CN218350695U - Illumination system and laser projection apparatus - Google Patents

Abstract

The utility model discloses a lighting system and laser projection equipment belongs to projection technical field. The lighting system includes: the laser spot dissipation device comprises a laser light source and a spot dissipation assembly, wherein the spot dissipation assembly comprises a driving part, a first transmission gear, a first mounting part and a first diffusion lens. The driving part, the first transmission gear and the first mounting part are matched to drive the first diffusion lens to rotate along a first preset direction, so that the first diffusion lens can continuously move to reduce the coherence of the laser beam passing through the first diffusion lens and reduce the speckle phenomenon of the laser beam; in addition, the edge of the first installation part is connected with the edge of the first diffusion lens, so that the driving part and the first installation part can be prevented from influencing the light transmission area of the first diffusion sheet, the area of a light receiving area in the first diffusion lens is increased, and the speckle dissipation effect of the speckle dissipation assembly on the laser beam can be further improved.

Description

Illumination system and laser projection apparatus

Technical Field

The utility model relates to a projection technology field, in particular to lighting system and laser projection equipment.

Background

The laser projection equipment is equipment capable of projecting an image picture, and can comprise an illumination system and an imaging device, wherein laser emitted by the illumination system has the characteristic of high coherence, and the high coherence of the laser can cause laser speckles to exist in the image picture, and the laser speckles can influence the quality of the displayed picture.

A lighting system comprises a laser light source, a driving motor and a light homogenizing wheel, wherein a rotating shaft of the driving motor is connected with the light homogenizing wheel to drive the light homogenizing wheel to rotate, so that the light homogenizing wheel can eliminate laser beams provided by the laser light source.

However, the joint between the rotating shaft of the driving motor and the dodging wheel in the existing lighting system cannot transmit light, so that the area of a light receiving area of the dodging wheel is small, and further the light emitting quality of the lighting system is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an illumination system and laser projection equipment. The technical scheme is as follows:

according to an aspect of the utility model, a lighting system is provided, lighting system includes:

the laser light source and the speckle dissipation assembly are sequentially arranged along the light path direction;

the laser light source is used for emitting a laser beam and irradiating the laser beam to the speckle dissipating assembly;

the speckle dissipating assembly comprises a driving part, a first mounting part and a first diffusion lens, wherein the driving part is connected with the first mounting part, and the first mounting part is connected with the edge of the first diffusion lens;

the first diffusion lens is used for receiving the laser beam, and the driving part is matched with the first installation part to drive the first diffusion lens to rotate along a first preset direction.

Optionally, the driving component includes a first driving motor, the first driving motor has a rotating shaft, the first mounting portion includes a connecting shaft and a lens frame, and the connecting shaft is respectively fixedly connected to the lens frame and the rotating shaft;

the first diffusion lens is installed in the lens frame, the axis of the rotating shaft is parallel to the mirror surface of the first diffusion lens, and the first driving motor is used for driving the first diffusion lens to take the axis of the first transmission gear as an axis and repeatedly deflect and swing at a preset angle.

Optionally, the speckle dissipating assembly further comprises a first fixed bracket, the drive component further comprises a first transmission gear and a second transmission gear;

the first transmission gear and the second transmission gear are both arranged on the first fixed support, and a rotating shaft of the first driving motor is connected with the second transmission gear and used for driving the second transmission gear to rotate;

the second transmission gear is meshed with the first transmission gear, the axis of the first transmission gear is intersected with the axis of the second transmission gear, and the first transmission gear is fixedly connected with the connecting shaft.

Optionally, the preset angle ranges from-1 degree to +1 degree.

Optionally, the driving part comprises a second driving motor, a first rack, a second rack and a third transmission gear, the length direction of the first rack is parallel to the length direction of the second rack, and the second driving motor is connected with at least one of the first rack and the second rack;

the third transmission gear is positioned between the first rack and the second rack and is respectively meshed with the first rack and the second rack, the third transmission gear is provided with a first through hole, and the first mounting part is positioned in the first through hole;

the first rack and the second rack are matched with the second driving motor to drive the first transmission gear to reciprocally roll along a first direction, and the first direction is parallel to the length direction of the first rack.

Optionally, the plaque dissipation assembly further comprises a second stationary bracket, the drive component further comprises a third drive gear;

the first rack and the second rack are both arranged on the second fixed support, the first rack is fixedly connected with the second fixed support, and the second rack is movably connected with the second fixed support;

the second rack is provided with a strip-shaped groove, the length direction of the strip-shaped groove is parallel to the length direction of the second rack, the side wall of the strip-shaped groove is provided with a plurality of tooth-shaped bulges which are distributed along the length direction of the second rack, the fourth transmission gear is meshed with the tooth-shaped bulges, and the rotating shaft of the second driving motor is connected with the fourth transmission gear and used for driving the fourth transmission gear to rotate.

Optionally, the speckle dissipating assembly comprises a second mounting part and a second diffusing lens, wherein the second diffusing lens is positioned on one side of the first diffusing lens away from the laser light source;

the driving part is connected with the second mounting part, the second mounting part is connected with the edge of the second diffusion lens, the second diffusion lens is used for receiving the laser beam provided by the first diffusion lens, and the driving part is matched with the second mounting part to drive the second diffusion lens to rotate along a second preset direction;

the first preset direction and the second preset direction are different.

Optionally, the shape of the first diffusion optic and the shape of the second diffusion optic comprise rectangular, trapezoidal, circular, or square.

Optionally, the illumination system further comprises a fly eye lens located between the laser light source and the speckle dissipating assembly;

the light-passing area of the speckle eliminating assembly is larger than that of the fly-eye lens.

According to another aspect of the present invention, there is provided a laser projection apparatus, said projection apparatus comprising the above-mentioned illumination system.

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

a lighting system is provided that includes a laser light source and an speckle dissipating assembly, wherein the speckle dissipating assembly includes a drive member, a first drive gear, a first mounting portion, and a first diffusing lens. The driving part, the first transmission gear and the first mounting part are matched to drive the first diffusion lens to rotate along a first preset direction, so that the first diffusion lens can continuously move to reduce the coherence of the laser beam passing through the first diffusion lens and reduce the speckle phenomenon of the laser beam; in addition, the first installation part is connected with the edge of the first diffusion lens, so that the driving part and the first installation part can be prevented from influencing the light transmission area of the first diffusion sheet, the area of a light receiving area in the first diffusion lens is increased, the speckle dissipation effect of the speckle dissipation assembly on laser beams can be improved, the problem that the light emitting quality of a lighting system in the related art is poor is solved, and the effect of improving the light emitting quality of the lighting system is realized.

Drawings

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

FIG. 1 is a schematic diagram of an illumination system;

FIG. 2 is a schematic view of the structure of the light-collecting region of the dodging wheel in the illumination system shown in FIG. 1;

fig. 3 is a schematic structural diagram of an illumination system provided in an embodiment of the present invention;

FIG. 4 is a schematic view of a speckle dissipating assembly of the lighting system of FIG. 3;

FIG. 5 is a schematic diagram of another speckle reduction assembly in the illumination system of FIG. 3;

fig. 6 is a schematic view illustrating a swing of a first diffusion lens according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a speckle dissipating assembly provided by an embodiment of the present invention;

FIG. 8 is a schematic view of the speckle-dissipating assembly shown in FIG. 7 as viewed in a direction parallel to the mirror surface of the first diffusion optic;

fig. 9 is a schematic structural diagram of another speckle reduction module provided in the embodiment of the present invention;

fig. 10 is a schematic structural diagram of another speckle reduction module provided in the embodiment of the present invention;

fig. 11 is a schematic structural diagram of another speckle reduction module provided in the embodiment of the present invention;

fig. 12 is a schematic structural diagram of another lighting system provided by the embodiment of the present invention;

fig. 13 is a schematic structural diagram of another speckle reduction module provided in the embodiment of the present invention;

fig. 14 is a schematic structural diagram of another speckle reduction assembly provided by the embodiment of the present invention;

fig. 15 is a schematic structural diagram of another lighting system provided by the embodiment of the present invention;

fig. 16 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present invention.

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 due to its advantages of high picture contrast, clear image, bright color, high brightness, and the like. The laser projection equipment is equipment capable of projecting an image picture, and can comprise an illumination system and an imaging device, wherein laser emitted by the illumination system has the characteristic of high coherence, and the high coherence of the laser can cause laser speckles to exist in the image picture, and the laser speckles can influence the quality of the displayed picture.

When the laser speckle refers to a coherent light source irradiating a rough object, scattered light generates interference in space due to constant phase difference, same light wave frequency and consistent vibration direction, some parts of the interference are long, and some parts of the interference are destructive, so that granular points with uneven light intensity distribution can be formed on a screen. These granular dots appear to the human eye as flickering dots, which are easily perceived as vertigo. It can be understood that the laser speckle may affect the display effect of the display image, and reduce the viewing experience of the user.

As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an illumination system 10, fig. 2 is a schematic structural diagram of a light receiving area 131 of a light distribution wheel 13 in the illumination system 10 shown in fig. 1, the illumination system 10 includes a laser light source 11, a driving motor 12 and the light distribution wheel 13, the laser light source 11 is used for emitting a laser beam s1, and the light distribution wheel 13 receives the laser beam s1 and emits the processed laser beam s1 out of the illumination system. The rotating shaft of the driving motor 12 is connected with the light homogenizing wheel 13 to drive the light homogenizing wheel 13 to rotate, so that the light homogenizing wheel 13 performs speckle eliminating processing on the laser beam provided by the laser light source 11.

The lighting system may further include a light guide 14, the light guide 14 may be a hollow light guide 14, the hollow light guide 14 is a tubular device formed by splicing four planar reflective sheets, and light is reflected multiple times inside the hollow light guide 14 to achieve a light-equalizing effect. The light guide 14 receives the laser light from the laser light source 11 and guides the received laser light to the light distribution wheel 13.

However, as can be seen from fig. 1 and 2, the light evening wheel 13 includes a central region and a peripheral region surrounding the central region, and the rotating shaft of the driving motor 12 is connected to the center of the light evening wheel 13 and drives the light evening wheel 13 to rotate, so that a part of the region of the light evening wheel 13 can receive the laser beam. In the using process of the light evening wheel 13, the light evening wheel 13 is provided with a light receiving area 131 and a non-light receiving area 131, the light receiving area and the area which can receive the laser beam emitted by the light guide 14 on the light evening wheel 13 are referred to as the area of the light evening wheel 13 except the light receiving area 131, and the size of the non-light receiving area 131 is larger than that of the light receiving area 131, so that the area of the light receiving area of the light evening wheel is smaller, and further the light emitting quality of the illumination system is poorer. Furthermore, the area of the dodging wheel 13 for receiving the laser beam is smaller in the dodging wheel, and the larger size of the non-light-collecting area 131 results in a larger size of the dodging wheel 13, and thus in a larger volume of the illumination system.

The embodiment of the utility model provides an illumination system and laser projection equipment can solve some problems that the above-mentioned provided.

Fig. 3 is a schematic structural diagram of an illumination system 20 according to an embodiment of the present invention, fig. 4 is a schematic structural diagram of one speckle reduction assembly 22 in the illumination system 20 shown in fig. 3, and fig. 5 is a schematic structural diagram of another speckle reduction assembly 22 in the illumination system 20 shown in fig. 3, please refer to fig. 3, fig. 4, and fig. 5. The illumination system 20 may include: a laser light source 21 and a speckle eliminating component 22 which are arranged in sequence along the direction of the light path.

The laser light source 21 is used for emitting a laser beam s2 and irradiating the laser beam s2 to the speckle reduction assembly 22. The plaque dissipation assembly 22 may include a driving member 221, a first transmission gear 222, a first mounting portion 223, and a first diffusion lens 224, the first transmission gear 222 being connected to the driving member 221 and the first mounting portion 223, respectively, and the first mounting portion 223 being connected to an edge of the first diffusion lens 224. The first diffusion mirror 224 is used to receive the laser beam s2, and the first mounting portion 223 may be connected to part or all of the first diffusion mirror 224 to connect the driving member 221, the first transmission gear 222 and the first diffusion mirror 224, so that the driving member 221 and the first diffusion mirror 224 do not coincide with the first diffusion mirror 224 in the second direction, which may be a direction perpendicular to the mirror surface of the first diffusion mirror 224. The driving part 221 can be prevented from blocking light to the first diffusion mirror 224, that is, the area of the light receiving area on the first diffusion mirror 224, which is the area capable of receiving the laser beam s2 on the first diffusion mirror 224, can be the same as the area of the mirror surface of the first diffusion mirror 224.

The driving member 221 and the first transmission gear 222 cooperate to drive the first diffusion lens 224 to rotate along the first predetermined direction. When the driving frequency of the driving part 221 reaches a preset frequency, the first diffusion mirror 224 may be vibrated to reduce the spatial coherence and temporal coherence of the laser beam s2 passing through the first diffusion mirror 224, so that laser speckle may be effectively eliminated. The edge connection of first installation department and first diffusion lens can avoid drive component and first installation department to influence the light transmission area of first diffusion piece to improve the area in the area of receiving the light in the first diffusion lens, and then can improve the dissipation spot effect of dissipation spot subassembly to laser beam.

To sum up, the embodiment of the utility model provides a lighting system including laser light source and dissipation spot subassembly, wherein, dissipation spot subassembly includes driver part, a drive gear, first installation department and first diffusion lens. The driving part, the first transmission gear and the first installation part are matched to drive the first diffusion lens to rotate along a first preset direction, so that the first diffusion lens can continuously move to reduce the coherence of laser beams passing through the first diffusion lens and reduce the speckle phenomenon of the laser beams; in addition, the first installation part is connected with the edge of the first diffusion lens, the driving part and the first installation part can be prevented from influencing the light transmission area of the first diffusion sheet, the area of a light receiving area in the first diffusion lens is increased, the speckle dissipation effect of the speckle dissipation assembly on laser beams can be improved, the problem that the light emitting quality of a lighting system in the related technology is poor is solved, and the effect of improving the light emitting quality of the lighting system is achieved.

It should be noted that, in the embodiment of the present invention, the reciprocal rotation of the first diffusion lens 224 along the first predetermined direction may be periodic, or may also be aperiodic, and the aperiodic random motion mode can increase the randomness of the phase change of the laser beam, and reduce the stable spot pattern caused by the periodic motion.

In addition, compare the regional area ratio of receiving the light beam in the even light wheel in the correlation technique, the embodiment of the utility model provides a can make the regional area ratio of receiving laser beam s2 great in the first diffusion lens 224, that is, can reduce the regional area of non-receipts light in the first diffusion lens 224, and then can reduce the size of first diffusion lens 224, can solve the great problem of the volume of the system in the correlation technique, realized the miniaturized effect of lighting system 20.

As shown in fig. 4, the rotation may include the first diffusion lens 224 rolling back and forth with a first predetermined direction as an axis, the first predetermined direction may be perpendicular to the lens surface of the first diffusion lens 224, and the driving part 221 may drive the first diffusion lens 224 to move continuously in a first plane along a predetermined motion track through the first mounting portion 223, where the first plane may be a plane parallel to the lens surface of the first diffusion lens 224. As shown in fig. 5, the rotation may include the first diffusion lens 224 oscillating in a first predetermined direction, and the driving member 221 can drive the first diffusion lens 224 to move continuously along a predetermined motion track through the first mounting portion 223.

The embodiment of the utility model provides an in lighting system 20 is when using, the laser beam light that laser light source 21 sent passes through first diffusion lens 224 in the speckle subassembly 22 that disappears, because first diffusion lens 224 can periodicity or aperiodic reciprocating motion for the laser beam of different moments is diffused to different positions by first diffusion lens 224, and because there is the vision residual characteristic in the people's eye, can make the superposition of laser beam of different moments, with the coherence that reduces laser beam, realize laser beam's dissipation spot and handle.

And, the embodiment of the utility model provides an in adopt gear drive's mode, can improve the dissipation spot subassembly 22 in the transmission precision between drive part 221 and the first installation department 223 for dissipation spot subassembly 22's reliability is higher, promotes dissipation spot subassembly 22's life.

Alternatively, as shown in fig. 5, the first mounting portion 223 may include a rotation shaft 2231 and a lens frame 232, the rotation shaft 2231 is fixedly connected to the lens frame 232, and the rotation shaft 2231 is further fixedly connected to the first transmission gear 222. The first diffusion lens 224 is installed in the lens frame 232, the axis of the first transmission gear 222 is parallel to the mirror surface of the first diffusion lens 224, the shape of the lens frame 232 may be a plurality of shapes such as a rectangle, a hexagon, etc., the shape of the first diffusion lens 224 may be fixedly connected with the inner side of the lens frame 232, for example, the inner side of the lens frame 232 may have an installation groove, and the first diffusion lens 224 may be embedded in the installation groove, so that the connection between the first diffusion lens 224 and the lens frame 232 is relatively stable.

The axis L1 of the first transmission gear 222 may be parallel to the mirror surface p2 of the first diffusion mirror 224, and the first transmission gear 222 is configured to drive the first diffusion mirror 224 to swing and deflect repeatedly by a predetermined angle with the axis L1 of the first transmission gear 222 as an axis.

Exemplarily, as shown in fig. 5, fig. 5 is a schematic structural diagram of another speckle reduction assembly 22 according to an embodiment of the present invention, the speckle reduction assembly 22 may further include a rail support 22a, the rail support 22a may have a U-shaped rail, an inner side of the rail support 22a may have a plurality of tooth-shaped protrusions, the first transmission gear 222 may be engaged with the plurality of tooth-shaped protrusions inside the rail support 22a, the driving member 221 may be rotatably connected to the first transmission gear 222 and drives the first transmission gear 222 to perform a linear reciprocating motion along a third direction, the third direction may be an arrangement direction of the plurality of tooth-shaped protrusions on the rail support 22a, and since the first transmission gear 222 is engaged with the plurality of tooth-shaped protrusions inside the rail support 22a, the first transmission gear 222 may repeatedly roll along the third direction to drive the first diffusion lens 224 to repeatedly swing around the axis L1 of the first transmission gear 222 and at a preset angle.

Alternatively, the driving part 221 may include a first driving motor and a second driving gear connected to each other, the second driving gear is engaged with the first driving gear 222, and the first driving motor drives the second driving gear to rotate reciprocally, so that the second driving gear drives the first driving gear 222 to rotate reciprocally, and further drives the first diffusion lens 224 to swing and deflect repeatedly by a predetermined angle with the axis L1 of the first driving gear 222 as an axis.

It should be noted that, in the embodiment of the present invention, the transmission between any two shafts in the space such as the parallel shaft, the intersecting shaft, and the staggered shaft can be realized through a plurality of gears, and the embodiment of the present invention does not limit this.

The first diffusion lens 224 can swing reciprocally in a clockwise direction and a counterclockwise direction within a preset angular range. Exemplarily, as shown in fig. 6, fig. 6 is a schematic view of the swing of the first diffusion lens 224 according to an embodiment of the present invention, the preset angle is an included angle between the mirror surface p2 of the first diffusion lens 224 and a first plane p1, the first plane p1 may be a plane where the mirror surface p2 of the first diffusion lens 224 is located when the first diffusion lens 224 does not rotate, and the included angle between the plane and the optical axis of the laser beam incident on the first diffusion lens 224 is 90 degrees.

When the preset angle (which may also be referred to as a rotation angle or a swing angle) is 0 degree, the laser beam may perpendicularly enter the first diffusion lens 224; when the first driving motor drives the first diffusion mirror 224 to rotate by a preset angle in the clockwise direction, an included angle between the mirror surface p2 of the first diffusion mirror 224 and the first plane p1 is + α, and an intersection point of the laser beam and the mirror surface p2 of the first diffusion mirror 224 is a point a 1; when the first driving motor drives the first diffusion mirror 224 to rotate in the counterclockwise direction by a preset angle, an included angle between the mirror surface p2 of the first diffusion mirror 224 and the first plane p1 is- α, and an intersection point of the laser beam and the mirror surface p2 of the first diffusion mirror 224 is an a2 point; the points a1 and a2 are distributed at different positions of the first diffusion mirror 224, and in the process of the swing of the first diffusion mirror 224, the position of the laser beam on the mirror surface p2 of the first diffusion mirror 224 is changed continuously, the random change probability of the phase of the laser beam on the spatial coherence is increased, the coherence of the laser beam is weakened, and the speckle eliminating effect of the first diffusion mirror 224 on the laser beam is improved.

Alternatively, the preset angle may range from-1 degree to +1 degree. That is, the first diffusion mirror 224 can rotate 1 degree in the clockwise direction, at this time, the included angle between the mirror surface of the first diffusion mirror 224 and the first plane is 1 degree, the first diffusion mirror 224 can rotate 1 degree in the counterclockwise direction, at this time, the included angle between the mirror surface of the first diffusion mirror 224 and the first plane is-1 degree. By rotating the first diffusion mirror 224 within the angle range, the laser beam passing through the first diffusion mirror 224 can be processed for speckle elimination, and the influence of the overlarge rotation angle of the first diffusion mirror 224 on the transmission direction of the laser beam can be avoided.

It should be noted that, in the embodiment, the mirror surface of the first diffusion mirror 224 may include a light incident surface and a light emitting surface, where the light incident surface refers to a surface of the first diffusion mirror 224 for receiving the laser beam, and the light emitting surface refers to a surface of the first diffusion mirror 224 for emitting the laser beam. The first diffusion lens 224 may receive the laser beam emitted from the laser light source 21 through the light incident surface, perform speckle elimination on the received laser beam, and emit the processed laser beam out of the light emergent surface to form the dodging mirror assembly. This go out the plain noodles and go into the plain noodles can be for relative and two parallel faces, the embodiment of the utility model provides an in with first diffusion lens 224 towards laser source 21 a mirror surface be called into the plain noodles, a mirror surface that deviates from laser source 21 is called out the plain noodles, does 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 plain noodles and go into the position of plain noodles and can trade, the embodiment of the utility model provides a do not prescribe a limit to this.

Fig. 7 is a schematic structural diagram of a speckle dissipating assembly 22 according to an embodiment of the present invention, and fig. 8 is a schematic structural diagram of the speckle dissipating assembly 22 shown in fig. 7, which is viewed in a direction parallel to the mirror surface of the first diffusing lens 224, please refer to fig. 7 and 8. Optionally, the speckle dissipating assembly 22 may further comprise a first fixed bracket (not shown), and the driving part 221 may comprise a first driving motor 2211 and a second driving gear 2212.

The first transmission gear 222 and the second transmission gear 2212 can be both mounted on the first fixing bracket, and the rotating shaft of the first driving motor 2211 is connected with the second transmission gear 2212 for driving the second transmission gear 2212 to rotate. The second transmission gear 2212 meshes with the first transmission gear 222, and the axis L1 of the first transmission gear 222 intersects with the axis of the second transmission gear 2212. The first transmission gear 222 is fixedly connected to the rotating shaft 2231, and the rotating shaft 2231 may be rotatably connected to the fixed bracket. Thus, the first driving motor 2211 can drive the second transmission gear 2212 to rotate in a reciprocating manner, the second transmission gear 2212 drives the first transmission gear 222 to rotate in a reciprocating manner, the first transmission gear 222 drives the rotation shaft 2231 to rotate around the axis L1 of the first transmission gear 222, and further drives the first diffusion lens 224 to swing around the axis L1 of the first transmission gear 222 in a repeated manner at a preset angle.

As shown in fig. 8, first drive gear 222 and second drive gear 2212 can each be a bevel gear, also known as a bevel gear, which can be used for transmission between intersecting shafts. The bevel gear can change the transmission direction, and the included angle between the axis of the first transmission gear 222 and the axis of the second transmission gear 2212 can be 90 degrees or less than 90 degrees. In this way, by providing a bevel gear transmission, the position of the first driving motor 2211 relative to the first diffusion lens 224 and other structures in the lighting system 20 can be flexibly adjusted, and the applicability of the speckle dissipation assembly 22 can be improved.

In the embodiment of the present invention, the lens frame 232 and the rotation shaft 2231 are not limited to the above-described structure, as long as the first transmission gear 222 and the first diffusion lens 224 can be connected.

Fig. 9 is a schematic structural diagram of another speckle reduction assembly 22 provided by the embodiment of the present invention, and fig. 10 is a schematic structural diagram of another speckle reduction assembly 22 provided by the embodiment of the present invention, please refer to fig. 9 and fig. 10. Alternatively, the driving part 221 may include a second driving motor (not shown), a first rack 2213, and a second rack 2214, a length direction of the first rack 2213 may be parallel to a length direction of the second rack 2214, and the second driving motor may be connected to at least one of the first rack 2213 and the second rack 2214.

The first transmission gear 222 may be located between the first and second racks 2213 and 2214, and the first gear may be engaged with the first and second racks 2213 and 2214, respectively, the first transmission gear 222 may have a first through hole c1, the first mounting portion 223 may be located in the first through hole c1, and the shape of the first through hole c1 may include a circle or a square to fit the first diffusion lenses 224 of different shapes. The first mounting portion 223 may be fixedly connected with the inner side of the first through hole c1, or the first mounting portion 223 may be the inner wall of the first through hole c1, the first diffusion lens 224 may be fixed in the first through hole c1 in an adhesive manner, and the first diffusion lens 224 may also be fixed in the first through hole c1 in other manners, for example, a screw or a snap fit, etc., which is not limited thereto by the embodiment of the present invention.

The first and second racks 2213 and 2214 are matched with the second driving motor to drive the first transmission gear 222 to roll back and forth along the first direction f1, and the first direction f1 is parallel to the length direction of the first rack 2213. Thus, the first transmission gear 222 can drive the first diffusion lens 224 to rotate reciprocally along the circumferential direction of the first transmission gear, and at the same time, can drive the first diffusion lens 224 to do reciprocating linear motion along the first direction.

The length direction of the first rack 2213 is the extension direction of the first rack 2213, the structure mounted on the first rack 2213 is movable in the length direction of the first rack 2213, the length direction of the second rack 2214 is the extension direction of the second rack 2214, and the structure mounted on the second rack 2214 is movable in the length direction of the second rack 2214, that is, the extension direction of the first rack 2213 is the same as the extension direction of the second rack 2214.

The embodiment of the utility model provides an in first diffusion lens 224 can have a plurality of moving direction, can be so that shine the facula to the laser beam of first diffusion lens 224 and realize eliminating the speckle processing through first diffusion lens 224, compare in the diffusion lens of correlation technique in static, even aureola only can be through rotating in perhaps the correlation technique, carry out the ascending dissipation spot processing of an orientation of rotation of even aureola along to the facula, can promote the homogenization effect of dissipation spot subassembly 22, and then can improve display device's picture homogeneity and display effect.

The first and second racks 2213 and 2214 may be a special gear with teeth distributed on a bar-like structure. The first and second racks 2213 and 2214 may have tooth grooves, which are concave portions between the teeth of the racks and between the teeth. The space between adjacent teeth on the first drive gear 222 may be referred to as a tooth slot or tooth space. The teeth of the first and second racks 2213 and 2214 can be sized to match the teeth slots of the first drive gear 222, and the teeth slots of the first and second racks 2213 and 2214 can be sized to match the teeth of the first drive gear 222.

Both ends of the first and second racks 2213 and 2214 may have a limit protrusion for limiting the first transmission gear 222 in a length direction parallel to the first rack 2213. The first transmission gear 222 is meshed with the first rack 2213 and the second rack 2214 to perform transmission, and the transmission mode has the characteristics of large application range, high transmission efficiency, long service life, stable transmission process, high reliability and the like. The engagement of the first transmission gear 222 with the first and second racks 2213 and 2214 converts the translational motion of the first and second racks 2213 and 2214 into the motion of moving the first transmission gear 222 in the extending direction of the first rack 2213 and the rotational motion of the first transmission gear 222.

Fig. 11 is a schematic structural diagram of another speckle reduction module 22 according to an embodiment of the present invention, please refer to fig. 11. Alternatively, the plaque dissipation assembly 22 may further include a second fixing bracket (not shown in the drawings), and the driving part 221 may further include a third transmission gear. First rack 2213 and second rack 2214 can all be installed on the second fixed bolster, and first rack 2213 can with second fixed bolster fixed connection, first rack 2213 can with second fixed bolster bolted connection, second rack 2214 can with second fixed bolster swing joint.

The second rack 2214 is provided with a strip-shaped groove K1, the length direction f2 of the strip-shaped groove K1 is parallel to the length direction of the second rack 2214, the side wall of the strip-shaped groove K1 is provided with a plurality of tooth-shaped protrusions arranged along the length direction of the second rack 2214, the third transmission gear is meshed with the tooth-shaped protrusions, and a rotating shaft of the second driving motor 2215 is connected with a third transmission gear (not shown in the figure) for driving the third transmission gear to rotate.

As shown in fig. 11, the second driving motor 2215 may be mounted on the second fixing bracket, the rotating shaft of the second driving motor 2215 may be connected to a third transmission gear for driving the third transmission gear to rotate, and the third transmission gear may be inserted into the strip-shaped groove of the second strip 2214. Second driving motor 2215 can carry out fixed connection through the mode of screw connection with the second fixed bolster, also can carry out fixed connection through other modes such as welding, the embodiment of the utility model provides a do not limit to this. The embodiment of the present invention provides an embodiment, the second driving motor 2215 can drive the third driving gear to rotate, and the second rack 2214 can be driven by the third driving gear to make linear reciprocating motion in the length direction of the second rack 2214, so as to control the first driving gear 222 to move along the extending direction of the first rack 2213.

Fig. 12 is a schematic structural diagram of another lighting system 20 according to an embodiment of the present invention, please refer to fig. 12. Alternatively, the speckle dissipating assembly 22 may include a fourth transmission gear, a second mounting portion, and a second diffusing lens 225, and the second diffusing lens 225 may be located on a side of the first diffusing lens 224 away from the laser light source 21. It should be noted that, fig. 13 does not show the specific structure of the fourth transmission gear and the second installation portion, in the embodiment of the present invention, the structure of the fourth transmission gear may refer to the structure of the first transmission gear, and the structure of the second installation portion may refer to the structure of the first installation portion. The driving member may be connected with the fourth transmission gear.

The second mounting portion may be fixedly connected to the fourth transmission gear, the second diffusion lens 225 may be mounted in the second mounting portion, the second diffusion lens 225 may be configured to receive the laser beam s2 provided by the first diffusion lens 224, and the fourth rotation gear may be configured to drive the second diffusion lens 225 to rotate along a second preset direction; the first and second preset directions may be different.

Since the first diffusion lens 224 and the second diffusion lens 225 are sequentially disposed in front of and behind each other, the laser beam s2 emitted from the laser source 21 can sequentially pass through the two diffusion lenses, and the homogenization degree of the laser beam s2 can be improved by diffusing twice.

The first diffusion mirror 224 and the second diffusion mirror 225 are driven by the driving part 221 to move simultaneously and respectively, so that the laser beam s2 sequentially passes through the two diffusion mirrors in the moving state, and compared with the diffusion mirror which is arranged statically, the moving diffusion mirror can change the spatial phase and can also enable the laser beam s2 to generate a plurality of random phase patterns, thereby being beneficial to improving the speckle elimination effect of the laser beam s 2.

In addition, in this embodiment of the application, the movement directions of the first diffusion mirror 224 and the second diffusion mirror 225 are different, and since the two diffusion mirrors change the phases of the laser beam s2 differently, the correlation degree between the phases of the laser beam s2 sequentially passing through the two diffusion mirrors is small, so that the speckle effect is reduced, and the speckle reduction effect of the speckle reduction component 22 on the laser beam s2 is improved.

The first diffusion lens 224 and the second diffusion lens 225 may be circular, rectangular, or oval, as long as the laser beam s2 emitted from the laser source 21 can be received, and the present invention is not limited thereto.

Alternatively, the first diffusion mirror 224 and the second diffusion mirror 225 may have different movement forms, for example, the first diffusion mirror 224 is mounted in the first mounting portion 223 as shown in fig. 7, the first diffusion mirror 224 can repeatedly swing around the axis of the first transmission gear 222, the second diffusion mirror 225 can be mounted in the first mounting portion 223 as shown in fig. 11, and the second diffusion mirror 225 can reciprocate around the axis of the first transmission gear 222 and can also linearly reciprocate in the length direction of the first rack 2213. Thus, the combination of the two diffusing lenses with different movement forms can improve the speckle eliminating effect of the speckle eliminating component 22 on the laser beam.

Further, the motion laws of the first diffusion lens 224 and the second diffusion lens 225 may be different, and the above-mentioned reciprocating motion of the two diffusion lenses moving along the two directions may be a uniform motion, or may be a non-uniform motion. And the reciprocating motion of the two diffusing lenses may be one of periodic or aperiodic.

Optionally, the shape of the first diffusion lens 224 and the shape of the second diffusion lens 225 include rectangular, trapezoidal, circular, or square. First installation department 223 and first diffusion lens 224 can be through multiple connected mode fixed connection such as adhesive bonding, bolted connection and buckle connection, and on the same way, second installation department and second diffusion lens 225 can be through multiple connected mode fixed connection such as adhesive bonding, bolted connection and buckle connection, can be according to the connected mode of difference, and the flexibility sets up the embodiment of the utility model provides a shape of first diffusion lens 224 and the shape of second diffusion lens 225.

The first diffusion lens 224 and the second diffusion lens 225 may both be transmissive speckle-eliminating devices, and the configuration of the transmissive speckle-eliminating devices in the optical path of the illumination system 20 may simplify the optical path structure of the illumination system 20.

Fig. 13 is a schematic structural diagram of another speckle reduction assembly 22 provided by the embodiment of the present invention, and fig. 14 is a schematic structural diagram of another speckle reduction assembly 22 provided by the embodiment of the present invention, please refer to fig. 13 and fig. 14. The speckle reduction assembly 22 may further include a second transmission gear 2212, fig. 13 shows a structure in which transmission is performed between the first transmission gear 222 and the second transmission gear 2212 through a hypoid gear, and fig. 14 shows a structure in which transmission is performed between the first transmission gear 222 and the second transmission gear 2212 through a worm and gear. The embodiment of the utility model provides a gear drive structure among dissipation spot subassembly 22, simple structure and size are less, receive the light area great, have better suitability.

The embodiment of the utility model provides a gear drive mode among dissipation spot subassembly 22 can also include straight gear drive, parallel shaft helical gear transmission, worm gear transmission and cylindrical gear transmission etc..

Fig. 15 is a schematic structural diagram of another lighting system 20 according to an embodiment of the present invention, please refer to fig. 15. Optionally, the illumination system 20 may further include a fly-eye lens 226, the fly-eye lens 226 may be located between the laser light source 21 and the speckle dissipating assembly 22, and the light-passing area of the speckle dissipating assembly 22 is larger than the light-passing area of the fly-eye lens 226.

The fly-eye lens 226 can be used for realizing the light-homogenizing and shaping of the laser beam s2, and the fly-eye lens 226 can receive the laser beam s2 emitted by the laser source 21, homogenize and shape the laser beam s2, and then transmit the homogenized and shaped laser beam s2 to the speckle reduction assembly 22, so that speckles in an image formed by the laser beam s2 can be more uniform. Also, the size of the fly-eye lens 226 in the direction parallel to the optical axis of the laser beam s2 is smaller than that of the light guide in the related art, and the volume of the illumination system 20 can be further reduced.

To sum up, the embodiment of the utility model provides a lighting system including laser light source and dissipation spot subassembly, wherein, dissipation spot subassembly includes driving part, first transmission gear, first installation department and first diffusion lens. The driving part, the first transmission gear and the first installation part are matched to drive the first diffusion lens to rotate along a first preset direction, so that the first diffusion lens can continuously move to reduce the coherence of laser beams passing through the first diffusion lens and reduce the speckle phenomenon of the laser beams; in addition, the first installation part is connected with the edge of the first diffusion lens, so that the driving part and the first installation part can be prevented from influencing the light transmission area of the first diffusion sheet, the area of a light receiving area in the first diffusion lens is increased, the speckle dissipation effect of the speckle dissipation assembly on laser beams can be improved, the problem that the light emitting quality of a lighting system in the related art is poor is solved, and the effect of improving the light emitting quality of the lighting system is realized.

Fig. 16 is a schematic structural diagram of a laser projection apparatus according to an embodiment of the present invention, please refer to fig. 16. Projection device 30 may include an illumination system and an imaging system arranged along an optical path, the illumination system being the illumination system of any of the embodiments described above.

The illumination system comprises a laser source 311, a light combining mirror 312, a first lens 313, a first reflecting mirror 314, a second lens 315, a fly-eye lens 316 and a speckle eliminating component 317, which are arranged along a light path, wherein the laser source 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 s2 of multiple colors to the light combining mirror 312, the light combining mirror 312 combines the laser beams s2 of multiple colors and irradiates the laser beams s2 to the first lens 313, the first lens 313 is used for converging the laser beams s2, the first lens 313 irradiates the converged laser beams s2 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 a transmission direction of the laser beams s2, the first reflecting mirror 314 reflects the laser beams s2 to the second lens 315, the second lens 315 receives the laser beams s2 and irradiates the laser beams s2 converged again to the light homogenizing device 32, and thus, the sizes of light spots of the laser beams s2 irradiating the fly to the fly eye lens 316 and the evanescent spot assembly 317 can be smaller, and the volumes of the fly eye lens 316 and the evanescent spot assembly 317 can be smaller.

The imaging system 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 speckle eliminating assembly 317 receives the laser beam s2, performs speckle eliminating processing on the laser beam s2, and irradiates the processed laser beam s2 to the third lens 331, the third lens 331 irradiates the converged laser beam s2 to the second reflecting mirror 332, and the second reflecting mirror 332 is also used for changing the transmission direction of the laser beam s2, so that components in the projection setting are compact, and the projection setting is miniaturized; the second reflecting mirror 332 reflects the laser beam s2 to the fourth lens 333, the fourth lens 333 receives the laser beam s2 and irradiates the converged laser beam s2 to the TIR prism 334, the TIR prism 334 is used for guiding at least part of the laser beam s2 to the digital micromirror device, and the digital micromirror device can process at least part of the laser beam s2 and guide the processed beam to the projection lens, thereby realizing an imaging function.

To sum up, the embodiment of the utility model provides a projection equipment. A lighting system includes a laser light source and a speckle dissipating assembly, wherein the speckle dissipating assembly includes a drive member, a first drive gear, a first mounting portion, and a first diffusing lens. The driving part, the first transmission gear and the first mounting part are matched to drive the first diffusion lens to rotate along a first preset direction, so that the first diffusion lens can continuously move to reduce the coherence of the laser beam passing through the first diffusion lens and reduce the speckle phenomenon of the laser beam; in addition, the first installation part is connected with the edge of the first diffusion lens, so that the driving part and the first installation part can be prevented from influencing the light transmission area of the first diffusion sheet, the area of a light receiving area in the first diffusion lens is increased, the speckle dissipation effect of the speckle dissipation assembly on laser beams can be improved, the problem that the light emitting quality of a lighting system in the related art is poor is solved, and the effect of improving the light emitting quality of the lighting system is realized.

In the present application, the terms "first," "second," "third," and "fourth" 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 expressly limited 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. An illumination system, characterized in that the illumination system comprises: the laser light source and the spot dissipation assembly are sequentially arranged along the direction of a light path;

the laser light source is used for emitting a laser beam and irradiating the laser beam to the speckle dissipating assembly;

the speckle dissipation assembly comprises a driving part, a first transmission gear, a first mounting part and a first diffusion lens, wherein the first transmission gear is respectively connected with the driving part and the first mounting part, and the first mounting part is connected with the edge of the first diffusion lens;

the first diffusion lens is used for receiving the laser beams, and the driving part is matched with the first transmission gear to drive the first diffusion lens to rotate along a first preset direction.

2. The lighting system, as set forth in claim 1, wherein the first mounting portion comprises a rotational shaft and a lens frame, the rotational shaft fixedly coupled to the lens frame, the rotational shaft further fixedly coupled to the first drive gear;

the first diffusion lens is installed in the lens frame, the axis of the first transmission gear is parallel to the mirror surface of the first diffusion lens, and the first transmission gear is used for driving the first diffusion lens to take the axis of the first transmission gear as an axis and repeatedly deflect and swing at a preset angle.

3. The illumination system of claim 2, wherein the speckle reduction assembly further comprises a first fixed bracket, the drive component comprising a first drive motor and a second drive gear;

the first transmission gear and the second transmission gear are both arranged on the first fixed support, and a rotating shaft of the first driving motor is connected with the second transmission gear and used for driving the second transmission gear to rotate;

the second transmission gear is meshed with the first transmission gear, and the axis of the first transmission gear is intersected with the axis of the second transmission gear.

4. The lighting system according to claim 2, wherein the preset angle ranges from-1 degree to +1 degree.

5. The lighting system, as set forth in claim 1, wherein the driving part comprises a second driving motor, a first rack and a second rack, a length direction of the first rack and a length direction of the second rack being parallel, the second driving motor being connected to at least one of the first rack and the second rack;

the first transmission gear is positioned between the first rack and the second rack and is respectively meshed with the first rack and the second rack, the first transmission gear is provided with a first through hole, and the first mounting part is positioned in the first through hole;

the first rack and the second rack are matched with the second driving motor to drive the first transmission gear to reciprocally roll along a first direction, and the first direction is parallel to the length direction of the first rack.

6. The illumination system of claim 5, wherein the speckle reduction assembly further comprises a second fixed support, the drive component further comprises a third drive gear;

the first rack and the second rack are both arranged on the second fixed bracket, the first rack is fixedly connected with the second fixed bracket, and the second rack is movably connected with the second fixed bracket;

the second rack is provided with a strip-shaped groove, the length direction of the strip-shaped groove is parallel to the length direction of the second rack, the side wall of the strip-shaped groove is provided with a plurality of tooth-shaped bulges which are distributed along the length direction of the second rack, the third transmission gear is meshed with the tooth-shaped bulges, and the rotating shaft of the second driving motor is connected with the third transmission gear and used for driving the third transmission gear to rotate.

7. The illumination system of claim 1, wherein the speckle reduction assembly comprises a fourth transmission gear, a second mounting portion, and a second diffusive optic on a side of the first diffusive optic remote from the laser light source;

the second mounting part is fixedly connected with the fourth transmission gear, the second mounting part is connected with the edge of the second diffusion lens, the second diffusion lens is used for receiving the laser beam provided by the first diffusion lens, and the driving part is matched with the second mounting part to drive the second diffusion lens to rotate along a second preset direction;

the first preset direction and the second preset direction are different.

8. The lighting system, as set forth in claim 7, wherein the shape of the first diffuser lens and the shape of the second diffuser lens comprise a rectangle, a trapezoid, a circle, or a square.

9. The lighting system, as set forth in claim 1, further comprising a fly-eye lens positioned between the laser light source and the speckle dissipating assembly;

the light-passing area of the speckle eliminating assembly is larger than that of the fly-eye lens.

10. A laser projection device, characterized in that the projection device comprises an illumination system as claimed in any one of claims 1 to 9.

Images