CN118011721A - Light source system - Google Patents

Abstract

The invention relates to the technical field of projection optical systems, in particular to a light source system, which comprises a first light source part, a second light source part, a wavelength conversion component and a light combination component, wherein light emitted by the first light source part is guided to a combined light emitting direction by the light combination component, the wavelength conversion component is irradiated by the second light source part to excite and generate radiation fluorescence, and the radiation fluorescence is guided to the combined light emitting direction by the light combination component. The optical interfaces of the light combining components adopted by the light source system are concentrated and orderly distributed, the structure is simple and compact, the occupied space is small, the light path is short, light splitting and light combining are carried out in a limited space, the light combining illumination with small volume and high efficiency is realized, speckle is reduced, and the light emitting quality is improved.

Description

Light source system

Technical Field

The present disclosure relates to projection optical systems, and particularly to a light source system.

Background

The laser light source is a common light source type of projector, has the advantages of high brightness, wide color gamut, vivid images and the like, and has the disadvantages that laser with high coherence degree can generate speckle phenomenon after being reflected on the projection surface, and the look and feel are affected. The fluorescent light is excited by the short wavelength laser, and then the fluorescent light and the three-color laser are combined to form a common technical means, so that the brightness can be supplemented, and the laser speckle can be reduced. However, the light source system adopted by the existing projector has complex light combination structure, long light path and large occupied volume, and affects the light combination efficiency.

Disclosure of Invention

The invention aims to solve the technical problems and the technical task of improving the prior art, provides a light source system, and solves the problems of complex light combination structure, long light path and large occupied volume of the light source system in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

The light source system comprises a first light source part, a second light source part, a wavelength conversion component and a light combination component, wherein the light combination component comprises a plurality of optical interfaces, the optical interfaces are distributed at intervals along the circumferential direction of a center point, the surface directions of the optical interfaces are along the radial direction, each optical interface respectively has different transmission and reflection characteristics, light emitted by the first light source part is guided to a light combination emergent direction by the light combination component, the wavelength conversion component is irradiated by the second light source part to excite and generate radiation fluorescence, and the radiation fluorescence is guided to the light combination emergent direction by the light combination component. The optical interfaces of the light combining components adopted by the light source system are concentrated and orderly distributed, the structure is compact, the occupied space is small, the light path is short, and each optical interface of the light combining components is used for transmitting and/or reflecting light in a limited space so as to realize light splitting and light combining, and finally, the required light combining light beams are obtained, so that the whole light source system has a simple structure, the occupied volume is reduced, and the requirement of miniaturization development is met.

Further, the light combining component comprises a first optical interface, a second optical interface and a third optical interface which are distributed at a certain preset angle along the circumferential direction of the central point, wherein light emitted by the first light source part is obliquely incident to the second optical interface, the light emitted by the first light source part is guided to the first optical interface through the second optical interface, the first optical interface transmits the light emitted by the first light source part to the light combining outgoing direction, and radiant fluorescence generated by excitation of the wavelength conversion component is reflected to the light combining outgoing direction by the first optical interface and the third optical interface. The structure is simple, the occupied space is small, the light path is short, the requirements of light splitting and light combining can be met only by three optical interfaces, fluorescence excitation is realized to generate broadband radiation fluorescence, effective light combining of light used for light combining and supplementing and broadband radiation fluorescence in narrow bands is realized, light combining efficiency is improved, light brightness is improved, speckle condition is reduced, and the light transmitting and reflecting characteristics of the three optical interfaces can be designed according to specific light path structure layout to flexibly meet various different requirements.

Further, the light emitted by the second light source unit is obliquely incident to the second optical interface, all or a part of the light emitted by the second light source unit is guided to the third optical interface through the second optical interface, and the third optical interface transmits the light emitted by the second light source unit to the wavelength conversion component. The light combining component is used for guiding light emitted by the light source part II to the wavelength conversion component for fluorescence excitation and combining the radiant fluorescence with the light emitted by the light source part, and has multiple functions, high integration level and small occupied volume.

Further, a collimating lens group is arranged between the light combination component and the wavelength conversion component, light emitted by the second light source part enters the collimating lens group in an off-axis manner, the wavelength conversion component moves dynamically, a wavelength conversion region and a reflection region distributed along the circumferential direction are arranged on the wavelength conversion component, light emitted by the second light source part reflected by the reflection region of the wavelength conversion component is reversely emitted from the collimating lens group in an off-axis manner, and light emitted by the second light source part from the collimating lens group is reflected and guided to a combined light emitting direction by the light combination component. The light emitted by the second light source part is incident on the collimating lens group in an off-axis way, so that the light emitted by the collimating lens group to the wavelength conversion component is inclined to the reflecting area, the light emitted by the second light source part reflected by the reflecting area is also obliquely incident into the collimating lens group, after the collimating effect of the collimating lens group, the light emitted by the second light source part reversely emitted by the collimating lens group is off-axis, and the light emitted by the second light source part is shifted relative to the light emitted by the second light source part originally incident on the collimating lens group, namely, the light emitted by the second light source part reflected by the reflecting area is not returned to the second light source part along the original way, but is transmitted along a new light path, the separation of light paths is realized, the light emitted by the second light source part reflected by the reflecting area can be effectively utilized to be converged into a combined light beam, in short, the light emitted by the second light source part reflected by the reflecting area is a component part of the combined light beam, so that the first light emitted by the second light source part is used for excitation to generate radiation fluorescence, and the other part is used for combined light output, and the light emitted by the second light source part plays a dual role.

Further, the light emitted by the second light source unit is directed to the light combining component, and all or part of the light emitted by the second light source unit is guided to the wavelength conversion component by the light combining component to excite and generate radiant fluorescence. The light combination component plays a plurality of roles, has high integration level and small occupied volume.

Further, the first light source part comprises a first sub light source, a second sub light source and a beam splitting and expanding assembly, the beam splitting and expanding assembly comprises a first beam splitting device and a second beam splitting device, the first beam splitting device comprises at least two first beam splitting interfaces, light emitted by the second sub light source respectively has different reflectivities, light emitted by the first sub light source sequentially passes through the first beam splitting interfaces to split sub light rays of a plurality of paths, the second beam splitting device comprises at least two second beam splitting interfaces, light emitted by the second sub light source respectively has different reflectivities, light emitted by the second sub light source sequentially passes through the second beam splitting interfaces to split sub light rays of a plurality of paths, and the sub light rays are combined to emit. The light emitted by the first sub-light source and the second sub-light source is split into multiple paths in a light splitting mode to realize beam expansion, then the light emitted by the first sub-light source and the light emitted by the second sub-light source are combined, so that the light emitting uniformity of the first light source part is improved, the first sub-light source and the second sub-light source can generally adopt a narrow-band laser light source, the band range of the narrow-band laser light source is narrow, the divergence angle of the narrow-band laser light source is small, the band range of the radiation fluorescence generated by the wavelength conversion component is large, the divergence angle of the radiation fluorescence generated by the wavelength conversion component is large, the direct combination of the radiation fluorescence generated by the first sub-light source and the second sub-light source is difficult, the light combining uniformity is poor, and the light energy emitted by the first light source part is more efficiently, fully and uniformly combined with the radiation fluorescence generated by the wavelength conversion component, the light emitting efficiency is improved, and the light emitting uniformity and quality are improved.

Further, the first sub-light is emitted to the second light splitting device, and the second light splitting interface transmits the light emitted by the second sub-light source so that the first sub-light and the second sub-light are emitted in a combined mode. The integration level is high, the light splitting interface II plays a double role, and the light splitting interface II is used for splitting light emitted by the secondary light source II into multiple paths to expand the beam and combining the secondary light with the primary light, so that the number of components is reduced, the occupied volume is reduced, the assembly is facilitated, and the implementation cost is reduced.

Further, the beam splitting and expanding assembly further comprises a micro lens array, wherein the micro lens array is arranged on an optical path from the first beam splitting device to the second beam splitting device of the sub-light, and/or the micro lens array is arranged on an emergent optical path of the second beam splitting device. The first sub-light and the second sub-light are subjected to light homogenizing treatment by utilizing the micro-lens array, so that the first sub-light and the second sub-light are fully and uniformly combined, and the micro-lens array can be used for dissipating and reducing speckle conditions during projection.

Further, the beam splitting and expanding assembly further comprises a dissipation element, and the dissipation element is arranged on a light combining emergent light path of the first sub-light and the second sub-light. The scattered component is used for further carrying out scattered treatment on the combined light of the sub-light I and the sub-light II, so that the speckle condition during projection is reduced.

Further, the dissipation element is a dynamically movable diffusion sheet or a micro lens, and the dissipation means comprises diffusion treatment or light homogenizing treatment, so that the coherence of the emitted light is reduced, and the speckle condition is effectively reduced.

Further, the first light splitting device comprises at least one light-transmitting flat sheet, films are coated on two side surfaces of the light-transmitting flat sheet to form the first light splitting interface, the second light splitting device comprises at least one light-transmitting flat sheet, and films are coated on two side surfaces of the light-transmitting flat sheet to form the second light splitting interface. The structure is simple and compact, the occupied space is small, the implementation is easy, and the transmission and reflection characteristics of each light-splitting interface can be conveniently controlled through the coating, so that the requirements are flexibly met.

Furthermore, the first light source part and the second light source part are integrated into a whole to emit light in the same direction, so that the integration level is high, and the occupied volume is small.

Further, the light emitted by the first light source part comprises light with the same color as the light emitted by the second light source part but different in wavelength, and the light with the same color as the light emitted by the second light source part is effectively combined and supplemented, so that the brightness of the light with the same color is improved, the color vividness is improved, the coherence is reduced, the speckle is favorably eliminated, and the projection picture quality is improved.

Compared with the prior art, the invention has the advantages that:

the optical interfaces of the light combining components adopted by the light source system are concentrated and orderly distributed, the structure is simple and compact, the occupied space is small, the light path is short, light splitting and light combining are carried out in a limited space, the light combining illumination with small volume and high efficiency is realized, speckle is reduced, the light emitting quality is improved, and the projection picture quality is improved.

Drawings

FIG. 1 is a schematic diagram of a light source system according to the present invention;

fig. 2 is a schematic view of a first light source unit according to the present invention;

FIG. 3 is a schematic view of another light source system according to the present invention;

FIG. 4 is a schematic diagram of a wavelength conversion module according to the present invention;

FIG. 5 is a schematic view of a light source system according to another embodiment of the present invention;

FIG. 6 is a schematic view showing a combination of a first light source unit and a second light source unit according to the present invention;

FIG. 7 is a schematic view of a light source system according to another embodiment of the present invention;

Fig. 8 is a schematic structural view of another light source system according to the present invention.

In the figure:

a first light source part 1, a first sub light source 11, a second sub light source 12, a third sub light source 13, a beam-splitting and beam-expanding component 5, a first beam-splitting device 51, a first beam-splitting interface 511, a second beam-splitting device 52, a second beam-splitting interface 521, a microlens array 53, a dissipation element 54, a second light source part 2, a wavelength conversion component 3, a wavelength conversion region 31, a reflection region 32, a light combining component 4, a first optical interface 41, a second optical interface 42, a third optical interface 43, a fourth optical interface 44, a fifth optical interface 45, a collimating lens group 6, a converging lens group 7 and a light homogenizing device 8.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The light source system disclosed by the embodiment of the invention has the advantages of compact structure and small occupied space, can perform efficient light combination, ensures the light emitting quality and improves the projection picture quality.

As shown in fig. 1, a light source system mainly includes a first light source portion 1, a second light source portion 2, a wavelength conversion component 3, and a light combining component 4, where the light combining component 4 includes a plurality of optical interfaces, the optical interfaces are distributed at intervals along a circumference of a center point, a surface direction of each optical interface is along a radial direction, each optical interface has different light transmitting and reflecting characteristics, light emitted by the first light source portion 1 is guided to a light combining outgoing direction by the light combining component 4, the wavelength conversion component 3 is irradiated by the second light source portion 2 to excite and generate radiation fluorescence, and the radiation fluorescence is guided to the light combining outgoing direction by the light combining component 4. The light combining component 4 has a simple and compact structure and small occupied space, and utilizes all optical interfaces of the light combining component 4 to guide light in a limited space so as to realize light splitting and light combining, the light path is short, the loss is reduced, and the efficiency is improved, wherein the first light source part 1 preferably adopts a laser light source, the monochromaticity is good, the brightness is high, the second light source part 2 can adopt a laser light source with a short wavelength, the short-wave laser emitted by the second light source part 2 is excited to generate radiant fluorescence with a wider wave band range when irradiated on the wavelength conversion component 3, and the laser with a narrow wave band is used as complementary light to combine with the radiant fluorescence with a wide wave band, so that the overall brightness is effectively improved, the light source system can take into account the color gamut and the brightness, the problems of speckle and color edges are reduced, and the projection picture quality is improved.

As shown in fig. 1, in one embodiment, the light combining component 4 specifically includes a first optical interface 41, a second optical interface 42, and a third optical interface 43 that are sequentially spaced at a predetermined angle along the circumferential direction of the center point, where the light emitted from the first light source unit 1 is obliquely incident on the second optical interface 42; the light emitted by the first light source part 1 is guided to the first optical interface 41 through the second optical interface 42; the first optical interface 41 transmits the light emitted by the first light source part 1 to the combined light emitting direction; the radiant fluorescence generated by excitation of the wavelength conversion component 3 is reflected to the combined light emitting direction by the first optical interface 41 and the third optical interface 43.

The angles of the first optical interface 41, the second optical interface 42 and the third optical interface 43 can be specifically designed according to the needs, so that the incident angle of the light emitted by the first light source part 1 to the second optical interface 42 and the incident angle of the radiant fluorescence generated by the excitation of the wavelength conversion component 3 to the first optical interface 41 and the third optical interface 43 can be designed according to the arrangement of the angles of the three optical interfaces, and the radiant fluorescence and the light emitted by the first light source part 1 can effectively emit in the same direction to combine the light. As shown in fig. 1, in an embodiment, the angles between the first optical interface 41 and the second optical interface 42 and the angles between the second optical interface 42 and the third optical interface 43 are 90 ° respectively, the incident angle of the light emitted by the first light source unit 1 to the second optical interface 42 is 45 °, the incident angle of the main optical axis of the radiation fluorescence generated by excitation of the wavelength conversion component 3 to the first optical interface 41 and the incident angle of the light emitted by the third optical interface 43 are 45 °, and after the radiation fluorescence is guided by the first optical interface 41, the second optical interface 42 and the third optical interface 43, the radiation fluorescence and the light emitted by the first light source unit 1 can exit in the same direction only through a shorter optical path to realize light combination, so that the structure is simplified and the light combination efficiency is improved.

Furthermore, the transmission and reflection characteristics of the first optical interface 41, the second optical interface 42 and the third optical interface 43 can be designed according to specific structural layout, so as to flexibly meet different requirements. As shown in fig. 1, the light emitted from the first light source unit 1 is directed to the second optical interface 42 from top to bottom, the second optical interface 42 reflects the light emitted from the first light source unit 1 to the first optical interface 41 on the left side, and the light emitted from the first light source unit 1 is transmitted from the first optical interface 41 to be converged in the combined light emitting direction. The light emitted from the second light source 2 is directed to the light combining element 4, and all or part of the light emitted from the second light source 2 is guided to the wavelength conversion element 3 by the light combining element 4 to excite and generate radiant fluorescence, that is, the light combining element 4 functions to guide the light emitted from the second light source 2 to the wavelength conversion element 3, in this embodiment, the light emitted from the second light source 2 is directed obliquely from right to left to the second optical interface 42, the second optical interface 42 totally reflects and guides the light emitted from the second light source 2 to the third optical interface 43 on the lower side, the light emitted from the second light source 2 is transmitted from the third optical interface 43 to be irradiated to the wavelength conversion element 3, and the wavelength conversion element 3 is excited to generate radiant fluorescence propagating in the opposite direction. The divergence angle of the radiant fluorescence is large, so that the collimating lens group 6 is arranged between the light combining component 4 and the wavelength conversion component 3, the radiant fluorescence is collimated and received by the collimating lens group 6, the radiant fluorescence passes through the collimating lens group 6 and irradiates on the first optical interface 41 and the third optical interface 43, and then the first optical interface 41 and the third optical interface 43 reflect the radiant fluorescence to the light combining outgoing direction, so that the radiant fluorescence is combined with the light emitted by the first light source part 1. And a converging lens group 7 and a light homogenizing device 8 are arranged on a light path of the combined light, and the converging lens group 7 receives the combined light beam so that the combined light beam is converged into the light homogenizing device 8 for light homogenizing treatment, and the light emitting quality is better improved. In this embodiment, the wavelength conversion device 3 employs a static ceramic fluorescence sheet, so that only a single color of radiant fluorescence is generated when the wavelength conversion device 3 is irradiated by the light emitted from the light source unit 2, and in this embodiment, the light emitted from the light source unit 2 is only used for excitation to generate radiant fluorescence, and the light emitted from the light source unit 2 is not converged into the combined light beam to be a component of the combined light beam, specifically, the light source unit 2 employs a blue laser, and the radiant fluorescence such as yellow or orange is generated when the wavelength conversion device 3 is irradiated. The light source part 1 is a supplementary light source, and the emitted light mainly acts to be converged into the combined light beam to supplement a certain color light or a plurality of color lights in the combined light beam, so that the purity and brightness of the color light are improved, and the light emitted by the light source part 1 can comprise one or a plurality of color lights, and the light source part 1 can comprise only one sub-light source to emit single color light, and can also comprise a plurality of different sub-light sources to emit a plurality of different color lights. In this embodiment, the first light source 1 specifically adopts a laser light source and may emit three kinds of color light, so that the first light source 1 includes three kinds of sub-light sources to emit light with different colors, and specifically, the first light source 1 may emit three kinds of color light of red light, green light and blue light, and further radiate fluorescence to combine with the light emitted by the first light source 1 to obtain a combined light beam that is white overall. In the present embodiment, the optical interface one 41 transmits light emitted from the light source part one 1 to reflect radiant fluorescence, that is, the optical interface one 41 transmits red light, green light and blue light to reflect yellow light, specifically, the optical interface one 41 has a transflective property of transmitting light in a wavelength range of 635 to 645nm, 510 to 530nm and 440 to 470nm and reflecting light in a wavelength range of 530 to 620nm and 470 to 500 nm; the second optical interface 42 can directly adopt a reflector to reflect light with any visible wavelength; the third optical interface 43 transmits the light emitted by the second light source part 2 and reflects the radiated fluorescence, specifically, the third optical interface 43 transmits blue light and reflects visible light of other wave bands, specifically, the third optical interface 43 transmits light with a wavelength range of 400-470 nm and reflects light of other wave bands, the first optical interface 41, the second optical interface 42 and the third optical interface 43 can specifically use optical filters, and the transmission and reflection characteristics of each optical interface can be controlled by controlling the coating characteristics so as to meet the requirements.

In the specific embodiment shown in fig. 1, since the first laser light source 1 is a laser light source with a narrow wavelength band and a small divergence angle, and the wavelength band of the radiant fluorescence generated by the wavelength conversion component 3 is large and the divergence angle is large, the direct coupling of the two light sources is difficult, and the uniformity and the sufficiency of the combined light are poor, so that it is preferable to perform the beam expanding and light homogenizing treatment on the laser light source first, so that the laser light beam and the radiant fluorescence are more sufficiently and uniformly combined, and the light output quality is further improved. Specifically, as shown in fig. 2, the first light source portion 1 includes a first sub-light source 11, a second sub-light source 12, a third sub-light source 13, and a beam splitting and expanding assembly 5, specifically, the beam splitting and expanding assembly 5 includes a first beam splitting device 51 and a second beam splitting device 52, the first beam splitting device 51 includes at least two first beam splitting interfaces 511 arranged side by side, each first beam splitting interface 511 has different reflectivities for light emitted by the second sub-light source 12, light emitted by the first sub-light source 11 sequentially passes through the first beam splitting interfaces 511 to split light into a plurality of first sub-light beams, the second beam splitting device 52 includes at least two second beam splitting interfaces 521 arranged side by side, each second beam splitting interface 521 has different reflectivities for light emitted by the second sub-light source 12, light emitted by the second sub-light source 12 sequentially passes through the second beam splitting interfaces 521 to split light beams of a plurality of paths, and the first sub-light beams and the second sub-light beams combine, and preferably, the number of the first sub-light beams and the second sub-light beams combine light beams are the same. The light emitted by the first sub-light source 11 and the second sub-light source 12 is split into multiple paths in a light splitting mode to realize beam expansion, then the first sub-light rays and the second sub-light rays with the same path number are combined, and the light combination sufficiency and uniformity are improved, so that the light emission uniformity of the first light source part is improved. Specifically, in one embodiment shown in fig. 2, the first sub-light source 11 is provided with only one path, and the first light splitting interfaces 511 are provided with four paths, so that the light emitted by the first sub-light source 11 can be divided into four paths, the first sub-light source 11 sequentially passes through the first light splitting interfaces 511 to transmit and/or reflect, specifically, the light reflected by each first light splitting interface 511 is one path of first sub-light, preferably, the energy of each first sub-light is the same, so that the reflectivity of the light of the first sub-light source 11 by the first light splitting interfaces 511 is sequentially 25%, 33.3%, 50% and 100% along the sequence of the light emitted by the first sub-light source 11, so as to realize uniform light splitting and beam expansion. The secondary light source two 12 is provided with two paths, so that the secondary light splitting interface two 521 can divide the light emitted by the secondary light source two 12 into four paths, specifically, the light reflected by each secondary light splitting interface two 521 is one secondary light, preferably, the energy of each secondary light is the same, so that the reflectivity of the light of each secondary light splitting interface two 521 to the secondary light source two 12 is 50% and 100% in sequence along the sequence of the light emitted by the secondary light source two 12, and the original two paths of light are split and expanded into four paths of light.

The sub-light rays I and the sub-light rays II with the same number of paths are combined, so that the sufficiency and uniformity of the combined light can be improved, and particularly, an additional light combining device such as a dichroic mirror can be adopted for combining the light, and the dichroic mirror reflects one of the sub-light rays I and the sub-light rays II and transmits the other one of the sub-light rays I and the sub-light rays II, so that the combined light can be conveniently realized. In order to improve the compactness of the structure and reduce the occupied volume, as shown in fig. 2, the second beam splitting interface 521 is directly utilized to realize the beam combination, that is, the second beam splitting interface 521 not only performs the beam splitting function on the second light source 12, but also performs the beam combination function on the first sub-light and the second sub-light, specifically, the first sub-light is directed to the second beam splitting device 52, the second beam splitting interface 521 transmits the light emitted by the second sub-light source 12 to make the first sub-light and the second sub-light combine and emit, and if the first sub-light source 11 is green laser and the second sub-light source 12 is red laser, the second beam splitting interfaces 521 transmit the green light and have different reflectivities on the red light. Of course, the number of the first sub-light sources 11 and the second sub-light sources 12 may be other, so long as the number of the first sub-light sources and the second sub-light sources 521 is correspondingly designed, the same number of the first sub-light sources and the second sub-light sources can be achieved, and further sufficient and uniform light combination can be achieved. Furthermore, the first light splitting device 51 includes at least one light-transmitting flat sheet, the two side surfaces of the light-transmitting flat sheet are coated to form the first light splitting interface 511, the second light splitting device 52 includes at least one light-transmitting flat sheet, the two side surfaces of the light-transmitting flat sheet are coated to form the second light splitting interface 521, the structure is simple and compact, the occupied space is small, the implementation is easy, the light-transmitting and reflecting characteristics of each light splitting interface can be conveniently controlled through the coating, and thus the requirements can be flexibly met.

In the same way, the light emitted by the third sub-light source 13 can be split and expanded and then combined with the first sub-light and the second sub-light, and of course, the third sub-light source 13 can also be used as other light sources, and the split and expanded light is not needed, for example, the third sub-light source 13 adopts blue laser, and the third sub-light source 13 supplements the blue light part in the combined light beam of the whole light source system. In order to facilitate the light path arrangement, the first sub-light source 11, the second sub-light source 12 and the third sub-light source 13 are arranged side by side to emit light in the same direction, the light emitted by the first sub-light source 11 and the second sub-light source 12 is turned under the action of the first light splitting device 51 and the second light splitting device 52, and the third sub-light source 13 is correspondingly turned to facilitate the light path design, specifically, as shown in fig. 2, the light emitted by the third sub-light source 13 is directed to the second light splitting interface 521, and the light emitted by the third sub-light source 13 is totally reflected by the second light splitting interface 521 so that the light emitted by the third sub-light source 13 and the combined light beams of the first sub-light and the second sub-light are emitted in the same direction.

As shown in fig. 2, the beam splitting and expanding assembly 5 further includes a microlens array 53, where the microlens array 53 is disposed on the optical path from the first beam splitting device 51 to the second beam splitting device 52 of the sub-beam, and/or the microlens array 53 is disposed on the outgoing optical path of the second beam splitting device 52. The first sub-light and the second sub-light are uniformly mixed by utilizing the micro-lens array 53, so that the first sub-light and the second sub-light are more fully and uniformly mixed, and the micro-lens array can be used for dissipation and reducing the speckle condition during projection. Further, the beam splitting and expanding assembly 5 further includes a dissipation element 54, where the dissipation element 54 is disposed on the light-combining outgoing light path of the first sub-ray and the second sub-ray. The dissipation element is used for further dissipating the combined light of the sub-light I and the sub-light II so as to reduce the speckle condition during projection, specifically, the dissipation element 54 is a dynamically movable diffusion sheet or a micro lens, the dissipation means comprises diffusion treatment or light homogenizing treatment, the dynamic movement can be specifically rotation, vibration and the like, and the coherence of the emitted light can be better reduced by adopting a dynamic dissipation mode so as to effectively reduce the speckle condition.

In one embodiment shown in fig. 3 and fig. 4, the wavelength conversion component 3 is dynamically movable, and the wavelength conversion component 3 is provided with a wavelength conversion region 31 and a reflection region 32 distributed along a circumferential direction, for example, the wavelength conversion component 3 is driven by a motor to perform rotational movement, so, as shown in fig. 4, the wavelength conversion region 31 and the reflection region 32 are distributed along a rotational circumferential direction, the wavelength conversion region 31 may specifically include a plurality of different sub-regions, the different sub-regions respectively generate radiant fluorescence of different colors when irradiated by excitation light, when the wavelength conversion component 3 rotates, the wavelength conversion region 31 and the reflection region 32 are sequentially switched onto an optical path to be irradiated by light emitted by the light source part 2, when the wavelength conversion region 31 is switched onto the optical path, the wavelength conversion region 31 is irradiated to generate radiant fluorescence, and when the reflection region 32 is switched onto the optical path, the reflection region 32 reflects the light emitted by the light source part 2. The collimating lens group 6 is arranged between the light combining component 4 and the wavelength conversion component 3, the light emitted by the second light source part 2 enters the collimating lens group 6 in an off-axis mode and then enters the wavelength conversion component 3, namely, the light emitted by the second light source part 2 enters the collimating lens group 6 in a state of being parallel to the optical axis of the collimating lens group 6 and deviating from the optical axis of the collimating lens group 6, so that after the converging action of the collimating lens group 6, the light emitted by the second light source part 2 enters the wavelength conversion component 3 in an inclined mode, when the reflecting area 32 is switched to an optical path, the obliquely incident light is reflected by the reflecting area 32 to be emitted, namely, the light emitted by the second light source part 2 reflected by the reflecting area 32 reversely enters the collimating lens group 6 in an inclined mode, and the light emitted by the second light source part 2 reversely emitted by the collimating lens group 6 is off-axis under the collimating action of the collimating lens group 6, and the light emitted by the second light source part 2 reversely emitted by the collimating lens group 6 is translated relative to the light emitted by the second light source part 2 originally entering the collimating lens group 6, so that the light path separated by the second light source part 2 reversely emitted by the collimating lens group 6 is not reflected by the reflecting area 32 returns to the collimating lens group 2 along the light path. The light of the light source part two 2 emitted from the collimating lens group 6 is reflected and guided to the light combining emission direction by the light combining component 4, specifically, the light of the light source part two 2 emitted from the collimating lens group 6 reversely emits to the optical interface one 41, the light of the light source part two 2 emitted from the collimating lens group 6 reversely emits to the light combining emission direction by the optical interface one 41, so that the light of the light source part two 2 emitted from the collimating lens group 6 reversely emits to combine light beams to form a component part of the combined light beams, in other words, a part of the light emitted from the light source part two 2 is used for irradiating the wavelength conversion region 31 to generate radiation fluorescence, and the other part of the light is used as complementary light to combine light paths to increase the brightness of the corresponding color in the combined light beams, for example, the light source part two 2 adopts a blue excitation light source, so that the brightness and the color brightness of blue light in the combined light beams can be increased. In one embodiment, the light emitted by the first light source part 1 may not include the light with the same color as the second light source part 2, specifically, for example, the first light source part 1 emits only red light and green light, so that when the light emitted by the first light source part 1 is converged into the combined light beam, only red light and green light in the combined light beam are supplemented, and part of the light emitted by the second light source part 2 is reflected by the reflection area 32 to be converged into the combined light beam, so that blue light in the combined light beam is supplemented. In another embodiment, the light emitted by the first light source part 1 includes light with the same color as the light emitted by the second light source part 2 but different in wavelength, specifically, the first light source part 1 emits red light, green light and blue light, the blue light and the blue light emitted by the second light source part 2 have different wavelengths, for example, the center wavelength of the blue light emitted by the first light source part 1 is 455nm, the center wavelength of the blue light emitted by the second light source part 2 is 465nm, so that the blue light emitted by the first light source part 1 and the blue light emitted by the second light source part 2 can be combined in a wavelength combining manner without loss, the overall brightness of the blue light in the combined light beam of the light source system is better improved, the light emitted by the first light source part 1 is transmitted from the first optical interface 41 and is converged in the combined light emitting direction, and the blue light emitted by the second light source part 2 reflected by the reflecting region 32 is reflected to the combined light emitting direction by the first optical interface 41 after being reflected by the first optical interface 41, and the blue light emitted by the second light source part 2 reflected by the reflecting region 32 is prevented from losing the combined light at the first light source part 2. More specifically, the optical interface one 41 transmits light in the wavelength range 635 to 645nm, 460 to 530nm, and reflects light in the wavelength range 530 to 620nm and 400 to 460 nm; the second optical interface 42 can directly adopt a reflector to reflect light with any visible wavelength; the third optical interface 43 transmits light having a wavelength range of 400 to 470nm and reflects light in other wavelength bands. In addition, the blue light emitted by the first light source part 1 and the blue light reflected by the reflective region 32 and emitted by the second light source part 2 can be combined at the first optical interface 41 by means of polarization combination, for example, the first optical interface 41 transmits the light in the P polarization state and reflects the light in the S polarization state, so that the blue light emitted by the first light source part 1 is in the P polarization state, and the blue light emitted by the second light source part 2 reflected by the reflective region 32 is in the S polarization state, thereby reliably realizing the light combination, and further the blue light emitted by the first light source part 1 and the blue light emitted by the second light source part 2 can be the same central wavelength.

In another embodiment shown in fig. 5 and fig. 6, the first light source part 1 and the second light source part 2 are integrated into a whole to emit light to the light combining component 4 in the same direction, so that the structure compactness can be better improved, the integration level is high, the volume is reduced, the preparation and the assembly are easy, and the cost is reduced. Specifically, the light emitted by the first light source part 1 and the light emitted by the second light source part 2 are emitted to the second optical interface 42 from top to bottom, the second optical interface 42 reflects the light emitted by the first light source part 1 to the first optical interface 41 at the left side, and the light emitted by the first light source part 1 is transmitted from the first optical interface 41 to be converged in the combined light emitting direction. The optical interface two 42 has a characteristic of partially transmitting and partially reflecting the light emitted by the light source part two 2, that is, a part of the light emitted by the light source part two 2 is reflected by the optical interface two 42 to the optical interface one 41 on the left side, and then the light emitted by the light source part two 2 is transmitted from the optical interface one 41 to be converged in the light-combining outgoing direction, so that a part of the light emitted by the light source part two 2 is directly used as a component part of the light-combining beam, the light emitted by the light source part two 2 can be blue light, so that the brightness of the blue light part in the light-combining beam can be increased, and the light emitted by the light source part one 1 can only contain red light and green light, and a sub-light source for emitting blue light is not required to be arranged; the other part of the light emitted by the second light source part 2 is transmitted from the second optical interface 42 and passes through the third optical interface 43 to be emitted to the lower side, the light emitted by the second light source part 2 is transmitted from the third optical interface 43 and passes through to be irradiated onto the wavelength conversion component 3, the wavelength conversion component 3 is excited to generate radiation fluorescence propagating in the opposite direction, and thus the other part of the light emitted by the second light source part 2 is used as an excitation light source to be excited and converted to generate radiation fluorescence in a broadband, and the radiation fluorescence can specifically include green light, red light, yellow light, orange light and the like. The radiation fluorescence generated by the wavelength conversion component 3 is emitted to the light combining component 4 in the direction of the radiation fluorescence, the divergence angle of the radiation fluorescence is larger, so that a collimating lens group 6 is arranged between the light combining component 4 and the wavelength conversion component 3, the radiation fluorescence is collimated and received by the collimating lens group 6, the radiation fluorescence passes through the collimating lens group 6 and irradiates on an optical interface I41 and an optical interface III 43, and then the radiation fluorescence is reflected to the light combining emission direction by the optical interface I41 and the optical interface III 43, so that the radiation fluorescence is combined with light emitted by the light source part I1 and part of light emitted by the light source part II 2. In one embodiment, the first optical interface 41 transmits the light emitted by the first light source part 1 and the light emitted by the second light source part 2 to reflect the radiant fluorescence, and specifically, the first optical interface 41 has the characteristics of transmitting light with the wavelength range of 635-645 nm, 510-530 nm and 440-470 nm and reflecting light with the wavelength range of 530-620 nm and 470-500 nm; the second optical interface 42 reflects red light and green light and partially reflects blue light, and may specifically have a transmittance of 50% for blue light, and the second optical interface 42 has a transflective property for reflecting light with a wavelength greater than 500nm and a transflective property for light with a wavelength less than 470 nm; the third optical interface 43 transmits the light emitted by the second light source unit 2 and reflects the radiated fluorescence, and specifically, the third optical interface 43 transmits blue light and reflects visible light of other wavelength bands, and specifically, the third optical interface 43 has a transmission and reflection characteristic of reflecting light with a wavelength of more than 500nm and transmitting light with a wavelength of less than 470 nm. And a converging lens group 7 and a light homogenizing device 8 are arranged on a light path of the combined light, and the converging lens group 7 receives the combined light beam so that the combined light beam is converged into the light homogenizing device 8 for light homogenizing treatment, and the light emitting quality is better improved.

The wavelength conversion element 3 may adopt a static ceramic fluorescent sheet, so that only a single color of radiant fluorescence is generated when the wavelength conversion element 3 is irradiated by the light emitted by the light source part two 2, specifically, the wavelength conversion element 3 generates yellow or orange radiant fluorescence when irradiated; the wavelength conversion component 3 may be dynamically movable, a wavelength conversion region is disposed on the wavelength conversion component 3, and the wavelength conversion region may specifically include a plurality of different sub-partitions distributed along a circumferential direction of the wavelength conversion component 3, for example, the wavelength conversion component 3 is driven by a motor to perform rotational movement, so that the sub-partitions are distributed along a rotational circumferential direction, and when the wavelength conversion component 3 rotates, each sub-partition is sequentially switched to an optical path to be irradiated by light emitted by the light source part two 2, so as to sequentially generate radiant fluorescence with different colors.

In one embodiment, as shown in fig. 6, the first light source part 1 and the second light source part 2 are integrated, the first light source part 1 includes a first sub-light source 11, a second sub-light source 12 and a beam splitting and expanding component 5, specifically, the first sub-light source 11 emits green laser, the second sub-light source 12 emits red laser, the beam splitting and expanding component 5 includes a first beam splitting device 51 and a second beam splitting device 52, the first beam splitting device 51 includes at least two beam splitting interfaces 511 arranged side by side, each beam splitting interface 511 has different reflectivities for the light emitted by the second sub-light source 12, the light emitted by the first sub-light source 11 sequentially passes through the first beam splitting interface 511 to split a plurality of sub-light rays, the second beam splitting device 52 includes at least two beam splitting interfaces 521 arranged side by side, each beam splitting interface 521 has different reflectivities for the light emitted by the second sub-light source 12, the light emitted by the second sub-light source 12 sequentially passes through the second beam splitting interface 521 to split a plurality of sub-light rays, and the number of the light rays emitted by the second sub-light source is identical to the number of sub-light rays. Further, in order to improve the compactness of the structure and reduce the occupied volume, as shown in fig. 6, the second beam splitting interface 521 is directly used to realize the light combination, the first sub-beam is directed to the second beam splitting device 52, and the second beam splitting interface 521 transmits the light emitted by the second sub-light source 12 to make the first sub-beam and the second sub-beam combine to emit. Preferably, the beam splitting and expanding assembly 5 further includes a microlens array 53, and the microlens array 53 is disposed on the optical path from the first beam splitting device 51 to the second beam splitting device 52. The first sub-light and the second sub-light are uniformly mixed by utilizing the micro-lens array 53, so that the first sub-light and the second sub-light are more fully and uniformly mixed, and the micro-lens array can be used for dissipation and reducing the speckle condition during projection. Further, the beam splitting and expanding assembly 5 further includes a dissipation element 54, where the dissipation element 54 is disposed on the light-combining outgoing light path of the first sub-ray and the second sub-ray. The dissipation element is used for further dissipating the combined light of the sub-light I and the sub-light II so as to reduce the speckle condition during projection, specifically, the dissipation element 54 is a dynamically movable diffusion sheet or a micro lens, the dissipation means comprises diffusion treatment or light homogenizing treatment, the dynamic movement can be specifically rotation, vibration and the like, and the coherence of the emitted light can be better reduced by adopting a dynamic dissipation mode so as to effectively reduce the speckle condition. Further, the light emitted from the second light source 2 is directed to the second light splitting interface 521, and the second light splitting interface 521 totally reflects the light emitted from the second light source 2, so that the light emitted from the second light source 2 and the combined light beams of the first sub-light and the second sub-light are emitted in the same direction.

In another embodiment shown in fig. 7, the first light source unit 1 and the second light source unit 2 are integrated into a whole to emit light to the light combining component 4 in the same direction, and, compared with the embodiment shown in fig. 6, the directions of the first light source unit 1 and the second light source unit 2 are changed, the light emitted by the first light source unit 1 and the light emitted by the second light source unit 2 are emitted from right to left to the second optical interface 42, the light emitted by the first light source unit 1 is transmitted from the second optical interface 42 to the first optical interface 41 on the left, and then the light emitted by the first light source unit 1 is transmitted from the first optical interface 41 to be emitted to be converged in the light combining exit direction; and all or a part of the light emitted by the second light source part 2 is reflected by the second optical interface 42 and guided to the third optical interface 43, the third optical interface 43 transmits the light emitted by the second light source part 2 to the wavelength conversion component 3, the wavelength conversion component 3 is irradiated to excite to generate radiant fluorescence, the radiant fluorescence reversely exits to the first optical interface 41 and the third optical interface 43 of the light combining component 4, and then the first optical interface 41 and the third optical interface 43 reflect the radiant fluorescence to the combined light exit direction, so that the radiant fluorescence is combined into the combined light beam. In the present embodiment, the transflective property of the optical interface one 41 is light having a transmission wavelength range of 635 to 645nm, 510 to 530nm, and 440 to 470nm, and light having a reflection wavelength range of 530 to 620nm and 470 to 500 nm; the second optical interface 42 is partially transmissive and partially reflective to blue light, specifically, the transmittance to blue light is 50%, specifically, the transmittance and reflective characteristics of the second optical interface 42 are that the light with the transmission wavelength of more than 500nm is semi-transmissive and semi-reflective to the light with the wavelength of less than 470 nm; the third optical interface 43 transmits the light emitted by the second light source unit 2 and reflects the radiated fluorescence, and specifically, the third optical interface 43 transmits blue light and reflects visible light of other wavelength bands, and specifically, the third optical interface 43 has a transmission and reflection characteristic of reflecting light with a wavelength of more than 500nm and transmitting light with a wavelength of less than 470 nm. The integrated structure of the first light source part 1 and the second light source part 2 can adopt the structure form shown in fig. 6. The wavelength conversion element 3 may be of static or dynamic construction.

In another embodiment shown in fig. 8, the first light source part 1 and the second light source part 2 emit light in the same direction, the light emitted from the first light source part 1 enters the light combining component 4 from top to bottom to be guided by the light combining component 4 in the light path, and the light emitted from the second light source part 2 is emitted to the wavelength converting component 3 without passing through the light combining component 4. Specifically, the wavelength conversion component 3 may be in a dynamic structure, where the wavelength conversion component 3 is provided with a wavelength conversion region 31 and a reflection region 32 distributed along a circumferential direction, for example, the wavelength conversion component 3 is driven by a motor to perform rotational movement, as shown in fig. 4, the wavelength conversion region 31 and the reflection region 32 are distributed along a rotational circumferential direction, the wavelength conversion region 31 may specifically include a plurality of different sub-regions, where when irradiated by excitation light, the different sub-regions generate radiant fluorescence of different colors, respectively, when the wavelength conversion component 3 rotates, the wavelength conversion region 31 and the reflection region 32 are sequentially switched onto an optical path to be irradiated by light emitted by the light source portion 2, when the wavelength conversion region 31 is switched onto the optical path, the wavelength conversion region 31 is irradiated to generate radiant fluorescence, and when the reflection region 32 is switched onto the optical path, the reflection region 32 reflects the light emitted by the light source portion 2. The collimating lens group 6 is arranged between the light combining component 4 and the wavelength conversion component 3, the light emitted by the light source part two 2 enters the collimating lens group 6 off-axis and then is irradiated onto the wavelength conversion component 3, after the converging action of the collimating lens group 6, the light emitted by the light source part two 2 is irradiated onto the wavelength conversion component 3 in an inclined state, when the reflecting area 32 is switched to a light path, the obliquely incident light is obliquely reflected by the reflecting area 32 and is reversely incident into the collimating lens group 6 in an inclined state, the light of the light source part two 2 reversely emitted from the collimating lens group 6 is off-axis under the collimating action of the collimating lens group 6, and the light of the light source part two 2 reversely emitted from the collimating lens group 6 is translated relative to the light emitted by the light source part two 2 originally entering the collimating lens group 6, so that the light path separation of the light path is realized, the light of the light source part two 2 reversely emitted from the collimating lens group 6 is not returned to the light source part two 2 along the incident direction, and the light beam can be conveniently converged by the light beam 2, and the light of the light path can be effectively converged by the light beam 2.

Further, in the present embodiment, the light combining component 4 includes an optical interface one 41, an optical interface two 42, an optical interface three 43, an optical interface four 44 and an optical interface five 45, wherein the optical interface one 41, the optical interface two 42, the optical interface three 43 and the optical interface four 44 are sequentially arranged at a predetermined angle along the circumference of the center point, the surface directions of the four are along the radial direction, specifically, the four are distributed in an X shape, the included angle between the adjacent optical interfaces may be 90 °, and the optical interface five 45 is disposed in the area between the optical interface one 41 and the optical interface four 44, and in contrast, the size of the optical interface five 45 is smaller than the size of the optical interface one 41 and the optical interface four 44. The light emitted by the first light source part 1 comprises red light and green light, the second light source part 2 emits blue light, the light emitted by the first light source part 1 is incident to the second optical interface 42 at an incident angle of 45 degrees, wherein the first optical interface 41 transmits the light emitted by the first light source part 1 and reflects the radiant fluorescence and the light emitted by the second light source part 2, and the specific transmission and reflection characteristics of the first optical interface 41 are that the light with the transmission wavelength range of 635-645 nm and 510-530 nm and the light with the reflection wavelength range of 440-500 nm and 530-620 nm; the second optical interface 42 needs to reflect and guide the light emitted by the first light source part 1 to the first optical interface 41, and since the light emitted by the second light source part 2 is not guided to the wavelength conversion component 3 by the light combination component 4, the second optical interface 42 can directly adopt a reflecting sheet, and is plated with a total reflection film to reflect all visible light; the third optical interface 43 needs to reflect and guide the radiant fluorescence in the emergent direction of the combined light, and the light emitted by the second light source part 2 is not guided to the wavelength conversion component 3 by the combined light component 4, so that the third optical interface 43 can directly adopt a reflecting sheet and is plated with a total reflection film so as to reflect all visible light; the light reflected by the reflection area 32 of the wavelength conversion component 3 is reversely emitted to the fourth optical interface 44 from the collimation lens group 6 in an off-axis state after being collimated by the collimation lens group 6, the divergence angle of the radiant fluorescence generated by the wavelength conversion component 3 is larger, so that the radiant fluorescence can also be emitted to the fourth optical interface 44, the radiant fluorescence and the light reflected by the reflection area 32 of the wavelength conversion component 3 need to pass through the fourth optical interface 44, the fourth optical interface 44 transmits the radiant fluorescence and the light of the second light source part 2 reflected by the reflection area 32 of the wavelength conversion component 3, and the specific transmission and reflection characteristics of the fourth optical interface 44 are that the light with the reflection wavelength range of 635-645 nm and the light with the reflection wavelength range of 510-530 nm are transmitted; the fifth optical interface 45 is required to reflect the light reflected by the reflection area 32 of the wavelength conversion device 3 to guide the light to the outgoing direction of the combined light, the fifth optical interface 45 transmits the light of other wavelength bands, and the specific transflective characteristic of the fifth optical interface 45 is to reflect the light with the wavelength range of 440-470 nm and transmit the light with the other wavelength ranges. Finally, the three parts of the radiation fluorescence, the light emitted by the first light source part 1 and a part of the light emitted by the second light source part 2 are combined through the light combining component 4, a converging lens group 7 and a light homogenizing device 8 are arranged on a combined light emergent light path, and the converging lens group 7 receives the combined light beam so that the combined light beam is converged into the light homogenizing device 8 to be subjected to light homogenizing treatment, and the light emitting quality is better improved.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims (13)

1. The utility model provides a light source system, its characterized in that includes light source portion one (1), light source portion two (2), wavelength conversion subassembly (3) and light combination subassembly (4), light combination subassembly (4) include a plurality of optical interface, the circumference interval distribution of optical interface along a central point, the surface direction of optical interface is along radial, and each optical interface has different transmission reflection characteristic respectively, light that light source portion one (1) sent is by light combination subassembly (4) guide to the light combination outgoing direction, wavelength conversion subassembly (3) are shone with excitation by light source portion two (2) and are produced the radiation fluorescence, the radiation fluorescence is by light combination subassembly (4) guide to the light combination outgoing direction.

2. The light source system according to claim 1, wherein the light combining component (4) comprises a first optical interface (41), a second optical interface (42) and a third optical interface (43) which are sequentially distributed at a predetermined angle along the circumferential direction of the center point, and the light emitted by the first light source part (1) is obliquely incident to the second optical interface (42);

The light emitted by the first light source part (1) is guided to the first optical interface (41) through the second optical interface (42);

The first optical interface (41) transmits the light emitted by the first light source part (1) to the combined light emergent direction;

the radiation fluorescence generated by excitation of the wavelength conversion component (3) is reflected to the combined light emergent direction by the first optical interface (41) and the third optical interface (43).

3. The light source system according to claim 2, wherein the light emitted by the second light source part (2) is obliquely incident to the second optical interface (42), and all or a part of the light emitted by the second light source part (2) is guided to the third optical interface (43) through the second optical interface (42), and the third optical interface (43) transmits the light emitted by the second light source part (2) to the wavelength conversion component (3).

4. The light source system according to claim 1, wherein a collimating lens group (6) is disposed between the light combining component (4) and the wavelength converting component (3), the light emitted by the light source part two (2) enters the collimating lens group (6) off-axis, the wavelength converting component (3) dynamically moves, the wavelength converting component (3) is provided with a wavelength converting region (31) and a reflecting region (32) distributed along the circumferential direction, the light of the light source part two (2) reflected by the reflecting region (32) of the wavelength converting component (3) is reversely emitted from the collimating lens group (6) off-axis, and the light of the light source part two (2) emitted from the collimating lens group (6) is reflected by the light combining component (4) and guided to the combined light emitting direction.

5. The light source system according to claim 1, wherein the light emitted by the second light source unit (2) is directed to the light combining component (4), and all or a part of the light emitted by the second light source unit (2) is guided by the light combining component (4) to the wavelength conversion component (3) to excite and generate radiant fluorescence.

6. The light source system according to claim 1, wherein the first light source part (1) comprises a first sub-light source (11), a second sub-light source (12) and a beam-splitting and beam-expanding assembly (5), the beam-splitting and beam-expanding assembly (5) comprises a first beam-splitting device (51) and a second beam-splitting device (52), the first beam-splitting device (51) comprises at least two first beam-splitting interfaces (511), each first beam-splitting interface (511) has different reflectivities for light emitted by the second sub-light source (12), the light emitted by the first sub-light source (11) sequentially passes through the first light splitting interface (511) to split a plurality of first sub-light rays, the second light splitting device (52) comprises at least two second light splitting interfaces (521), each second light splitting interface (521) has different reflectivities for the light emitted by the second sub-light source (12), the light emitted by the second sub-light source (12) sequentially passes through the second light splitting interfaces (521) to split a plurality of second sub-light rays, and the first sub-light rays and the second sub-light rays are combined to emit light.

7. The light source system according to claim 6, wherein the first sub-ray is directed to the second beam splitter (52), and the second beam splitting interface (521) transmits the light emitted by the second sub-light source (12) to make the first sub-ray and the second sub-ray combine to emit light.

8. The light source system according to claim 7, wherein the beam-splitting and beam-expanding assembly (5) further comprises a microlens array (53), the microlens array (53) being arranged on the light path of the sub-light rays from the first beam-splitting device (51) to the second beam-splitting device (52), and/or the microlens array (53) being arranged on the outgoing light path of the second beam-splitting device (52).

9. The light source system according to claim 6, wherein the beam splitting and expanding assembly (5) further comprises a dissipating element (54), and the dissipating element (54) is disposed on the light-combining outgoing light path of the first sub-ray and the second sub-ray.

10. A light source system according to claim 9, characterized in that the dissipating element (54) is a dynamically movable diffuser or a micro lens.

11. The light source system according to claim 6, wherein the first light splitting device (51) comprises at least one light-transmitting flat sheet, both side surfaces of the light-transmitting flat sheet are coated to constitute the first light splitting interface (511), and the second light splitting device (52) comprises at least one light-transmitting flat sheet, both side surfaces of the light-transmitting flat sheet are coated to constitute the second light splitting interface (521).

12. The light source system according to claim 1, wherein the first light source part (1) and the second light source part (2) are integrated into a whole to emit light in the same direction.

13. The light source system according to claim 1, wherein the light emitted from the first light source unit (1) includes light of the same color as the light emitted from the second light source unit (2) but different in wavelength.