CN115933298A

CN115933298A - Light source assembly and projection equipment

Info

Publication number: CN115933298A
Application number: CN202211600385.6A
Authority: CN
Inventors: 李巍; 顾晓强; 田有良
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2023-04-07
Also published as: CN113900336B; CN113900336A; WO2021259274A1

Abstract

The application discloses light source subassembly and laser projection equipment. The light source assembly includes: the light-emitting component emits a first laser beam and a second laser beam; the light combining lens is arranged obliquely to the wheel surface of the fluorescent wheel and comprises a plurality of reflecting areas and a plurality of transmitting areas which are alternately arranged; the first laser beam and the second laser beam penetrate through the incident fluorescence wheel from the plurality of transmission areas; the first laser beam and the second laser beam do not pass through the optical axis of the first collimating lens group and are not symmetrical about the optical axis; the first fluorescence and the second fluorescence generated by the excited fluorescence area are reflected by the fluorescence wheel and enter the light combining lens; the reflecting area reflects the first laser beam and the second laser beam to the light combining lens; the light combining lens reflects the laser beam and the fluorescent beam to the light outlet of the light source component in a time-sharing manner, so that the combined light output of the laser and the fluorescent light is realized. The light source component in the technical scheme can simultaneously realize the output of higher luminous power by a more compact optical framework.

Description

Light source assembly and projection equipment

The invention is based on the Chinese invention application 202010576383.2 (application date: 2020-06-22), the invention name: divisional applications of light source assemblies and projection apparatuses.

Technical Field

The present application relates to the field of optoelectronic technologies, and in particular, to a light source module and a projection apparatus.

Background

Laser excited fluorescent materials emit fluorescent light as a projection light source, and are increasingly commonly applied to laser projection equipment. Although the power of laser can be promoted, the fluorescence conversion efficiency can not be in a linear proportional relation with the power of exciting light, if the high energy density is too high, quenching can be caused, the fluorescence conversion efficiency is rapidly reduced, a fluorescence wheel can be punctured, and the problem of heat dissipation of the fluorescence wheel is caused by the high exciting power.

If a fluorescent wheel with a diameter of 92mm, for example, is used, the fluorescent wheel can bear the irradiation of a high-power excitation light source, even can receive double-sided irradiation excitation, the luminous power of fluorescence conversion is higher, and the heat dissipation is improved, but the fluorescent wheel cannot be adopted when a miniaturized light source framework is pursued due to the larger size.

In addition, many optical lenses are also included in the laser projection light source, such as a lens, and the optical performance of the optical lens is related to the material and the effective transmission area of the lens. In the product design, if a low-cost scheme is pursued, the material of the optical lens is selected to be plastic instead of glass, and if the optical lens receives irradiation of a high-energy-density light beam for a long time, the temperature resistance and the stability of the optical lens are relatively poor.

With the popularization and application of laser projection equipment, the requirement for equipment miniaturization is met, so that multiple aspects such as size, cost and optical efficiency need to be considered while basic illumination light beams are realized during light source product design.

The light source needs to emit at least red, green and blue lights in a time sequence, which requires that the light source assembly at least further includes an excitation light source, usually a blue laser light source, when the light source assembly adopts an excitation scheme of the fluorescent wheel, and the fluorescent wheel is provided with fluorescent materials capable of emitting at least two colors. When the fluorescent wheel comprises a transmission area allowing the laser excitation light source to penetrate through, if the fluorescent wheel is a transmission type fluorescent wheel, the fluorescence generated by excitation is allowed to penetrate through the fluorescent wheel body, part of the excitation light source and the fluorescence generated by excitation can be emitted from the back surface of the fluorescent wheel, so that the light source is configured as illustrated in fig. 1-1, and the light source assembly comprises: an excitation light source 001a emitting a laser beam, which is incident to the collimating lens group 003a on the front surface of the transmissive fluorescent wheel 002a through a beam shaping unit (not shown), and along with the rotation of the wheel body, when the collimating lens group 003a guides the excitation beam to the fluorescent region of the transmissive fluorescent wheel 002a, the fluorescence conversion material in the fluorescent region is excited to emit light, and the excited fluorescence is transmitted through the fluorescent wheel body, emitted from the back surface of the transmissive fluorescent wheel 002a, transmitted through the collimating lens group 004a, converged and then enters the light collecting unit 005a; when the collimator group 003a guides the excitation light beam to the transmission region of the transmissive luminescent wheel 002a, the excitation light beam passes through the region, exits from the back surface of the transmissive luminescent wheel 002a, and similarly passes through the collimator group 004a and enters the light collecting element 005a. In the optical path architecture shown in fig. 1-1, the optical path transmission travels substantially along one direction, but this requires a substantially linear arrangement of multiple optical components in the optical path, resulting in a long length in one direction or dimension.

And, as another commonly used technique in the related art, if the fluorescent wheel is a reflective fluorescent wheel, the fluorescent light generated by excitation is reflected by the fluorescent wheel body and emitted along a direction opposite to the incident direction of the excitation light, and after part of the excitation light is transmitted from the transmission region of the fluorescent wheel, the excitation light is returned to the front of the fluorescent wheel from the back of the fluorescent wheel by means of the relay loop system, so as to be able to join with the fluorescent light reflected by the fluorescent wheel again, so as to implement light combination, then at least a plurality of reflectors are disposed around the fluorescent wheel in the light path architecture, as shown in fig. 1-2, the light source assembly includes: laser light source 001b, dichroic mirror 006, collimating lens group 003b, fluorescent wheel 002b, relay circuit system, collimating lens group 004b and light collecting component 005b. Wherein the relay loop system includes: a first mirror 007, a first lens 008, a second mirror 009, a second lens 010, a third mirror 011, and a third lens 012.

The excitation light source 001b may emit blue laser light, and the dichroic mirror 006 may transmit blue light. The blue laser light emitted from the excitation light source 001b can be emitted to the fluorescent wheel 002b through the dichroic mirror 006 and the collimator lens group 003 b. The fluorescent wheel 002b includes a fluorescent region having a fluorescent material that can emit fluorescent light (such as red fluorescent light and green fluorescent light) under irradiation of blue laser light, and a transmissive region (not shown in the figure). The fluorescent wheel 002b may be rotated while blue laser light is emitted to different areas of the fluorescent wheel 002b. When the blue laser light is emitted to the transmission region of the fluorescent wheel 004, the blue laser light may pass through the transmission region and the collimating lens group 004b to be emitted to the first reflection mirror 007, and then reflected by the first reflection mirror 007 to be emitted to the second reflection mirror 009 through the first lens 008. The blue laser light may then be reflected by the second mirror 009 to transmit through the second collimating lens 010 toward the third reflecting lens 011, and reflected by the third reflecting lens 011 to transmit through the third lens 012 and reach the dichroic mirror 006, to transmit through the dichroic mirror 006 toward the light collecting part 005b. As the fluorescent wheel 004 rotates, when the blue laser light emitted from the laser 001 is emitted to the fluorescent area of the fluorescent wheel 004, the blue laser light can excite the fluorescent material of the fluorescent area to generate fluorescent light, and the fluorescent light is reflected by the fluorescent wheel to be emitted to the dichroic mirror 006. The dichroic mirror 006 may reflect red and green light, so the fluorescent light may be reflected again on the dichroic mirror 006 to be directed to the light collecting part 005b. As can be seen from the above schematic drawings, due to the arrangement of at least the blue light relay circuit, not only the number of lenses in the optical system is large, but also a certain space is required to be occupied, which results in a large volume of the light source module in the related art.

And, there is also a related art in which the fluorescent wheel is not provided with a transmission region for the excitation light, but is additionally provided with a supplementary light source for supplementing the generation of the primary color light other than the color output from the fluorescent wheel, but this undoubtedly results in an increase in optical components and also in an increase in volume of the optical path.

Disclosure of Invention

The application provides a light source component and a projection device, which have compact optical structure and can output high luminous power efficiently and continuously. The adopted technical scheme is as follows:

in one aspect, there is provided a light source assembly comprising:

the light-emitting component is used for emitting a first laser beam and a second laser beam;

the fluorescent wheel is provided with a fluorescent area and a reflecting area;

the first collimating lens group is arranged in the light path of the first laser beam and the second laser beam incident to the fluorescent wheel;

the first laser beam and the second laser beam are respectively incident to different positions of the mirror surface of the first collimating lens group, and are converged by the first collimating lens group and then incident to the fluorescent wheel,

the fluorescent area can be excited to respectively generate first fluorescent light and second fluorescent light corresponding to the first laser beam and the second laser beam when receiving the irradiation of the first laser beam and the second laser beam, and the first fluorescent light and the second fluorescent light can be reflected by the fluorescent wheel and respectively enter the first reflecting part and the second reflecting part after being transmitted through the first collimating mirror group;

the first reflection part and the second reflection part are both arranged obliquely to the wheel surface of the fluorescent wheel, and are not overlapped with each other and have intervals;

when the reflection region of the fluorescence wheel receives the irradiation of the first laser beam and the second laser beam, the first laser beam and the second laser beam can be reflected by the reflection region of the fluorescence wheel, and are incident to the first reflection part and the second reflection part after being transmitted through the first collimating mirror group again.

The beneficial effect that technical scheme that this application provided brought includes at least:

in the light source subassembly that this application provided, the fluorescence wheel includes fluorescence district and reflecting area, and the first laser and the second that light emitting component sent restraint laser as the exciting light to the different positions of the first collimating mirror group mirror surface of directive, arouse that the fluorescence wheel produces different first fluorescence and second fluorescence.

First, a first laser beam and a second laser beam are emitted as excitation light, and are incident into a first collimating lens group from different positions, so that the directions of the first laser beam and the second laser beam incident into the surface of the fluorescence wheel are different.

Since the laser beam is a high-energy beam, if it is desired to increase the luminous power of the fluorescence by increasing the energy density of the single laser beam, not only unreliability and higher heat-resistant requirements are brought to the optical lens in the optical path, which leads to an increase in the cost of the optical path architecture, but also the problem of heat dissipation of the fluorescence wheel due to the irradiation of the high-energy-density beam may be caused, which reduces the fluorescence conversion efficiency.

In this application technical scheme, set up laser excitation light beam into two bundles, to setting up the lens in the excitation light path, two bundles of different light shines to the different positions of lens, can alleviate the lens part and receive the ageing or the performance degradation problem that high energy beam shines and bring for a long time.

Secondly, through shining two bundles of laser to collimating lens group's different positions, and then the direction of inciting into fluorescence wheel is also different, and when converging in the reflection zone of fluorescence wheel, two bundles of laser beam are gone on the outgoing according to the law of reflection behind seeing through collimating lens group again after being reflected to two bundles of laser beam incide different reflection parts, and are reflected by different reflection parts.

And, in a similar way, irradiating the two laser beams to different positions of the collimating lens group, and further irradiating the two laser beams to different directions of the fluorescent wheel. The reflecting component can reflect the two laser beams and the fluorescent beam in the same direction in a time-sharing manner so as to complete light combination.

Therefore, along with the rotation time sequence of the fluorescent wheel, the light source component can output the laser beam and the fluorescent beam in time sequence.

And, in this application technical scheme, the last laser reflection district that is provided with of fluorescence wheel, set up laser transmission district and then need set up relay loop system and compare with the correlation technique, the light source subassembly optical component in this application scheme is few, and the light path framework is compact, can also compromise the miniaturization of light source subassembly when realizing higher luminous power.

In another aspect, a projection apparatus is provided, the projection apparatus comprising: the light source assembly, the optical machine and the lens in the technical scheme are adopted;

the light source assembly is used for emitting illuminating light beams to the light machine, the light machine is used for modulating the illuminating light beams emitted by the light source assembly and projecting the illuminating light beams to the lens, and the lens is used for projecting and imaging the light beams modulated by the light machine.

The laser projection equipment using the light source component is relatively beneficial to realizing the miniaturization of the optical engine structure of the laser projection equipment through the miniaturization of the light source component, and can also bring convenience for other structures in the equipment, such as heat dissipation or circuit board arrangement.

Drawings

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

Fig. 1-1 is a schematic view of an optical path of a light source provided in the related art;

fig. 1-2 are schematic diagrams of optical paths of another light source provided in the related art;

fig. 2-1 is a schematic optical path diagram of a light source module provided in the embodiments of the present application;

2-2 are schematic diagrams of another optical path of a light source module provided by embodiments of the present application;

FIG. 3 is a schematic wheel surface view of a fluorescent wheel provided in embodiments of the present application;

FIG. 4-1 is a schematic view of the optical path of another light source module provided by the embodiments of the present application;

fig. 4-2 is a schematic optical path diagram of another light source module provided in the embodiments of the present application;

4-3 are schematic diagrams of light paths of still another light source module provided by the embodiments of the present application;

FIG. 5-1 is a schematic optical path diagram of another light source module provided in the embodiments of the present application;

5-2 are schematic diagrams of light paths of still another light source module provided by the embodiments of the present application;

fig. 6 is a schematic plan view of a light combining lens provided in an embodiment of the present application;

FIG. 7 is a schematic optical path diagram of a light emitting assembly provided in an embodiment of the present application;

FIG. 8 is a schematic optical path diagram of a projection apparatus provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

The light source assembly that this application technical scheme related to is applied to among the laser projection equipment. In an example of the present application, a laser projection apparatus may include: the light source assembly is used as a light emitting source, the light machine is located on the light emitting side of the light source assembly, and the lens is located on the light emitting side of the light machine. The light source assembly is used for providing illuminating light beams, can provide three primary colors of light in a time sequence (other colored lights can be added on the basis of the three primary colors of light), mixes light to form white light, and can also output the three primary colors of light simultaneously to continuously emit the white light.

The optical machine comprises a core light modulation component which is used for modulating the illumination light beams emitted by the light source component according to the image display signals to form light beams with image information and converging the light beams to the lens, and the lens is used for projecting and imaging the light beams modulated by the optical machine. The light source assembly comprises a laser capable of emitting laser with at least one color, such as blue laser. The light modulation component in the light machine can be a DMD digital micro-mirror array or an LCD liquid crystal light valve. The lens can be a long-focus lens or a short-focus lens.

In the present application example, the following example is described by taking an example in which the light source module outputs primary light in a time-sequential manner.

And, in this application example, the laser projection apparatus may be based on a DLP projection architecture, in which the light modulation component is a DMD chip, and the lens may be an ultra-short-focus lens, so that the laser projection apparatus in this example may be an ultra-short-focus laser projection apparatus, and projection of a large-size picture may be achieved with a small projection ratio.

In particular, various embodiments of the light source assembly will be described first.

Fig. 2-1 and fig. 2-2 respectively show the optical path transmission diagrams of different moments of a light source assembly.

Fig. 2-1 is a schematic view illustrating a fluorescence excitation light path of a light source module according to an embodiment of the present disclosure. As shown, the light source assembly 10 may include:

a light emitting component 101 for emitting a first laser beam S1 and a second laser beam S2;

a fluorescent wheel 103 provided with a fluorescent region and a reflective region (the fluorescent region and the reflective region are not shown in the drawings and are shown in other drawings), and the fluorescent wheel 103 is not provided with a light-transmitting region;

the first collimating lens group 105 is located on the front side of the fluorescent wheel 103, is disposed in the light path where the first laser beam S1 and the second laser beam S2 enter the fluorescent wheel 103, and is configured to converge the excitation light beam to form a smaller excitation light spot.

The first laser beam S1 and the second laser beam S2 are respectively incident to different positions of the mirror surface of the first collimating lens group 105, and are both incident to the fluorescent wheel 103 after being converged by the first collimating lens group 105.

As the fluorescent wheel 103 rotates, the fluorescent areas and the reflective areas are alternately illuminated by the laser beam.

When the fluorescent area receives the irradiation of the first laser beam S1 and the second laser beam S2, in this example, the first laser beam S1 and the second laser beam S2 are emitted from the light emitting assembly at the same time, and can also be regarded as being used for exciting the fluorescent area at the same time.

Corresponding to the first laser beam S1 and the second laser beam S2, the fluorescence area can be excited to generate a first fluorescence E1 and a second fluorescence E2, and the first fluorescence E1 and the second fluorescence E2 can be reflected by the fluorescence wheel 103 and respectively enter the first reflection part 1022a and the second reflection part 1022b after being transmitted through the first collimating mirror group 105.

In a specific implementation, the first reflection portion 1022a and the second reflection portion 1022b are disposed along the same inclination angle and parallel to each other, and the first reflection portion 1022a and the second reflection portion 1022b are not overlapped and have a gap therebetween. The gap is used for allowing the laser excitation light to pass through, and neither of the first reflection portion 1022a and the second reflection portion 1022b is located in the optical paths of the first laser beam S1 and the second laser beam S2, and does not block the two laser excitation lights.

Since the first fluorescence E1 and the second fluorescence E2 can be regarded as being excited at the same time and reflected by the fluorescence wheel 103, and collimated by the first collimating lens group 105, the first fluorescence E1 and the second fluorescence E2 are incident on the reflecting surfaces of the first reflecting portion 1022a and the second reflecting portion 1022b, respectively, at the same time and reflected by the two reflecting members, and in this example, both reflected toward the light outlet of the light source module.

Referring to fig. 3, a schematic diagram of a fluorescent wheel tread is shown. As shown, the fluorescent wheel 103 includes a fluorescent region 1031 and a reflective region 1032, wherein the fluorescent region 1031 and the reflective region 1032 enclose to form a closed loop shape, such as a ring shape; the fluorescent region 1031 and the reflective region 1032 may also be both fan-shaped, so as to form a disk shape by enclosing. In this example, the fluorescent wheel does not include a light-transmissive region.

At least a green phosphor material, which may be a phosphor, may be disposed in the phosphor zone of the phosphor wheel 103. At least one of a red fluorescent material and a yellow fluorescent material may be disposed in the fluorescent region. The fluorescent material of each color can emit fluorescent light of a corresponding color under excitation of laser light. In one embodiment, the fluorescence that is excited may also be a laser. In this way, the fluorescent area of the fluorescent wheel 103 can emit green fluorescent light, red fluorescent light or yellow fluorescent light under the action of the light emitted by the light emitting component.

For example, the fluorescent region in the fluorescent wheel 103 in the embodiment of the present application may include at least one sub-fluorescent region, and each sub-fluorescent region may include a fluorescent material of one color. When the fluorescent region includes a plurality of sub-fluorescent regions, the plurality of sub-fluorescent regions and the reflective region may be arranged circumferentially. As shown in fig. 3, the fluorescence zone 1031 may include two sub-fluorescence zones G1 and G2. The fluorescent wheel 103 can rotate in the w direction or the direction opposite to the w direction about the rotation axis Z. The two sub-fluorescent regions may include a green fluorescent material and a red fluorescent material, respectively, or the two sub-fluorescent regions may include a green fluorescent material and a yellow fluorescent material, respectively, or the two sub-fluorescent regions may include a green fluorescent material and an orange fluorescent material, respectively.

It should be noted that the area ratio of each fluorescent region and reflective region in fig. 3 is merely an example. In one embodiment, the areas of the sub-phosphor regions and the reflective regions in the phosphor wheel may be different, and the areas of the sub-phosphor regions and the reflective regions of the phosphor wheel may be designed according to the color of the light emitted therefrom. The laser emitted to the reflecting area of the fluorescent wheel is assumed to be blue laser; the sub-fluorescent region G1 comprises a red fluorescent material and can emit red light under the excitation of blue laser; the sub fluorescent region G2 includes a green fluorescent material capable of emitting green light under excitation of blue laser light. The projection device needs to project white light, and then the light of various colors, which needs to be converged by the converging lens, can be mixed to obtain the white light. Illustratively, white light can be obtained by mixing blue light, red light and green light in a ratio of 1. In the embodiment of the application, the rotating speed of the fluorescent wheel can be kept unchanged, the areas of the sub fluorescent regions and the reflecting regions of the fluorescent wheel are equal, the ratio of blue light, red light and green light emitted by the fluorescent wheel is 1. As another example, if white light can be obtained after mixing blue light, red light, and green light in a ratio of 1. In one embodiment, the number of the sub-fluorescence regions can also be four, five or other numbers; the colors of the fluorescent light emitted from the respective sub fluorescent regions may all be different, or there may be at least two sub fluorescent regions emitting fluorescent light of the same color, and the at least two sub fluorescent regions may not be adjacent.

Referring to fig. 2-1, a schematic optical path diagram of fluorescence excitation is shown, it should be noted that, as the fluorescence wheel rotates, different fluorescent materials may sequentially and repeatedly generate fluorescence according to the rotation timing sequence by using the same optical path diagram as that in fig. 2-1, and the fluorescence of different colors may also be reflected, collimated, and finally reflected by the first and

second reflection portions

1022a and 1022b with reference to the path diagram in fig. 2-1. The excitation process of other fluorescence will not be described herein, and reference can be made to the foregoing description.

And, in the embodiments of the present application, the preparation of the fluorescence wheel can be achieved in various ways.

In an alternative, the fluorescent wheel 103 may have a reflective substrate, and the reflective region of the fluorescent wheel 103 may be a part of the reflective substrate, for example, the fluorescent wheel has a metal substrate, such as an aluminum substrate, and the surface of the aluminum substrate facing the light incidence has a mirror surface. The fluorescent region of the fluorescent wheel 103 may be located on a reflective substrate, the surface of which is a light-reflective surface. For example, the fluorescent material may be applied at a fixed location on the reflective substrate to form a fluorescent region of the fluorescent wheel, and the region of the reflective substrate that is not coated with the fluorescent material forms a reflective region of the fluorescent wheel. In one embodiment, the reflective substrate may be circular or ring-shaped, or may be other shapes such as rectangular or hexagonal, etc. When the reflecting substrate is in other shapes, the fluorescent region and the reflecting region can be surrounded into a ring shape by designing the coating region of the fluorescent material.

In another alternative, the substrate of the fluorescent wheel may not be a reflective substrate, e.g., the substrate is a ceramic substrate on which a reflective film layer may be disposed, e.g., the reflective region of the fluorescent wheel includes a reflective coating. For example, a fluorescent material and a reflective coating may be applied to a ring structure having a poor light reflection effect to obtain a fluorescent wheel. Wherein the areas coated with the fluorescent material form the fluorescent regions of the fluorescent wheel and the areas coated with the reflective coating form the reflective regions of the fluorescent wheel.

The schematic path of the laser beam in the light source module is described below in connection with fig. 2-2. As shown in fig. 2-2, the first laser beam S1 and the second laser beam S2 are both emitted from the light emitting assembly 101, and the first laser beam S1 and the second laser beam S2 are two separate non-overlapping beams, and in a specific implementation, the first laser beam S1 and the second laser beam S2 have a space therebetween, so as to allow the first laser beam S1 and the second laser beam S2 to be incident on different positions of the optical lens in the optical path.

The first laser beam S1 and the second laser beam S2 emitted by the light emitting assembly 101 may be two independent beams, or the first laser beam S1 and the second laser beam S2 may also be two beams of a single beam, which is not limited in the embodiment of the present application. In a specific implementation, the light emitting assembly 101 may emit not only two light beams, but also three light beams, four light beams, or even more, and the number of the light beams emitted by the light emitting assembly is not limited in the embodiment of the present application. In this application, the first beam of laser and the second beam of laser may be two arbitrary beams of light among a plurality of beams of light emitted by the light-emitting assembly, and for the case where the light-emitting assembly emits other beams of light, reference may be made to the description of the first beam of laser and the second beam of laser, which is not described in detail in this application.

As shown in fig. 2-2, the first laser beam S1 and the second laser beam S2 are incident on different positions of the mirror surface of the first collimating lens group 105 on the front surface of the fluorescent wheel 103. The first collimating lens group 105 converges both beams to the front of the fluorescent wheel 103 to form a smaller excitation spot.

When the reflection region of the fluorescence wheel 103 receives the irradiation of the first laser beam S1 and the second laser beam S2, the first laser beam S1 and the second laser beam S2 may be reflected by the reflection region of the fluorescence wheel 103, and enter the first reflection part 1022a and the second reflection part 1022b after being transmitted through the first collimator group 105 again.

In one embodiment, the connecting line between the position of the mirror surface of the first collimating lens group 105 on which the first laser beam S1 and the second laser beam S1 are incident and the converging position on the fluorescence wheel is different from the angle formed by the optical axis h of the first collimating lens group 105.

And the first laser beam S1 and the second laser beam S2 do not pass through the optical axis of the first collimating lens group 105, and the two laser beams are also not symmetrical with respect to the optical axis h of the first collimating lens group 105.

For example, a connecting line between a position irradiated by a first beam of laser in the first collimating lens group and a convergence position of the first beam of laser on the fluorescent wheel is a first connecting line, and an included angle between the first connecting line and an optical axis of the first collimating lens group is a first included angle; a connecting line between the position irradiated by the second laser beam in the first collimating lens group and the convergence position of the second laser beam on the fluorescent wheel is a second connecting line, and the included angle between the second connecting line and the optical axis of the second lens group is a second included angle; the first included angle is different from the second included angle. For example, referring to fig. 2-2, a first included angle formed by the first laser beam S1 and the optical axis h of the first collimating lens group 102 is an angle α, and a second included angle formed by the second laser beam S2 and the optical axis h of the first collimating lens group 102 is an angle β, where α > β. It should be noted that, when the included angle formed by the two laser beams is different, the two laser beams may be located on both sides of the optical axis h, or may be located on one side of the optical axis h. In this example, the example is given by distributing two laser beams on both sides of the optical axis h.

Like this, first bundle of laser and second bundle of laser can incide to the mirror surface of first collimating lens group with different incident angles, for example, the convex surface of the first piece of lens of first collimating lens group, but according to reflection principle, the respective reflection light path of first bundle of laser and second bundle of laser will not overlap to first bundle of laser and second bundle of laser that is reflected by the fluorescent wheel reflection area can incide first reflection part 1022a and second reflection part 1022b respectively along different reflection light paths, and is reflected by above-mentioned two reflection part, for example the light outlet direction outgoing of orientation light source subassembly.

The first lens of the first collimating lens group is a lens which receives laser incidence in the first collimating lens group.

And, in order to realize the excitation light path shown in fig. 2-1 and 2-2, one of the first laser beam and the second laser beam may be transmitted through the space between the first reflecting portion and the second reflecting portion, and the other may be transmitted through the side of the first reflecting portion or the second reflecting portion away from the space, for example, the side may be considered as being transmitted through the outside of one of the two reflecting portions. Thus, the first reflection part and the second reflection part do not block the laser excitation light beam by providing a space.

And, on the basis of the above embodiments, fig. 4-1 shows a schematic light path diagram of another light source module provided in the present application. As shown in fig. 4-1, the light source assembly 10 may further include: the second lens group 106 is located between the light emitting element 101 and the first and

second reflection parts

1022a and 1022b, and is used for reducing the light spots of the first and second laser beams emitted from the light emitting element. The second lens group 106 can make the emitted laser beam thinner than the incident laser beam, so as to pass through the lens in the rear optical path.

In one embodiment, the second lens group 106 can be a telescopic lens group, and the second lens group 106 can include a convex lens 1061 and a concave lens 1062. In one embodiment, the optical axes of the second lens group 106 and the first collimating lens group 105 can be collinear.

In one embodiment, the positions of the mirror surfaces of the first laser beam and the second laser beam incident on the second lens group 106 are different, and neither the first laser beam nor the second laser beam passes through the optical axis of the second lens group.

In one embodiment, the positions of the mirror surfaces of the first laser beam and the second laser beam incident on the second lens group 106 may not be symmetrical with respect to the optical axis of the second lens group 106.

With continued reference to fig. 4-1, the light source assembly 10 in the embodiments of the present disclosure may further include: a third lens 107. The first laser beam and the second laser beam are transmitted through the second lens group 105 and pass through a third lens 107 before being incident on the fluorescent wheel 103, and the third lens 107 may be a light-homogenizing lens, such as a diffusion sheet. The third lens 107 can be disposed between the second lens group 106 and the first and second

reflective portions

1022a and 1022b. The laser emitted by the laser device is condensed into a beam by the second lens group 106 and then emitted to the third lens 107, the third lens 107 can homogenize two different beams of laser and then emit the laser, and the excitation beam with homogenized energy density is beneficial to improving the conversion efficiency of fluorescence excitation.

In one implementation, the third optic may also be a fly-eye lens.

It should be noted that, in the related art, a speckle effect is usually generated when the projection device performs projection display. The speckle effect refers to an effect that after two laser beams emitted by a coherent light source are scattered when irradiating a rough object (such as a screen of a projection device), the two laser beams interfere in space, and finally granular light and dark spots appear on the screen. The speckle effect makes the display effect of the projection image worse, and the spots which are not focused and have alternate light and shade are in a twinkling state when being seen by human eyes, so that the user is easy to feel dizzy when watching for a long time, and the watching experience of the user is worse. In the embodiment of the application, the laser emitted by the light emitting component can become more uniform under the action of the diffusion sheet or the fly-eye lens, and then the interference generated by using the laser for projection is weaker, so that the speckle effect of projection equipment during projection display can be weakened, the phenomenon that a projection image becomes colored is avoided, the display effect of the projection image is improved, and the vertigo generated when people watch the projection image is avoided.

And, on the basis of the above embodiments, fig. 4-2 shows a schematic light path diagram of another light source module provided in the present application.

The difference between the schematic diagrams of the light source modules shown in fig. 2-1, 2-2, and 4-1 is that in fig. 4-2, the light-emitting surface of the light-emitting element 101 is perpendicular to the wheel surface of the fluorescent wheel 103, rather than parallel to the wheel surface. A turning lens 108 is further disposed along the light-emitting surface of the light-emitting assembly 101 for reflecting the light beam emitted from the light-emitting assembly to the wheel surface direction of the fluorescent wheel 103.

In an implementation, the light emitting element 101 may be an MCL-type laser 101, and a light emitting surface of the laser 101 may be perpendicular to a wheel surface or a light receiving surface of the fluorescent wheel 103.

The light source assembly 10 may further include a plurality of turning lenses 108, the turning lenses 108 may be arranged along the light-emitting direction of the laser 101, and the turning lenses 108 are configured to reflect the light beams emitted from the laser 10 to form a plurality of light beams. The distances between the turning mirrors 108 and the light-emitting surface of the laser 101 may be different. As shown in fig. 4-2, the turning mirrors 108 may include two reflecting mirrors, which are respectively used to reflect different portions of the light beam emitted from the laser 101 to form the first laser beam S1 and the second laser beam S2, and there is a gap between the first laser beam S1 and the second laser beam S2.

For example, the distance between each turning lens and the light emitting surface of the laser may include: the distance between any point of the surface of the turning lens close to the laser and the light-emitting surface. The plurality of turning lenses can satisfy: in any two turning lenses, at least part of orthographic projection of one turning lens on the light-emitting surface of the laser is positioned outside the orthographic projection of the other turning lens on the light-emitting surface of the laser; the minimum separation of a point in one turning lens from the laser may be greater than the maximum separation of a point in the other turning lens from the laser. Therefore, the distance between any point in the surface of each turning lens close to the laser and the laser is different from the distance between all points in the surfaces of the other turning lenses close to the laser and the laser.

In one embodiment, each surface of the turning lens may be a reflective surface, or only the surface of the turning lens facing the laser 101 may be a reflective surface. In the embodiment of the present application, the number of turning lenses may be an integer greater than or equal to 1, and fig. 4-2 illustrate that the light source assembly 10 includes two turning lenses, which may also be one, three, four or more in a specific implementation. When the light source assembly only comprises one turning lens, the turning lens can be used for adjusting the transmission direction of laser emitted by the laser. When the light source subassembly includes a plurality of turning lenses, these a plurality of turning lenses can be used for carrying out the beam splitting to the laser that the laser instrument sent, and can also adjust the distance between each bundle of laser that the beam splitting obtained through the position of adjusting each turning lens.

For example, as shown in fig. 7, the laser 101 may emit only one laser beam, the one laser beam may be directed to two turning mirrors 108, each turning mirror 108 may reflect a portion of the one laser beam directed to the turning mirror 108, and the two turning mirrors 108 may divide the one laser beam into a first laser beam S1 and a second laser beam S2. As shown in fig. 7, the larger the distance between the two turning mirrors 108 in the light source module in the x direction (i.e., the light emitting direction of the laser 101), the larger the distance between the two laser beams obtained by splitting the laser beam emitted by the laser 101. Therefore, the distance between the laser beams emitted from the turning mirrors 108 can be adjusted by adjusting the distance between the turning mirrors 108 in the light emitting direction of the laser 101.

And, fig. 4-3 is an embodiment of a further light source module provided on the basis of the examples of fig. 4-1 and 4-2.

In the light source module diagram shown in fig. 4-3, the laser 101 can emit two beams of light, and the two beams of light are formed by the turning action of the turning lens 108 to the second lens group 106. The first laser beam and the second laser beam do not pass through the optical axis of the second lens group 6, and pass through the beam shrinkage of the second lens group 106, and the first laser beam and the second laser beam both thin and avoid the first reflection part 1022a and the second reflection part 1022b, and emit to the first collimating lens group 105. The optical axes of the first collimating lens group 105 and the second collimating lens group coincide, the first laser beam and the second laser beam which are subjected to beam contraction irradiate different positions of the mirror surface of the first collimating lens group, and are converged to enter the same spot position of the fluorescence wheel to excite the fluorescence area of the fluorescence wheel 103 or be reflected by the reflection area of the fluorescence wheel 103.

The first laser beam, the second laser beam, or the first fluorescent light and the second fluorescent light reflected by the fluorescent wheel are sequentially emitted to the first reflector 1022a and the second reflector 1022b, and are reflected by the two reflectors toward the light exit of the light source unit to form a sequential illumination beam.

In the above one and many embodiments of the present disclosure, the first laser beam and the second laser beam emitted by the light emitting component are both used as excitation light, and are emitted to different positions of the mirror surface of the first collimating lens group, so as to excite the fluorescence wheel to generate different first fluorescence and second fluorescence.

First, a first laser beam and a second laser beam are emitted as excitation light, and are incident into a first collimating lens group from different positions, and then the directions of the first collimating lens group and the second collimating lens group incident to the surface of the fluorescence wheel are different.

In this application technical scheme, set up laser excitation light beam into two bundles, to setting up the lens in the excitation light path, two different bundles of light shines to the different positions of lens, can alleviate the lens part and receive the ageing or the performance degradation problem that high energy beam shines and bring for a long time.

And, in a similar way, two laser beams are irradiated to different positions of the collimating lens group, and then the directions of incidence to the fluorescent wheel are also different, when the two laser beams converge on the fluorescent area of the fluorescent wheel, the two laser beams excite the fluorescent area to generate two fluorescent beams, and the two fluorescent beams are reflected by the fluorescent wheel and then are also irradiated to different reflecting components through the collimating lens group. The reflecting component can reflect the two laser beams and the fluorescent beam in the same direction in a time-sharing manner so as to complete light combination.

Moreover, in the technical scheme of the application, the fluorescent wheel is provided with the laser reflection area, and compared with the related art in which the laser reflection area is arranged and then the relay loop system is required to be arranged, the light source assembly in the scheme of the application has fewer optical components and compact light path architecture, and can also take into account the miniaturization of the light source assembly while realizing higher luminous power.

As an improvement or modification of the above embodiment, in a specific implementation, a light collecting component may be further disposed in the light outlet direction of the light source assembly 10, or a collecting lens and a light collecting component are sequentially disposed, so as to complete the collection of the fluorescent light and the laser light beams sequentially reflected by the first reflecting portion and the second reflecting portion, and use the collected fluorescent light and the laser light beams as the output of the light source assembly.

In one embodiment of the present application, the first reflecting portion and the second reflecting portion are two independently disposed mirrors, and the mirrors are full-band mirrors, or mirrors reflecting a specific plurality of bands, such as red band or yellow band, green band, and blue band, which are required to be reflected.

As a variation of one or more of the above embodiments, in another specific implementation of the present application, the first reflection portion and the second reflection portion are respectively a first reflection area and a second reflection area disposed on one light combining lens, and a second transmission area is disposed between the second reflection area and the first reflection area and is used for transmitting any one of the first laser beam and the second laser beam.

The other of the first laser beam and the second laser beam can transmit from the first reflection region or the second reflection region far away from the second transmission region.

Or the light combining lens is also provided with a first transmission area for transmitting the other of the first laser beam and the second laser beam, and a second reflection area is arranged between the first transmission area and the second transmission area.

Fig. 5-1 shows a schematic optical path diagram of a light source module, further including a light combining lens 102, disposed obliquely to a wheel surface of the fluorescent wheel 103, and including at least one transmission region, in this example, the light combining lens 102 includes two transmission regions corresponding to the first laser beam and the second laser beam, where the first transmission region is located at an end of the light combining lens 102 away from the fluorescent wheel 103, the first reflection region is located at an end of the light combining lens 102 close to the fluorescent wheel 103, and the second transmission region and the second reflection region are located between the first reflection region and the first transmission region.

In one embodiment, the laser beam transmitted through the first transmission region is incident to the first reflection region after being irradiated onto the fluorescent wheel and being reflected with the wheel, or exciting the fluorescent wheel to generate fluorescence, and the laser beam transmitted through the second transmission region is incident to the second reflection region after being reflected by the fluorescent wheel.

As shown in fig. 5-1, the first laser beam S1 and the second laser beam S2 respectively transmit through different transmission regions (e.g., a first transmission region 1021a and a second transmission region 1021 b) of the light combining lens 102, and both the first laser beam S1 and the second laser beam S2 are converged by the first collimating lens assembly 105 and then incident on the fluorescence wheel 103. That is, the first laser beam S1 and the second laser beam S2 are emitted to the first collimating lens group 105 through different transmission regions of the light combining lens 102, and then are converged by the first collimating lens group 105 and then emitted to the fluorescent wheel 103.

When the fluorescent region receives the irradiation of the first laser beam S1 and the second laser beam S2 as the fluorescent wheel 103 rotates, the fluorescent light generated by the excitation of the fluorescent region is reflected by the fluorescent wheel 103 and is transmitted through the first collimator group 105; the light combining lens 102 further includes a plurality of reflective regions (e.g., a first reflective region 1022a and a second reflective region 1022 b), fluorescent light transmitted by the first collimating lens assembly 105 is incident to different reflective regions of the light combining lens 102, and the different reflective regions of the light combining lens 102 reflect the fluorescent light toward the light exit. In this case, the first laser beam and the second laser beam are also excitation beams of fluorescence, and the fluorescence emitted by the fluorescence area being excited may be referred to as an excited laser beam. In one embodiment, the light exit direction (i.e., the x direction in fig. 2-1) of the light source module 10 can be perpendicular to the arrangement direction (i.e., the y direction) of the light combining lens 102, the first collimating lens group 105 and the fluorescent wheel 103.

When the reflection area of the fluorescence wheel 103 receives the irradiation of the first laser beam S1 and the second laser beam S2, the first laser beam S1 and the second laser beam S2 are reflected by the reflection area of the fluorescence wheel 103 and are transmitted through the first collimating lens group 105 again, and then are incident to different reflection areas of the light combining lens 102, and the different reflection areas of the light combining lens 102 reflect the first laser beam S1 and the second laser beam S2 toward the light outlet. As shown in fig. 5-1, the first beam of laser light S1 is reflected by the reflection area of the fluorescence wheel 103 and then transmitted through the first collimating lens group 105 again, and then enters the first reflection area 1022a of the light combining lens 102; the second laser beam S2 is reflected by the reflective region of the fluorescent wheel 103 and transmitted through the first collimating lens group 105 again, and then enters the second reflective region 1022b of the light combining lens 102.

Wherein, the transmission area or the reflection area of the light combining lens 102 are arranged at intervals. For example, the transmissive and reflective regions of the combiner lens 102 may alternate. As in fig. 5-1 or 6, a second reflective region 1022b is spaced between the first transmissive region 1012a and the second transmissive region 1012b, and a second transmissive region 1012b is spaced between the first reflective region 1022a and the second reflective region 1022b.

The transmission area in the light combining lens 102 can transmit light (such as a first laser beam and a second laser beam) emitted by the light emitting assembly 101, and the reflection area in the light combining lens 102 can reflect incident light (such as fluorescent light, the first laser beam, and the second laser beam) to the light outlet of the light source assembly 10.

In one embodiment, as shown in fig. 5-1, the first collimating lens group 105 can include at least one convex lens, and the convex arc surface of each convex lens faces the light combining lens 102.

In the above embodiments, the first collimating lens group 105 includes two convex lenses for illustration, for example, the first collimating lens group 105 can also be a lens group formed by a piece of aspheric lens and a piece of plano-convex lens or a lens group formed by a concave-convex lens.

In one embodiment, the first collimating lens group 105 may also include one or three convex lenses. When the first collimating lens group 105 includes a plurality of convex lenses, the plurality of convex lenses may be sequentially arranged along the arrangement direction of the light combining lens 102 and the fluorescent wheel 103, and the optical axes of the plurality of convex lenses are collinear. The first collimating lens group 105 includes a plurality of convex lenses to ensure that the laser light entering the first collimating lens group converges on the fluorescent wheel 103 more accurately.

In one embodiment, as shown in FIG. 5-1, the fluorescence wheel 103 can rotate about the rotation axis Z, such that the laser light (e.g., including the first laser beam and the second laser beam) transmitted from the light combining lens 102 to the fluorescence wheel 103 is switched between the fluorescence area and the reflection area.

In one embodiment, the fluorescent wheel 103 may have a disc shape, the plane of the disc may intersect the first direction, and the rotation axis Z may pass through the center of the circular ring and be perpendicular to the plane of the disc. The fluorescent region of the fluorescent wheel 103 is used for emitting fluorescent light with a color different from that of the laser light under the excitation of the incident laser light; the reflecting region of the fluorescent wheel 103 is used for reflecting the incident laser light. In one embodiment, the fluorescence region can fluoresce in all directions under the excitation of the laser, for example, the luminescence angle of the fluorescence region can be 180 degrees, or other angles less than 180 degrees.

In this embodiment, after the first laser beam and the second laser beam pass through the light combining lens 102 and are emitted to the reflection area of the fluorescent wheel 103, the reflection area of the fluorescent wheel 103 may reflect the first laser beam and the second laser beam to different reflection areas in the light combining lens 102, and then the different reflection areas in the light combining lens 102 may reflect the first laser beam and the second laser beam to the light outlet. After the first laser beam and the second laser beam pass through the light combining lens 102 and are emitted to the fluorescence area of the fluorescence wheel 103, the fluorescence area can emit fluorescence under the excitation of the first laser beam and the second laser beam, and the fluorescence is emitted to the reflection area in the light combining lens 102, so that the fluorescence can be reflected to the light outlet of the light source assembly by the reflection area in the light combining lens 102.

It should be noted that, in fig. 5-1, the transmission process of the light is illustrated only by the case that the first laser beam and the second laser beam emitted by the light emitting assembly 101 respectively transmit through the first transmission region 1021a and the second transmission region 1021b of the light combining lens 102 and further emit to the reflection region of the fluorescence wheel 103. In this case, the light reflected by the reflective region of the fluorescent wheel 103 can be directed to only the reflective region of the light combining lens 102, such as the first reflective region 1022a to which the first laser beam is directed and the second reflective region 1022b to which the second laser beam is directed.

In one implementation, for the case that the light emitted from the light emitting component 101 is directed to the fluorescence area of the fluorescence wheel 103, the fluorescence emitted from the fluorescence area may be directed to both the reflection area and the transmission area of the lens assembly 102, and the light transmission process in this case is not illustrated in the embodiment of the present application.

In the embodiment of the present application, the transmission area in the light combining lens 102 only needs to ensure that the laser emitted by the light emitting component 101 can be transmitted and the fluorescence emitted by the fluorescence area of the fluorescence wheel can be reflected, and the reflection area in the light combining lens 102 only needs to ensure that the laser emitted by the light emitting component 101 and the fluorescence emitted by the fluorescence area of the fluorescence wheel can be reflected; the embodiment of the present application is not limited to whether light with a color different from that of the laser light and the fluorescence can pass through the transmission region or the reflection region in the light combining lens 102. In one implementation, the transmissive region of the light combining lens 102 can reflect light with a color different from both the laser light and the fluorescent light, and the reflective region of the light combining lens 102 can reflect light with all colors.

In one embodiment, the color of the laser light emitted by the light emitting assembly may be blue, that is, the first laser light and the second laser light are both blue laser light, and the color of the fluorescent light emitted by the fluorescent region in the fluorescent wheel under excitation of the blue laser light may include at least one of red, green and yellow. In a specific implementation, the color of the laser light emitted by the light emitting element and the color of the fluorescent light emitted by the fluorescent area may be other colors, which is not limited in the embodiments of the present application.

In the embodiment of the present application, the light emitting element 101 can emit laser light to the light combining lens 102, and the laser light can be emitted to the first collimating lens group 105 through the transmission region in the light combining lens 102, and further emitted to the fluorescent wheel 103 through the first collimating lens group 105. When the light source assembly 10 works, the fluorescent wheel 103 can rotate around the rotation axis Z thereof, and then the laser penetrating through the light combining lens can be switched between the fluorescent area and the reflective area of the fluorescent wheel 103. In the embodiment of the present application, an area irradiated by the laser light emitted from the light emitting assembly at the position of the fluorescent wheel is referred to as an irradiation area of the laser light. For example, as the fluorescent wheel 103 rotates, when the reflective area of the fluorescent wheel 103 is located at the irradiation area, i.e. the laser transmitted through the light combining lens 102 is emitted to the reflective area of the fluorescent wheel 103, the reflective area of the fluorescent wheel 103 can reflect the laser to the reflective area of the light combining lens 102. The reflection area of the light combining lens 102 reflects the laser light to the light outlet of the light source assembly 10. When the fluorescence area of the fluorescence wheel 103 is located in the irradiation area, that is, the laser light transmitted through the light combining lens 102 is emitted to the fluorescence area, the fluorescence area can emit fluorescence having a color different from that of the laser light to the light combining lens 102 under excitation of the laser light. The reflection region of the light combining lens 102 reflects the fluorescence to the light outlet of the light source assembly 10. Thus, the light outlet of the light source assembly 10 outputs laser light and fluorescent light with different colors in a time sequence.

And, on the basis of the embodiment of the light source module shown in fig. 5-1, fig. 5-2 shows a schematic view of the light path of another light source module. Different from the example of fig. 5-1, the light emitting element 101 in fig. 5-2 further includes a turning lens 108 in the light exit path, and the light source assembly further includes a second lens group 106, and further includes a third lens 107, for the relationship between the light emitting element and the turning lens, and the functions of the second lens group 106 and the third lens 107 in the light path, reference may be made to the descriptions in fig. 4-1, fig. 4-2, and fig. 4-3, and no further description is provided herein. Unlike fig. 4-1, 4-2 and 4-3, the first laser beam and the second laser beam are homogenized by the second lens group 106 or the third lens 107, and then specifically enter the transmission regions of the light combining lens 102, such as the first transmission region and the second transmission region, and then enter the first collimating lens group 105 after being transmitted by the first transmission region and the second transmission region.

For example, with continuing reference to fig. 5-1 and fig. 5-2, the first transmission area 1021a is located at an end of the combining lens 102 away from the fluorescent wheel 103, and the first reflection area 1022a is located at an end of the combining lens 102 close to the fluorescent wheel 103. The second transmissive region 1021b may be a transmissive region through which the laser light transmitted to the reflective region in the fluorescent wheel 103 is transmitted, and the first transmissive region 1021a may be a transmissive region through which the laser light transmitted to the fluorescent region in the fluorescent wheel 103 is transmitted. For example, as the fluorescent wheel 103 rotates, when the reflection area of the fluorescent wheel 103 is located at the irradiation area of the laser emitted from the light emitting assembly 101, the laser 101 may emit laser light to the reflective mirror closer to the laser; the laser light may be reflected on the reflective lens and then emitted to the reflective region of the fluorescent wheel 103 through the second transmissive region 1021b, and the reflective region of the fluorescent wheel 103 may reflect the laser light to the second reflective region 1022b. When the fluorescent area on the fluorescent wheel 103 is located at the irradiation area of the laser emitted from the light emitting assembly 101, the laser 101 may emit laser light to the reflective mirror farther from the laser; the laser beam can be reflected by the reflective mirror and then emitted to the fluorescent region through the first transmission region 1021 a; the fluorescent region may emit fluorescent light toward the first reflective region 1022a under excitation of the laser light. Since the optical path of the fluorescent light from the fluorescent wheel 103 to the first reflection area 1022a is short, the light spot formed by the fluorescent light on the first reflection area 1022a is small, the light beam of the fluorescent light is thin, and the first reflection area 1022a easily reflects all the fluorescent light to the light outlet of the light source module.

And, based on the light source module structure of the above embodiments, the light combining lens 102 is described with reference to the accompanying drawings:

in one embodiment, the light combining lens 102 may be disposed obliquely to the traveling direction of the first laser beam and the second laser beam emitted by the light emitting assembly, that is, an included angle exists between the light combining lens 102 and the traveling direction. If the traveling direction of the first laser beam and the second laser beam is the arrangement direction of the light combining lens 102, the first collimating lens set 105 and the fluorescent wheel 103 (i.e. the y direction in fig. 5-1), the light combining lens 102 can be tilted with respect to the y direction. For example, the light combining lens 102 can be tilted toward the light outlet. Alternatively, the light combining lens 102 is disposed to be inclined at 45 degrees with respect to the wheel surface of the fluorescent wheel 103.

In one implementation, the number of transmissive areas and reflective areas in the light combining lens 102 may be greater than or equal to the number of light beams emitted by the light emitting elements. For example, in the embodiment of the present application, the light emitting element 101 emits two beams of light, and the light combining lens 102 includes two transmissive regions and two reflective regions. In a specific implementation, the number of the transmission areas and the reflection areas in the light combining lens 102 may also be three, four or more, which is not limited in this embodiment of the present application. In one embodiment, the light combining lens may include other regions besides the transmissive regions and the reflective regions, and no light may be emitted to the other regions.

Illustratively, as shown in the plan structure diagrams of the light combining lens in fig. 5-1, fig. 5-2 and fig. 6, the light combining lens 102 includes a first transmissive region 1021a, a second transmissive region 1021b, a first reflective region 1022a and a second reflective region 1022b. The transmissive regions and the reflective regions in the light combining lens 102 may be alternately arranged along a second direction (e.g., an x direction in fig. 5-1), for example, the first reflective region 1022a, the second transmissive region 1021b, the second reflective region 1022b, and the first transmissive region 1021a may be sequentially arranged along the second direction. The light combining lens 102 is tilted towards the light exit, for example, tilted at 45 degrees, so that the first transmission region 1021a can be disposed away from the first collimating lens set 105, and the first reflection region 1022a can be disposed close to the first collimating lens set 105. It should be noted that the light combining lens 102 is disposed in an inclined manner at 45 degrees, that is, an included angle between the light combining lens 102 and a traveling direction of the laser light emitted by the light emitting assembly is 45 degrees. The included angle may also be other angles, and the embodiment of the present application is not limited.

In this embodiment, each transmission area in the light combining lens 102 may correspond to a reflection area, and if light transmitted from a certain transmission area is reflected by the reflection area of the fluorescent wheel, the light may be reflected by the reflection area of the fluorescent wheel and then emitted to the reflection area corresponding to the transmission area in the light combining lens. If the light transmitted from a certain transmission area is incident to the fluorescence area of the fluorescence wheel, the excited fluorescence is reflected by the fluorescence wheel and then at least emits to the reflection area corresponding to the transmission area in the light combining lens. For example, with reference to fig. 6, the first transmissive area 1021a of the light combining lens 102 corresponds to the first reflective area 1022a, and the second transmissive area 1021b corresponds to the second reflective area 1022b.

In one embodiment, the area of the first transmission region 1021a in the light combining lens 102 may be smaller than the area of the second transmission region 1021b, and the area of the first reflection region 1022a may be smaller than the area of the second reflection region 1022b.

With reference to fig. 5-1 and fig. 5-2, the distance between the first transmission area 1021a and the light emitting device 101 may be smaller than the distance between the second transmission area 1021b and the light emitting device 101, and the optical path of the laser (e.g., the first laser beam S1) from the light emitting device 101 to the first transmission area 1021a is shorter than the optical path of the laser (e.g., the second laser beam S2) from the light emitting device 101 to the second transmission area 1021 b; the distance between the first reflection region 1022a and the fluorescent wheel 103 is smaller than the distance between the second reflection region 1022b and the fluorescent wheel 103, and the optical path of the light (such as the first laser beam S1 or the fluorescent light) from the fluorescent wheel 103 to the first reflection region 1022b is shorter than the optical path of the light (such as the second laser beam S2 or the fluorescent light) from the fluorescent wheel 103 to the first reflection region 1022 a. Since the light spot formed by the shorter optical path of the light is smaller, the light spot on the first transmission area 1021a may be smaller than the light spot on the second transmission area 1021b, and the light spot on the first reflection area 1022a may be smaller than the light spot on the second reflection area 1022b. Furthermore, the first transmissive region 1021a only needs a small area to complete transmission of the incident laser, and the first reflective region 1022a only needs a small area to complete reflection of the incident light, so the area of the first transmissive region 1021a can be smaller than that of the second transmissive region 1021b, and the area of the first reflective region 1022a can be smaller than that of the second reflective region 1022b.

In the embodiment of the present application, the functions of the reflective area and the transmissive area in the light combining lens 102 can be realized in the following manner.

In an alternative mode, functional film layers can be arranged on different areas of the light-transmitting substrate to obtain the light-combining lens. For example, for the reflective area, the reflective area of the light combining lens 102 may have a coating. The coating film can be a full-wave band reflecting film, or the coating film is a reflecting film aiming at least one wave band of a red light wave band, a green light wave band and a blue light wave band. The coating film may be located on a side of the light combining lens 102 close to the first collimating lens group 105, or on a side of the light combining lens 102 far from the first collimating lens group 105, which is not limited in the embodiments of the present disclosure. For the transmission area, the light combining lens 102 is disposed on a side close to the first collimating lens group 105, and a dichroic film is disposed on at least a surface of the transmission area. The dichroic film may be configured to transmit blue light and reflect at least one of red, yellow, and green light. For example, the fluorescent light emitted from the fluorescent area of the fluorescent wheel to the light combining lens 102 includes red light, and even if the fluorescent light is emitted to the transmission area, the fluorescent light is reflected by the dichroic film and further emitted to the light outlet of the light source module on the basis that the dichroic film is arranged on the surface of the transmission area of the light combining lens 102, so that the utilization rate of the fluorescent light is improved.

In another alternative, the reflective area of the light combining lens 102 can also be directly made of a reflective material. In one embodiment, the transmissive region of the light combining lens 102 can also be directly made of a dichroic material that transmits blue light and reflects at least one of red light, yellow light and green light. At this time, the plating film and the dichroic film may not be provided.

In one embodiment, an antireflection film is disposed on a side of the light combining lens 102 away from the first collimating lens group 105; or, an antireflection film is disposed in a transmission area of the light combining lens 102 on a side away from the first collimating lens group 105. In an embodiment, the transmittance of the antireflection film is increased for a full spectrum of light, or the transmittance of the antireflection film is increased only for laser (such as blue laser) emitted by the light emitting device, which is not limited in the embodiment of the present disclosure.

And, in the schematic light path diagram of the light source module shown in fig. 5-2, the number of turning lenses 108 in the light source module may be the same as the number of transmission regions in the light combining lens, and each turning lens in the light source module may correspond to each transmission region in the light combining lens one to one. Each turning lens can reflect the incident laser to the corresponding transmission area. For example, with reference to fig. 5-2, in the two turning lenses 108, the turning lens close to the laser corresponds to the first transmission area 1021a in the light combining lens 102, and the turning lens reflects the incident laser to the first transmission area 1021a. The turning lens far away from the laser corresponds to the second transmission area 1021b in the light combining lens 102, and the turning lens can reflect the incident laser to the second transmission area 1021b. In the embodiment of the application, the position of the corresponding turning lens can be designed according to the position of each transmission area in the light combining lens, so that each turning lens can reflect the incident laser to the corresponding transmission area.

In the light source subassembly that this application embodiment provided, close the light lens and include a plurality of transmission areas and reflecting area, the fluorescence wheel includes fluorescence area and reflecting area, and first bundle of laser and the second bundle of laser that light emitting component sent are as the exciting light, can see through and close the equal shoot of first collimating lens group of different transmission areas in the light lens, and then through the first collimating lens group after the convergence to the fluorescence wheel. When the two beams of light are emitted to the reflecting area of the fluorescent wheel along with the rotation of the fluorescent wheel, the two beams of light are reflected by the reflecting area of the fluorescent wheel, and are emitted to different reflecting areas of the light combining lens after passing through the first collimating lens group again, and then are reflected to the direction of the light outlet of the light source component by the different reflecting areas. When the two beams of light irradiate the fluorescent area, the two beams of light excite the fluorescent area to generate fluorescence, the fluorescence is reflected by the fluorescent wheel and then is emitted to different reflecting areas of the light combining lens, and then the different reflecting areas reflect the fluorescence to the direction of the light outlet. Therefore, along with the rotation time sequence of the fluorescent wheel, the light source component can realize that two bundles of light emitted by the light-emitting component and the fluorescent light generated by the stimulated emission of the fluorescent area are all combined by the same light combining lens after being reflected by the fluorescent wheel, and are all reflected to the light outlet direction of the light source component by the light combining lens, so that the light source component has a compact light path structure, less optical lenses can realize the combination of the excitation light beams and the laser beams, and the volume of the light source component is smaller.

In addition, since the laser light is lost when passing through the dichroic mirror, and the laser light needs to pass through the dichroic mirror twice in the process of emitting the excitation light beam to the light outlet in the related art, the loss of the excitation light beam is high. In the embodiment of the application, the excitation light beam can be emitted to the light outlet through the light combining lens only once, so that the loss of the excitation light beam is reduced.

And, based on the light source module architectures of the embodiments, the light emitting module is described with reference to the accompanying drawings:

in one implementation, the first laser and the second laser emitted by the light emitting assembly 101 may have overlapping wavelength bands. Illustratively, the first laser and the second laser may each be blue light. For example, the wave bands of the first laser beam and the second laser beam can be 400-450 nm; or the wave band of the first beam of laser can be 400-430 nanometers, and the wave band of the second beam of laser can be 420-450 nanometers; or the wavelength bands of the first laser beam and the second laser beam may also be other wavelength bands, which is not limited in the embodiment of the present application.

In one implementation, the dominant wavelengths of the first and second lasers are different. For example, the first laser beam and the second laser beam may be blue light with different dominant wavelengths. It should be noted that a beam of light is obtained by combining light of a plurality of wavelengths in a wavelength band, and the beam of light is perceived by the human eye as a result of the combination of the wavelengths of light, and the human eye perceives the beam of light as corresponding to a single wavelength, which is the dominant wavelength of the beam of light.

The first laser beam and the second laser beam in the embodiment of the present application may originate from the same light emitting assembly, or the first laser beam and the second laser beam may also originate from different light emitting assemblies, which is not limited in the embodiment of the present application. The light emitting assembly can be a multi-chip Laser Diode (MCL) type Laser, the MCL type Laser can include a plurality of light emitting chips packaged in the same tube shell in an array arrangement, and each light emitting chip can independently emit Laser. The first laser beam and the second laser beam are emitted from different light emitting areas of the laser, for example, the first laser beam and the second laser beam may be emitted from different light emitting chips of the laser.

With continued reference to fig. 2-1, 2-2, 4-1, and 5-1, the light emitting surface of the laser 101 and the wheel surface or the light receiving surface of the fluorescent wheel 103 may be parallel to each other.

The laser 101, the light combining lens 102 or the first reflection part 1022a, the second reflection part 1022b, the first collimating lens group 105, and the fluorescence wheel 103 are sequentially arranged along the light emitting direction of the laser 101, for example, the laser can directly emit laser to the transmission region of the light combining lens 102.

In one implementation, the laser 101 may emit a laser beam that may be directed to each transmissive region of the combiner optic 102. Alternatively, the laser 101 may emit a plurality of laser beams such that each laser beam is directed to one transmissive area.

In the first light emitting mode of the laser, the laser may emit laser light to all of the plurality of reflecting mirrors at the same time. For example, the laser may include a plurality of light emitting chips, and the plurality of light emitting chips may emit light simultaneously, thereby enabling the laser to emit laser light to a plurality of reflective mirrors simultaneously. In this case, the laser beam emitted from the laser is thick, the brightness of the laser beam is high, and the laser beam is high when it passes through the reflecting mirror, the transmitting area in the light combining mirror, the fluorescent wheel, and the reflecting area in the light combining mirror and then is emitted to the condensing lens. Therefore, the converging lens can use the light with higher brightness for projection of the projection equipment, so that the brightness of the image obtained by projection of the projection equipment is higher, and the projection effect of the projection equipment is better.

In the second light emitting mode of the laser, the laser can emit laser light to different reflecting mirrors at different times. For example, the laser includes a plurality of light emitting chips, each of which corresponds to one of the mirror plates, and each of the light emitting chips is capable of emitting light toward the corresponding mirror plate. The light emitting chips emitting light in the laser at different time are different, so that the laser can emit laser to different reflecting lenses at different time. In this case, since only a part of the light emitting chips in the laser emit light at the same time, the beam of the emitted laser light is thin, and the beam of the laser light is thin when the laser light is emitted to the condensing lens after passing through the reflection mirror, the transmission region in the light combining mirror, the fluorescent wheel, and the reflection region in the light combining mirror. Therefore, the laser beams can be ensured to be easily and completely irradiated into the converging lens, the waste of the laser is avoided, and the simplicity of converging light of the converging lens is improved. In this case, the light emitting chip in the laser does not need to continuously emit light, so that the pulse current can be used for supplying power to the light emitting chip, and the energy of the pulse current is higher, so that the laser light emitting chip can emit laser with higher brightness. And the light-emitting chip in the laser does not need to continuously emit light, so that the service life of the light-emitting chip in the laser can be prolonged.

In one embodiment, the laser may emit laser light to different reflective mirrors according to the switching timing of the fluorescent regions and the reflective regions in the fluorescent wheel, so that the laser light reflected by different reflective mirrors passes through the corresponding transmissive regions to emit to different regions (such as the fluorescent regions and the reflective regions) of the fluorescent wheel. In a specific implementation, the timing of the laser emitting light to each reflective mirror may also be independent of the switching timing of the fluorescent area and the reflective area in the fluorescent wheel, and the embodiment of the present application is not limited thereto.

The transmission of the light emitted by the light emitting assembly and the relationship between the first collimating lens set and the light combining lens set will be described with reference to the accompanying drawings:

the laser beams transmitted through the transmission region of the light combining lens 102 can transmit through the region outside the optical axis h of the first collimating lens group 105, and the first collimating lens group 105 can converge the incident laser beams to the fluorescent wheel 103, for example, to the region of the fluorescent wheel 103 passing through the optical axis of the first collimating lens group 105. It should be noted that there is no change in optical characteristics when light enters the first collimating lens group along the optical axis of the first collimating lens group, and if laser passing through the transmission region in the light combining lens passes through the first collimating lens group along the optical axis of the first collimating lens group and is emitted to the fluorescent wheel, light emitted from the fluorescent wheel also passes through the first collimating lens group along the optical axis of the first collimating lens group and is emitted to the transmission region, so that the laser cannot reach the converging lens. Therefore, in the embodiment of the present application, the laser light emitted by the light emitting element needs to be emitted to the region outside the optical axis of the first collimating lens group through the transmissive region, and further emitted to the fluorescent wheel.

In one embodiment, the first laser beam and the second laser beam emitted by the light emitting device can be incident on different mirror positions of the first collimating lens group. In one embodiment, the positions of the mirror surfaces of the first collimating lens group, on which the first laser beam and the second laser beam are incident, are not symmetrical with respect to the optical axis of the first collimating lens group. Therefore, the situation that the first laser beam is reflected to the transmission area where the second laser beam enters by the reflection area when the first laser beam is converged to the reflection area of the fluorescent wheel can be avoided.

In one embodiment, the connection line between the position of the mirror surface of the first collimating lens group where the first laser beam and the second laser beam are incident and the position of convergence on the fluorescent wheel is different from the included angle formed by the optical axis of the first collimating lens group. If a connecting line of a position irradiated by a first laser beam in the first collimating lens group and a convergence position of the first laser beam on the fluorescent wheel is a first connecting line, and an included angle between the first connecting line and an optical axis of the first collimating lens group is a first included angle; a connecting line between the position irradiated by the second laser beam in the first collimating lens group and the convergence position of the second laser beam on the fluorescent wheel is a second connecting line, and the included angle between the second connecting line and the optical axis of the second lens group is a second included angle; the first included angle is different from the second included angle. For example, referring to fig. 2-2, a first included angle formed by the first laser beam S1 and the optical axis h of the first collimating lens group 102 is an angle α, a second included angle formed by the second laser beam S2 and the optical axis h of the first collimating lens group 102 is an angle β, and α > β. Therefore, the first laser beam and the second laser beam can be incident on the mirror surface of the first collimating lens group at different incident angles, for example, the convex surface of the first lens of the first collimating lens group, but according to the reflection principle, the respective reflection light paths of the first laser beam and the second laser beam will not overlap. The first finger lens is a lens close to the light combining lens in the first collimating lens group.

In one embodiment, for each transmissive region and the corresponding reflective region in the light combining lens 102, the transmissive region and the reflective region are respectively located at two sides of the optical axis h of the first collimating lens group 105; at least a partial orthographic projection of the transmissive region on the luminescent wheel 103 is symmetrical to at least a partial orthographic projection of the reflective region on the luminescent wheel 103 about the optical axis h. The orthographic projection of a certain component on the fluorescent wheel in the embodiment of the application can refer to the orthographic projection of the component on the disk surface of the fluorescent wheel. In one embodiment, when the light combining lens 102 includes a plurality of transmissive areas and a plurality of reflective areas, the transmissive areas may be located on two sides of the optical axis h and are not symmetrical with respect to the optical axis h, and the transmissive areas and the reflective areas in the light combining lens 102 may be alternately arranged.

Illustratively, the second transmissive regions 1021b and the corresponding second reflective regions 1022b are located on two sides of the optical axis h of the first collimating lens assembly 105, and the first transmissive regions 1021a and the corresponding first reflective regions 1022a are located on two sides of the optical axis h of the first collimating lens assembly 105. The second transmission regions 1021b and the first transmission regions 1021a are also located at two sides of the optical axis h of the first collimating lens assembly 105, and are not symmetric with respect to the optical axis h, so as to ensure that the laser emitted to one transmission region is not emitted from the other transmission region. In one embodiment, a distance between the first transmission area 1021a and the optical axis h may be greater than a distance between the second transmission area 1021b and the optical axis h, so as to ensure that after the laser light passing through the first transmission area 1021a excites the fluorescence emitted by the fluorescence area, the first reflection area 1022a irradiated by the fluorescence is farther from the optical axis h than the second reflection area 1022b, thereby ensuring that an optical path from the fluorescence to the first reflection area 1022a is shorter, and a light spot formed by the fluorescence in the first reflection area 1022a is smaller.

It should be noted that, for the case that the laser in the light emitting assembly emits light to each of the reflective mirrors at the same time, reference may be made to the introduction that the light emitting assembly emits laser to different reflective mirrors according to the switching timing sequence of the fluorescence area and the reflection area in the fluorescence wheel, and this embodiment is not described again.

In summary, the light combining lens includes a plurality of transmission regions and reflection regions, the fluorescence wheel includes a fluorescence region and a reflection region, and a first laser beam and a second laser beam emitted by the light emitting assembly serve as excitation light and can all irradiate to the first collimating lens group through different transmission regions in the light combining lens, and then irradiate to the fluorescence wheel after being converged by the first collimating lens group. When the two beams of light are emitted to the reflecting area of the fluorescent wheel along with the rotation of the fluorescent wheel, the two beams of light are reflected by the reflecting area of the fluorescent wheel, and are emitted to different reflecting areas of the light combining lens after passing through the first collimating lens group again, and then are reflected to the direction of the light outlet of the light source component by the different reflecting areas. When the two beams of light irradiate the fluorescent area, the two beams of light excite the fluorescent area to generate fluorescence, the fluorescence is reflected by the fluorescent wheel and then is emitted to different reflecting areas of the light combining lens, and then the different reflecting areas reflect the fluorescence to the direction of the light outlet. Therefore, along with the rotation time sequence of the fluorescent wheel, the light source assembly can realize that two beams of light emitted by the light-emitting assembly and fluorescent light generated by the stimulated emission of the fluorescent area are combined by the same light combining lens after being reflected by the fluorescent wheel, and are reflected to the direction of the light outlet of the light source assembly by the light combining lens, so that the light source assembly has a compact light path structure, the combination of the excitation light beams and the received laser beams can be realized by fewer optical lenses, and the size of the light source assembly is smaller.

It should be noted that the above embodiments of the present application are only explained by taking the light source assembly including the light emitting assembly for emitting light of one color as an example. In one embodiment, the light source module may also include a plurality of light-emitting elements, each of which may emit light of one color.

The technical scheme of the application also provides a laser projection device, and as shown in a schematic diagram of an ultra-short-focus laser projection device in fig. 9, the projection device projects obliquely upwards to an optical screen for imaging, the projection device is closer to a plane where the optical screen is located, and large-size projection display can be realized with a smaller projection ratio.

And, FIG. 8 shows a projection light path schematic of a laser projection device. As shown in fig. 8, the light beam output by the light source assembly 100 is incident into the optical engine 200, and the optical engine 200 further emits the light beam into the lens 300.

The light source module 100 further includes a plurality of optical lenses for combining and condensing the laser beam and the fluorescent beam.

The light beam emitted from the light source assembly 100 is incident to the optical engine 200, and a homogenizing component, such as a light pipe, is disposed at the front end of the optical engine 200 for receiving the illumination light beam of the light source, and has the functions of mixing and homogenizing, and the outlet of the light pipe is rectangular, and has a shaping effect on the light spot. The optical engine 200 further includes a plurality of lens groups, and the TIR or RTIR prism is used to form an illumination light path, and to inject the light beam to the light valve, which is a key core device, and to inject the light beam modulated by the light valve into the lens group of the lens 300 for imaging.

The Light valve may include a variety of structures such as LCOS, LCD or DMD, depending on the projection structure, and in this example, a DLP (Digital Light Processing) projection structure is used, and the Light valve is referred to as a DMD chip or Digital micromirror array. Before the light beam of the light source 100 reaches the light valve DMD, the light path of the light machine is shaped to make the illumination light beam conform to the illumination size and the incident angle required by the DMD. The DMD surface includes thousands of tiny mirrors, each of which can be individually driven to deflect, such as plus or minus 12 degrees or plus or minus 17 degrees in a DMD chip provided by TI. The light reflected by the positive deflection angle is called ON light, the light reflected by the negative deflection angle is called OFF light, and the OFF light is invalid light and generally hits the housing or is absorbed by a light absorption device. The ON light is an effective light beam which is irradiated by the illumination light beam received by a tiny mirror ON the surface of the DMD light valve and enters the lens 300 through a positive deflection angle, and is used for projection imaging. The quality of the illumination beam emitted from the light source assembly 100 directly affects the quality of the beam irradiated onto the surface of the light valve DMD, so that the beam is projected and imaged by the lens 300 and then reflected on a projection picture.

In this example, the lens 300 is an ultra-short-focus projection lens, and a light beam modulated by a light valve enters the lens and finally exits in an oblique direction, which is different from a light exit mode in which an optical axis of a projection light beam is located at a perpendicular line in a projection picture in a conventional long-focus projection, the ultra-short-focus projection lens usually has an offset of 120% to 150% relative to the projection picture, the projection mode has a smaller throw ratio (which can be understood as a ratio of a distance from a projection host to a projection screen to a size of a diagonal line of the projection picture), for example, about 0.2 or even smaller, so that the projection device and the projection screen can be closer to each other, and thus the projection device is suitable for home use, but the light exit mode also determines that the light beam has higher uniformity, otherwise, the luminance or chromaticity non-uniformity of the projection picture is more obvious compared with the conventional long-focus projection.

In this example, when a DMD light valve assembly is used, the light source 100 can output three primary colors in a time sequence, and the human eye cannot distinguish the colors of light at a certain time according to the principle of three-color mixing, and still perceives mixed white light. When a plurality of light valve components, such as three DMD or three LCD liquid crystal light valves, are used, the three primary colors of light in the light source 100 can be simultaneously lighted to output white light.

The projection equipment that this application embodiment provided owing to use the light source subassembly in above-mentioned a plurality of embodiments, above-mentioned light source subassembly has cancelled the blue light return circuit to less optical lens and compact optics framework realize the output of at least three chromatic light, on the miniaturized basis of above-mentioned light source subassembly, also do benefit to the miniaturization that realizes laser projection equipment optical engine structure, and still can bring the facility for arranging of other structures in the projection equipment, for example this other structures can include heat radiation structure or circuit board.

The term "and/or" in this application is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship. The term "at least one of a and B" in the present application is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, at least one of a and B may mean: a exists alone, A and B exist simultaneously, and B exists alone. The term "A, B and at least one of C" means that there may be seven relationships that may mean: there are seven cases of A alone, B alone, C alone, both A and B, both A and C, both C and B, and both A, B and C. In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A light source assembly, comprising:

the light combining lens comprises a plurality of reflecting areas and a plurality of transmitting areas which are alternately arranged; the light combining lens is arranged obliquely to the wheel surface of the fluorescent wheel;

one of the first laser beam and the second laser beam penetrates through one of the transmission areas, the other one of the first laser beam and the second laser beam penetrates through the other transmission area, and both the first laser beam and the second laser beam enter the fluorescence wheel after passing through the first collimating lens group; the first laser beam and the second laser beam do not pass through the optical axis of the first collimating lens group and are not symmetrical about the optical axis;

the fluorescence area is used for being stimulated to generate first fluorescence and second fluorescence, and the first fluorescence and the second fluorescence are reflected by the fluorescence wheel and are incident on the light-combining lens;

the reflecting area of the fluorescence wheel is used for reflecting the first laser beam and the second laser beam to the light combining lens;

and the light combining lens reflects the laser beams and the fluorescent beams to a light outlet of the light source component in a time-sharing manner.

2. The light source module according to claim 1, wherein one of the transmissive regions and one of the reflective regions correspond to each other and are respectively located on both sides of the optical axis of the first collimating lens group.

3. The light source module as claimed in claim 1, further comprising a second mirror group disposed between the light emitting assembly and the first and second reflecting portions for reducing speckle of the first and second laser beams emitted from the light emitting assembly.

4. The light source assembly according to claim 3, wherein the positions of the mirror surfaces of the first laser beam and the second laser beam incident on the second lens group are different, and neither of the mirror surfaces passes through the optical axis of the second lens group.

5. The light source assembly of claim 1, further comprising a third lens for homogenizing the first laser beam and the second laser beam.

6. The light source assembly of claim 5, wherein the third lens is a diffuser or a fly-eye lens.

7. The light source module as claimed in claim 1, wherein the light combining lens is formed by coating a plurality of reflective regions on the light-transmissive substrate, and the reflective regions are arranged at intervals.

8. Light source assembly according to claim 1 or 7,

the light-combining lens forms a plurality of transmission areas by arranging the dichroic film on the light-transmitting substrate, and the transmission areas are arranged at intervals.

9. The light source module as claimed in claim 8, wherein a plurality of turning lenses are further disposed along a light-emitting surface of the light-emitting module, and each of the turning lenses corresponds to each of the transmissive regions one to one; the turning lenses have different distances from the light-emitting surface of the light-emitting component.

10. The light source assembly of claim 8, wherein the plurality of transmissive regions are located on both sides of an optical axis of the first collimating lens group and are not symmetric about the optical axis.

11. The light source module as claimed in claim 1, wherein the first laser beam and the second laser beam are emitted from different light emitting areas of a same light emitting module, and the light emitting chips in the light emitting module are arranged in an array.

12. A projection device, characterized in that the projection device comprises: the light source module of any one of claims 1 to 11, and an opto-mechanical and lens;

the light source assembly is used for emitting illuminating beams to the light machine, the light machine is used for modulating the illuminating beams emitted by the light source assembly and projecting the illuminating beams to the lens, and the lens is used for imaging the light beams modulated by the light machine.