CN113885284B

CN113885284B - Light source assembly and projection equipment

Info

Publication number: CN113885284B
Application number: CN202111137261.4A
Authority: CN
Inventors: 李巍; 顾晓强
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-01-31
Anticipated expiration: 2041-09-27
Also published as: CN113885284A

Abstract

The application provides a light source subassembly and projection equipment, the light source subassembly includes laser generation unit, microlens array, closes light subassembly, adjusts luminance the unit. The micro lens array is arranged on one side of the laser generating unit and is used for homogenizing a plurality of laser beams; the light combination component is arranged on one side of the micro lens array and comprises a light combination reflection area and a transmission area which are adjacent; the dimming unit is arranged on one side of the light combination assembly, which is far away from the laser generation unit, and comprises a first lens group and a fluorescent wheel; the transmission area is used for allowing a plurality of laser beams to pass through, the first lens group is used for converging the laser beams onto the fluorescence wheel, a plurality of harmonic light beams are formed through excitation, the harmonic light beams correspondingly irradiate the light combination reflection areas one by one, and the light combination reflection areas reflect the harmonic light beams to form light sources. This application has reduced the restriction to the laser generating unit light-emitting angle through adopting the microlens array, improves the formation quality of facula to light loss has been reduced.

Description

Light source assembly and projection equipment

Technical Field

The application relates to the technical field of projection, in particular to a light source assembly and projection equipment.

Background

Currently, projection devices are widely used in various application scenarios such as home, business, education, and advertisement. Within the projection device is a light source assembly for generating a light source.

The light source component comprises a laser, a light path conversion component and a fluorescent wheel. Light emitted by the laser is processed by the light path conversion component to form light spots with proper sizes, and the light spots are emitted to the fluorescence wheel to excite and generate various excitation lights. In the related art, the laser emitted by the laser is dense, so that the size of a light spot formed on the fluorescent wheel is difficult to adjust by the light path conversion component, the excitation effect of a fluorescent material on the fluorescent wheel is influenced, and the quality of a generated light source is poor.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

One objective of the present application is to provide a light source assembly to improve the quality of the generated light source.

In order to solve the technical problem, the following technical scheme is adopted in the application:

according to one aspect of the present application, there is provided a light source assembly comprising:

a laser generating unit for generating a plurality of laser beams;

the micro lens array is arranged on one side of the laser generating unit and is used for homogenizing the multiple laser beams;

the light combination component is arranged on one side of the micro lens array and comprises a light combination reflection area and a transmission area which are adjacent;

the dimming unit is arranged on one side of the light combination component, which is far away from the laser generating unit, and comprises a first lens group and a fluorescent wheel; the transmission area is used for allowing a plurality of laser beams to pass through, the first lens group is used for converging the laser beams onto the fluorescent wheel, the laser beams are excited to form a plurality of harmonic light beams, and the harmonic light beams are emitted to the light combination reflection areas and are reflected by the light combination reflection areas to form a light source.

According to another aspect of the present application, there is also provided a light source assembly comprising:

a laser generating unit for generating a plurality of laser beams;

the dimming unit is arranged on one side of the light combination component and comprises a first lens group and a fluorescent wheel; the light combining and reflecting area is used for reflecting a plurality of laser beams to the first lens group, the first lens group converges the laser beams to the fluorescent wheel so as to excite the laser beams to form a plurality of harmonic light beams, the harmonic light beams are emitted to the transmitting area and form a light source after being filtered by the transmitting area.

According to an embodiment of the present application, the multiple laser beams are incident on the microlens array to form multiple spots; each light spot comprises a central area and an edge area, the micro lens array comprises a plurality of first micro lens units and a plurality of second micro lens units, the central area of the light spot covers the plurality of first micro lens units, and the edge area of the light spot covers the plurality of second micro lens units; the light homogenizing capability of the first micro lens unit is higher than that of the second micro lens unit.

According to an embodiment of the present application, a size of the first microlens unit is smaller than a size of the second microlens unit.

According to an embodiment of the present application, the first microlens unit gradually increases in size from the center of the light spot toward the edge.

According to an embodiment of the present application, the light combining component includes a light combining mirror, the light combining mirror includes a plurality of light combining reflective regions and a plurality of transmissive regions, the light combining reflective regions and the transmissive regions are alternately arranged, and each transmissive region corresponds to a laser beam to pass through, so as to irradiate to the light adjusting unit.

According to an embodiment of the present application, the light combining mirror sequentially includes a first light combining reflection region, a first transmission region, a second light combining reflection region, and a second transmission region along a length direction thereof;

the first light combining reflection area and the second transmission area are correspondingly identical in shape and size and are symmetrical along the longitudinal axis of the light combining mirror; the second light combining reflection area and the first transmission area are correspondingly identical in shape and size and are symmetrical along the longitudinal axis of the light combining mirror.

According to an embodiment of the present application, the laser generating unit includes a laser and two reflecting mirrors, and the two reflecting mirrors are disposed between the laser and the light combining mirror; the laser is used for emitting laser, and the two reflector groups are respectively used for dividing the laser into two beams which are respectively reflected to the first transmission area and the second transmission area.

According to an embodiment of the application, the light source subassembly still includes second lens and light pipe, the second lens and the light pipe is located in proper order close one side of light subassembly, the second lens be used for with it converges to close the light that the light reflection zone reflects to the entry of light pipe.

The application also provides projection equipment which comprises an optical machine, a lens and the light source component;

the light source assembly is used for converting monochromatic laser into three-primary-color light according to time sequence and inputting the three-primary-color light into the optical machine; the light machine modulates the time sequence tricolor light and outputs the color light to the lens; the lens converges and images modulated light input from the optical machine and projects the modulated light.

In the application, the single-side micro-lens array is adopted to homogenize the laser beam emitted by the laser generating unit, when the laser beam passes through the single-side micro-lens array, the light beam can be diverged according to the optical angle of the micro-lens array, and finally, the light beam is focused by the first lens array to form a uniform light spot with a set size to be emitted onto the fluorescence wheel. The laser beam after the light uniformization is more divergent and can be further processed by the first lens array, so that light spots with proper sizes are finally formed by projection on the fluorescent wheel, and the excitation effect of fluorescent materials in the fluorescent wheel is improved, so that the quality of the generated light source is improved.

In addition, the single-sided micro-lens array has less limitation on incident light angles, and can receive and process large-angle incident light (corresponding to the light-emitting angle of the laser generating unit), so that the light utilization rate is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic view of a light source assembly according to an example embodiment.

Fig. 2 is a schematic diagram illustrating a spot displayed on an array of microlenses, according to an exemplary embodiment.

Fig. 3 is a schematic view of a light source assembly according to another exemplary embodiment.

FIG. 4 is a schematic diagram illustrating a fluorescent wheel construction according to an example embodiment.

The reference numerals are illustrated below: 1. a laser generating unit; 11. a laser; 12. a reflector group; 121. a first plane mirror; 122. a second plane mirror; 123. a third plane mirror; 124. a fourth plane mirror.

2. A light combining mirror; 21. a light-combining reflection region; 22. a transmissive region; 23. a first light-combined reflection area; 24. a first transmissive region; 25. a second light-combining reflection area; 26. a second transmissive region; 3. a micro-lens array; 31. a first microlens unit; 32. a second lens unit; 7. light spots;

41. a first lens group; 42. a fluorescent wheel; 421. a substrate; 422. a reflective region; 423. a light conversion region; 51. a second lens group; 61. a second lens; 62. a light pipe.

Detailed Description

While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.

Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the application and does not imply that every embodiment of the application must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement of the various elements of the present application not absolutely, but relatively. These illustrations are appropriate when the elements are in the positions shown in the figures. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

The preferred embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the present specification.

The application provides a light source component and projection equipment, wherein the projection equipment comprises a light machine, a lens and a light source component; the light source component is used for converting the monochromatic laser into three primary colors according to time sequence and inputting the three primary colors into the optical machine; the optical machine modulates the sequential tricolor light and outputs the color light to the lens; the lens collects and images modulated light input from the optical machine and projects the modulated light.

Referring to fig. 1, fig. 1 is a schematic view illustrating a light source assembly according to an exemplary embodiment. In one embodiment, the light source assembly includes a laser generating unit 1, a microlens array 3, a light combining assembly, and a dimming unit. The laser generating unit 1 is used for generating a plurality of laser beams; the micro lens array 3 is arranged on one side of the laser generating unit 1, and a plurality of laser beams are irradiated on the micro lens array 3 to form a plurality of light spots 7. The light combination component is arranged on one side of the micro lens array 3; the dimming unit is arranged on one side of the light combination assembly, which is far away from the laser generating unit, and comprises a first lens group 41 and a fluorescent wheel 42; the first lens group 41 converges the laser emitted from the light converging assembly onto the fluorescent wheel, so as to further excite the fluorescent material on the fluorescent wheel to generate the excited light, and the excited light converges to form the harmonic light. The blended light is emitted to the light combining component to form the light source.

In this embodiment, the laser generating unit 1 may include a laser 11, and the laser 11 is used to generate laser light. The laser 11 may emit only one laser beam or may be configured to emit a plurality of laser beams. In a specific embodiment, the laser 11 includes 14 laser sources, and the 14 laser sources are arranged in a 7*2 array, so that the laser 11 can emit 14 laser beams.

The laser generating unit 1 may further include a second lens group 51, and the second lens group 51 is located between the reflector group and the light combining mirror 2 to perform beam shrinking arrangement on the two beams of light reflected by the reflector group.

In the present embodiment, the single-sided microlens array 3 is used to homogenize the light emitted from the second lens group 51. The principle of the single-sided micro-lens array 3 light uniformization is that a laser beam passes through the single-sided micro-lens array 3, the laser beam is split by the micro-lens array 3, each beam takes the micro-lens array 3 as a unit, and a laser spot 7 is split into divergent beams with different angles of 0-theta degrees, wherein the maximum angle theta is formed at a fluorescent wheel 42 through a collimating mirror matrix, and a spot with Y = f tan theta is formed at the fluorescent wheel 42. If the angles of the microlens array 3 in the X and Y directions (corresponding to the length and width directions of the microlens array 3) are different, and correspond to θ X and θ Y, a light spot of Lx = f × tan θ X and Ly = f × tan θ Y is formed at the fluorescent wheel 42. Lx is the length of the light spot along the X direction, and Ly is the length of the light spot along the Y direction.

In this embodiment, the microlens array 3 is disposed on a side of the second lens group 51 away from the laser 11, the microlens array 3 may be a single-sided microlens array 3, the microlens array 3 has a plurality of microlens units distributed in an array, the single-sided microlens array 3 mainly serves to split the light beam and form a multi-angle light beam of the array, and the size of the light spot 7 is determined by an angle divided by the single-sided microlens array 3.

As before, the second lens group 51 includes one convex lens and one concave lens. In the related art, due to the spherical aberration relationship between the convex lens and the concave lens, the intensity of the light spot 7 formed on the fly-eye lens is not uniform, thereby affecting the light uniformizing effect.

The laser 11 can form 14 light spots 7 on the microlens array 3 unit, and the light spots 7 appearing on the microlens array 3 are not regular circles due to the influence of the spherical aberration of the second lens group 51 (the spherical aberration is caused by the difference in the convergence power of the light by the lens center region and the edge region), and the energy distribution center is high and the edge is low because the light spots 7 are gaussian beams.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a light spot displayed on an array of microlenses according to an exemplary embodiment. In one embodiment, each light spot 7 includes a central region and an edge region, the microlens array 3 includes a plurality of first microlens units 31 and a plurality of second microlens units 32, the first microlens units 31 are located in the central region, and the second microlens units 32 are located in the edge region corresponding to the light spot 7; wherein, the light-homogenizing power of the first microlens unit 31 is higher than that of the second microlens unit 32.

A corresponding number of first microlens units 31 may be provided according to the size of the central region. These first microlens units 31 may be identical in size, performance, or may be different as long as the combined light uniformizing power is larger than that of the second microlens units 32 located at the edge region. Also according to the size of the edge area, a corresponding number of second microlens units 32 may be provided. These second microlens units 32 may be identical in size, performance, or may be different as long as the combined dodging power is smaller than that of the first microlens unit 31 located in the central region.

In this embodiment, by providing the plurality of first microlens units 31 and the plurality of second microlens units 32, the center area and the edge area of the light spot 7 are respectively corresponding, and the light in the center area and the edge area is respectively subjected to the targeted light uniformizing treatment, because the light uniformizing capability of the first microlens units 31 is higher than that of the second microlens units 32, the laser in the center area of the light spot 7 can obtain a better uniform effect, so that the overall light uniformizing capability is improved, and the more uniform laser irradiates on the fluorescent wheel 42, so that the light utilization rate can be improved, and the color saturation excited is improved.

Further, in one embodiment, the size of the first microlens unit 31 is smaller than the size of the second microlens unit 32. Here, the first/second microlens units may be circular or square or have other shapes. The size of the microlens may be determined by the area of the light receiving surface of the microlens. For a square microlens unit, the dimension is the product of the length and the width of the light receiving surface.

In another embodiment, the size of the first microlens unit 31 gradually increases and/or the size of the second microlens unit 32 gradually increases from the center toward the edge of the spot 7. On the whole, the size of the micro-lens unit is gradually increased from the center of the light spot 7 to the edge, so that the characteristic of Gaussian distribution of energy in the light spot 7 can be better matched, and the light homogenizing effect on the light spot 7 is improved.

In another embodiment, the diffusion angle of the light by the first microlens unit 31 is larger than that by the second microlens unit 32. Specifically, the microlens has a focal length, and the diffusion angle of the microlens can be determined by adjusting the focal length of the microlens unit and the aspect ratio of the microlens unit. Therefore, in the present embodiment, the focal length of the microlens unit corresponding to the center of the light spot 7 or the aspect ratio of the light receiving surface of the microlens unit can be adjusted.

In another embodiment, the light source module further comprises a diverging layer for diverging the light; the diverging layer is attached to the side of the microlens array 3 facing away from the laser generating unit 1 and corresponds to the central area of each spot 7. The divergent layer can be a divergent film, so that the light spot 7 at the center is sequentially subjected to the light homogenizing treatment of the micro-lens array 3 and the light homogenizing treatment of the divergent layer, thereby improving the light uniformity.

The above embodiment adjusts the structure of the microlens array 3 to make the light scattering ability of the microlens unit corresponding to the center of the light spot 7 higher than that of the microlens unit corresponding to the edge of the light spot 7, thereby improving the light uniformizing ability of the center of the light spot 7. Moreover, since the size of the microlens unit corresponding to the edge of the light spot 7 is large, the light receiving capability of the angle of the outer edge of the light spot 7 can be improved, and it is ensured that the laser line at the edge can still be processed by the microlens unit and then is incident on the fluorescent wheel 42. Therefore, the structure of the micro-lens array 3 improves the light receiving effect on the light spots 7 and the angle of the outer edge, and improves the light utilization rate.

In an embodiment, the light combining component includes a light combining mirror 2, the light combining mirror 2 is disposed at one side of the laser generating unit 1, the light combining mirror 2 includes light combining reflective regions 21 and light transmitting regions 22 alternately disposed along a length direction thereof, and each light transmitting region 22 corresponds to a beam of laser light to pass through.

The light combining mirror 2 is disposed obliquely with respect to the microlens array 3. The transmissive region 22 may have a dichroic function, which allows direct transmission of blue light and reflection of other colored light beams. The reflective region 422 may include a mirror plate capable of being used for reflection, and the mirror plate may be coated with a total reflection mold to improve light reflection efficiency.

In one embodiment, the light combining mirror 2 has only one light combining reflection area 21 and one transmission area 22. Wherein the light-combining reflection region 21 is closer to the fluorescent wheel 42 side, and the transmission region 22 is closer to the laser 11 side. The light-combining reflective region 21 and the transmissive region 22 can be a single lens, and different processes for light can be realized by plating different film layers. Alternatively, the first and second portions are two lenses formed by splicing.

Referring to fig. 3, fig. 3 is a schematic view illustrating a light source assembly according to another exemplary embodiment. In another embodiment, the light combining mirror 2 sequentially includes a first light combining reflection region 23, a first transmission region 24, a second light combining reflection region 25, and a second transmission region 26 along its length direction. The laser 11 is used for emitting laser light, and the two mirror groups are respectively used for dividing the laser light into two beams, and respectively reflect the two beams to the first transmission region 24 and the second transmission region 26.

Illustratively, the direction of the laser light emitted by the laser 11 is a first direction, and the direction perpendicular to the first direction is a second direction. In some embodiments, the laser generating unit 1 further comprises a set of mirrors, two sets of mirrors being arranged between the laser 11 and the light combining mirror 2. The number of mirror groups may correspond to the number of laser beams. In a specific embodiment, two mirror groups 12 are provided for reflecting the 14 laser beams. Each mirror group 12 may include two mirrors disposed in parallel, and the two mirrors may be disposed at an angle of 45 ° with respect to the first direction, so that the laser light after two reflections still propagates along the first direction. The reflector set 12 includes a first plane mirror 121, a second plane mirror 122, a third plane mirror 123, and a fourth plane mirror 124, wherein the first plane mirror 121, the second plane mirror 122 are used for reflecting S1, the third plane mirror 123, and the fourth plane mirror 124 is used for reflecting S2.

The light path propagates through two embodiments, in the first embodiment, the laser light reflected by the reflector group 12 is emitted to the transmission region 22 of the light combining mirror 2, the transmission region 22 can allow the blue light in the multiple laser light to pass through to form multiple blue light, the laser light emitted from the transmission region 22 reaches the first lens group 41 and is converged by the first lens group 41 to form a light spot on the fluorescent wheel 42, so as to excite the fluorescent material on the fluorescent wheel to generate the received laser light, the received laser light is converged to form multiple harmonic light, the multiple harmonic light is emitted to the multiple light combining reflection regions 21 and is reflected by the light combining reflection regions 21 to form the light source.

Schematically, by adjusting the distance between the two mirror groups 12, two uniform laser beams formed by the light beam emitted from the laser 11 passing through the two mirror groups, the second lens group 51 and the microlens unit are respectively emitted to the first transmission region 24 and the second transmission region 26 in a one-to-one correspondence manner, thereby reducing the light loss.

In a second embodiment, the dimming unit is disposed at one side of the light combining component, the laser light reflected by the reflector set 12 is emitted to the light combining reflection area 21 of the light combining mirror 2, the light combining reflection area 21 is configured to reflect a plurality of laser light beams to the first lens set 41, the laser light beams are converged by the first lens set 41 to form a light spot on the fluorescent wheel 42, and then the fluorescent material on the fluorescent wheel 42 is excited to generate a received laser light, the received laser light beams are converged to form a plurality of harmonic light beams, and the plurality of harmonic light beams are further emitted to the transmission area 22 and filtered by the transmission area 22 to form a light source.

In order to further improve the light utilization efficiency, in an embodiment, the shape and size of the first light combining reflection region 23 and the second light transmitting region 26 are correspondingly the same, and are symmetrical along the longitudinal axis of the light combining mirror 2; the second light combining reflection area 25 has the same shape and size as the first transmission area 24, and is symmetrical along the longitudinal axis of the light combining mirror 2. Illustratively, when there are two light beams S1 and S2, the light beam S1 is transmitted from the first transmission region 24 to the first lens group 41, refracted by the first lens group 41, and reflected by the fluorescence wheel 42, and most of the light beam can be emitted to the second light combining reflection region 25, so that the loss of light rays passing through the first transmission region 24 and the second light combining reflection region 25 is reduced. Similarly, the light beam S2 is transmitted from the second transmission region 26 to the first lens group 41, refracted by the first lens group 41, and reflected by the fluorescent wheel 42, and most of the light beam can be emitted to the first light combining reflection region 23. By such an arrangement, the loss of light through the second transmissive region 26 and the first light-combining reflective region 23 is reduced.

In this embodiment, the light combining mirror 2 may be a whole lens, and the first light combining reflection area 23, the first transmission area 24, the second light combining reflection area 25, and the second transmission area 26 are formed by plating corresponding film layers on different areas. In other embodiments, the light combining mirror 2 may also be formed by splicing four small lens pieces, so that the length of the light combining mirror 2, the projection area, and the number of light combining areas can be flexibly configured.

Illustratively, the first lens group 41 includes two convex lenses for converging the laser light transmitted from the light combining mirror 2 and transmitting the light reflected from the fluorescent wheel 42 to the light combining reflection area 21 of the light combining mirror 2. Based on the foregoing example, after the light beam S1 enters the first lens group 41, the light beam S is refracted at an angle α, and finally converged to form a light spot 7, and the light spot is projected onto the fluorescence wheel 42, and the light beam reflected by the fluorescence wheel 42 is projected onto the light combination reflection area 21 through the divergence processing of the first lens group 41.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating a fluorescent wheel according to an example embodiment. In one embodiment, the fluorescent wheel 42 includes a circular substrate 421, and further includes at least one light conversion region 423, a reflective region 422 and at least one light conversion region 423 sequentially arranged on the substrate 421 along a circumferential direction of the substrate 421.

Specifically, the fluorescent wheel 42 is a three-primary-color fluorescent wheel, and there are two light conversion regions 423, where one light conversion region 423 has a red fluorescent material therein, and the red fluorescent material can emit red light under excitation of blue laser light; one of the light conversion regions 423 includes a green fluorescent material capable of emitting green light under excitation of blue laser light. In addition, blue light emitted to the reflective region 422 can form red, yellow and blue light. During the operation of the projection device, the fluorescent color wheel rotates at a high speed, so that there will be two complete light source wavelength conversions for each rotation of the fluorescent wheel 42 for one period to form red light and green light, and thus red, yellow and blue light will be generated for each rotation of the fluorescent wheel 42 for one period.

Further, in an embodiment, the light source assembly further includes a second lens 61 and a light guide pipe 62, the second lens 61 and the light guide pipe 62 are sequentially disposed on one side of the light combining mirror 2, and the second lens 61 is configured to converge the light reflected by the light combining reflection area 21 to an inlet of the light guide pipe 62. And further enters the optical machine through the light guide light outlet.

In an embodiment, a color filter wheel is further disposed between the second lens 61 and the light pipe 62 for filtering the light beam, so as to improve the optical purity of the light beam and improve the color display effect.

An embodiment of the optical propagation path is generally described herein. First, light rays S1 and S2 emitted by the laser 11 are reflected by the two mirror groups and then projected onto the second lens group 51, a light beam processed by the second lens group 51 is a circular light beam, the light beam is incident on the fly eye lens, the fly eye lens diffuses the blue laser beam, so that the angle of the blue laser beam is diverged at a certain length and width angle, the diverged light beam is incident on the first transmission region 24 and the second transmission region 26 of the light combining mirror 2, passes through the first transmission region 24 and the second transmission region 26 and is projected onto the first lens group 41, and the blue light processed by the first lens group 41 is incident on the fluorescence wheel 42. During the rotation of the fluorescent wheel 42, the blue light is emitted to the blue light reflecting region 422, part of the blue light is reflected by the blue light reflecting region 422, and part of the blue light is emitted to the dimming region to excite the first color light and then be reflected; the reflected blue light and the first color are reflected by a reflection area 422 (including the first light combining reflection area 23 and the second light combining reflection area 25) on the light combining mirror 2, and then enter the second lens 61, and the second lens 61 converges the light. The converged light enters the light guide 62 through the entrance port of the light guide 62 and finally enters the optical engine.

The distance between the laser beams emitted by the laser 11 can be adjusted by setting the mirror group. Moreover, by the design of the position of the reflector group, the distance between the split lasers can be adjusted to adapt to the distance between the transmission regions 22 in the light combiner 2, so that the light utilization efficiency is improved, and light beams with different optical axes from the first lens group 41 can be formed, so that the first lens group 41 can refract the light beams smoothly.

While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A light source assembly, comprising:

a laser generating unit for generating a plurality of laser beams;

the micro lens array is arranged on one side of the laser generating unit, is a single-sided micro lens array and is used for homogenizing the multiple laser beams; the multiple laser beams are irradiated on the micro lens array to form a plurality of light spots; each light spot comprises a central area and an edge area, the micro lens array comprises a plurality of first micro lens units and a plurality of second micro lens units, the central area of the light spot covers the plurality of first micro lens units, and the edge area of the light spot covers the plurality of second micro lens units; wherein the light uniformizing capability of the first microlens unit is higher than that of the second microlens unit, the size of the first microlens unit is smaller than that of the second microlens unit, and the size of the first microlens unit gradually increases from the center of the light spot to the edge;

the dimming unit is arranged on one side of the light combination assembly, which is far away from the laser generation unit, and comprises a first lens group and a fluorescent wheel; the transmission area is used for allowing a plurality of laser beams to pass through, the first lens group is used for converging the laser beams onto the fluorescent wheel, the laser beams are excited to form a plurality of harmonic light beams, and the harmonic light beams are emitted to the light combination reflection areas and are reflected by the light combination reflection areas to form a light source.

2. A light source assembly, comprising:

a laser generating unit for generating a plurality of laser beams;

the micro lens array is arranged on one side of the laser generating unit, is a single-sided micro lens array and is used for homogenizing the multiple laser beams; the multiple laser beams are irradiated on the micro lens array to form a plurality of light spots; each of the light spots comprises a central area and an edge area, the microlens array comprises a plurality of first microlens units and a plurality of second microlens units, the central area of the light spot covers the plurality of first microlens units, and the edge area of the light spot covers the plurality of second microlens units; wherein the light uniformizing capability of the first microlens unit is higher than that of the second microlens unit, the size of the first microlens unit is smaller than that of the second microlens unit, and the size of the first microlens unit is gradually increased from the center of the light spot toward the edge;

the dimming unit is arranged on one side of the light combination component and comprises a first lens group and a fluorescent wheel; the light combining and reflecting area is used for reflecting a plurality of laser beams to the first lens group, the first lens group converges the laser beams to the fluorescent wheel so as to excite the laser beams to form a plurality of harmonic light beams, and the harmonic light beams are emitted to the plurality of transmission areas and form a light source after being filtered by the transmission areas.

3. The light source assembly according to claim 1, wherein the light combining assembly includes a light combining mirror, the light combining mirror includes a plurality of light combining reflective regions and a plurality of transmissive regions, the light combining reflective regions and the transmissive regions are alternately disposed, and each transmissive region corresponds to a laser beam to pass through so as to be emitted to the light dimming unit.

4. The light source component of claim 3, wherein the light combining mirror comprises a first light combining reflection region, a first transmission region, a second light combining reflection region, and a second transmission region in sequence along a length direction of the light combining mirror;

5. The light source assembly according to claim 4, wherein the laser generating unit comprises a laser and two mirror groups disposed between the laser and the light combining mirror; the laser is used for emitting laser, and the two reflector groups are respectively used for dividing the laser into two beams which are respectively reflected to the first transmission area and the second transmission area.

6. The light source module according to claim 1, further comprising a second lens and a light guide, wherein the second lens and the light guide are sequentially disposed on one side of the light combining module, and the second lens is configured to converge the light reflected by the light combining reflective area to an inlet of the light guide.

7. A projection apparatus, comprising an optical engine, a lens and a light source module according to any one of claims 1 to 6;

the light source assembly is used for converting monochromatic laser into tricolor light according to time sequence and inputting the tricolor light into the optical machine; the light machine modulates the tricolor light after time sequence conversion and outputs the tricolor light to the lens; the lens collects and images modulated light input from the optical machine and projects the modulated light.