CN216772180U - Light source device and laser projection apparatus - Google Patents

Abstract

The utility model provides a light source device and laser projection equipment. The main light source assembly is used for emitting a first color laser beam, a second color laser beam and a third color laser beam; the light combining mirror assembly is positioned on one side of the light outlet of the main light source assembly and comprises a plurality of light combining lenses; the lens assembly comprises one or more first lens structures for converging light rays; and the other third color laser beam reflected and transmitted by the light combining lens and the second color laser beam reflected by the light combining lens are combined into a second beam to be emitted into the lens assembly. The light source device of the technical scheme of the utility model can improve the display quality of the projection picture of the projection equipment.

Description

Light source device and laser projection equipment

Technical Field

The utility model relates to the technical field of projection equipment, in particular to a light source device and laser projection equipment.

Background

At present, a laser display system mainly comprises an optical engine, a heat dissipation system, an electronic control system, a sealing structure and the like. Of these compositions, the most important is the optical engine part. The optical engine consists of a light source and an optical machine, wherein the light source part is used for providing illumination for the optical machine, the optical machine part is used for modulating illumination light beams, and the modulated light beams are emitted through the lens to form a projection picture.

In a three-color laser illumination system, three kinds of laser light are mostly separated, and are generally combined by a dichroic mirror or an X-prism. However, the overlapping degree of the light spots formed by the light combining method of the light source device in the prior art is low, which reduces the color uniformity of the light combining light spots, and thus the display quality of the projection picture is poor.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a light source device and a laser projection apparatus, which can improve the display quality of a projection screen of the projection apparatus.

In order to achieve the above object, according to an aspect of the present invention, there is provided a light source device including: the main light source assembly is used for emitting a first color laser beam with a first wavelength, a second color laser beam with a second wavelength and a third color laser beam with a third wavelength, and the ranges of the first wavelength, the second wavelength and the third wavelength are different; the light combining mirror assembly is positioned on one side of the light outlet of the main light source assembly and comprises a plurality of light combining lenses; a lens assembly comprising one or more first lens structures for converging light rays; the laser device comprises a light-combining lens, a first color laser beam, a second color laser beam, a third color laser beam, a fourth color laser beam, a fifth color laser beam, a sixth color laser beam, a fifth color laser beam, a sixth color laser beam, a fifth color laser beam, a lens, a fifth color laser beam, a lens, a fifth color laser beam, a lens; or, one third color laser beam reflected by the light combining lens and the first color laser beam reflected and transmitted by the light combining lens are combined into a first light beam to be incident to the lens assembly, and the other third color laser beam reflected by the light combining lens and the second color laser beam reflected and transmitted by the light combining lens are combined into a second light beam to be incident to the lens assembly.

Further, the plurality of light combining lenses comprise a first light combining lens and a second light combining lens which are arranged at intervals along the first direction, the first light combining lens is used for reflecting the first color laser beam and the second color laser beam and transmitting the third color laser beam, and the second light combining lens is used for reflecting the third color laser beam; or the first light combining lens is used for reflecting the third color laser beam and transmitting the first color laser beam and the second color laser beam, and the second light combining lens is used for reflecting the first color laser beam and the second color laser beam.

Further, the area of a light spot formed by the first color laser beam and the second color laser beam is smaller than or equal to the area of a light spot formed by the two third color laser beams; or the area of a light spot formed by the first color laser beam and the second color laser beam is larger than or equal to the area of a light spot formed by the two third color laser beams.

Further, the main light source assembly comprises a first laser unit, a second laser unit and at least two third laser units, wherein the first laser unit is used for a first color laser beam, the second laser unit is used for a second color laser beam, and the third laser unit is used for emitting a third color laser beam.

Further, the distance between the first laser unit and the second laser unit is equal to the distance between the two third laser units, the plurality of light combining lenses include a first light combining lens and a second light combining lens which are arranged at intervals along the first direction, the first light combining lens and the second light combining lens are arranged in an inclined and parallel manner, the sum of the distance between the first light combining lens and the second light combining lens and the thickness of the first light combining lens in the first direction is equal to the distance between the third laser unit close to the second laser unit and the first laser unit in the two third laser units, and/or the sum of the distance between the first light combining lens and the second light combining lens and the thickness of the first light combining lens in the first direction is equal to the distance between the third laser unit far away from the second laser unit and the second laser unit in the two third laser units.

Further, the light source device further includes: the auxiliary light source assembly comprises a light source for emitting a third light beam, the third light beam is a wide spectrum light, and the first color laser light beam, the second color laser light beam and the third color laser light beam are narrow spectrum light; the coupling structure is positioned on the optical path propagation path of the third light beam, positioned on the optical path propagation paths of the first light beam and the second light beam and used for reflecting the first light beam and the second light beam and transmitting the third light beam; alternatively, the coupling structure is adapted to transmit the first and second light beams and to reflect the third light beam.

Further, when the coupling structure is configured to reflect the first light beam and the second light beam and transmit the third light beam, the coupling structure is configured to transmit a portion of the third light beam within a first predetermined wavelength range and transmit a portion of the third light beam in a first polarization state within a second predetermined wavelength range, and the coupling structure is configured to reflect the first light beam and the second light beam in a second polarization state within the second predetermined wavelength range, wherein a maximum value in the second predetermined wavelength range is smaller than or equal to a minimum value in the first predetermined wavelength range.

Further, the light source device further comprises one or more second lens structures arranged at intervals between the auxiliary light source assembly and the coupling structure, and the second lens structures are used for converging light rays.

Further, the light source device further includes: the light guide assembly is positioned on the propagation paths of the first light beam and the second light beam, and the first light beam and the second light beam are reflected or transmitted by the light guide assembly and then enter the lens assembly; the shaping component is positioned between the light combining mirror component and the light guide component and is used for eliminating the polarization of the light beam and/or homogenizing the light beam; a spot-dissipating assembly including a diffuser rotatably disposed relative to the lens assembly for diffusing the light beam emitted from the lens assembly.

Furthermore, the shaping assembly comprises a depolarization structure and a first dodging structure positioned on one side of the depolarization structure, the depolarization structure is used for eliminating polarization of light beams, the first dodging structure is used for homogenizing the light beams, and the depolarization structure and the first dodging structure are arranged in a split mode or are integrally formed; alternatively, the light directing component is a reflector.

Further, the light source device comprises two main light source components which are arranged vertically to each other and two light combining mirror components which are arranged corresponding to the two main light source components so as to combine the two first light beams and the two second light beams; the light source device further comprises a third light combining lens, the third light combining lens and the plurality of light combining lenses of one of the two light combining lens components are arranged at intervals and in parallel along the first direction, the third light combining lens is positioned on the optical axis of the other light combining lens component of the two light combining lens components, and the third light combining lens is positioned on the optical axis of the lens component; or the light source device comprises two main light source components which are arranged vertically and two light combining mirror components which are arranged corresponding to the two main light source components so as to combine two first light beams and two second light beams; the light source device further comprises a third light combining lens, the third light combining lens is used for transmitting the first light beam and the second light beam combined by one of the two light combining lens components, and the third light combining lens is used for reflecting the first light beam and the second light beam combined by the other of the two light combining lens components.

Further, the light source device comprises two main light source components arranged in parallel and two light combining mirror components arranged corresponding to the two main light source components so as to combine two first light beams and two second light beams; the light source device further comprises a third light combining lens and a fourth light combining lens arranged at intervals with the third light combining lens along the second direction, the third light combining lens and the plurality of light combining lenses of one light combining lens assembly in the two light combining lens assemblies are arranged at intervals and in parallel along the first direction, the fourth light combining lens and the plurality of light combining lenses of the other light combining lens assembly in the two light combining lens assemblies are arranged at intervals and in parallel along the first direction, the third light combining lens and the fourth light combining lens are both positioned on the optical axis of the lens assemblies, the reflection normal line of the third light combining lens and the reflection normal line of the fourth light combining lens are arranged perpendicularly, and the second direction is arranged perpendicularly to the first direction; or the light source device comprises two main light source components arranged in parallel and two light combining mirror components arranged corresponding to the two main light source components so as to combine two first light beams and two second light beams; the light source device also comprises a third light combining lens and a fourth light combining lens which is arranged at an interval with the third light combining lens along a second direction, a first light beam and a second light beam which are combined by one of the two light combining lens components are reflected by the fourth light combining lens in sequence, transmitted by the third light combining lens and then emitted into the lens component, and a first light beam and a second light beam which are combined by the other of the two light combining lens components are reflected by the third light combining lens and then emitted into the lens component; or the first light beam and the second light beam synthesized by one of the two light combining mirror assemblies are reflected by the third light combining lens and transmitted by the fourth light combining lens in sequence and then enter the lens assembly, and the first light beam and the second light beam synthesized by the other of the two light combining mirror assemblies are reflected by the fourth light combining lens and then enter the lens assembly.

Further, the light source device further comprises a first phase retarder, the first phase retarder is used for changing the polarization directions of the first color laser beam and the second color laser beam, and the first phase retarder is located on one side, facing the light combining mirror assembly, of the first laser unit and the second laser unit; or, the light source device further comprises a second phase retarder for changing the polarization direction of the two third color laser beams, and the second phase retarder is positioned on the side, facing the light combining mirror assembly, of the third laser unit.

According to another aspect of the present invention, there is provided a laser projection apparatus including the light source device described above.

By applying the technical scheme of the utility model, the plurality of light combination lenses are arranged, the first color laser beam and the third color laser beam are reflected and transmitted by the plurality of light combination lenses to be combined into the first light beam and then enter the lens component, and the second color laser beam and the other third color laser beam are reflected and transmitted by the plurality of light combination lenses to be combined into the second light beam and then enter the lens component, so that the two laser beams with different colors can be combined into a beam, the superposition degree of light spots is improved, the color uniformity of the light combination light spots is improved, and the display quality of a projection picture of the projection equipment is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a light source device according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a light source device according to a second embodiment of the present invention;

fig. 3a shows a schematic structural view of an integrated formation of the depolarizing structure and the first light unifying structure of the light source device of fig. 2;

fig. 3b is a schematic structural diagram illustrating a split arrangement of the depolarization structure and the first dodging structure of the light source device of fig. 2;

FIG. 4 shows a graph of the spectra of green laser and green LED light for an embodiment of the utility model;

FIG. 5 shows a transmission spectrum plot of an optical filter of an embodiment of the present invention;

FIG. 6 shows a transmission spectrum plot of a polarization splitting film of an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a light source device according to a third embodiment of the present invention; and

fig. 8 is a schematic structural diagram of a light source device according to a fourth embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a light-combining mirror assembly; 11. a first phase retarder; 12. a second light combining lens; 13. a first light combining lens; 14. a shaping component; 141. a depolarization structure; 142. a first light uniformizing structure; 15. a second phase retarder; 20. a second lens structure; 21. an auxiliary light source assembly; 23. a third light combining lens; 24. a fourth light combining lens; 30. a lens assembly; 31. a coupling structure; 32. a first lens structure; 35. a light directing assembly; 36. a diffuser; 41. a fourth lens structure; 42. a reflective structure; 43. a third lens structure; 50. a primary light source assembly; 51. a first laser unit; 52. a second laser unit; 53. a third laser unit; 60. a lighting assembly; 61. a light valve; 70. an imaging assembly.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In the embodiment of the present invention, the parallel arrangement refers to parallel with error; the vertical setting refers to a vertical with error.

As shown in fig. 1, a light source device is provided according to a first embodiment of the present invention. The light source device comprises a main light source assembly 50, a light combining lens assembly 10 and a lens assembly 30. The main light source assembly 50 is configured to emit a first color laser beam with a first wavelength, a second color laser beam with a second wavelength, and a third color laser beam with a third wavelength, where the ranges of the first wavelength, the second wavelength, and the third wavelength are different; the light combining mirror assembly 10 is located on one side of the light outlet of the main light source assembly 50, and the light combining mirror assembly 10 includes a plurality of light combining mirrors arranged at intervals; the lens assembly 30 includes one or more first lens structures 32 for converging light, and the plurality of first lens structures 32 are sequentially arranged at intervals; the third color laser beam reflected and transmitted by the plurality of light combining lenses and the first color laser beam reflected by the plurality of light combining lenses are combined into a first beam to be incident into the lens assembly 30, and the other third color laser beam reflected and transmitted by the plurality of light combining lenses and the second color laser beam reflected by the plurality of light combining lenses are combined into a second beam to be incident into the lens assembly 30.

In the above technical solution, by setting a plurality of light combining lenses, the first color laser beam and the third color laser beam are reflected and transmitted by the plurality of light combining lenses to be combined into the first light beam and then enter the lens assembly 30, the second color laser beam and the third color laser beam are reflected and transmitted by the plurality of light combining lenses to be combined into the second light beam and then enter the lens assembly 30, so that the two laser beams with different colors can be combined into one beam, thereby improving the overlapping degree of the light spots, further improving the color uniformity of the light combining light spots, and further improving the display quality of the projection image of the projection device.

Specifically, in the first embodiment of the present invention, the main light source assembly 50 includes a first laser unit 51, a second laser unit 52 and two third laser units 53, which are arranged at intervals, wherein the first laser unit 51 is configured to emit a first color laser beam, the second laser unit 52 is configured to emit a second color laser beam, and the third laser unit 53 is configured to emit a third color laser beam.

Of course, in an alternative embodiment not shown in the drawings, a first light beam is synthesized by one third color laser beam reflected by the plurality of light combining lenses and the first color laser beam reflected and transmitted by the plurality of light combining lenses and is incident on the lens assembly 30, another third color laser beam reflected by the plurality of light combining lenses and the second color laser beam reflected and transmitted by the plurality of light combining lenses are synthesized into a second light beam which is incident on the lens assembly 30, that is, the two third laser units 53 in fig. 1 may be disposed above the first laser unit 51 and the second laser unit 52.

Preferably, in the first embodiment of the present invention, the first laser unit 51, the second laser unit 52, and the third laser unit 53 are lasers.

Specifically, in the first embodiment of the present invention, the first light beam and the second light beam enter the lens assembly 30, and are converged by the lens assembly 30 and then emitted from the outlet of the light source device.

In a first embodiment of the present invention, the first color laser beam is a green laser beam, the second color laser beam is a blue laser beam, and the third color laser beam is a red laser beam. Of course, in alternative embodiments, the colors of the first color laser beam, the second color laser beam, and the third color laser beam are not limited as long as they are one of three colors of red, green, and blue, respectively.

Preferably, as shown in fig. 1, in the first embodiment of the present invention, the number of the first lens structures 32 is two, one of the two first lens structures 32 is a spherical lens, and the other of the two first lens structures 32 is an aspheric lens.

Of course, in an embodiment not shown in the drawings, the two first lens structures 32 may be two spherical lenses or two aspherical lenses as long as they can perform a converging function.

Of course, in embodiments not shown in the drawings, the number of first lens structures 32 may also be three or four, etc.

As shown in fig. 1, in the first embodiment of the present invention, a distance between the first laser unit 51 and the second laser unit 52 is equal to a distance between the two third laser units 53, the plurality of light combining lenses include a first light combining lens 13 and a second light combining lens 12 that are disposed at an interval along the first direction, the first light combining lens 13 and the second light combining lens 12 are disposed in an inclined and parallel manner, a sum of a distance between the first light combining lens 13 and the second light combining lens 12 and a thickness of the first light combining lens 13 in the first direction is equal to a distance between a third laser unit 53 of the two third laser units 53 that is close to the second laser unit 52 and the first laser unit 51, and/or the sum of the distance between the first light combining lens 13 and the second light combining lens 12 and the thickness of the first light combining lens 13 in the first direction is equal to the distance between the third laser unit 53 far away from the second laser unit 52 and the second laser unit 52 in the two third laser units 53.

Through the arrangement, the first color laser beam and the second color laser beam can be reflected by the first light combining lens 13 and then enter the lens assembly 30, one of the two third color laser beams is reflected by the second light combining lens 12 in sequence and transmitted by the first light combining lens 13 and then coaxially exits with the first color laser beam to form the first light beam, and the other of the two third color laser beams is reflected by the second light combining lens 12 in sequence and transmitted by the first light combining lens 13 and then coaxially exits with the second color laser beam to form the second light beam.

In the first embodiment of the present invention, the first light combining lens 13 and the second light combining lens 12 are disposed in parallel, which means that the first light combining lens 13 and the second light combining lens 12 are disposed in parallel as much as possible in actual installation, that is, in an ideal state, the first light combining lens 13 and the second light combining lens 12 are disposed in parallel.

Specifically, in the first embodiment of the present invention, the first light combining lens 13 and the second light combining lens 12 are both disposed obliquely with respect to the propagation path of the first color laser beam, the second color laser beam, or the third color laser beam, and the inclination angle is preferably 45 °, so that the first light beam and the second light beam can be better formed.

Specifically, the embodiment of the utility model is only provided with two light combining lenses, so that the light combining mode is simpler, the size is smaller and the light effect is higher compared with the traditional light combining mode in which each color laser beam corresponds to one light combining lens.

Of course, in alternative embodiments not shown in the drawings, three or four light combining lenses may also be provided.

As shown in fig. 1, in a first embodiment of the present invention, the plurality of light combining lenses include a first light combining lens 13 and a second light combining lens 12 that are disposed at intervals along the first direction, the first light combining lens 13 is configured to reflect the first color laser beam and the second color laser beam and transmit the third color laser beam, and the second light combining lens 12 is configured to reflect the third color laser beam.

Through the above arrangement, one of the two laser beams of the third color is reflected by the second light combining lens 12 and transmitted by the first light combining lens 13 in sequence, and then coaxially emits out with the laser beam of the first color reflected by the first light combining lens 13 to form a first light beam, and the other laser beam of the two laser beams of the third color is reflected by the second light combining lens 12 in sequence, transmitted by the first light combining lens 13, and then coaxially emits out with the laser beam of the second color reflected by the first light combining lens 13 to form a second light beam. That is, the optical axis of the first color laser beam emitted by the first laser unit coincides with the optical axis of the third color laser beam emitted by one of the third laser units, and the optical axis of the second color laser beam emitted by the second laser unit coincides with the optical axis of the third color laser beam emitted by the other of the third laser units.

Of course, in an alternative embodiment not shown in the drawings, the first light combining lens 13 may also be used for reflecting the third color laser beam and transmitting the first color laser beam and the second color laser beam, and the second light combining lens 12 may also be used for reflecting the first color laser beam and the second color laser beam. Therefore, the laser beams with two different colors can be combined into one beam, so that the contact ratio of light spots is improved, the color uniformity of the light combining light spots is improved, and the display quality of a projection picture is improved.

In the first embodiment of the present invention, the area of the light spot formed by the first color laser beam and the second color laser beam is equal to the area of the light spot formed by the two third color laser beams.

Through the arrangement, the contact ratio of the two light spots can be improved as much as possible, and the color uniformity of the light combining light spots is further improved so as to improve the display quality of the projection picture.

Of course, in alternative embodiments, the spot area formed by the first color laser beam and the second color laser beam may also be smaller than the spot area formed by the two third color laser beams. As long as the coincidence of the two spots can be achieved.

Of course, in alternative embodiments, the spot area formed by the first color laser beam and the second color laser beam may be larger than the spot area formed by the two third color laser beams. As long as the coincidence of the two spots can be achieved.

In the first embodiment of the present invention, the above-mentioned equality refers to an equality with an error, and not an absolute equality.

It should be noted that, in the first embodiment of the present invention, the fact that the area of the light spot formed by the first color laser beam and the second color laser beam is equal to the area of the light spot formed by the two third color laser beams means: the light spots formed by the first color laser beams and the second color laser beams can be superposed with the light spots formed by the two third color laser beams, that is, the light spots formed by the first color laser beams and the second color laser beams are coaxial with the light spots formed by the two third color laser beams, the areas of the two light spots are as close as possible under the actual condition, and the areas of the two light spots are equal under the ideal condition.

Preferably, in the first embodiment of the present invention, the reflection normal of the first light combining lens 13 and the reflection normal of the second light combining lens 12 are arranged in parallel, so that the overlapping degree of the light spots can be improved, the color uniformity of the light combining light spots is improved, and the display quality of the projection picture is improved.

Preferably, in the first embodiment of the present invention, the light reflected by the first light combining lens 13 and the light reflected by the second light combining lens 12 are collinear, so that the first color laser beam and one of the two third color laser beams can be collinear, and the second color laser beam and the other of the two third color laser beams can be collinear, thereby improving the overlapping ratio of the light spots.

As shown in fig. 1, in the first embodiment of the present invention, the light source device further includes an auxiliary light source assembly 21 and a coupling structure 31. The auxiliary light source assembly 21 includes a light source for emitting a third light beam, the third light beam is a wide-spectrum light, and the first color laser light beam, the second color laser light beam and the third color laser light beam are narrow-spectrum light; the coupling structure 31 is located on the optical path propagation path of the third light beam and the coupling structure 31 is located on the optical path propagation paths of the first and second light beams, the coupling structure 31 being adapted to reflect the first and second light beams and to transmit the third light beam.

Among the above-mentioned technical scheme, through setting up auxiliary light source subassembly 21 and coupling structure 31 to the light beam that sends auxiliary light source subassembly 21 and the light beam that main light source subassembly 50 sent are coupled, can be like this promote the luminance of the light beam of inciting into lens subassembly 30, and reduce the speckle.

Of course, in an alternative embodiment not shown in the drawings, the coupling structure 31 may also be used for transmitting the first light beam and part of the second light beam and reflecting the third light beam.

It should be noted that, in the first embodiment of the present invention, the fact that the coupling structure 31 is used for reflecting the first light beam and the second light beam means that the coupling structure 31 is capable of reflecting most of the first light beam and the second light beam, and is not completely reflected; the use of the coupling structure 31 for transmitting the third light beam means that the coupling structure 31 is capable of transmitting a substantial part of the third light beam instead of being completely transmitted.

As shown in fig. 6, in the first embodiment of the present invention, the coupling structure 31 is configured to transmit a portion of the third light beam in a first predetermined wavelength range and transmit a portion of the third light beam in a first polarization state in a second predetermined wavelength range, and the coupling structure 31 is configured to reflect the first light beam and the second light beam in the second polarization state in the second predetermined wavelength range, where a maximum value in the second predetermined wavelength range is smaller than or equal to a minimum value in the first predetermined wavelength range.

Through the above arrangement, under the condition of realizing reflection of the first light beam and the second light beam, the coupling structure 31 can transmit not only a part of the third light beam within the first preset wavelength range, but also a part of the third light beam within the second preset wavelength range in the first polarization state, so that the transmittance of the third light beam can be improved, and the utilization rate of the third light beam can be improved.

Specifically, in the first embodiment of the present invention, the coupling structure 31 includes an optical filter and a polarization splitting film on at least one side of the optical filter, wherein the optical filter can transmit the light beam in the wavelength range in fig. 5, and the polarization splitting film can be configured to enable the coupling structure 31 to transmit not only the light beam in the wavelength range in fig. 5 (about 550nm to 610nm, i.e. the first preset wavelength), but also the light beam in the total wavelength range in fig. 6 (about 520nm to 610nm, i.e. the sum of the first preset wavelength and the second preset wavelength). In this way, by providing the polarization splitting film, the transmission range of the coupling structure 31 can be increased in the case where the first light beam and the second light beam can be reflected.

Specifically, in the first embodiment of the present invention, taking the green led (laser diode) as the auxiliary light source, as shown in fig. 4, the spectrum of the green laser light is narrow, and the spectrum of the green led (laser diode) light is wide, the laser spectrum is included in the spectrum of the led (laser diode), and by setting the transmissive wavelength range to the filter of fig. 5, a part of the green led (laser diode) light beam (i.e., the third light beam) can pass through, and most of the first light beam and most of the second light beam are prevented from passing through (the wavelength ranges of the red, green and blue lasers are not in the wavelength ranges shown in fig. 5), so that a part of the third light beam is coupled with most of the first light beam and most of the second light beam reflected by the filter after being transmitted through the filter.

In the first embodiment of the present invention, the assistant light source assembly 21 is a non-laser light source, i.e. a broad spectrum light, such as: led (laser diode) or transmissive static fluorescent sheet.

Preferably, in the first embodiment of the present invention, the color of the third light beam is not limited, and is usually green or red.

Because the non-laser light source and the laser light source with the same color have a spectrum overlapping region or a spectrum interval is very close, if only the optical filter is adopted to couple the laser and the non-laser light, a part of non-laser light beams can not penetrate through the optical filter, therefore, the effect of the auxiliary light source is reduced, and therefore, in the first embodiment of the present invention, by disposing the polarization splitting film, in a wavelength range of about 520nm to 550nm (a second predetermined wavelength range) in fig. 6, the polarization splitting film is capable of reflecting a part of the first light beam and a part of the second light beam in the second polarization state and transmitting the third light beam in the first polarization state, in the wavelength range of about 550nm to 610nm (the first predetermined wavelength range), the polarization splitting film does not have the function of polarization splitting, that is, in this wavelength range, part of the third light beam is mainly transmitted by the optical filter, and most of the first light beam and most of the second light beam are reflected.

In the technical scheme, because the polarization states of the laser beam and the non-laser beam are not consistent, more third beams can pass through by arranging the polarization splitting film under the condition of increasing the wavelength range which can be penetrated by the optical filter, and the first beam and the second beam are prevented from passing through, namely, the penetration efficiency of the third beam can be improved under the condition of ensuring the reflection efficiency of the first beam and the second beam, so that the utilization rate of the auxiliary light source can be improved.

Specifically, fig. 6 is a graph of a polarization splitting coating, which is capable of passing a wavelength range larger than a pass range of a filter, and which is capable of restricting the passage of the first and second light beams in the second polarization state in a wavelength range increased relative to the filter, so that a part of the third light beam can be transmitted while reflecting the first and second light beams, thereby reducing the loss of the third light beam.

In a first embodiment of the present invention, the second polarization state is an S state, and the first polarization state is a P state.

As shown in fig. 1, in the first embodiment of the present invention, the light source device further includes one or more spaced second lens structures 20 located between the auxiliary light source assembly 21 and the coupling structure 31, and the second lens structures 20 are used for converging light.

In the above technical solution, the second lens structure 20 is arranged to converge the third light beam emitted by the auxiliary light source assembly 21 in a diffusion state, so as to shape the third light beam, and thus, the third light beam can be better coupled with the first light beam and the second light beam.

Preferably, as shown in fig. 1, in the first embodiment of the present invention, the number of the second lens structures 20 is two, one of the two second lens structures 20 is a spherical lens, and the other of the two second lens structures 20 is an aspheric lens.

Of course, in an embodiment not shown in the drawings, the two second lens structures 20 may be two spherical lenses or two aspherical lenses as long as they can perform a converging function.

Of course, in embodiments not shown in the drawings, the number of second lens structures 20 may also be three or four, etc.

Since the polarization direction of the red laser light is different from the polarization direction of the green laser light and the blue laser light, in order to better combine the red laser light, the blue laser light and the green laser light, as shown in fig. 1, in a first embodiment of the present invention, the light source device further includes a first phase retarder 11, the first phase retarder 11 is used for changing the polarization direction of the first color laser light beam and the second color laser light beam, and the first phase retarder 11 is located on the side of the first laser unit 51 and the second laser unit 52 facing the light combining mirror assembly 10.

Through the above arrangement, the first phase retarder 11 can change the polarization directions of the first color laser beam and the second color laser beam, and the polarization state of the third color laser beam is not changed, so that the polarization states of the first color laser beam, the second color laser beam and the third color laser beam are the same, and the uniformity of the light-emitting brightness of the first color laser beam, the second color laser beam and the third color laser beam can be improved, and the color uniformity of the mixed color light is further improved.

Preferably, in the first embodiment of the present invention, the first phase retarder 11 may be a half-wave plate or an optical rotation plate.

As shown in fig. 1, in the first embodiment of the present invention, the light source device further includes a second phase retarder 15, the second phase retarder 15 is used for changing the polarization direction of the two third color laser beams, and the second phase retarder 15 is located on a side of the third laser unit 53 facing the combiner assembly 10.

Through the above arrangement, the second phase retarder 15 can change the polarization direction of the third color laser beam, and the polarization states of the first color laser beam and the second color laser beam are not changed, so that the polarization states of the first color laser beam, the second color laser beam and the third color laser beam are the same, and the uniformity of the light-emitting brightness of the first color laser beam, the second color laser beam and the third color laser beam can be improved, and the color uniformity of the mixed color light is further improved.

Preferably, in the first embodiment of the present invention, the second phase retarder 15 may be a half-wave plate or an optical rotation plate.

In the first embodiment of the present invention, one of the first phase retarder 11 and the second phase retarder 15 may be provided, and the polarization states of the first color laser beam, the second color laser beam, and the third color laser beam may be the same.

As shown in fig. 1, an embodiment of the present invention provides a laser projection apparatus. The laser projection device includes the light source apparatus, the illumination assembly 60, and the imaging assembly 70 described above. The laser projection device has all the advantages of the light source device, and the description is omitted here.

As shown in fig. 1, in the first embodiment of the present invention, the illumination assembly 60 includes a reflective structure 42 and a third lens structure 43. Wherein, the reflecting structure 42 is located at one side of the light source device; the third lens structure 43 is located between the reflection structure 42 and the imaging component 70, and the light beam emitted from the light source device is reflected by the reflection structure 42 and transmitted by the third lens structure 43 to enter the imaging component 70.

With the above arrangement, the reflection structure 42 can change the optical path direction of the light beam emitted from the light source device, so that the imaging component 70 is disposed on one side of the main light source component 50, and thus, the length of the laser projection apparatus in the left-right direction of fig. 1 can be reduced, and the structure of the laser projection apparatus can be more compact; the third lens structure 43 can focus and shape the light beam reflected by the reflection structure 42, so that the light beam can be better incident on the imaging component 70.

Preferably, in the first embodiment of the present invention, the number of the third lens structures 43 may be one or more.

Preferably, in the first embodiment of the present invention, the illumination assembly 60 further includes a light valve 61 located between the imaging assembly 70 and the third lens structure 43, and the light beam transmitted through the third lens structure 43 enters the light valve 61 and is modulated by the light valve 61 and then enters the imaging assembly 70 for imaging, so that the third lens structure 43 can transfer the light spot onto the light valve 61.

Preferably, in the first embodiment of the present invention, the light valve 61 is one of an LCOS (liquid crystal on silicon) or LCD (liquid crystal display) or DMD chip.

As shown in fig. 1 and 7, in the first embodiment of the present invention, the light source device further includes a speckle dispersing component located on the light emitting side of the lens component 30 to homogenize and shape the light beam emitted from the light source device. The speckle reduction assembly includes a diffuser 36 rotatably disposed relative to the lens assembly 30, and the diffuser 36 is used for diffusing the light beam emitted from the lens assembly 30, so that the divergence angle of the light beam can be increased, and the speckle phenomenon can be improved.

Preferably, in the first embodiment of the present invention, the diffuser 36 is a diffuser wheel.

In particular, in one embodiment of the present invention, the illumination assembly 60 further includes a second light homogenizing structure located on a side of the diffuser facing away from the lens assembly 30, and the second light homogenizing structure homogenizes the light beam diffused by the diffuser 36, so that the uniformity of the picture can be improved.

Preferably, in the first embodiment of the present invention, the second light uniformizing structure is a light bar.

Of course, in alternative embodiments, the diffuser 36 may also be provided in the lighting assembly 60.

Preferably, in the first embodiment of the present invention, the illumination assembly 60 further includes a fourth lens structure 41 located between the light bar and the reflection structure 42, and the fourth lens structure 41 is used for converging and shaping the light beam emitted by the light source device.

Example two

As shown in fig. 2, the second embodiment of the present invention is different from the first embodiment in that the light source device is not provided with the assist light source assembly 21, the second lens structure 20 and the coupling structure 31, and is not provided with the first phase retarder 11 and the second phase retarder 15, but is provided with the light guiding assembly 35 and the shaping assembly 14. The light guide assembly 35 is located on a propagation path of the first light beam and the second light beam, and the first light beam and the second light beam are reflected by the light guide assembly 35 and then enter the lens assembly 30; the shaping component 14 is located between the light combining mirror component 10 and the light guiding component 35, and the shaping component 14 is used for eliminating polarization of the light beam and/or homogenizing the light beam.

With the above arrangement, the light guiding assembly 35 can reflect the first light beam and the second light beam to enable the first light beam and the second light beam to enter the lens assembly 30, and with the shaping assembly 14, the polarization of the first light beam and the second light beam can be eliminated, and the first light beam can be shaped or homogenized, which helps to improve the uniformity of the light emitting brightness of each color light, thereby improving the color uniformity of the mixed color light.

Of course, in an alternative implementation not shown in the figures, the light directing assembly 35 may also transmit the first and second light beams when they are parallel to the optical axis of the lens assembly 30.

Of course, in an alternative implementation not shown in the figures, the light directing assembly 35 may also be a reflector.

As shown in fig. 3a and 3b, in the second embodiment of the present invention, the light source device further includes a first light uniformizing structure 142 located at one side of the depolarization structure 141, the depolarization structure 141 is used for eliminating polarization of the light beam, the first light uniformizing structure 142 is used for homogenizing the light beam, and the depolarization structure 141 and the first light uniformizing structure 142 are separately disposed or integrally formed.

With the above arrangement, the first light uniformizing structure 142 can shape and homogenize the first light beam and the second light beam to achieve static diffusion, and the diffuser 36 disposed on the light emitting side of the lens assembly 30 can achieve dynamic diffusion, so that the purpose of dispersing speckles and homogenizing light spots can be achieved by combining the static diffusion and the dynamic diffusion, and thus, the uniformity of the picture can be achieved.

Preferably, in the second embodiment of the present invention, the first light uniformizing structure 142 is a diffusion sheet or the like.

Preferably, in the second embodiment of the present invention, the depolarization structure 141 is a depolarizer or a depolarizer.

Other structures of the light source device in the second embodiment of the present invention are the same as those in the first embodiment, and are not described herein again.

EXAMPLE III

As shown in fig. 7, a third embodiment of the present invention is different from the first embodiment in that the light source device of the third embodiment is not provided with the auxiliary light source assembly 21, the second lens structure 20 and the coupling structure 31, but is provided with two main light source assemblies 50 arranged perpendicular to each other and two light combining mirror assemblies 10 arranged corresponding to the two main light source assemblies 50 to combine two first light beams and two second light beams; the light source device further includes a third light combining lens 23, the third light combining lens 23 and the plurality of light combining lenses of one light combining lens 10 of the two light combining lens assemblies 10 are spaced and arranged in parallel along the first direction, the third light combining lens 23 is located on the optical axis of the other light combining lens assembly 10 of the two light combining lens assemblies 10, and the third light combining lens 23 is located on the optical axis of the lens assembly 30.

Through the arrangement, the first light beam synthesized by one of the two light combining mirror assemblies 10 and the second light beam synthesized by the other light combining mirror assembly 10 of the two light combining mirror assemblies 10 can be combined by the third light combining lens 23 and then coaxially emitted, the second light beam synthesized by one of the two light combining mirror assemblies 10 and the first light beam synthesized by the other light combining mirror assembly 10 of the two light combining mirror assemblies 10 are combined by the third light combining lens 23 and then coaxially emitted, so that the laser beams with three different colors can be synthesized into one beam and then emitted into the lens assembly 30, the coincidence degree of light spots is improved, the color uniformity of the light spots of the combined light is improved, and the display quality of a projection picture is improved.

Further, by providing two main light source assemblies 50 and coupling the light beams from the two main light source assemblies 50, the brightness of the light beam entering the lens assembly 30 can be improved and speckle can be reduced.

As shown in fig. 7, in the third embodiment of the present invention, the light source device includes two main light source assemblies 50 disposed perpendicular to each other and two light combining mirror assemblies 10 disposed corresponding to the two main light source assemblies 50 to combine two first light beams and two second light beams; the light source device further comprises a third light combining lens 23, the third light combining lens 23 is configured to transmit the first light beam and the second light beam combined by one of the two light combining lens assemblies 10, and the third light combining lens 23 is configured to reflect the first light beam and the second light beam combined by the other light combining lens assembly 10 of the two light combining lens assemblies 10.

With the above arrangement, the first light beam synthesized by one of the two light combining mirror assemblies 10 after being transmitted by the third light combining mirror sheet 23 and the second light beam synthesized by the other of the two light combining mirror assemblies 10 after being reflected by the third light combining mirror sheet 23 can be synthesized into the fourth light beam to be incident on the lens assembly 30; the second light beam synthesized by one of the two light combining mirror assemblies 10 after being transmitted by the third light combining mirror sheet 23 and the first light beam synthesized by the other one of the two light combining mirror assemblies 10 after being reflected by the third light combining mirror sheet 23 are synthesized into a fifth light beam to be injected into the lens assembly 30, so that the laser beams with three different colors can be synthesized into one beam to be injected into the lens assembly 30, the coincidence degree of light spots is improved, the color uniformity of the light combining light spots is improved, and the display quality of a projection picture is improved.

Preferably, in the third embodiment of the present invention, the light source device includes both the first phase retarder 11 and the second phase retarder 15, wherein the second phase retarder 15 is used for changing the polarization direction of the two third color laser beams of one of the two main light source assemblies 50, the first phase retarder 11 is used for changing the polarization direction of the first color laser beam and the second color laser beam of the other main light source assembly 50 of the two main light source assemblies 50, this makes the fourth light-combining lens 24 reflect the first and second light beams combined by one of the two light-combining lens assemblies 10, makes the third light-combining lens 23 transmit the first and second light beams combined by one of the two light-combining lens assemblies 10, and the third light-combining lens 23 transmits the first light beam and the second light beam combined by the other light-combining lens component 10 of the two light-combining lens components 10.

Preferably, in the third embodiment of the present invention, the third light combining lens 23 includes a light-transmitting plate and a polarization splitting film located on one side of the light-transmitting plate, so that the third light combining lens 23 has a polarization splitting function. This allows the third light combining lens 23 to reflect the first and second light beams combined by one of the two light combining lens assemblies 10 and transmit the first and second light beams combined by the other light combining lens assembly 10 of the two light combining lens assemblies 10.

Of course, in an alternative embodiment not shown in the drawings, the third light combining lens 23 may be a polarization beam splitter, as long as it can reflect the first light beam and the second light beam combined by one light combining lens component 10 of the two light combining lens components 10 and transmit the first light beam and the second light beam combined by the other light combining lens component 10 of the two light combining lens components 10.

In the third embodiment of the present invention, the vertical arrangement of the two main light source assemblies 50 means that the optical axes of the two main light source assemblies 50 are vertically arranged.

Other structures of the light source device in the third embodiment of the present invention are the same as those in the first embodiment, and are not described herein again.

Example four

As shown in fig. 8, the fourth embodiment of the present invention is different from the third embodiment in that the light source device includes two main light source assemblies 50 arranged in parallel with each other and two light combining mirror assemblies 10 arranged corresponding to the two main light source assemblies 50 to combine two first light beams and two second light beams; the light source device further includes a third light combining lens 23 and a fourth light combining lens 24 disposed at an interval with the third light combining lens 23 along the second direction, the third light combining lens 23 and the plurality of light combining lenses of one light combining lens assembly 10 of the two light combining lens assemblies 10 are disposed at an interval and in parallel along the first direction, the fourth light combining lens 24 and the plurality of light combining lenses of the other light combining lens assembly 10 of the two light combining lens assemblies 10 are disposed at an interval and in parallel along the first direction, the third light combining lens 23 and the fourth light combining lens 24 are both located on the optical axis of the lens assembly 30, the reflection normal of the third light combining lens 23 and the reflection normal of the fourth light combining lens 24 are disposed perpendicularly, wherein the second direction is disposed perpendicularly to the first direction.

Through the above arrangement, the first light beam synthesized by one of the two light combining mirror assemblies 10 sequentially passes through the fourth light combining mirror 24 for reflection, is transmitted by the third light combining mirror 23, and is coaxially incident into the lens assembly 30 with the second light beam synthesized by the other of the two light combining mirror assemblies 10 after being reflected by the third light combining mirror 23, and the second light beam synthesized by one of the two light combining mirror assemblies 10 sequentially passes through the fourth light combining mirror 24 for reflection, is transmitted by the third light combining mirror 23, and is coaxially incident into the lens assembly 30 with the first light beam synthesized by the other of the two light combining mirror assemblies 10 after being reflected by the third light combining mirror 23, so that the light beams emitted by the two main light source assemblies 50 arranged in parallel can be combined, thereby improving the coincidence degree of light spots and further improving the color uniformity of the light combining spots, so as to improve the display quality of the projection picture.

As shown in fig. 8, in the fourth embodiment of the present invention, the light source device includes two main light source assemblies 50 arranged in parallel with each other and two light combining mirror assemblies 10 arranged corresponding to the two main light source assemblies 50 to combine two first light beams and two second light beams; the light source device further includes a third light combining lens 23 and a fourth light combining lens 24 disposed at an interval with the third light combining lens 23 along the second direction, the first light beam and the second light beam combined by one light combining lens 10 of the two light combining lens assemblies 10 are reflected by the fourth light combining lens 24 and transmitted by the third light combining lens 23 in sequence, and then enter the lens assembly 30, and the first light beam and the second light beam combined by the other light combining lens 10 of the two light combining lens assemblies 10 are reflected by the third light combining lens 23 and then enter the lens assembly 30.

Through the arrangement, the first light beam synthesized by one of the two light combining mirror assemblies 10 and the second light beam synthesized by the other one of the two light combining mirror assemblies 10 can be synthesized into the fourth light beam, and the second light beam synthesized by one of the two light combining mirror assemblies 10 and the first light beam synthesized by the other one of the two light combining mirror assemblies 10 can be synthesized into the fifth light beam to be incident on the lens assembly 30, so that the overlapping degree of light spots is improved, the color uniformity of the light combining light spots is improved, and the display quality of a projection picture is improved.

Of course, in an alternative embodiment not shown in the drawings, the first light beam and the second light beam combined by one of the two light combining mirror assemblies 10 are reflected by the third light combining mirror 23, transmitted by the fourth light combining mirror 24 and then incident on the lens assembly 30, and the first light beam and the second light beam combined by the other of the two light combining mirror assemblies 10 are reflected by the fourth light combining mirror 24 and then incident on the lens assembly 30.

In the fourth embodiment of the present invention, the fourth light combining lens 24 is preferably a mirror, so that the first light beam and the second light beam combined by one light combining lens assembly 10 of the two light combining lens assemblies 10 can be reflected. Of course, in an alternative embodiment not shown in the drawings, the fourth light combining lens 24 may also be a polarization beam splitter, as long as the polarization beam splitter can reflect the first light beam and the second light beam combined by one light combining lens component 10 of the two light combining lens components 10.

It should be noted that, in the embodiment of the present invention, the second direction is arranged parallel to the optical axis direction of the lens assembly.

Other structures of the light source device in the fourth embodiment of the present invention are the same as those in the first embodiment, and are not described herein again.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: through setting up a plurality of lens that combine, and first colour laser beam and a third colour laser beam jet into the lens subassembly after merging into first light beam through a plurality of lens reflection of combining with the transmission, second colour laser beam and another third colour laser beam jet into the lens subassembly after merging into the second light beam through a plurality of lens reflection of combining with the transmission, can make the laser beam of two kinds of different colours synthetic one back like this, thereby the coincidence degree of facula has improved the improvement, and then the colour homogeneity of the light spot of having combined, with the display quality of projection picture that improves projection equipment.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. A light source device, comprising:

a primary light source assembly (50) for emitting a first color laser beam having a first wavelength, a second color laser beam having a second wavelength, and a third color laser beam having a third wavelength, the first, second, and third wavelengths being in different ranges;

a light combining mirror assembly (10) located at one side of the light outlet of the main light source assembly (50), wherein the light combining mirror assembly (10) comprises a plurality of light combining lenses;

a lens assembly (30) comprising one or more first lens structures (32) for converging light rays;

one of the third color laser beams reflected and transmitted by the light combining lens and the first color laser beam reflected by the light combining lens are combined into a first beam to be incident on the lens assembly (30), and the other of the third color laser beams reflected and transmitted by the light combining lens and the second color laser beam reflected by the light combining lens are combined into a second beam to be incident on the lens assembly (30); alternatively, the first and second electrodes may be,

and one of the third color laser beams reflected by the light combining lens and the first color laser beam reflected and transmitted by the light combining lens are combined into a first light beam to be emitted into the lens assembly (30), and the other of the third color laser beams reflected by the light combining lens and the second color laser beam reflected and transmitted by the light combining lens are combined into a second light beam to be emitted into the lens assembly (30).

2. The light source device according to claim 1, wherein the plurality of light combining lenses comprise a first light combining lens (13) and a second light combining lens (12) spaced along a first direction, the first light combining lens (13) is configured to reflect the first color laser beam and the second color laser beam and transmit the third color laser beam, and the second light combining lens (12) is configured to reflect the third color laser beam; alternatively, the first and second electrodes may be,

the first light combining lens (13) is used for reflecting the third color laser beam and transmitting the first color laser beam and the second color laser beam, and the second light combining lens (12) is used for reflecting the first color laser beam and the second color laser beam.

3. The light source device according to claim 1, wherein a spot area formed by the first color laser beam and the second color laser beam is smaller than or equal to a spot area formed by two third color laser beams; or the area of a light spot formed by the first color laser beam and the second color laser beam is larger than or equal to the area of a light spot formed by the two third color laser beams.

4. A light source arrangement according to claim 1, characterized in that the main light source assembly (50) comprises a first laser unit (51), a second laser unit (52) and at least two third laser units (53), wherein the first laser unit (51) is for the first color laser light beam, the second laser unit (52) is for the second color laser light beam and the third laser unit (53) is for emitting the third color laser light beam.

5. The light source device according to claim 4, wherein the distance between the first laser unit (51) and the second laser unit (52) is equal to the distance between the two third laser units (53), the plurality of light combining lenses comprises a first light combining lens (13) and a second light combining lens (12) which are arranged at an interval along a first direction, the first light combining lens (13) and the second light combining lens (12) are arranged in an inclined and parallel manner, the sum of the distance between the first light combining lens (13) and the second light combining lens (12) and the thickness of the first light combining lens (13) in the first direction is equal to the distance between the first laser unit (51) and a third laser unit (53) which is close to the second laser unit (52) of the two third laser units (53), and/or the distance between the first light combining lens (13) and the second light combining lens (12) and the first light combining lens (13) The sum of the thicknesses in the first direction is equal to the distance between a third laser unit (53) of the two third laser units (53) that is distant from the second laser unit (52) and the second laser unit (52).

6. The light source device according to any one of claims 1 to 5, further comprising:

the auxiliary light source assembly (21) comprises a light source for emitting a third light beam, the third light beam is a wide-spectrum light, and the first color laser light beam, the second color laser light beam and the third color laser light beam are narrow-spectrum light;

a coupling structure (31) located in an optical path propagation path of the third light beam, and the coupling structure (31) is located in an optical path propagation path of the first and second light beams, the coupling structure (31) being configured to reflect the first and second light beams and to transmit the third light beam; alternatively, the coupling structure (31) is for transmitting the first and second light beams and reflecting the third light beam.

7. The light source device according to claim 6, wherein when the coupling structure (31) is configured to reflect the first and second light beams and transmit the third light beam, the coupling structure (31) is configured to transmit a portion of the third light beam within a first predetermined wavelength range and transmit a portion of the third light beam in a first polarization state within a second predetermined wavelength range, and the coupling structure (31) is configured to reflect the first and second light beams in a second polarization state within the second predetermined wavelength range, wherein a maximum value in the second predetermined wavelength range is smaller than or equal to a minimum value in the first predetermined wavelength range.

8. A light source device according to claim 6, characterized in that it further comprises one or more spaced apart second lens structures (20) between said auxiliary light source assembly (21) and said coupling structure (31), said second lens structures (20) being adapted to converge light rays.

9. The light source device according to any one of claims 1 to 5, further comprising:

a light guide assembly (35) located on a propagation path of the first light beam and the second light beam, the first light beam and the second light beam being reflected or transmitted by the light guide assembly (35) and then entering the lens assembly (30);

a shaping component (14) located between the light combining component (10) and the light directing component (35), the shaping component (14) for eliminating polarization of the light beam and/or homogenizing the light beam;

a speckle dissipating assembly comprising a diffuser (36) rotatably arranged relative to the lens assembly (30), the diffuser (36) being adapted to diffuse a light beam emitted from the lens assembly (30).

10. The light source device according to claim 9, wherein the shaping assembly comprises a depolarizing structure (141) and a first light unifying structure (142) located at one side of the depolarizing structure (141), the depolarizing structure (141) is configured to depolarize the light beam, the first light unifying structure (142) is configured to homogenize the light beam, and the depolarizing structure (141) and the first light unifying structure (142) are separately disposed or integrally formed; alternatively, the light directing component (35) is a reflector.

11. The light source device according to any one of claims 1 to 5, characterized in that it comprises two of said main light source assemblies (50) arranged perpendicularly to each other and two of said light-combining mirror assemblies (10) arranged in correspondence of the two main light source assemblies (50) to combine the two first light beams and the two second light beams;

the light source device further comprises a third light combining lens (23), the third light combining lens (23) and a plurality of light combining lenses of one light combining lens assembly (10) of the two light combining lens assemblies (10) are arranged in parallel and spaced along a first direction, the third light combining lens (23) is positioned on the optical axis of the other light combining lens assembly (10) of the two light combining lens assemblies (10), and the third light combining lens (23) is positioned on the optical axis of the lens assembly (30); alternatively, the first and second electrodes may be,

the light source device comprises two main light source components (50) which are arranged vertically and two light combining mirror components (10) which are arranged corresponding to the two main light source components (50) so as to synthesize two first light beams and two second light beams;

the light source device further comprises a third light combining lens (23), the third light combining lens (23) is used for transmitting the first light beam and the second light beam which are combined by one (10) of the two light combining lens components (10), and the third light combining lens (23) is used for reflecting the first light beam and the second light beam which are combined by the other (10) of the two light combining lens components (10).

12. The light source device according to any one of claims 1 to 5, characterized in that it comprises two of said main light source assemblies (50) arranged parallel to each other and two of said light-combining mirror assemblies (10) arranged in correspondence of the two main light source assemblies (50) to combine the two first light beams and the two second light beams;

the light source device also comprises a third light combining lens (23) and a fourth light combining lens (24) which is arranged along the second direction at intervals with the third light combining lens (23), the third light combination lens (23) and a plurality of light combination lenses of one light combination lens component (10) in the two light combination lens components (10) are arranged in parallel at intervals along the first direction, the fourth light combining lens (24) and a plurality of light combining lenses of the other light combining lens component (10) in the two light combining lens components (10) are arranged in parallel at intervals along the first direction, the third light combining lens (23) and the fourth light combining lens (24) are both positioned on the optical axis of the lens component (30), the reflection normal of the third light combining lens (23) and the reflection normal of the fourth light combining lens (24) are arranged vertically, wherein the second direction is arranged vertically to the first direction; alternatively, the first and second electrodes may be,

the light source device comprises two main light source components (50) arranged in parallel and two light combining mirror components (10) arranged corresponding to the two main light source components (50) so as to synthesize two first light beams and two second light beams;

the light source device further comprises a third light combining lens (23) and a fourth light combining lens (24) arranged at intervals along a second direction with the third light combining lens (23), a first light beam and a second light beam synthesized by one light combining lens component (10) in the two light combining lens components (10) are reflected by the fourth light combining lens (24) in sequence, the third light combining lens (23) is transmitted and then enters the lens component (30), and a first light beam and a second light beam synthesized by the other light combining lens component (10) in the two light combining lens components (10) are reflected by the third light combining lens (23) and then enter the lens component (30); alternatively, the first and second electrodes may be,

the first light beam and the second light beam which are combined by one light combining mirror assembly (10) in the two light combining mirror assemblies (10) are reflected by the third light combining mirror (23) and transmitted by the fourth light combining mirror (24) in sequence and then enter the lens assembly (30), and the first light beam and the second light beam which are combined by the other light combining mirror assembly (10) in the two light combining mirror assemblies (10) are reflected by the fourth light combining mirror (24) and then enter the lens assembly (30).

13. The light source device according to claim 4 or 5, further comprising a first phase retarder (11), wherein the first phase retarder (11) is used for changing the polarization direction of the first color laser beam and the second color laser beam, and the first phase retarder (11) is located at the side of the first laser unit (51) and the second laser unit (52) facing the light combining mirror assembly (10); alternatively, the first and second electrodes may be,

the light source device further comprises a second phase retarder (15), the second phase retarder (15) is used for changing the polarization directions of the two third color laser beams, and the second phase retarder (15) is located on the side, facing the light combination mirror assembly (10), of the third laser unit (53).

14. A laser projection apparatus comprising the light source device according to any one of claims 1 to 13.

Images