourth clamping block 1040. Through setting up above-mentioned fixture block and draw-in groove structure of mutually supporting, played good locate action, the convenience of reed installation is convenient for improve.

Referring to fig. 15 and 16, the base 104 includes a base frame 1041 and a base bottom plate 1042, and the base bottom plate 1042 is disposed in the base frame 1041 in a plugging manner; the second moving layer 109 has a first opening 1092 formed thereon, the diffusion sheet 101 is plugged in the first opening 1092, the base bottom plate 1042 has a second opening 10420 formed thereon, and the second opening 10420 is disposed opposite to the first opening 1092 along the beam passing direction.

In this embodiment, the base 104 is configured as two parts of the base frame 1041 and the base bottom plate 1042, and the base bottom plate 1042 is disposed in the base frame 1041 in a plugging manner; the stability of the structure of the base 104 can be effectively improved, and the diffusion sheet assembly is well supported; secondly, the first opening 1092 for installing the diffusion sheet 101 is formed on the second moving layer 109, so that the weight of the second moving layer 109 is reduced, and the design of thinning and thinning of the diffusion sheet assembly is facilitated; in addition, a second opening 10420 opposite to the first opening 1092 is formed in the base plate 1042, so that the light beam can pass through the diffuser assembly without stopping the light beam.

Specifically, referring to fig. 15, the base frame 1041 includes a base frame body 10411 and a base frame side plate 10412 that are connected to each other, the first moving layer 103 and the base frame body 10411 are disposed at intervals in a beam penetrating direction, the base bottom plate 1042 is disposed in the base frame body 10411 in a blocking manner, the base frame side plate 10412 extends along the second direction B and protrudes out of the base frame body 10411 in the beam penetrating direction, and a fourth clamping block 1040 is disposed at an end of the base frame side plate 10412 along the second direction B to be clamped with a corresponding second clamping groove 10610 on a corresponding second reed body 10611. That is, by providing the base frame 1041 with such an L-shaped structure, in addition to the function of connecting the first movable layer 103 and facilitating the connection of the second reed 1061, a light and thin design of the diffusion sheet assembly can be utilized for the design in which the first movable layer 103 is substantially flush with the base frame side plate 10412.

Referring to fig. 15 and 19, the first driving unit 107 includes a first driving magnet 1071 and a first conductive conductor 1072 that are disposed opposite to each other, one of the first driving magnet 1071 and the first conductive conductor 1072 is disposed on the second moving layer 109, and the other is disposed on the base 104; and/or, the second driving part 108 includes a second driving magnet 1081 and a second conductive body 1082 disposed opposite to each other, one of the second driving magnet 1081 and the second conductive body 1082 is disposed on the first moving layer 103, and the other is disposed on the base 104.

For example, the first driving magnet 1071 is disposed on the second moving layer 109, and the N pole and S pole of the first driving magnet 1071 are disposed along the beam penetrating direction, the first current-carrying conductor 1072 is disposed on the base 104 and is disposed opposite to the first driving magnet 1071, and the first straight line segment 10720 of the first current-carrying conductor 1072 extends along the second direction B; and/or, the second driving portion 108 includes a second driving magnet 1081 and a second through-conductor 1082, where the second driving magnet 1081 is disposed on the first moving layer 103 and an N pole and an S pole of the second driving magnet 1081 are disposed along the beam passing direction, the second through-conductor 1082 is disposed on the base 104 and opposite to the second driving magnet 1081, and a second straight line segment 10820 of the second through-conductor 1082 extends along the first direction a.

In this embodiment, it is understood that the first straight line 10720 of the first current-carrying conductor 1072 extending in the second direction B is located in the magnetic field generated by the first driving magnet 1071 having the N-pole and S-pole arranged in the beam passing direction, and the first driving magnet 1071 receives the ampere force in the first direction a according to the left hand rule, and the first driving magnet 1071 receives the reaction force opposite to the first straight line 10720, and the second moving layer 109 can reciprocate in the first direction a because the first driving magnet 1071 is provided on the second moving layer 109. Similarly, the left hand rule can also be used to infer: the second driving part 108 configured as the second driving magnet 1081 and the second power transmission conductor 1082 can drive the first moving layer 103 to reciprocate in the second direction B.

By providing the first drive portion 107 and the second drive portion 108 in the form of drive magnets and energized conductors, noise decibels can be reduced as much as possible in addition to drive stability, improving the user experience of the diffuser assembly in specific product applications.

Alternatively, referring to fig. 15 and 16, the base 104 includes a base frame 1041 and a base bottom plate 1042, the base bottom plate 1042 being disposed in the base frame 1041 in a plugging manner; the second moving layer 109 is formed with a first opening 1092, the diffusion sheet 101 is plugged in the first opening 1092, the base bottom plate 1042 is formed with a second opening 10420, and the second opening 10420 is opposite to the first opening 1092 along the beam penetrating direction; the first and second current conductors 1072 and 1082 are disposed on the inner surface of the base plate 1042, the second moving layer 109 has a first mounting groove 1070 for mounting the first driving magnet 1071 thereon, and the first moving layer 103 has a second mounting groove 1080 for mounting the second driving magnet 1081 thereon.

In this embodiment, by providing both the first and second current-carrying conductors 1072 and 1082 on the inner surface of the base bottom plate 1042, not only the arrangement space can be effectively utilized and the compactness of the structural arrangement can be improved, but also the arrangement of the size in the beam passing direction can be reduced, facilitating the design of the light and thin diffusion sheet assembly; the first mounting groove 1070 and the second mounting groove 1080 for mounting the first driving magnet 1071 and the second driving magnet 1081 are formed in the second moving layer 109 and the first moving layer 103, respectively, so that the convenience in mounting the first driving magnet 1071 and the second driving magnet 1081 is improved, and the diffusion sheet assembly is designed to be lightweight.

Referring to fig. 15, the diffusion sheet assembly further includes a flexible circuit board 1043 laid on an inner surface of the base bottom plate 1042, and the first and second electrical conductors 1072 and 1082 are connected to the flexible circuit board 1043. In this embodiment, the current-carrying conductor can be formed by winding the existing electrical connection wire on the flexible circuit board 1043, so that the height of the diffusion sheet assembly in the thickness direction is not occupied, the current-carrying conductor is directly arranged on the flexible circuit board 1043 to become a part of the flexible circuit board 1043, and the conventional coil assembly processes of winding, welding, dispensing and fixing can be omitted, so that the convenience of operation is improved.

In other embodiments, referring to fig. 15, 16 and 19, the diffusion sheet assembly further includes a controller, a first detecting element for detecting first movement information of the second moving layer 109, and a second detecting element 110 for detecting second movement information of the first moving layer 103, and the first detecting element, the second detecting element 110, the first energizing conductor 1072 and the second energizing conductor 1082 are all electrically connected to the controller; the controller is configured to control operation of the first powered conductor 1072 based on first motion information detected by the first detecting element and to control operation of the second powered conductor 1082 based on second motion information detected by the second detecting element 110.

In this embodiment, by providing the first detection element for detecting the first movement information of the second moving layer 109 and the second detection element 110 for detecting the second movement information of the first moving layer 103, the movement states of the second moving layer 109 and the first moving layer 103, that is, the movement states of the diffusion sheet 101 in the first direction a and the second direction B can be monitored in real time; on this basis, by providing the controller electrically connected to the detection element and the current-carrying conductor, when the detection element detects that the movement state of the first moving layer 103 and/or the second moving layer 109 is abnormal and the movement state of the first moving layer 103 and/or the second moving layer 109 needs to be adjusted, the controller adjusts the current magnitude and direction of the second current-carrying conductor 1082 corresponding to the first moving layer 103 and/or adjusts the current magnitude and direction of the first current-carrying conductor 1072 corresponding to the second moving layer 6, thereby adjusting the magnitude and direction of the force applied to the first moving layer 103 and/or the second moving layer 109, and further adjusting the movement state of the first moving layer 103 and the second moving layer 109, that is, adjusting the movement state of the diffusion sheet 101 in the first direction a and the second direction B is realized.

Alternatively, each of the first and second detecting elements 110 may be configured as a tunnel magneto-resistance sensor (TMR, tunnel Magneto Resistance), the conductive body is configured as a ring-shaped copper coil, the tunnel magneto-resistance sensor is disposed inside the ring-shaped copper coil to detect the intensity of the magnetic field and feed back to the controller, and the controller can determine and control the movement conditions of the first moving layer 103 and the second moving layer 109 according to the intensity change of the magnetic field. The present disclosure is not limited to the specific type of first and second sensing elements 110.

Alternatively, referring to fig. 15 and 19, the first driving magnet 1071 includes a first unit magnet 10711 and a second unit magnet 10712 sequentially arranged in the first direction a, N and S poles of the first unit magnet 10711 and the second unit magnet 10712 are each arranged in the beam passing direction, and the magnetic pole directions of the first unit magnet 10711 and the second unit magnet 10712 are opposite; the first energizing conductor 1072 is configured as a first energizing coil including two first straight line segments 10720 extending in the second direction B and arranged at intervals in the first direction a with opposite current directions, the two first straight line segments 10720 being arranged to oppose the first single magnet 10711 and the second single magnet 10712, respectively; the second driving magnet 1081 includes a third single magnet 10811 and a fourth single magnet 10812 sequentially arranged along the second direction B, N and S poles of the third single magnet 10811 and the fourth single magnet 10812 are all arranged along the beam passing direction, and magnetic pole directions of the third single magnet 10811 and the fourth single magnet 10812 are opposite; the second electrical communication conductor 1082 is configured as a second electrical coil that includes two second straight line segments 10820 extending in the first direction a and arranged at intervals in the second direction B and having opposite current directions, and the two second straight line segments 10820 are respectively arranged to oppose the third single magnet 10811 and the fourth single magnet 10812.

In this embodiment, under the action of the first single magnet 10711 and the second single magnet 10712, the two first straight line segments 10720 of the first energizing coil are both subjected to ampere force, and the directions of the ampere force applied to the two first straight line segments 10820 are both extended along the first direction a and are in the same direction, correspondingly, the first single magnet 10711 and the second single magnet 10712 are both subjected to ampere force extending along the first direction a and in the same direction, and because the first driving magnet 107 is disposed on the second moving layer 109, the second moving layer 109 is subjected to ampere force extending along the first direction a, and the second moving layer 109 drives the diffusion sheet 101 thereon to reciprocate along the first direction a.

Similarly, under the action of the third single magnet 10811 and the fourth single magnet 10812, the two second straight-line segments 10820 of the second energizing coil are both subjected to ampere force, and the directions of the ampere force received by the two second straight-line segments 10820 are both along the second direction B and are the same, correspondingly, the third single magnet 10811 and the fourth single magnet 10812 are both subjected to ampere force along the second direction B and are the same, and because the second driving magnet 108 is disposed on the first moving layer 103, the first moving layer 103 is subjected to ampere force along the first direction B, and the first moving layer 103 drives the second moving layer 109 and the diffusion sheet 101 to reciprocate along the second direction a.

The first electrified coil can fully utilize the magnetic fields generated by the first single magnet 10711 and the second single magnet 10712 at two sides of the thickness direction, the design of the first driving magnet 1071 adopts two single magnets with opposite polarities to obtain extremely high magnetic field utilization rate, the first electrified coil can adopt a racetrack design, the dimensions of the first single magnet 10711 and the second single magnet 10712 in the second direction B can be equal to the length of the first straight line segment 10720 so as to compress the ineffective arc segment of the first electrified coil to the shortest, the utilization rate of the first electrified coil is improved, and the designs of the first driving magnet 1071 and the first electrified coil can also compress the design of the diffusion sheet assembly in the thickness direction as much as possible, so that the diffusion sheet assembly is convenient for the light and thin design.

Similarly, the second through-hole coil can fully utilize the magnetic fields generated by the third single magnet 10811 and the fourth single magnet 10812 at two sides of the thickness direction, the second driving magnet 1081 can obtain extremely high magnetic field utilization rate by adopting two single magnets with opposite polarities, the second through-hole coil can be designed in a track shape, the dimensions of the third single magnet 10811 and the fourth single magnet 10812 in the first direction A can be equal to the length of the second straight line segment 10820 so as to compress the ineffective arc segment of the second through-hole coil to the shortest, the utilization rate of the second through-hole coil is improved, and the first driving magnet 1081 and the second through-hole coil can also be compressed in the thickness direction of the diffusion sheet assembly as much as possible, so that the diffusion sheet assembly is light and thin.

Referring to fig. 15 and 19, the first drive magnet 1071 further includes a first neutral layer 10713 disposed between the first and second individual magnets 10711 and 10712, and the second drive magnet 1081 further includes a second neutral layer 10813 disposed between the third and fourth individual magnets 10811 and 10812;

the first neutral layer 10713 is configured to: during the reciprocal movement of the first driving magnet 1071 in the first direction a relative to the first energized coil, the first neutral layer 10713 is capable of making the first straight line segment 10720 opposite to the first single magnet 10711 not opposite to the second single magnet 10712 and making the first straight line segment 10720 opposite to the second single magnet 10712 not opposite to the first single magnet 10711; the second neutral layer 10813 is configured to: during the reciprocal movement of the second drive magnet 1081 with respect to the second powered coil in the second direction B, the second neutral layer 10813 is capable of causing the second straight segment 10820, which is opposite the third single magnet 10811, not to be opposite the fourth single magnet 10812, and of causing the second straight segment 10820, which is opposite the fourth single magnet 10812, not to be opposite the third single magnet 10811.

By providing the first neutral layer 10713 between the first single magnet 10711 and the second single magnet 10712, in the process that the first driving magnet 1071 reciprocates along the first direction a relative to the first energizing coil, the first neutral layer 10713 can prevent the first straight line segment 10720 opposite to the first single magnet 10711 from being opposite to the second single magnet 10712, prevent the first straight line segment 10720 opposite to the second single magnet 10712 from being opposite to the first single magnet 10711, avoid the generation of resistance opposite to the movement direction of the second moving layer 109, and improve the smoothness of the second moving layer 109 reciprocating in the first direction a.

Similarly, by providing the second neutral layer 10813 between the third single magnet 10811 and the fourth single magnet 10812, the second neutral layer 10813 can prevent the second linear segment 10820 facing the third single magnet 10811 from facing the fourth single magnet 10812 and prevent the second linear segment 10820 facing the fourth single magnet 10812 from facing the third single magnet 10811 during the reciprocating movement of the second driving magnet 1071 in the second direction B with respect to the second power-on coil, thereby preventing the generation of a resistance force in the opposite direction to the movement of the first moving layer 103 and improving the smoothness of the reciprocating movement of the first moving layer 103 in the second direction B.

Referring to fig. 20, the diffusion sheet assembly further includes a second moving layer 109, a first guide support 111 and a second guide support 112, the first moving layer 103 is constructed as a frame structure, the diffusion sheet 101 is disposed on the second moving layer 109, the first guide support 111 is disposed on the frame structure and supports the second moving layer 109 in the frame structure along the beam passing direction, the first elastic member 105 connects the second moving layer 109 and the first moving layer 103, and the second moving layer 109 is disposed at a distance from the frame structure in the first direction a; the second guide support 112 is disposed on the base 104 and supports the first moving layer 103 on the base 104 along the beam passing direction, and the second elastic member 106 connects the base 104 and the first moving layer 103.

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

Referring to fig. 20, the first guide support 111 includes two first guide support columns 1110 disposed on the first moving layer 103 at intervals along the beam passing direction, and both the first guide support columns 1110 extend along the second direction B, and the second moving layer 109 is disposed between the two first guide support columns 1110 movably along the first direction a; and/or, the second guiding support 112 includes two second guiding support columns 1120 disposed on the base 104 at intervals along the beam penetrating direction, and the two second guiding support columns 1120 extend along the first direction a, and the first moving layer 103 is movably disposed between the two second guiding support columns 1120 along the second direction B. The first and second guide support columns 1110 and 1120 are simple in structure, can function as good guide support, and facilitate lightweight design of the diffusion sheet assembly. However, the present disclosure is not limited to the specific structural forms of the first guide support 111 and the second guide support 112.

Referring to fig. 21 (in which arrows indicate light beams), the diffusion sheet assembly 10 further includes a mounting base (not shown) and a third driving part (not shown) provided on the mounting base, the refraction member 102 includes a glass plate swingably provided on the mounting base in a light beam traveling direction, and the third driving part is for driving the glass plate to swing in the light beam traveling direction, and by continuously swinging the glass plate, a beam of light is irradiated to different positions on the diffusion sheet 101 after being refracted by the glass plate, thereby realizing a dodging and speckle dissipating effect in a time dimension. Alternatively, the glass plate 102 described above may be configured as a flat glass, a wedge glass, or the like, which is not limited by the present disclosure.

The disclosure further provides a projector optical machine, which comprises the light homogenizing device.

The present disclosure additionally provides a projector including the projector light engine described above.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A light homogenizing device, characterized in that the light homogenizing device comprises:

a light source (1) for emitting a light beam;

along the propagation direction of the light beam, a first light homogenizing component (2), a second light homogenizing component (3) and at least one diffusion sheet component (10) which are penetrated by the light beam are arranged;

the first light homogenizing component (2) is used for converting a light beam at the incident end of the first light homogenizing component into a plurality of light beams with respective optical axes and emitting the light beams from the emergent end of the first light homogenizing component so as to perform area light homogenizing on the light beams;

the second light homogenizing component (3) is used for reflecting the light beam at the incidence end for multiple times and then emitting the light beam from the emission end so as to perform angle light homogenizing on the light beam;

the diffusion sheet assembly (10) comprises a diffusion sheet (101) and a driving part, wherein the diffusion sheet (101) is used for being penetrated by a light beam, and the driving part is used for driving the diffusion sheet (101) to move in a direction perpendicular to the light beam; and/or the number of the groups of groups,

The diffusion sheet assembly (10) comprises a diffusion sheet (101) for passing a light beam and a refraction piece (102), wherein the refraction piece (102) is arranged on the light inlet side of the diffusion sheet (101) and used for refracting the light beam to different positions of the diffusion sheet (101);

the light homogenizing device further comprises a first lens group (4), the first light homogenizing component (2) comprises a first light homogenizing element (2 a), the second light homogenizing component (3) comprises a third light homogenizing element (3 a), the first light homogenizing element (2 a), the first lens group (4) and the third light homogenizing element (3 a) are sequentially arranged in the light beam propagation direction, and the first lens group (4) is used for imaging a light beam at the emergent end of the first light homogenizing element (2 a) to the incident end of the third light homogenizing element (3 a);

the first lens group (4) comprises an image-side telecentric lens group.

2. The light homogenizing device according to claim 1, further comprising a second lens group (5), wherein the first light homogenizing component (2) further comprises a second light homogenizing element (2 b), wherein the third light homogenizing element (3 a), the second lens group (5) and the second light homogenizing element (2 b) are arranged in sequence in the light beam propagation direction, and wherein the second lens group (5) is configured to image the light beam at the exit end of the third light homogenizing element (3 a) to the incident end of the second light homogenizing element (2 b).

3. The light homogenizing device according to claim 1, wherein the second light homogenizing component (3) further comprises a fourth light homogenizing element (3 b), the fourth light homogenizing element (3 b) being arranged between the first light homogenizing element (2 a) and the first lens group (4), the first lens group (4) being arranged to image a light beam at an exit end of the fourth light homogenizing element (3 b) to an entrance end of the third light homogenizing element (3 a).

4. A light homogenizing device according to claim 3, characterized in that the light homogenizing device further comprises a collimator lens group (6) for collimating the light beam, and that the collimator lens group (6) is arranged between the first lens group (4) and the fourth light homogenizing element (3 b).

5. The light homogenizing device according to claim 4, wherein the first light homogenizing element (2 a) comprises a light homogenizing lens group, the fourth light homogenizing element (3 b) comprises a light rod group, the light rod group comprises a plurality of light homogenizing microlenses (21), the light rod group comprises a plurality of sub light rods (31), the collimating lens group (6) comprises a plurality of collimating microlenses (61), the plurality of light homogenizing microlenses (21) are respectively arranged on the light incident sides of the plurality of sub light rods (31) in a one-to-one correspondence manner, and the plurality of collimating microlenses (61) are respectively arranged on the light emergent sides of the plurality of sub light rods (31) in a one-to-one correspondence manner.

6. The light-homogenizing device according to any one of claims 1-5, wherein the light source (1) comprises a plurality of light-emitting units, the first light-homogenizing element (2 a) adjacent to the light source (1) comprises a plurality of light-homogenizing units, and the plurality of light-emitting units and the plurality of light-homogenizing units are respectively arranged in a one-to-one correspondence; or,

the light source (1) comprises a first light emitting part (11) and a second light emitting part (12), the first light emitting part (11) comprises a plurality of first light emitting units, the second light emitting part (12) comprises a plurality of second light emitting units, the first light homogenizing element (2 a) adjacent to the light source (1) comprises a plurality of first light homogenizing units and a plurality of second light homogenizing units, the first light emitting units and the first light homogenizing units are respectively arranged in a one-to-one correspondence manner, and the second light emitting units and the second light homogenizing units are respectively arranged in a one-to-one correspondence manner.

7. The light homogenizing device according to claim 6, wherein the first light homogenizing element (2 a) is configured as a fly's eye lens group, the plurality of first light homogenizing units are configured as a plurality of first fly's eye units, the plurality of second light homogenizing units are configured as a plurality of second fly's eye units, the plurality of first light emitting units are arranged in one-to-one correspondence with the plurality of first fly's eye units, and the plurality of second light emitting units are arranged in one-to-one correspondence with the plurality of second fly's eye units.

8. A light homogenizing device according to claim 6, wherein the first light homogenizing component (2) comprises at least one light homogenizing diffusion sheet.

9. The light homogenizing device according to claim 1, wherein the diffuser assembly (10) further comprises a first moving layer (103), a base (104), a first elastic member (105) and a second elastic member (106), the diffuser assembly further comprising a first driving portion (107) and a second driving portion (108);

the first elastic member (105) connects the diffusion sheet (101) and the first moving layer (103), and the first elastic member (105) is configured to: is deformable along a first direction (a) parallel to the diffusion sheet (101) to enable the diffusion sheet (101) to move along the first direction (a) with respect to the first moving layer (103);

the second elastic member (106) connects the first moving layer (103) and the base (104), and the second elastic member (106) is configured to: is deformable along a second direction (B) parallel to the diffusion sheet (101) so as to enable the first moving layer (103) and the diffusion sheet (101) to move along the second direction (B) with respect to the base (104);

the first driving part (107) is used for driving the diffusion sheet (101) to move along the first direction (A) relative to the first moving layer (103), and the second driving part (108) is used for driving the first moving layer (103) and the diffusion sheet (101) to move along the second direction (B) relative to the base (104), and the first direction (A) and the second direction (B) are intersected.

10. The light homogenizing device according to claim 9, wherein the diffuser assembly (10) further comprises a second moving layer (109), the first moving layer (103) is configured as a frame structure, the diffuser (101) is disposed on the second moving layer (109), the first elastic member (105) connects the frame structure and the second moving layer (109) and supports the second moving layer (109) in a beam passing direction, the second moving layer (109) and the frame structure are disposed at intervals in the first direction (a), and the second elastic member (106) is configured to support the first moving layer (103) in a beam passing direction and connect to the base (104), so that the first moving layer (103) and the base (104) are disposed at intervals in the beam passing direction;

the first driving part (107) is used for driving the second moving layer (109) to reciprocate in the first direction (A) relative to the frame structure, and the second driving part (108) is used for driving the first moving layer (103) and the second moving layer (109) to reciprocate along the second direction (B) relative to the base (104).

11. The light evening device according to claim 10, wherein said frame structure comprises a first frame plate (1031), a second frame plate (1032), a third frame plate (1033) and a fourth frame plate (1034) connected end to end in sequence, said first frame plate (1031) and said third frame plate (1033) being arranged opposite each other along said first direction (a), said second frame plate (1032) and said fourth frame plate (1034) being arranged opposite each other along said second direction (B); the second moving layer (109) comprises two first outer side surfaces (1091) which are arranged opposite to each other along the first direction (a), and the two first outer side surfaces (1091) are respectively arranged at intervals with the first frame plate (1031) and the third frame plate (1033) along the first direction (a);

The first elastic member (105) comprises two first reeds (1051) oppositely arranged along the first direction (a), wherein one first reed (1051) connects one of the first outer side surfaces (1091) with one of the second frame plate (1032) and the fourth frame plate (1034), and the other first reed (1051) connects the other first outer side surface (1091) with one of the second frame plate (1032) and the fourth frame plate (1034); the second elastic member (106) comprises two second reeds (1061) oppositely arranged along the second direction (B), wherein one second reed (1061) connects the outer side surface of the second frame plate (1032) with the base (104), and the other second reed (1061) connects the outer side surface of the fourth frame plate (1034) with the base (104).

12. The light evening device according to claim 11, characterized in that the first strip (1051) comprises a first strip body (10511) and a first support sheet (10512) which extend along the second direction (B), a first strip opening which extends along the second direction (B) and is closed at both ends is formed on the first strip body (10511), the first strip opening comprises two first inner edges (10501) which are oppositely arranged along the second direction (B), and two second inner edges (10502) which are oppositely arranged along the beam penetrating direction, the first support sheet (10512) is arranged in the first strip opening, one end of the first support sheet (10512) is connected to one of the first inner edges (10501), the other end of the first support sheet (10512) is arranged at intervals along the second direction (B) with the other first inner edge (10501), and the first support sheet (10512) is arranged at intervals along the second direction (10502) with the second inner edge (1052) with the first frame (1054) or the fourth frame (1032) is connected to the first strip plate (1091);

And/or, the second reed (1061) comprises a second reed body (10611) and a second supporting piece (10612) which extend along the first direction (a), a second strip opening which extends along the first direction (a) and is closed at two ends is formed on the second reed body (10611), the second strip opening comprises two third inner edges (10601) which are oppositely arranged along the first direction (a) and two fourth inner edges (10602) which are oppositely arranged along the beam penetrating direction, the second supporting piece (10612) is arranged in the second strip opening, one end of the second supporting piece (10612) is connected with one of the third inner edges (10601), the other end of the second supporting piece (10612) and the other third inner edge (10601) are arranged at intervals along the first direction (a), the second supporting piece (10612) and the two fourth inner edges (10602) are oppositely arranged along the beam penetrating direction, and one end of the second supporting piece (10612) is connected with the second reed frame (1032) or the fourth frame (1034) along the penetrating direction, and the second reed frame (10612) is used for connecting with the second side face (1034).

13. The light homogenizing device according to claim 1, wherein the diffuser assembly (10) further comprises a mounting base and a third driving part provided on the mounting base, the refractive element (102) comprises a glass plate swingably provided on the mounting base in a beam propagation direction, and the third driving part is for driving the glass plate to swing in the beam propagation direction.

14. A projector light engine, characterized in that it comprises a light evening device according to any one of claims 1-13.

15. A projector comprising the projector light engine of claim 14.