CN218350696U - Light uniformizing device and projection equipment - Google Patents

Abstract

The utility model discloses an even light device and projection equipment belongs to projection technical field. The light uniformizing device comprises: the utility model discloses a dodging device of dodging mirror subassembly, including fixed bolster, drive assembly, track subassembly and dodging mirror subassembly, wherein, dodging mirror subassembly is installed in the track subassembly, through drive assembly and the cooperation of dodging mirror subassembly, can drive dodging mirror subassembly on the track subassembly along first orbital length direction and the orbital length direction translation motion of second, so, can make dodging mirror subassembly do continuous movement along two directions to reduce the coherence of the laser beam through dodging mirror subassembly, weaken laser beam's speckle phenomenon.

Description

Light uniformizing device and projection equipment

Technical Field

The utility model relates to a projection technology field, in particular to dodging device and projection equipment.

Background

The projection equipment in the laser projection technology can comprise a light source device and an imaging device, laser emitted by the light source device has the characteristic of high coherence, laser speckles exist in laser projection due to the high coherence of the laser, and the laser speckles can influence the quality of a display picture.

The utility model provides a dodging device, includes drive assembly and dodging wheel, and drive assembly can drive the rotation of dodging wheel to make the dodging wheel carry out the processing of eliminating the spot to the laser beam that light source device provided.

However, the light uniformizing device has a large volume and a poor light uniformizing effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a dodging device and projection equipment. The technical scheme is as follows:

according to an aspect of the utility model, a dodging device is provided, dodging device includes:

the device comprises a fixed support, a driving assembly, a track assembly and a dodging mirror assembly;

the driving assembly and the track assembly are arranged on the fixed bracket;

the dodging mirror assembly is installed in the track assembly, the track assembly comprises a first track and a second track which are connected, and the length direction of the first track is crossed with the length direction of the second track;

the driving assembly is movably connected with the dodging mirror assembly, and the driving assembly is matched with the dodging mirror assembly to drive the dodging mirror assembly to move in a manner of being parallel to the length direction of the first track and the plane of the length direction of the second track in a translation manner.

Optionally, the track assembly further comprises a drive bracket;

the light uniformizing assembly is movably connected with the first track, the light uniformizing assembly can move between a first position and a second position on the first track, and the first track is connected with the transmission bracket;

the transmission support is movably connected with the second track, the transmission support can move between a third position and a fourth position on the second track, and the second track is connected with the fixed support.

Optionally, the dodging assembly comprises a dodging element and a carrying support, and the dodging element is mounted on the carrying support;

the bearing support is provided with a first mounting through hole, the first mounting through hole is sleeved outside the first track, and two ends of the first track are fixedly connected with the transmission support;

the transmission support is provided with a second mounting through hole, the second mounting through hole is sleeved outside the second rail, and two ends of the second rail are fixedly connected with the fixed support.

Optionally, the drive assembly comprises a drive unit and a rotating structure;

the driving unit is connected with the rotating structure to drive the rotating structure to rotate by taking a first axis as a shaft;

the rotating structure is rotatably connected with the light homogenizing assembly, and a preset distance is reserved between the connecting position of the rotating structure and the light homogenizing assembly and the first axis.

Optionally, the rotating structure includes a first transmission gear and a first connecting portion located on the first transmission gear, the first transmission gear is movably connected to the fixed bracket, an axis of the first transmission gear is the first axis, and the first connecting portion is located at the connecting position and is rotatably connected to the light uniformizing assembly;

the driving unit comprises a driving motor and a second transmission gear, the driving motor is connected with the second transmission gear to drive the second transmission gear to rotate, and the second transmission gear is meshed with the first transmission gear.

Optionally, the rotating structure includes a first transmission gear and a first connecting portion located on the first transmission gear, the first transmission gear is movably connected to the fixed bracket, an axis of the first transmission gear is the first axis, and the first connecting portion is located at the connecting position and is rotatably connected to the light uniformizing assembly;

the drive unit comprises a drive motor and a transmission worm, the drive motor is connected with the transmission worm to drive the transmission worm to rotate, and the transmission worm is meshed with the first transmission gear.

Optionally, the fixed support comprises a mounting bracket having a light-transmissive through-hole, the track assembly being mounted in the light-transmissive through-hole.

Optionally, the fixed bracket comprises a mounting housing and a reflective portion;

the installation casing has the mounting groove, the track subassembly is installed in the mounting groove, the reflection part is located the tank bottom of mounting groove.

Optionally, the dodging assembly comprises a dodging element and a carrying support, wherein the dodging element comprises a light-transmitting container and a diffusion medium;

the light-transmitting container is provided with a cavity, the diffusion medium is positioned in the cavity, and the light-transmitting container is fixedly connected with the bearing support.

According to another aspect of the present invention, there is provided a projection apparatus, which includes a light source device, a light uniformizing device and an imaging device arranged along a light path, wherein the light uniformizing device is the above-mentioned light uniformizing device.

The embodiment of the utility model provides a beneficial effect that technical scheme brought includes at least:

the utility model provides an even light device including fixed bolster, the drive assembly, track subassembly and even light subassembly, wherein, even light subassembly is installed in track subassembly, through drive assembly and even light subassembly cooperation, can drive even light subassembly on track subassembly along the length direction of first orbital length direction and the length direction translation motion of second track, thus, can make even light subassembly be continuous removal along two directions, in order to reduce the coherence of the laser beam through even light subassembly, weaken the speckle phenomenon of laser beam, and the volume of the even light subassembly that moves along two directions is less than the volume along a direction pivoted even light wheel, the homogenization effect is better, can solve the great and relatively poor problem of homogenization effect of even light device's volume in the correlation technique, the homogenization effect of even light device has been improved, and the miniaturized effect of even light device has been realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.

FIG. 1 is a schematic diagram of a projection apparatus;

FIG. 2 is a schematic diagram of a light unifying means in the projection apparatus shown in FIG. 1;

fig. 3 is a schematic structural diagram of a light uniformizing device according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the light unifying apparatus shown in FIG. 3, viewed in a direction perpendicular to the mirror plane of the light unifying assembly;

fig. 5 is an exploded schematic view of a dodging device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first plane according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a track assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view of the track assembly shown in FIG. 7 looking in a second direction toward the track assembly;

fig. 9 is a schematic view of a connection structure between a light homogenizing assembly and a first rail according to an embodiment of the present invention;

fig. 10 is a schematic view of a connection structure between a first rail and a transmission bracket according to an embodiment of the present invention;

FIG. 11 is a schematic view of the first track and drive bracket shown in FIG. 10, viewed in a second direction;

fig. 12 is a schematic view of a connection structure between a transmission bracket and a second rail according to an embodiment of the present invention;

fig. 13 is a schematic view of a connection structure of a transmission bracket, a second rail and a fixing bracket according to an embodiment of the present invention;

FIG. 14 is a schematic structural view of the drive bracket, second rail and stationary bracket of FIG. 13 as viewed in a second direction;

fig. 15 is a schematic view of a connection structure of a light homogenizing assembly, a first rail and a transmission bracket according to an embodiment of the present invention;

FIG. 16 is a schematic structural view of the dodging assembly, the first track and the driving bracket shown in FIG. 15, as seen in a second direction;

fig. 17 is a schematic view of a connection structure between a second rail and a fixing bracket according to an embodiment of the present invention;

FIG. 18 is a schematic view of the second rail and the fixing bracket shown in FIG. 17, viewed in a second direction;

fig. 19 is a schematic diagram comparing the moving directions of a dodging element provided by the embodiment of the present invention;

fig. 20 is a schematic structural diagram of a movement cycle of a dodging element according to an embodiment of the present invention;

fig. 21 is a schematic view illustrating an effect of a light-uniformizing lens provided by an embodiment of the present invention;

fig. 22 is a schematic structural diagram of another light uniformizing device provided by the embodiment of the present invention;

fig. 23 is a schematic structural diagram of another light uniformizing device provided by the embodiment of the present invention;

fig. 24 is a schematic structural diagram of another light uniformizing device provided by the embodiment of the present invention;

fig. 25 is a schematic structural diagram of another driving assembly provided in the embodiment of the present invention;

FIG. 26 is a schematic structural view of the light unifying apparatus shown in FIG. 24, viewed in a direction parallel to the mirror plane of the light unifying assembly;

fig. 27 is a schematic structural diagram of another light uniformizing device provided by the embodiment of the present invention;

fig. 28 is a schematic structural diagram of a light uniformizing assembly according to an embodiment of the present invention;

fig. 29 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention;

fig. 30 is a schematic structural view of a projection apparatus in the related art;

fig. 31 is a schematic comparison diagram of a light uniformizing device in an embodiment of the present invention and a related art light uniformizing device.

With the above figures, certain embodiments of the present invention have been shown and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The laser projection technology has become the mainstream development direction in the market because of its advantages of high image contrast, clear image, bright color, high brightness, etc. The projection equipment in the laser projection technology can comprise a light source device and an optical-mechanical component, and the quality of a light source provided by the light source device is an important factor influencing the display effect of the projection equipment. Laser has the characteristics of high coherence, and the high coherence of laser can cause and have laser speckle in the laser projection, and when laser speckle means coherent light source illumination coarse object, the light after the scattering is because the phase difference is invariable, and the light wave frequency is the same, and the vibration direction is unanimous, produces the interference in the space, and some partial interference is long, and some partial interference is destructive, and then can form the granular point of light intensity distribution light and dark unevenness on the screen, and it can be understood that this laser speckle can influence the display effect that shows the picture.

At present, in order to eliminate the influence of laser speckle on a display screen, a light uniformizing device is disposed in a light source device, as shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a projection apparatus 10, fig. 2 is a schematic structural diagram of a light uniformizing device 11 in the projection apparatus shown in fig. 1, the projection apparatus 11 includes the light uniformizing device 11, a light source device 12, and an imaging device 13, the light source device 11 is configured to emit a laser beam s1, and the light uniformizing device 11 receives the laser beam s1 and irradiates the processed laser beam s1 to the imaging device 13. The dodging device 11 comprises a dodging wheel 111 and a driving component 112, when laser beams irradiate the dodging device 11, the driving component 112 drives the dodging wheel 111 to rotate at a high speed along one direction, and therefore the purposes of reducing laser coherence and inhibiting laser speckles are achieved.

However, the above-described dodging device 11 has two problems:

1. as can be seen from fig. 1 and fig. 2, during the use of the light homogenizing device 11, the light homogenizing wheel 111 has a light receiving area 11a and a non-light receiving area 11b, and the size of the non-light receiving area 11b is larger than that of the light receiving area 11a, so that the larger size of the non-light receiving area 11b results in the larger size of the light homogenizing wheel 111.

2. Since the driving assembly 112 can only drive the light uniformizing wheel 111 to move along one direction, that is, the moving direction of the light uniformizing wheel 111 is relatively fixed, the speckle dissipation effect of the light uniformizing device 11 is poor, and further the quality of the display picture of the projection apparatus is poor.

The embodiment of the utility model provides an even light device and projection equipment can solve some problems that the above-mentioned provided.

Fig. 3 is a schematic structural diagram of a light uniformizing device 20 according to an embodiment of the present invention, fig. 4 is a schematic structural diagram of the light uniformizing device 20 shown in fig. 3 as viewed from a direction perpendicular to the mirror surface p2 of the light uniformizing assembly 24, and fig. 5 is a schematic structural diagram of an explosion of the light uniformizing device 20 according to an embodiment of the present invention, please refer to fig. 3, fig. 4 and fig. 5. The light unifying means 20 may comprise: a fixed bracket 21, a driving assembly 22, a track assembly 23 and a dodging assembly 24.

The driving assembly 22 and the track assembly 23 can be installed on the fixed bracket 21, the driving assembly 22 can be movably connected with the fixed bracket 21, and the track assembly 23 can be fixedly connected with the fixed bracket.

The dodging assembly 24 may be installed in the track assembly 23, the track assembly 23 may include a first track 231 and a second track 233 connected to each other, a longitudinal direction f3 of the first track 231 and a longitudinal direction f4 of the second track 233 may intersect, the longitudinal direction f3 of the first track 231 is an extending direction of the first track 231, the structure installed on the first track 231 is capable of moving in the longitudinal direction f3 of the first track 231, the longitudinal direction f4 of the second track 233 is an extending direction of the second track 233, and the structure installed on the second track 233 is capable of moving in the longitudinal direction f4 of the second track 233, that is, the extending direction of the first track 231 and the extending direction of the second track 233 are different.

The driving assembly 22 may be movably connected to the light uniformizing assembly 24, and the driving assembly 22 can be matched with the light uniformizing assembly 24 to drive the light uniformizing assembly 24 to perform translational motion in a plane parallel to the length direction f3 of the first track 231 and the length direction f4 of the second track 231.

The plane may be a first plane, that is, the dodging assembly 24 may be driven to move in translation on the first rail 231 and the second rail 233 of the rail assembly 23 along a direction parallel to the first plane. The driving assembly 22 can drive the dodging assembly 24 to move continuously on the track assembly 23 along a predetermined path in the first plane, and the dodging assembly 24 can move in two different directions (the length direction f3 of the first track 231 and the length direction f4 of the second track 233). When the driving frequency of the driving assembly 22 reaches the preset frequency, the dodging assembly 24 can be made to vibrate periodically in the first plane to reduce the spatial coherence and temporal coherence of the laser beam passing through the dodging assembly 24, so that the laser speckle can be eliminated effectively, and thus, the laser beam passing through the dodging assembly 24 can be homogenized through the cooperation of the driving assembly 22, the dodging assembly 24 and the track assembly 23, which can also be called as speckle elimination processing.

The first plane is a plane having a preset included angle with the mirror surface p2 of the light uniformizing assembly 24, and the preset included angle is greater than or equal to 0 degree and smaller than 90 degrees.

To sum up, the embodiment of the utility model provides an dodging device including fixed bolster, drive assembly, track subassembly and dodging subassembly, wherein, dodging unit mount is in track subassembly, through drive assembly and dodging subassembly cooperation, can drive dodging subassembly along first orbital length direction and the orbital length direction translation motion of second on track subassembly, thus, can make dodging subassembly do continuous movement along two directions, with the coherence that reduces the laser beam through dodging subassembly, weaken laser beam's speckle phenomenon, and, the volume of dodging subassembly that removes along two directions is compared in the volume of following a direction pivoted dodging wheel less, the homogenization effect is better, can solve the great and relatively poor problem of homogenization effect of dodging device's volume in the correlation technique, the homogenization effect of dodging device has been improved, and the miniaturized effect of dodging device has been realized.

It should be noted that, because the extending direction of the first track 231 and the second track 233 in the embodiment of the present invention is different, therefore, the dodging assembly 24 can have a plurality of moving directions, so that the light spot of the laser beam irradiated to the dodging assembly 24 can be homogenized two-dimensionally through the dodging assembly 24, compared with the static diffusion sheet in the related art, or the dodging wheel in the related art can only rotate, the tangential one-dimensional homogenization along the rotation direction of the dodging wheel is performed on the light spot, the homogenization effect of the dodging device 20 can be improved, and further the picture uniformity and the display effect of the display device can be improved.

In the embodiment, the mirror surface p2 of the light equalizing assembly 24 may include a light incident surface and a light emitting surface, where the light incident surface is a surface of the light equalizing assembly 24 for receiving the laser beam, and the light emitting surface is a surface of the light equalizing assembly 24 for emitting the laser beam. The dodging assembly 24 may receive the laser beam emitted from the light source device through the light incident surface, perform speckle elimination on the received laser beam, and emit the processed laser beam out of the light emitting surface. This play plain noodles and income plain noodles can be for two relative and parallel faces, the embodiment of the utility model provides an in the even light subassembly 24 towards a mirror surface p2 of light source device be called into the plain noodles, a mirror surface p2 that deviates from the light source device is called out the plain noodles, do not prescribe a limit to the locating place of going out the plain noodles and going into the plain noodles in practical application, promptly in some embodiments, go out the position of plain noodles and going into the plain noodles and can exchange, deviate from the fixed bolster 21 one side and can be for going out the plain noodles in the even light subassembly 24 that shows in figure 3, another side relative with going out the plain noodles can be for going into the plain noodles, perhaps deviate from the fixed bolster 21 one side and can be for going into the plain noodles in the even light subassembly 24, another side relative with going out the plain noodles can be for going out the plain noodles.

Fig. 6 is a schematic structural diagram of a first plane p1 according to an embodiment of the present invention. The first plane p1 may be a plane having a predetermined included angle α equal to 0 degree and smaller than 90 degrees with the mirror surface p2 of the light unifying assembly 24, further, the first plane p1 may be a plane parallel to the mirror surface p2 of the light unifying assembly 24, and the first plane p1 may be a virtual plane. Alternatively, the first plane p1 may be the mirror p2 of the light unifying component 24.

Fig. 7 is a schematic structural diagram of a track assembly 23 according to an embodiment of the present invention, and fig. 8 is a schematic structural diagram of the track assembly 23 shown in fig. 7, which is viewed from a second direction f2 to the track assembly 23, please refer to fig. 7 and fig. 8, wherein the second direction f2 is a direction perpendicular to a plane where the first track 231 is located. Optionally, the track assembly 23 may include a first track 231, a transmission bracket 232, and a second track 233. The first track 231 may include a first sub-track 2311 having a bar shape and a second sub-track 2312 having a bar shape, and a length direction of the first sub-track 2311 and a length direction of the second sub-track 2312 are parallel; the second rail 233 may include a third sub-rail 2331 having a bar shape and a fourth sub-rail 2332 having a bar shape, and a length direction of the third sub-rail 2331 is parallel to a length direction of the fourth sub-rail 2332. The first rail 231 may be fixedly connected with the driving bracket 232, the driving bracket 232 may be movably connected with the second rail 233, and the second rail 233 may be fixedly connected with the fixing bracket 21.

Fig. 9 is a schematic view of a connection structure between the light uniformizing element 24 and the first rail 231 according to an embodiment of the present invention, please refer to fig. 9, the light uniformizing element 24 can be movably connected to the first rail 231, and the light uniformizing element 24 can move between a first position 231a and a second position 231b on the first rail 231. Further, the dodging assembly 24 can move back and forth between a first position 231a and a second position 231b on the first track 231, a connection line direction of the first position 231a and the second position 231b can be parallel to the length direction f3 of the first track 231, and a connection line direction of the first position 231a and the second position 231b can be parallel to the first plane.

Fig. 10 is a schematic view of a connection structure between a first rail 231 and a transmission bracket 232 according to an embodiment of the present invention, and fig. 11 is a schematic view of the structure between the first rail 231 and the transmission bracket 232 shown in fig. 10, which is seen from a second direction f2, please refer to fig. 10 and 11. The transmission bracket 232 may have a U-shape, and the transmission bracket 232 may include a first transmission beam 2321, a second transmission beam 2322 and a third transmission beam 2323, wherein a length direction of the first transmission beam 2321 and a length direction of the second transmission beam 2322 may be parallel, a length direction of the first transmission beam 2321 and a length direction of the third transmission beam 2323 intersect, and further, a length direction of the first transmission beam 2321 and a length direction of the third transmission beam 2323 are perpendicular. The first end of the first transmission beam 2321 and the first end of the second transmission beam 2322 are respectively and fixedly connected with two ends of the third transmission beam 2323.

The first rail 231 may be connected to the driving bracket 232, and further, the first rail 231 may be fixedly connected to the driving bracket 232. The length direction of the first rail 231 may be parallel to the length direction of the first transmission beam 2321, and the first sub-rail 2311 and the second sub-rail 2312 of the first rail 231 may be respectively mounted on the first transmission beam 2321 and the second transmission beam 2322, so that the first transmission beam 2321 and the second transmission beam 2322 may support and fix the first rail 231.

For example, as shown in fig. 10, the first drive beam 2321 and the second drive beam 2322 of the drive bracket 232 may each be L-shaped. The second end of the first transmission beam 2321, which is away from the third transmission beam 2323, and the second end of the second transmission beam 2322, which is away from the third transmission beam 2323, are provided with a first mounting portion 232a, the third transmission beam 2323 is provided with a second mounting portion 232b, the first mounting portion 232a and the second mounting portion 232b can be through holes, and two ends of the first rail 231 can be respectively mounted in the first mounting portion 232a and the second mounting portion 232 b.

Fig. 12 is a schematic view of a connection structure between a transmission bracket 232 and a second rail 233 according to an embodiment of the present invention, please refer to fig. 12. The driving bracket 232 may be movably connected to the second rail 233, the driving bracket 232 may be movable between a third position 233a and a fourth position 233b on the second rail 233, the driving bracket 232 may be movable back and forth between the third position 233a and the fourth position 233b on the second rail 233, a line connecting the third position 233a and the fourth position 233b may be parallel to the length direction f4 of the second rail 233, and a line connecting the third position 233a and the fourth position 233b may be parallel to the first plane. In this way, the driving bracket 232 moves on the second rail 233 to drive the first rail and the dodging assembly mounted on the first rail to move between the third position 233a and the fourth position 233b on the second rail 233.

Fig. 13 is a schematic view of a connection structure of the transmission bracket 232, the second rail 233 and the fixing bracket 21 according to an embodiment of the present invention, and fig. 14 is a schematic view of the transmission bracket 232, the second rail 233 and the fixing bracket 21 shown in fig. 13, as seen from the second direction f2, please refer to fig. 13 and 14. The second rail 233 may be connected to the fixing bracket 21, the fixing bracket 21 may support and fix the second rail 233, and the second rail 233 may be located inside the fixing bracket 21, and the fixing bracket 21 may protect the second rail 233.

Fig. 15 is a schematic view of a connection structure of the dodging assembly 24, the first rail 231 and the transmission bracket 232 according to an embodiment of the present invention, and fig. 16 is a schematic view of the dodging assembly 24, the first rail 231 and the transmission bracket 232 shown in fig. 15 when viewed along the second direction f2, please refer to fig. 15 and fig. 16. Optionally, the light equalizing assembly 24 may include a light equalizing element 241 and a carrying bracket 242, the light equalizing element 241 may be installed on the carrying bracket 242, and a mirror surface of the light equalizing assembly 24 may be a light incident surface of the light equalizing element 241 or a light emitting surface of the light equalizing element 241. The light uniformizing element 241 may include a diffusion sheet, frosted glass, or other element having a light uniformizing function.

The bearing bracket 242 may have a first mounting through hole g1, and the first mounting through hole g1 is sleeved outside the first rail 231, so that the bearing bracket 242 can move on the first rail 231, and the connection between the bearing bracket 242 and the first rail 231 is stable.

In an alternative embodiment, the bearing bracket 242 includes a bracket main body 2422 and a plurality of protrusion structures 2423, the plurality of protrusion structures 2423 are located on two sides of the bracket main body 2422 in a direction perpendicular to the length direction of the first rail 231, and the plurality of protrusion structures 2423 are fixedly connected to the bracket main body 2422, the first mounting through holes g1 may be located in the protrusion structures 2423, the number of the first mounting through holes g1 may be four, and the number of the protrusion structures 2423 may also be four, so that the first rail 231 only penetrates through the protrusion structures 2423, the contact area between the bearing bracket 242 and the first rail 231 may be reduced, and the friction force of the bearing bracket 242 sliding on the first rail 231 may be reduced.

Both ends of the first rail 231 can be fixedly connected with the transmission bracket 232 to limit the dodging assembly 24 mounted on the first rail 231, so that the dodging assembly 24 moves between the first position 231a and the second position 231b of the first rail 231 to prevent the dodging assembly 24 from being separated from the first rail 231.

As shown in fig. 13 and 15, the transmission bracket 232 has a second mounting through hole g2, and the transmission bracket 232 may have three second mounting through holes g2, wherein one second mounting through hole g2 may be located on the third transmission beam 2323 and parallel to the length direction of the third transmission beam 2323, the other two second mounting through holes g2 may be located at the second end of the first transmission beam 2321 and the second end of the second transmission beam 2322, the length direction of the first mounting through hole g1 and the length direction of the second mounting through hole g2 may be perpendicular, and the second mounting through hole g2 may be sleeved outside the second rail 233, so that the transmission bracket 232 can move on the second rail 233, and further, the connection between the transmission bracket 232 and the second rail 233 is stable.

Fig. 17 is a schematic view of a connection structure between the second rail 233 and the fixing bracket 21 according to an embodiment of the present invention, and fig. 18 is a schematic view of the structure between the second rail 233 and the fixing bracket 21 shown in fig. 17, which is seen from the second direction f2, please refer to fig. 17 and 18. Both ends of the second rail 233 may be fixedly connected with the fixing bracket 21 to limit the transmission bracket 232 mounted on the second rail 233, so that the transmission bracket 232 moves between the third position 233a and the fourth position 233b of the second rail 233, and the transmission bracket 232 is prevented from being separated from the second rail 233, so that the dodging assembly 24 moves between the third position 233a and the fourth position 233b of the second rail 233.

As shown in fig. 7, the length direction of the first track 231 may cross the length direction of the second track 233, and further, the length direction of the first track 231 may be perpendicular to the length direction of the second track 233, so that the light unifying assembly 24 can move back and forth along the length direction of the first track 231, and at the same time, the light unifying assembly 24 can also move back and forth along the length direction of the second track 233.

Fig. 19 is a comparison schematic diagram of a moving direction of an optical uniforming element 241 according to an embodiment of the present invention, fig. 20 is a schematic diagram of a moving period of an optical uniforming element 241 according to an embodiment of the present invention, fig. 21 is a schematic diagram of an effect of an optical uniforming lens according to an embodiment of the present invention, please refer to fig. 19, fig. 20 and fig. 21, fig. 19 shows a moving direction c1 of a rotating optical uniforming wheel in the related art, and fig. 20 shows moving directions c2 and c3 of an optical uniforming element 241 according to an embodiment of the present invention, fig. 20 shows a schematic diagram of a moving direction of an optical uniforming element 241 between four positions along a length direction of a first rail 231 and a length direction of a second rail 233. The four positions may include a fifth position D1, a sixth position D2, a seventh position D3, and an eighth position D4, and when the light unifying element 241 is simultaneously located at the first position 231a of the first track 231 and the second position 231b of the second track 233, the light unifying element 241 may be located at the fifth position D1 shown in fig. 20; in the same way, when the light unifying element 241 is located at the second position 231b of the first track 231 and the second position 231b of the second track 233 at the same time, the light unifying element 241 may be located at the sixth position D2 shown in fig. 20; when the light unifying element 241 is located at both the second position 231b of the first track 231 and the first position 231a of the second track 233, the light unifying element 241 may be located at the seventh position D3 shown in fig. 20; when the light unifying element 241 is located at both the first position 231a of the first track 231 and the first position 231a of the second track 233, the light unifying element 241 may be located at the eighth position D4 shown in fig. 20.

Therefore, because the utility model discloses the extending direction of first track 231 and second track 233 in the embodiment is different, consequently, dodging element 241 can have two moving direction, can make the facula of the laser beam who shines dodging element 241 through dodging lens two-dimentional homogenization, that is, through setting up the track subassembly, realize dodging element 241 and move between four quadrants in the first plane, this four quadrants indicate fifth position D1 promptly, sixth position D2, seventh position D3 and eighth position D4, compare in the correlation technique dodging wheel (diffusion wheel) only can carry out the tangential one-dimensional homogenization along diffusion wheel rotation direction to the facula, can promote dodging device 20's dissipation spot effect, and then can improve display device's picture homogeneity and display effect. As shown in fig. 21, when the light equalizing lens in the light equalizing device 20 is not in motion, the display screen of the projection apparatus is in stripes with different colors, which are arranged at intervals in the screen, and the color of the display screen is not uniform enough, and when the light equalizing lens in the light equalizing device 20 is in motion, the color of the display screen of the projection apparatus is uniform, and the display effect is good.

Fig. 22 is a schematic structural diagram of another light uniformizing device 20 according to an embodiment of the present invention, referring to fig. 22, the driving assembly 22 may include a driving unit and a rotating structure 222, and the driving unit may be a driving motor 221. The driving unit is connected with the rotating structure 222 to drive the rotating structure 222 to rotate by taking the first axis as a shaft; the rotating structure 222 can be rotatably connected with the light unifying assembly 24, and the connecting position of the rotating structure 222 and the light unifying assembly 24 has a preset distance from the first axis. Thus, the driving unit can rotate the rotating structure 222 around the first axis as an axis, so as to drive the dodging assembly 24 to move through the rotating structure 222.

The preset distance between the connection position and the first axis may be a length of a perpendicular line from a point (connection position) to a straight line (first axis).

Illustratively, the rotating structure 222 may include a rotating rod 2223, one end of the rotating rod 2223 is connected to a rotating shaft of the driving motor 221, the other end of the rotating rod 2223 is rotatably connected to the dodging assembly, the other end of the rotating rod 2223 may be located at a connection position of the rotating structure 222 and the dodging assembly 24, the driving motor 221 may drive the rotating rod 2223 to rotate by using one end of the rotating rod 2223 as a shaft, a rotation axis of the rotating rod 2223 is a first axis, the other end of the rotating rod 2223 is located at a position which can use one end of the rotating rod 2223 as a circle center, and a length of the rotating rod 2223 as a radius, so as to drive the dodging assembly to rotate.

Fig. 23 is a schematic structural diagram of another light uniform device 20 according to an embodiment of the present invention, please refer to fig. 23, alternatively, the rotating structure 222 may include a first transmission gear 2221 and a first connection portion 2222 located on the first transmission gear 2221, the first transmission gear 2221 is movably connected with the fixed bracket 21, an axis of the first transmission gear 2221 is the first axis, the first connection portion 2222 is located at a connection position between the rotating structure 222 and the light uniform assembly 24, and the first connection portion 2222 is rotatably connected with the light uniform assembly 24; the driving unit may be a driving motor 221, and the driving motor 221 may be connected to the first transmission gear 2221 to drive the first transmission gear 2221 to rotate.

The first connection portion 2222 may be located on one surface of the first transmission gear 2221, or the first connection portion 2222 may be connected to an edge of the first transmission gear 2221, and a predetermined distance is formed between the first connection portion 2222 and an axis of the first transmission gear 2221, and the first connection portion 2222 is rotatably connected to the light unifying unit 24. The carrying bracket 242 in the light unifying assembly 24 may include a connecting through hole therein, and the first connecting portion 2222 may be located in the connecting through hole.

The first transmission gear 2221 can rotate around the axis of the first transmission gear 2221, which can coincide with the center of the first transmission gear 2221, so as to drive the first connection portion 2222 to move along the circumferential direction of the first transmission gear 2221, and further drive the dodging assembly 24 to slide on the track assembly 23. In this way, during the use of the light uniform device 20, the driving motor 221 drives the first transmission gear 222 to rotate, so that the light uniform assembly 24 can move on the track assembly 23, the light uniform assembly 24 can move between the first position 231a and the second position 231b of the first track 231 along the length direction of the first track 231, and the light uniform assembly 24 can also move between the third position 233a and the fourth position 233b of the second track 233 along the length direction of the second track 233.

The light uniform assembly 24 can be eccentrically connected to the first transmission gear 222 through the first connection portion 2222, that is, the connection position between the light uniform assembly 24 and the first transmission gear 222 deviates from the center of the first transmission gear 222, and a preset distance is provided between the connection position and the center of the first transmission gear 222, so that the movement precision of the light uniform assembly 24 on the track assembly can be improved, and the homogenization effect of the light uniform assembly can be further improved.

For example, the first transmission gear 2221 may rotate around the center of the first transmission gear 2221, including: rotation about the third direction and rotation about the fourth direction. Wherein the third direction may be one of a clockwise rotation direction and a counterclockwise rotation direction, and the fourth direction may be the other of the clockwise rotation direction and the counterclockwise rotation direction.

When the first transmission gear 2221 is rotated in the third direction about the center of the first transmission gear 2221, the light distributing element 241 can be moved along the movement cycle of the light distributing element 241 as shown in figure 20, i.e., the light distributing element 241 can be moved in the sequence of the fifth position D1, the sixth position D2, the seventh position D3 and the eighth position D4.

When the first transmission gear 2221 is rotated in the fourth direction about the center of the first transmission gear 2221, the light unifying element 241 may be moved in the reverse direction of the movement period of the light unifying element 241 as shown in fig. 20, that is, the light unifying element 241 may be moved in the order of the eighth position D4, the seventh position D3, the sixth position D2 and the fifth position D1.

In an alternative embodiment, the first transmission gear 2221 in fig. 23 may also be a disk or other rotatable structure.

Optionally, fig. 24 is a schematic structural diagram of another light uniformizing device 20 according to an embodiment of the present invention, please refer to fig. 24. The driving unit may include a driving motor 221 and a second transmission gear 223, the driving motor 221 may be connected to the second transmission gear 223 to drive the second transmission gear 223 to rotate, the second transmission gear 223 may be engaged with the first transmission gear 2221, and the second transmission gear 223 may be rotatably connected to the fixing bracket 21. The first transmission gear 2221 and the second transmission gear 223 are meshed and connected, so that the transmission of the driving assembly 22 is smooth and the reliability is high.

Alternatively, the diameter of the second transmission gear 223 is larger than that of the first transmission gear 2221, and the second transmission gear 223 can be used to increase the rotation speed of the first transmission gear 2221, so that the moving speed of the light uniform assembly 24 on the track assembly 23 can be increased, and the light uniform effect of the light uniform device 20 can be improved.

Fig. 25 is a schematic structural diagram of another driving assembly 22 according to an embodiment of the present invention, please refer to fig. 25. Alternatively, the driving assembly 22 may include a driving motor 221 and a driving worm 225, the driving motor 221 may be connected to the driving worm 225, and the driving worm 225 may be engaged with the first driving gear 2221. Thus, the driving motor 221 can drive the driving worm 225 to rotate so as to drive the first driving gear 2221 to rotate, so that the driving assembly 22 has a simple structure, a small size and good applicability.

The embodiment of the utility model provides an in the gear drive mode among the drive assembly 22, can also include straight gear drive, parallel shaft helical gear transmission and cylindrical gear transmission etc. the embodiment of the utility model provides a do not restrict to this.

Fig. 26 is a schematic structural view of the light unifying apparatus 20 shown in fig. 24, as seen in a direction parallel to the mirror plane p2 of the light unifying assembly 24, and fig. 26 also shows a schematic perspective structural view of the light unifying apparatus 20, please refer to fig. 24 and fig. 26. Alternatively, the fixing bracket 21 may include a mounting bracket 211, the mounting bracket 211 having a light-transmitting through hole, and the rail assembly may be mounted in the light-transmitting through hole. In this way, the laser beam S received by the light uniformizing device 20 may pass through the light uniformizing element 241 to reduce the speckle phenomenon of the laser beam S. The laser beam S can directly pass through the dodging element 241 and exit the dodging device 20, so that the optical path structure is simple.

Alternatively, the fixing bracket 21 may further include a mounting plate 212, the mounting bracket 211 and the mounting plate 212 are connected and arranged along a first direction f1, the first direction f1 is parallel to the length direction of the first rail 231, and the driving assembly 22 is mounted on the mounting plate 212. Alternatively, a first drive gear in the drive assembly may be coupled to the mounting bracket 211 and a second drive gear may be coupled to the mounting plate 212.

Fig. 27 is a schematic structural diagram of another light uniformizing device 20 according to an embodiment of the present invention, and optionally, the fixing bracket 21 may include a mounting housing 213 and a reflecting portion 214; the mounting case 213 has a mounting groove in which the rail assembly can be mounted, and the reflection part is located at the bottom of the mounting groove. With such a structure, the laser beam S emitted from the laser light source passes through the light uniformizing element 241 after being irradiated to the light uniformizing device 20, is irradiated to the reflection portion 214 on the fixing bracket 21, is reflected by the reflection portion 214, passes through the light uniformizing element 241 again, and is emitted out of the light uniformizing device 20. The laser beam S can pass through the dodging element 241 twice to achieve a better speckle elimination effect.

Alternatively, the fixing bracket 21 may further include a mounting plate 212, and the mounting housing 213 and the mounting plate 212 are arranged along a first direction f1, the first direction f1 being a direction parallel to the length direction of the first rail 231; the drive assembly 22 is mounted on the mounting plate 212.

Fig. 28 is a schematic structural diagram of a light uniformizing assembly according to an embodiment of the present invention, please refer to fig. 28, optionally, the light uniformizing assembly 24 may include a light uniformizing element 241 and a supporting bracket 242, the light uniformizing element 241 includes a light transmitting container 2411 and a diffusion medium 2412, a mirror surface of the light uniformizing assembly 24 may be a light incident surface of the light transmitting container 2411 or a light emergent surface of the light transmitting container 2411, the light transmitting container may be a circular plate 2411, and the light incident surface and the light receiving surface of the light transmitting container 2411 may be parallel.

The light-transmissive container 2411 has a cavity in which the diffusion medium 2412 is located, and the light-transmissive container 2411 is fixedly attached to the carrier support 242. When the laser beam irradiates the light homogenizing device 20, the driving assembly 22 can drive the light-transmitting container 2411 to move on the track assembly 23, so that the diffusion medium 2412 in the light-transmitting container 2411 moves along with the light-transmitting container 2412, and thus coherence of the laser beam passing through the diffusion medium 2412 can be effectively reduced, and speckle phenomenon of the laser beam can be reduced. The diffusion media 2412 may include one or more of a liquid medium, a solid medium, or a solid-liquid mixture medium. Illustratively, the diffusion media 2412 may include sodium chloride solution, spherical particles of silica, or ethanol, among others.

In an exemplary embodiment, the light uniforming member 241 may include a diffusion sheet.

To sum up, the embodiment of the utility model provides an even light device including fixed bolster, drive assembly, track subassembly and even light subassembly, wherein, even light unit mount is in track subassembly, through drive assembly and even light subassembly cooperation, can drive even light subassembly along first orbital length direction and the orbital length direction translation motion of second on track subassembly, so, can make even light subassembly be continuous removal along two directions, in order to reduce the coherence of the laser beam through even light subassembly, weaken laser beam's speckle phenomenon, and, the volume of the even light subassembly that moves along two directions is compared in the volume of following a direction pivoted even light wheel less, the homogenization effect is better, can solve the great and relatively poor problem of homogenization effect of the volume of even light device among the correlation technique, the homogenization effect of even light device has been improved, and the miniaturized effect of even light device has been realized.

Fig. 29 is a schematic structural diagram of a projection apparatus 30 according to an embodiment of the present invention, and referring to fig. 27, the projection apparatus 30 may include a light source device 31, a light uniformizing device 32 and an image forming device 33 arranged along a light path, and the light uniformizing device 32 may be the light uniformizing device 20 in any one of the embodiments of the present invention.

The light source device 31 includes a light emitting device 311, a light combining mirror 312, a first lens 313, a first reflecting mirror 314, and a second lens 315, which are disposed along a light path, where the light emitting device 311 may include a laser, and the laser may include a plurality of light emitting chips arranged in an array. The light emitting chips can emit laser beams with multiple colors to the light combining mirror 312, the light combining mirror 312 combines the laser beams with multiple colors and irradiates the laser beams to the first lens 313, the first lens 313 is used for converging the laser beams, the first lens 313 irradiates the converged laser beams to the first reflecting mirror 314, an included angle between a light incident surface of the first reflecting mirror 314 and a main optical axis of the first lens 313 can be 45 degrees, the first reflecting mirror 314 is used for changing the transmission direction of the laser beams, the first reflecting mirror 314 reflects the laser beams to the second lens 315, the second lens 315 receives the laser beams and irradiates the laser beams converged again to the light homogenizing device 32, and thus, the size of a light spot of the laser beams irradiating the light homogenizing device 32 can be smaller, and the volume of the light homogenizing device 32 can be smaller.

The imaging device 33 includes a third lens 331, a second mirror 332, a fourth lens 333, a TIR (Total internal reflection) prism 334 and an imaging device 335, which may include a digital micromirror device, disposed along an optical path. The dodging device 32 receives the laser beam, performs speckle elimination processing on the laser beam, irradiates the processed laser beam to the third lens 331, irradiates the converged laser beam to the second reflecting mirror 332 by the third lens 331, and also changes the transmission direction of the laser beam by the second reflecting mirror 332, so that components in the projection setting can be compact, and the projection setting can be miniaturized; the second reflecting mirror 332 reflects the laser beam to the fourth lens 333, the fourth lens 333 receives the laser beam and irradiates the converged laser beam to the TIR prism 334, the TIR prism 334 is used for guiding at least part of the laser beam to the digital micro-mirror device, and the digital micro-mirror device can process at least part of the laser beam and guide the processed beam to the projection lens, thereby realizing the imaging function.

Fig. 30 is a schematic structural diagram of a projection apparatus in the related art, and fig. 31 is a schematic comparison diagram of an optical homogenizer in an embodiment of the present invention and an optical homogenizer in the related art, where an optical homogenizer 11 in a projection apparatus in the related art may include a driving assembly and an optical homogenizer wheel, as can be seen from fig. 31, a volume of the optical homogenizer in an embodiment of the present invention is smaller than a volume of the optical homogenizer in the related art.

To sum up, the embodiment of the utility model provides an dodging device including fixed bolster, drive assembly, track subassembly and dodging subassembly, wherein, dodging unit mount is in track subassembly, through drive assembly and dodging subassembly cooperation, can drive dodging subassembly along first orbital length direction and the orbital length direction translation motion of second on track subassembly, thus, can make dodging subassembly do continuous movement along two directions, with the coherence that reduces the laser beam through dodging subassembly, weaken laser beam's speckle phenomenon, and, the volume of dodging subassembly that removes along two directions is compared in the volume of following a direction pivoted dodging wheel less, the homogenization effect is better, can solve the great and relatively poor problem of homogenization effect of dodging device's volume in the correlation technique, the homogenization effect of dodging device has been improved, and the miniaturized effect of dodging device has been realized.

In the present application, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless explicitly defined otherwise.

The above description is only an optional embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A light unifying apparatus, comprising: the device comprises a fixed support, a driving assembly, a track assembly and a dodging mirror assembly;

the driving assembly and the track assembly are arranged on the fixed bracket;

the dodging mirror assembly is installed in the track assembly, the track assembly comprises a first track and a second track which are connected, and the length direction of the first track is crossed with the length direction of the second track;

the driving assembly is movably connected with the dodging mirror assembly, and the driving assembly is matched with the dodging mirror assembly to drive the dodging mirror assembly to move in a manner of being parallel to the length direction of the first track and the plane of the length direction of the second track in a translation manner.

2. The light unifying apparatus according to claim 1, wherein the track assembly further comprises a drive bracket;

the light uniformizing assembly is movably connected with the first track, the light uniformizing assembly can move between a first position and a second position on the first track, and the first track is connected with the transmission bracket;

the transmission support is movably connected with the second track, the transmission support can move between a third position and a fourth position on the second track, and the second track is connected with the fixed support.

3. The light unifying apparatus according to claim 2, wherein the light unifying assembly comprises a light unifying element and a carrying support, the light unifying element being mounted on the carrying support;

the bearing support is provided with a first mounting through hole, the first mounting through hole is sleeved outside the first rail, and two ends of the first rail are fixedly connected with the transmission support;

the transmission support is provided with a second mounting through hole, the second mounting through hole is sleeved outside the second rail, and two ends of the second rail are fixedly connected with the fixed support.

4. The light unifying apparatus according to claim 1, wherein the driving assembly comprises a driving unit and a rotating structure;

the driving unit is connected with the rotating structure to drive the rotating structure to rotate by taking a first axis as a shaft;

the rotating structure is rotatably connected with the light homogenizing assembly, and a preset distance is reserved between the connecting position of the rotating structure and the light homogenizing assembly and the first axis.

5. The light homogenizing device according to claim 4, wherein the rotating structure comprises a first transmission gear and a first connecting portion located on the first transmission gear, the first transmission gear is movably connected with the fixed bracket, an axis of the first transmission gear is the first axis, and the first connecting portion is located at the connecting position and is rotatably connected with the light homogenizing assembly;

the driving unit comprises a driving motor and a second transmission gear, the driving motor is connected with the second transmission gear to drive the second transmission gear to rotate, and the second transmission gear is meshed with the first transmission gear.

6. The light homogenizing device according to claim 4, wherein the rotating structure comprises a first transmission gear and a first connecting portion located on the first transmission gear, the first transmission gear is movably connected with the fixed bracket, an axis of the first transmission gear is the first axis, and the first connecting portion is located at the connecting position and is rotatably connected with the light homogenizing assembly;

the drive unit comprises a drive motor and a transmission worm, the drive motor is connected with the transmission worm to drive the transmission worm to rotate, and the transmission worm is meshed with the first transmission gear.

7. The light unifying apparatus according to claim 2, wherein the fixed support comprises a mounting bracket having a light transmissive through hole, the track assembly being mounted within the light transmissive through hole.

8. The light unifying apparatus according to claim 2, wherein the fixing bracket comprises a mounting housing and a reflecting part;

the installation casing has the mounting groove, the track subassembly is installed in the mounting groove, the reflection part is located the tank bottom of mounting groove.

9. The light unifying apparatus according to claim 1, wherein the light unifying assembly comprises a light unifying element and a carrier support, the light unifying element comprising a light transmissive container and a diffusion medium;

the light-transmitting container is provided with a cavity, the diffusion medium is positioned in the cavity, and the light-transmitting container is fixedly connected with the bearing support.

10. A projection apparatus comprising a light source device, a light unifying device and an imaging device arranged along an optical path, wherein the light unifying device is as claimed in any one of claims 1 to 9.

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