WO2021259276A1 - 光源组件和投影设备 - Google Patents

光源组件和投影设备 Download PDF

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Publication number
WO2021259276A1
WO2021259276A1 PCT/CN2021/101575 CN2021101575W WO2021259276A1 WO 2021259276 A1 WO2021259276 A1 WO 2021259276A1 CN 2021101575 W CN2021101575 W CN 2021101575W WO 2021259276 A1 WO2021259276 A1 WO 2021259276A1
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WIPO (PCT)
Prior art keywords
light
lens
laser beam
laser
area
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PCT/CN2021/101575
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English (en)
French (fr)
Inventor
李巍
韩五月
田有良
Original Assignee
青岛海信激光显示股份有限公司
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Publication of WO2021259276A1 publication Critical patent/WO2021259276A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G02B26/04—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light by periodically varying the intensity of light, e.g. using choppers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam

Definitions

  • This application relates to the field of optoelectronic technology, and in particular to a light source assembly and projection equipment.
  • Laser has the advantages of high brightness, good monochromaticity, long life, etc., and is used in the field of optoelectronic technology.
  • laser projection equipment uses at least one color laser as the projection light source.
  • a blue laser light source can be used as the excitation light source and The blue primary light source, and the fluorescent wheel is used to generate other primary color light except blue light, or the blue laser light source and the red laser light source are used, and the fluorescent wheel is used to generate at least other primary light except blue and red light.
  • a blue laser light source, a red laser light source, and a green laser light source are used instead of a fluorescent wheel to generate fluorescence.
  • Laser projection equipment using blue laser light source and red laser light source needs to increase the placement of red laser components on the basis of the original blue laser light source excitation phosphor wheel scheme, so the volume of the two-color laser light source is usually relatively large.
  • a light source assembly including:
  • the first light-emitting component is used to emit the first laser beam and the second laser beam;
  • the second light-emitting component is used to emit a third laser beam, the color of the third laser beam is different from the first laser beam and the second laser beam;
  • the fluorescent wheel is provided with a fluorescent area and a reflective area;
  • Converging lens group used to converge the first laser beam and the second laser beam into the fluorescent wheel
  • the light-combining lens is arranged between the first light-emitting component, the second light-emitting component and the fluorescent wheel, wherein the third light beam is transmitted through the light-combining lens and directed toward the light outlet of the light source component.
  • the light-combining lens has a plurality of reflection areas and At least one transmission zone,
  • the first light and the second light are respectively transmitted through different transmission areas of the light combining lens and directed to the fluorescent wheel.
  • the fluorescent area can be stimulated to generate the first fluorescent light and the second fluorescent light respectively; both the first fluorescent light and the second fluorescent light are driven by the fluorescent wheel After being reflected, it enters the different reflection areas of the light combining lens, and is respectively reflected by the different reflection areas of the light combining lens toward the light exit direction of the light source assembly;
  • the first laser beam and the second laser beam can also be reflected by the reflection area of the fluorescent wheel, enter different reflection areas of the light combining lens, and be respectively reflected by the different reflection areas of the light combining lens toward the light exit direction of the light source assembly.
  • a projection device in another aspect, includes: the light source assembly described in the above technical solution, and an optical machine and a lens;
  • the light source assembly is used for emitting an illuminating beam to the optical machine, and the optical machine is used for modulating the illuminating beam emitted by the light source component and projecting it to a lens, and the lens is used for projecting and imaging the light beam modulated by the optical machine.
  • Figure 1-1 is a schematic diagram of a light path of a light source assembly provided by an embodiment of the present application
  • Figure 1-2 is a schematic diagram of the optical path of the laser beam incident on the fluorescent wheel provided by the embodiment of the present application;
  • Figure 2-1 is a schematic diagram of a light path of a light source assembly provided by an embodiment of the present application
  • Figure 3-1 is a schematic diagram of a wheel surface of a fluorescent wheel provided by an embodiment of the present application.
  • Fig. 3-2 is a schematic diagram of a wheel surface of a fluorescent wheel provided by an embodiment of the present application.
  • Figure 4-1 is a schematic diagram of the light path of another light source assembly provided by an embodiment of the present application.
  • 4-2 is a schematic diagram of the optical path of another light source assembly provided by an embodiment of the present application.
  • Figure 5-1 is a schematic diagram of a light-combining lens provided by an embodiment of the present application.
  • Fig. 5-2 is a schematic diagram of another light-combining lens provided by an embodiment of the present application.
  • 6-1 and 6-2 are schematic diagrams of light paths of a light-emitting component provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an optical path of a projection device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a projection device provided by an embodiment of the present application.
  • Fig. 9-1 and Fig. 9-2 are schematic diagrams of the structure of the light-emitting assembly applied in the embodiment of the present application.
  • the laser projection device may include: a light source assembly, an optical machine and a lens, where the light source assembly serves as a light source, the optical engine is located on the light output side of the light source assembly, and the lens is located on the light output side of the optical engine.
  • the light source assembly is used to provide illuminating light beams, which can provide three primary colors in a sequential manner (or add other colors on the basis of the three primary colors), mix the lights to form white light, or output the three primary colors at the same time to continuously emit white light.
  • the optical machine includes the core light modulation component, which is used to modulate the illumination beam emitted by the light source assembly according to the image display signal to form a beam with image information, and converge these beams to the lens.
  • the lens is used to modulate the optical machine.
  • the beam of light is projected and imaged.
  • the light source assembly includes a laser, which can emit laser light of at least one color, such as blue laser light.
  • the light modulation component in the optical machine can be a DMD digital micro-mirror array or an LCD liquid crystal light valve.
  • the lens can be a telephoto lens or a short-focus lens.
  • the laser projection device may be based on the DLP projection architecture, in which the light modulation component is a DMD chip, and the lens may be an ultra-short throw lens, so the laser projection device in this example can be an ultra-short throw laser projection
  • the laser projection device in this example can be an ultra-short throw laser projection
  • the device can realize the projection of larger screens with a smaller projection ratio.
  • FIG. 1-1 it is a light path architecture diagram of a light source assembly provided by an embodiment of the present application
  • FIG. 2-1 is a schematic diagram of a fluorescence excitation light path based on the light source assembly of FIG. 1-1.
  • the light source assembly 10 may include:
  • the first light emitting component 1011 is used to emit a first laser beam S1 and a second laser beam S2.
  • the second light-emitting component 1012 is used to emit a third laser beam S3, wherein the color of the third laser beam is different from the first laser beam S1 and the second laser beam S2;
  • the fluorescent wheel 103 is provided with a fluorescent area and a reflective area (the fluorescent area and the reflective area are not shown in the figure, but are shown in other drawings), and the fluorescent wheel 103 is not provided with a light-transmitting area;
  • the condensing lens group 105 located on the front of the fluorescent wheel 103, is arranged in the light path of the first laser S1 and the second laser S2 incident on the fluorescent wheel 103, and is used to converge the excitation light beam to form a smaller excitation light
  • the light spot specifically, is used to converge the first laser beam S1 and the second laser beam S2 into the fluorescent wheel 103.
  • the first laser beam S1 and the second laser beam S2 are respectively incident on different positions of the mirror surface of the converging lens group 105, and both are converged by the converging lens group 105 and then incident on the fluorescent wheel 103.
  • the light combining lens 102 is located between the first light emitting component 1011, the second light emitting component 1012 and the fluorescent wheel 103, that is, the light combining lens 102 is arranged around the above three light output components from three directions.
  • the fluorescent area and the reflective area will be irradiated by the laser beam alternately.
  • the first laser S1 and the second laser S2 can be emitted from the first light-emitting assembly at the same time, which can also be regarded as simultaneous Used to excite the fluorescent area.
  • the first laser beam S1 and the second laser beam S2 are incident on the converging lens group 105, neither of them passes through the optical axis h of the converging lens group 105, and is not symmetrical about the optical axis h. Further, the first laser beam S1 and the second laser beam S2 are distributed on both sides of the optical axis h of the condenser lens group 105 and are not symmetrical about the optical axis h.
  • the first laser beam S1 and the second laser beam S2 are incident on the line connecting the mirror position on the converging lens group 105 and their respective converging positions on the fluorescent wheel 103, and the optical axis h of the converging lens group 105
  • the included angles are different.
  • one included angle is ⁇
  • the other is ⁇ , where ⁇ .
  • the two laser beams can be located on both sides of the optical axis h, or on one side of the optical axis h.
  • two lasers are distributed on both sides of the optical axis h as an example.
  • the distance between the first laser S1 and the second laser S2 incident on the mirror surface of the condenser lens group 105 to the optical axis h of the condenser lens group 105 is different, for example, one distance is d1 and the other is distance d2, where d1 ⁇ d2, it should be noted that when the distance between the two laser beams is different from the optical axis h, the two laser beams can be located on both sides of the optical axis h, or on one side of the optical axis h. In this example, two lasers are distributed on both sides of the optical axis h as an example.
  • the fluorescent area can be excited to generate the first fluorescent E1 and the second fluorescent E2, respectively, and both the first fluorescent E1 and the second fluorescent E2 can be driven by the fluorescent wheel 103 reflects and transmits through the convergent lens group 105 and then enters the first reflection area 1022a and the second reflection area 1022b of the light combining lens 102, respectively.
  • the first reflection area 1022a and the second reflection area 1022b are arranged obliquely to the wheel surface of the fluorescent wheel 103.
  • the first reflection area 1022a and the second reflection area 1022a are different areas of the same light combining lens and are arranged along the same inclination angle.
  • the light combining lens 102 also has at least one transmission area.
  • the second transmission area 1021b is located between the first reflection area 1022a and the second reflection area 1022b, and the second transmission area 1021b can allow the first laser S1 and the second laser S1 and the second transmission area 1022b.
  • One of the two laser beams S2 passes through and directs the laser beam to the fluorescent wheel 103.
  • the first reflection area 1022a and the second reflection area 1022b are not located in the optical path of the first laser S1 and the second laser S2, and will not block the two excitation lights.
  • the first fluorescent light E1 and the second fluorescent light E2 are almost simultaneously excited and reflected by the fluorescent wheel 103, and the beam angle is collimated by the condenser lens group 105, the first fluorescent light E1 and the second fluorescent light E2 are almost Simultaneously, it is incident on the reflective surfaces of the first reflective area 1022a and the second reflective area 1022b respectively, and is reflected by the two reflective components. In this example, both reflect toward the light exit of the light source assembly.
  • the emitted third laser beam S3 can be transmitted through the interval between the first reflection area 1022a and the second reflection area 1022b, that is, the second transmission area 1021b, which is directly directed toward the light outlet of the light source assembly direction.
  • the two beams of light are reflected by the reflection area of the fluorescent wheel and pass through the converging lens group again. It is emitted to two different reflecting parts, and then reflected by the different reflecting parts to the direction of the light outlet of the light source assembly.
  • the two lights When the two lights are directed to the fluorescent area, the two lights excite the fluorescent area to produce fluorescence in different directions. The fluorescence is reflected by the fluorescent wheel and then exits to different reflecting parts, and the different reflecting parts also reflect the fluorescent light to the outgoing light.
  • the direction of the opening, and the light beam of the second light-emitting assembly is transmitted through the above-mentioned light-combining lens (only part of the light-combining lens can be transmitted) and directly directed toward the light-outlet direction of the light source assembly, so that the first laser beam, the second laser beam, and the fluorescence ,
  • the third laser beam can be combined with a light combining lens.
  • using fewer optical lenses can achieve the combining of the excitation beam and the received laser beam, and at the same time, it also takes into account the combination or combination of lasers of other colors.
  • Combining light the light source structure is compact, which is conducive to the realization of the miniaturization of the light source assembly.
  • the fluorescent wheel 103 includes a fluorescent area 1031 and a reflective area 1032, wherein the fluorescent area 1031 and the reflective area 1032 are enclosed to form a closed loop shape, such as a ring shape; the fluorescent area 1031 and the reflective area 1032 can also be fan-shaped , Which can be enclosed to form a disc shape.
  • the fluorescent wheel does not include light-transmitting areas.
  • At least a green fluorescent material may be provided in the fluorescent area of the fluorescent wheel 103, and the fluorescent material may be fluorescent powder.
  • a yellow fluorescent material can also be arranged in the fluorescent area.
  • the fluorescent material of each color can emit fluorescence of the corresponding color under the excitation of the laser.
  • the fluorescence obtained by excitation may also be one type.
  • the fluorescent area of the fluorescent wheel 103 may emit green fluorescence under the action of the light emitted by the first light-emitting component, or may also include yellow fluorescence.
  • the fluorescent area in the fluorescent wheel 103 in the embodiment of the present application may include at least one sub-fluorescent area, and each sub-fluorescent area may include a fluorescent material of one color.
  • the fluorescent area includes a plurality of sub-fluorescence areas, the plurality of sub-fluorescence areas and the reflection area may be arranged in a circle.
  • the fluorescent region 1031 may include two sub-fluorescent regions G1 and G2.
  • the fluorescent wheel 103 can rotate about the rotation axis Z in the w direction or the opposite direction of the w direction.
  • the two sub-fluorescent regions may include a green fluorescent material and a red fluorescent material, or the two sub-fluorescent regions may include a green fluorescent material and a yellow fluorescent material, or the two sub-fluorescent regions may include a green fluorescent material and an orange fluorescent material, respectively .
  • the area ratios of the fluorescent regions and the reflective regions in Figure 3-1 or Figure 3-2 are only examples.
  • the area of each sub-fluorescence area and the reflection area in the fluorescent wheel may also be different, and the area of each sub-fluorescence area and the reflection area of the fluorescent wheel may be designed according to the color of the light emitted by it.
  • the laser light directed to the reflective area of the phosphor wheel is a blue laser;
  • the sub-fluorescent area G1 includes yellow fluorescent material, which can emit yellow light under the excitation of the blue laser;
  • the sub-fluorescent area G2 includes green fluorescent material, which can emit light in the blue The laser emits green light under excitation.
  • the number of sub-fluorescent regions can also be four, five or other numbers; the colors of the fluorescent light emitted by each sub-fluorescent region can be different, or there can be at least two fluorescent lights emitting the same color. Sub-fluorescent regions, the at least two sub-fluorescent regions may not be adjacent.
  • FIG. 2-1 a schematic diagram of the light path of fluorescence excitation is shown. It should be noted that as the fluorescent wheel rotates, different fluorescent materials will be used in sequence and repetitively according to the rotation sequence. The same as in Figure 2-1 The light path indicates that fluorescence is generated, and the fluorescence of different colors is also reflected, collimated, and finally reflected by the first reflection area 1022a and the second reflection area 1022b with reference to the path shown in FIG. 2-1. The excitation process of other fluorescence will not be repeated here, please refer to the foregoing description.
  • the fluorescent wheel can be prepared in various ways.
  • the fluorescent wheel 103 may have a reflective substrate, and the reflective area of the fluorescent wheel 103 may be a part of the reflective substrate.
  • the fluorescent wheel has a metal substrate, such as an aluminum substrate, and the aluminum substrate has a side facing the light incident. Mirror surface.
  • the fluorescent area of the fluorescent wheel 103 may be located on a reflective substrate, and the surface of the reflective substrate is a light-reflecting surface.
  • a fluorescent material can be coated at a fixed position on the reflective substrate to form the fluorescent area of the fluorescent wheel, and the area of the reflective substrate that is not coated with fluorescent material forms the reflective area of the fluorescent wheel.
  • the reflective substrate may have a circular shape or a ring shape, or may also have other shapes, such as a rectangle or a hexagon.
  • the fluorescent area and the reflective area can be enclosed in a ring shape by designing the coating area of the fluorescent material.
  • the substrate of the fluorescent wheel may not be a reflective substrate.
  • a reflective film layer may be provided on the ceramic substrate.
  • the reflective area of the fluorescent wheel includes a reflective coating.
  • a fluorescent material and a reflective coating can be coated on the ring structure with poor light reflection effect to obtain a fluorescent wheel.
  • the area coated with the fluorescent material forms the fluorescent area of the fluorescent wheel
  • the area coated with the reflective coating forms the reflective area of the fluorescent wheel.
  • the first laser S1 and the second laser S2 are both emitted by the first light-emitting assembly 1011, and the first laser S1 and the second laser S2 are two separate and non-overlapping beams.
  • the first laser S1 and the second laser S2 emitted by the first light-emitting assembly 1011 may be two independent beams, or the first laser S1 and the second laser S2 may also be two of the same beam of light. Partial light is not limited in the embodiment of this application.
  • the first light-emitting component 1011 can emit not only two beams of light, but also three beams, four beams, or more. The embodiment of the present application does not limit the number of light beams emitted by the first light-emitting component. .
  • the first laser beam and the second laser beam described in the embodiments of the present application can be any two of the multiple lights emitted by the first light-emitting assembly, and it can be any case where the first light-emitting assembly emits other multiple lights. With reference to the introduction of the first laser beam and the second laser beam, the details are not repeated in the embodiment of the present application.
  • the light combining lens 102 is arranged obliquely to the wheel surface of the fluorescent wheel 103 and includes at least one transmission area.
  • the light combining lens 102 includes two transmission areas, and the first transmission area is located at the light combining lens 102 away from the fluorescent wheel.
  • the first reflection area is located at the end of the light combining lens 102 close to the fluorescent wheel 103, and the second transmission area and the second reflection area are located between the first reflection area and the first transmission area.
  • the laser beam transmitted through the first transmission zone is irradiated on the phosphor wheel, it is either reflected by the rotation of the wheel, or excited by the phosphor wheel to produce fluorescence, and all of them can be reflected by the phosphor wheel and then enter the first
  • the reflection area and the laser beam transmitted through the second transmission area are irradiated on the fluorescent wheel. The same is true for either being reflected or exciting the fluorescent wheel to generate fluorescence. Both can be reflected by the fluorescent wheel and then incident to the second reflection area.
  • the first laser beam S1 and the second laser beam S2 respectively transmit through different transmission areas of the light combining lens 102 (such as the first transmission area 1021a and the second transmission area 1021b), and the first The laser beam S1 and the second laser beam S2 are both condensed by the condenser lens group 105 and then incident on the fluorescent wheel 103. That is, the first laser beam S1 and the second laser beam S2 are directed to the converging lens group 105 through different transmission regions of the light combining lens 102, and then converged by the converging lens group 105 and then incident to the fluorescent wheel 103.
  • the fluorescent wheel 103 With the rotation of the fluorescent wheel 103, when the fluorescent area receives the irradiation of the first laser S1 and the second laser S2, the fluorescence generated by the excitation of the fluorescent area is reflected by the fluorescent wheel 103 and transmitted through the convergent lens group 105; the light combining lens 102 It also includes a plurality of reflection areas (such as the first reflection area 1022a and the second reflection area 1022b).
  • the fluorescent light transmitted by the condenser lens group 105 is incident on different reflection areas of the light combining lens 102.
  • the different reflection areas of the light combining lens 102 will be The fluorescence is reflected toward the light exit.
  • the first laser beam and the second laser beam are the excitation beams of fluorescence, and the fluorescence emitted by the excitation of the fluorescence region can be called the laser beam.
  • the light exit direction of the light source assembly 10 (the x direction in Figure 2-1) may be perpendicular to the arrangement direction of the light combining lens 102, the converging lens group 105 and the fluorescent wheel 103 (that is, the y direction) .
  • the reflection area of the fluorescent 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 fluorescent wheel 103 and again transmitted through the convergent lens group 105 Then, it is incident on 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 exit direction.
  • the first laser beam S1 is reflected by the reflection area of the fluorescent wheel 103 and again transmitted through the condenser lens group 105, and then enters the first reflection area 1022a of the light combining lens 102;
  • the second laser beam S2 is The reflection area of the fluorescent wheel 103 is reflected and transmitted through the converging lens group 105 again, and then enters the second reflection area 1022 b of the light combining lens 102.
  • the transmission area or the reflection area of the light combining lens 102 is arranged at intervals.
  • the transmission area and the reflection area of the light combining lens 102 may be alternately arranged.
  • the transmissive area in the light combining lens 102 can transmit the light emitted by the first light-emitting component 1011 (such as the first laser beam and the second laser beam), and the reflective area in the light combining lens 102 can transmit the incident light (fluorescence, first laser beam). Both the laser beam and the second laser beam are reflected to the light exit of the light source assembly 10.
  • the first light-emitting component 1011 such as the first laser beam and the second laser beam
  • the reflective area in the light combining lens 102 can transmit the incident light (fluorescence, first laser beam). Both the laser beam and the second laser beam are reflected to the light exit of the light source assembly 10.
  • the condensing lens group 105 converges the two beams to the front of the fluorescent wheel 103 to form a smaller excitation spot.
  • the reflection area of the fluorescent wheel 103 receives the irradiation of the first laser S1 and the second laser S2, the first laser S1 and the second laser S2 can be reflected by the reflection area of the fluorescent wheel 103, and again transmit through the condenser lens
  • the group 105 is incident on the first reflection area 1022a and the second reflection area 1022b of the light combining lens 102.
  • the first laser beam S1 and the second laser beam S1 are incident on the connecting line of the mirror position on the converging lens group 105 and the converging position on the fluorescent wheel, respectively, and the optical axis h of the converging lens group 105 The included angles are different.
  • neither the first laser beam S1 nor the second laser beam S2 passes through the optical axis of the converging lens group 105, and the two laser beams are not symmetrical about the optical axis h of the converging lens group 105.
  • the line connecting the location of the first laser beam in the converging lens group and the converging position of the first laser beam on the phosphor wheel is the first line, and the angle between the first line and the optical axis of the converging lens group is The first included angle; the line connecting the position of the second laser beam in the converging lens group and the converging position of the second laser beam on the phosphor wheel is the second line, and the second line is connected to the light of the reducing lens group
  • the included angle of the shaft is the second included angle; the first included angle is different from the second included angle.
  • the first angle formed by the first laser beam S1 and the optical axis h of the converging lens group 102 is an angle ⁇
  • the second laser beam S2 is formed by the optical axis h of the converging lens group 102.
  • the second included angle is the angle ⁇ , ⁇ > ⁇ .
  • the first laser beam and the second laser beam can be incident on the mirror surface of the converging lens group at different incident angles, for example, the convex surface of the first lens of the converging lens group, but according to the reflection principle, the first laser beam and the second beam
  • the respective reflected light paths of the laser beams will not overlap, so that the first laser beam and the second laser beam reflected by the fluorescent wheel reflection area can be incident on the first reflection area 1022a and the second reflection area 1022b respectively along different reflection light paths, and be
  • the above-mentioned two reflective components reflect, for example, emit toward the direction of the light outlet of the light source assembly.
  • the first lens of the above-mentioned converging lens group refers to the lens in the converging lens group that first receives the incident laser light.
  • the first One of the laser beam and the second laser beam can also pass through the second transmission area between the first reflection area and the second reflection area of the light combining lens, while the other is reflected from the first reflection area or the second reflection area.
  • the side of the area away from the second transmission area transmits through, for example, it can be regarded as transmitted from the outside of one of the two reflection areas.
  • the path of the first laser beam and the second laser beam incident on the fluorescent wheel further includes a beam-reducing lens group 106, which is located in the first light-emitting component 1011 and the first reflective area 1022a, Between the two reflective areas 1022b, it is used to reduce the light spots of the first laser beam and the second laser beam emitted from the first light-emitting component.
  • the beam-reducing lens group 106 can make the beam of the emitted laser light smaller than the beam of the incident laser light, so that it is convenient to pass through the lens in the rear optical path.
  • the beam-reducing lens group 106 may be a telescope lens group, and the beam-reducing lens group 106 may include a convex lens 1061 and a concave lens 1062.
  • the optical axis of the beam-reducing lens group 106 and the optical axis of the converging lens group 105 may be collinear or coincident.
  • the first laser beam and the second laser beam are incident on the beam-reducing lens group 106 at different mirror positions, and neither the first laser beam nor the second laser beam passes through the optical axis of the beam-reducing lens group 106.
  • the position of the mirror surface of the first laser beam and the second laser beam incident on the beam reducing lens group 106 may not be symmetrical with respect to the optical axis of the beam reducing lens group 106.
  • the first laser beam and the second laser beam are incident on the condenser lens group 105 with different mirror positions, since the beam reduction lens group and the condenser lens group are coaxial, although the laser beam has the effect of reducing the spot area,
  • the first laser beam and the second laser beam before the beam are incident on the beam reducing lens group 106, they are also incident on different positions of the mirror surface of the beam reducing lens group 106.
  • the optical axis is symmetrical.
  • FIG. 4-1 shows a schematic diagram of the light path of another light source assembly provided in the present application.
  • the difference from the schematic diagrams of the light source assembly in Figs. 1-1, 2-1, and 2-2 is that in Fig. 4-1, the light-emitting surface of the first light-emitting assembly 1011 is perpendicular to the wheel surface of the fluorescent wheel 103, rather than facing each other. parallel.
  • a turning lens 108 is also provided along the direction of the light-emitting surface of the first light-emitting assembly 1011 for reflecting the light beam emitted by the first light-emitting assembly toward the wheel surface direction of the fluorescent wheel 103.
  • the first light-emitting component 1011 may be an MCL laser 1011, and the light-emitting surface of the laser 1011 may be perpendicular to the wheel surface or the light-receiving surface of the fluorescent wheel 103.
  • the light source assembly 10 may further include a plurality of turning lenses 108, which may be arranged along the light output direction of the laser 1011, and the plurality of turning lenses 108 are used to reflect the light beams emitted by the laser 10 to form multiple light beams.
  • the distances between the multiple turning lenses 108 and the light-emitting surface of the laser 1011 may all be different.
  • the plurality of turning lenses 108 may include two turning lenses, and the two turning lenses are respectively used to reflect different parts of the light beam emitted by the laser 1011 to form the first laser beam S1 and the second laser beam S1.
  • There is a laser beam S2 There is a laser beam S2, and there is a gap between the first laser beam S1 and the second laser beam S2.
  • the distance between each turning lens and the light exit surface of the laser may include: the distance between any point on the surface of the turning lens close to the laser and the light exit surface.
  • the plurality of turning lenses may satisfy: in any two turning lenses, at least part of the orthographic projection of one turning lens on the light-emitting surface of the laser is located outside the orthographic projection of the other turning lens on the light-emitting surface of the laser;
  • the minimum distance between a point in the lens and the laser may be greater than the maximum distance between a point in the other turning lens and the laser. Therefore, the distance between any point on the surface of each turning lens close to the laser and the laser is different from the distance between all points on the surface of the other turning lens close to the laser and the laser.
  • each surface of the turning lens may be a reflective surface, or in the turning lens, only the surface facing the laser 1011 may be a reflective surface.
  • the number of turning lenses in the embodiment of the present application can be an integer greater than or equal to 1.
  • Figure 4-1 takes the light source assembly 10 including two turning lenses as an example for illustration. In a specific implementation, the number of turning lenses is also It can be one, three, four or more.
  • the turning lens can be used to adjust the transmission direction of the laser light emitted by the laser.
  • the multiple turning lenses can be used to split the laser beams emitted by the lasers, and the distance between the laser beams obtained by the splitting can also be adjusted by adjusting the positions of the turning lenses.
  • the laser 1011 can emit at least two laser beams, and the at least two laser beams can be directed to two turning lenses 108, and each turning lens 108 can reflect the one beam respectively. Part of the laser light directed to the turning lens 108, and the two turning lenses 108 can divide the laser beam into a first laser beam S1 and a second laser beam S2.
  • the laser 1011 can also emit multiple laser beams, such as four or more beams. These multiple laser beams can be directed to two turning mirrors 108 respectively, and each turning mirror 108 reflects and outputs a laser beam.
  • Fig. 4-2 is another embodiment of the light source assembly provided on the basis of the example of Fig. 4-1.
  • the laser 1011 can emit two beams of light, and through the turning action of the turning lens 108, two laser beams directed to the beam reduction lens group 106 are formed. Neither the first laser beam nor the second laser beam passes through the optical axis of the beam-reducing lens group 6, and after the beam-shrinking lens group 106, the beams of the first laser beam and the second laser beam are both narrowed and avoiding the first beam.
  • a reflection area 1022a and a second reflection area 1022b are directed toward the convergent lens group 105. The optical axes of the condenser lens group 105 and the beam reduction lens group coincide.
  • the first laser beam and the second laser beam after the contraction are irradiated to different positions on the mirror surface of the condenser lens group, and enter the same spot position of the fluorescent wheel after being converged.
  • the fluorescent area of the fluorescent wheel 103 is excited or is reflected by the reflective area of the fluorescent wheel 103.
  • first laser beam and the second laser beam reflected by the fluorescent wheel or the first fluorescent light and the second fluorescent light reflected by the fluorescent wheel, they are directed to the first reflection area 1022a and the second reflection area 1022b in a sequential manner. And it is reflected by the two reflecting parts toward the light exit direction of the light source assembly to form a sequential illumination light beam.
  • the light source assembly 10 in the embodiment of the present application may further include: a third lens 107.
  • the first laser beam and the second laser beam are transmitted through the reduction lens group 105 and pass through the third lens 107 before entering the phosphor wheel 103.
  • the third lens 107 may be a homogenizing lens, such as a diffuser.
  • the third lens 107 may be located between the reduction lens group 106 and the first reflection area 1022a and the second reflection area 1022b.
  • the laser beam emitted by the laser is reduced by the beam reduction lens group 106 and then exits to the third lens 107.
  • the third lens 107 can homogenize the two different laser beams and then exit.
  • the excitation beam with homogenized energy density includes: It is beneficial to improve the conversion efficiency of fluorescence excitation.
  • the third lens may also be a fly-eye lens.
  • the projection device in the related art usually produces a speckle effect when performing projection display.
  • Speckle effect means that after two laser beams emitted by a coherent light source are scattered after irradiating a rough object (such as the screen of a projection device), the two laser beams will interfere in space, and finally granular light and dark appear on the screen. The effect of alternate spots.
  • the speckle effect makes the display effect of the projected image poor, and the light and dark unfocused spots appear to be in a flickering state to the human eye, which is prone to dizziness when viewed for a long time, and the user's viewing experience is poor.
  • the laser light emitted by the first light-emitting component can be made more uniform under the action of the diffuser or the fly-eye lens, and the interference caused by the use of these lasers for projection is weak, which can weaken the projection device when the projection device is performing projection display.
  • the speckle effect can prevent the projected image from becoming blurred, improve the display effect of the projected image, and avoid the dizziness caused by human eyes.
  • a diffuser 109 may be further provided in the path where the second light-emitting component 1012 is incident on the light combining lens 102.
  • the diffusion member 109 may specifically be a diffusion sheet, a fixed diffusion sheet, or a moving diffusion sheet, such as vibration or rotation. After passing through the diffuser 109, the homogenization degree of the red laser will be improved, which is beneficial to reduce the speckle effect of the red laser.
  • any position of the light combining lens 102 can transmit the light emitted by the second light-emitting component 1012 (such as the third light), and the transmission area in the light combining lens 102 can transmit the light emitted by the first light-emitting component 1011 (such as The first light and the second light), the reflection area in the light combining lens 102 can reflect the incident light (fluorescence, the first light or the second light) to the light outlet of the light source assembly 10 (such as convergent light). Where the lens 104 is located).
  • the center of the light spot formed by the light from the light combining lens 102 to the condensing lens 104 may pass through the optical axis of the condensing lens 104 or may not pass through the optical axis of the condensing lens 104, which is not limited in the embodiment of the present application. .
  • the reflection area of the fluorescent wheel 103 can separate the first light and the second light. It is reflected to different reflection areas in the light combining lens 102, and the different reflection areas in the light combining lens 102 can reflect the first light and the second light to the light exit.
  • the fluorescent area can emit fluorescence under the excitation of the first light and the second light, and the fluorescent light It is emitted to the reflection area in the light combining lens 102, and then the reflection area in the light combining lens 102 can reflect the fluorescence to the light exit port.
  • the first light and the second light emitted by the first light-emitting assembly 1011 respectively pass through the first transmission area 1021a and the second transmission area 1021b of the light combining lens 102, and then are directed toward
  • the situation of the reflection area of the fluorescent wheel 103 illustrates the transmission process of light.
  • the light reflected by the reflection area of the fluorescent wheel 103 can only be directed to the reflection area in the light combining lens 102, for example, the first light beam is directed to the first reflection area 1022a, and the second light beam is directed to the second reflection area. 1022b.
  • the fluorescence emitted by the fluorescent area can be directed to the reflection area of the light combining lens 102 or to the combining lens.
  • the transmission area of the optical lens 102 the light transmission process in this case is not illustrated in the embodiment of the present application.
  • the transmission area in the light combining lens 102 only needs to ensure that it can transmit the laser light emitted by the first light emitting component 1011 and the laser light emitted by the second light emitting component 1012, and reflect the fluorescence emitted by the fluorescent area of the fluorescent wheel.
  • the reflection area in the light combining lens 102 only needs to ensure that it can transmit the laser light emitted by the second light emitting component 1012, and reflect the laser light emitted by the first light emitting component 1011 and the fluorescence emitted by the fluorescent area of the fluorescent wheel.
  • the embodiment of the present application does not limit the color of the laser light emitted by the first light-emitting component and the second light-emitting component, and whether the light different from the fluorescence can pass through the transmission area or the reflection area of the light combining lens 102.
  • the transmissive area in the light combining lens 102 can reflect a color different from the laser light emitted by the first and second light-emitting components, and the reflective area in the light combining lens 102 can reflect a color different from the second light emitting component. The light of the laser.
  • the colors of the laser light emitted by the first light-emitting component, the laser light emitted by the second light-emitting component, and the fluorescence emitted by the fluorescent area may all be different.
  • the first light-emitting component can emit a blue laser, that is, the first light and the second light are both blue lasers;
  • the second light-emitting component can emit a red laser, that is, the third light is a red laser;
  • the fluorescent area emits green fluorescence And at least one of yellow fluorescence.
  • the laser light emitted by the first light-emitting component, the laser light emitted by the second light-emitting component, and the fluorescence emitted by the fluorescent region may also be in other colors, which are not limited in the embodiment of the present application.
  • the first laser beam and the second laser beam emitted by the first light-emitting assembly are both used as excitation light and directed to different positions on the mirror surface of the converging lens group.
  • the optical axis of is symmetrical, which can excite the fluorescent wheel to produce the first fluorescence and the second fluorescence with different emission directions.
  • the laser beam is a high-energy beam
  • it if it is desired to increase the energy density of a single laser beam to increase the luminous power of the fluorescence, it will not only bring unreliability and higher heat resistance requirements to the optical lens in the optical path, resulting in the cost of the optical path architecture.
  • the high-energy-density light beam will cause heat dissipation problems to the fluorescent wheel, which will reduce the fluorescent conversion efficiency.
  • the laser excitation beam is set to two beams.
  • the two different beams are irradiated to different positions of the lens, which can reduce the long-term exposure of the lens by the high-energy beam.
  • the direction of incident on the fluorescent wheel is also different.
  • the two laser beams are reflected and pass through the collimating lens group again Then, the laser beams are emitted according to the law of reflection, so that the two laser beams are incident on different reflective parts and are reflected by different reflective parts.
  • the two lasers are irradiated to different positions of the condensing lens group, and then incident on the fluorescent wheel in different directions.
  • the two lasers excite the fluorescent area to produce two fluorescent lights.
  • the two fluorescent lights are reflected by the fluorescent wheel, they are also directed to different reflective parts through the convergent lens group.
  • the reflective component can reflect the two laser beams and the fluorescent beam in the same direction in a time-sharing manner to complete the light combination.
  • the light source assembly can output the blue laser beam and the fluorescent beam in a sequential manner.
  • a third laser beam can be emitted when the first light-emitting component is not lit, and the third laser beam is emitted at least through the interval between the first reflection area and the second reflection area of the light combining lens. , It is directly directed toward the light exit direction of the light source assembly, so that it can form the three-primary or four-primary color output of the light source together with the aforementioned blue laser beam and fluorescent beam.
  • the first reflecting area and the second reflecting area are used as light-combining parts.
  • the first light-emitting assembly, the second light-emitting assembly and the fluorescent wheel are arranged in three directions, and the remaining one direction is the light source assembly. Light exit, in this way, the light beams emitted by the first light-emitting assembly, the second light-emitting assembly, and the fluorescent wheel share the first reflection area and the second reflection area of the light combining lens as light combining parts, with few light combining parts and compact light source structure layout .
  • the first reflection area and the second reflection area not only serve as the guide parts for the first and second laser beams emitted by the first light-emitting assembly to enter the fluorescent wheel, but also as the first and second laser beams.
  • the light receiving part reflected by the fluorescent wheel is combined with light in the same direction. Therefore, the first reflection area and the second reflection area are also multiplexed during the fluorescence excitation process.
  • the distance between the turning lens and the light-emitting surface is adjusted to adjust the distance between the first laser beam and the second laser beam, thereby changing the incidence of the two laser beams on the mirror surface of the optical lens.
  • the upper position realizes the asymmetrical setting of the two laser beams relative to the optical axis of the lens.
  • the two excitation light paths do not overlap, and the utilization rate of the lens area is improved, which can increase the excitation power without increasing the local tolerance requirements of the optical lens.
  • the fluorescent wheel is provided with a laser reflection area.
  • the light source assembly in the present application has fewer optical components and a compact optical path structure. , While achieving higher luminous power, it can also take into account the miniaturization of the light source assembly.
  • a light-collecting component may be further provided in the direction of the light exit of the light source assembly 10, or a condensing lens 104 and a light-collecting component may be arranged in sequence to complete the second combined light lens.
  • the fluorescent light and laser beams reflected in the first reflection area and the second reflection area are collected as the output of the light source assembly.
  • both the first light-emitting component and the second light-emitting component may use MCL lasers, including multiple light-emitting chips.
  • Figure 9-1 and Figure 9-2 show two different arrays of MCL lasers.
  • the MCL laser includes multiple light-emitting chips arranged in an array, and light beams are emitted in the row or column direction.
  • Figure 9-1 shows an MCL laser with two rows and seven columns of light-emitting chips
  • Figure 9-2 shows an MCL laser with four rows and six columns of light-emitting chips.
  • the converging lens group 105 may include at least one convex lens, and the convex arc surface of each convex lens faces the light combining lens 102.
  • the convergent lens group 105 including two convex lenses as an example for illustration.
  • the convergent lens group 105 may also be a lens group formed by a hyperspherical lens and a plano-convex lens or a lens formed by a meniscus lens. Group.
  • the converging lens group 105 may also include one or three convex lenses.
  • the converging lens group 105 includes a plurality of convex lenses
  • the plurality of convex lenses may be arranged in sequence 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 converging lens group 105 includes a plurality of convex lenses to ensure that the laser light entering the converging lens group is more accurately focused on the fluorescent wheel 103.
  • the first transmission area 1021a is located at the end of the light combining lens 102 away from the fluorescent wheel 103
  • the first The reflection area 1022 a is located at one end of the light combining lens 102 close to the fluorescent wheel 103.
  • the second transmission area 1021b may be a transmission area through which the laser light transmitted to the reflection area in the fluorescent wheel 103 passes
  • the first transmission area 1021a may be a transmission area through which the laser light transmitted to the fluorescent area in the fluorescent wheel 103 passes.
  • the laser 1011 can emit laser light to the turning lens closer to the laser; After the upward reflection, it passes through the second transmission area 1021b and is directed toward the reflection area of the fluorescent wheel 103, and the reflection area of the fluorescent wheel 103 can reflect the laser light to the second reflection area 1022b.
  • the laser 1011 can emit laser light to the turning lens further away from the laser; the laser light may pass through the first transmission area after being reflected on the turning lens 1021a is directed toward the fluorescent area; under the excitation of the laser, the fluorescent area can emit fluorescence toward the first reflective area 1022a. Since the light path of the fluorescent light from the fluorescent wheel 103 to the first reflective area 1022a is short, the light spot formed by the fluorescent light on the first reflective area 1022a is smaller, and the light beam of the fluorescent light is thinner, and the first reflective area 1022a is easier to reflect all the fluorescent light. To the light outlet of the light source assembly.
  • the light combining lens 102 can be arranged obliquely to the traveling direction of the first laser beam and the second laser beam emitted by the first light-emitting assembly, that is, there is an angle between the light combining lens 102 and the traveling direction.
  • the light combining lens 102 can be inclined toward the light outlet. Or, the light combining lens 102 is inclined at 45 degrees with respect to the wheel surface of the fluorescent wheel 103.
  • the number of transmission areas and reflection areas in the light combining lens 102 may be greater than or equal to the number of light beams emitted by the first light-emitting component.
  • the first light emitting component 1011 emits two beams of light
  • the light combining lens 102 includes two transmission areas and two reflection areas as an example.
  • the number of transmission areas and reflection areas in the light combining lens 102 may also be three, four or more, which is not limited in the embodiment of the present application.
  • the light combining lens may include other areas in addition to the multiple transmission areas and the multiple reflection areas, and no light may be directed to the other areas.
  • the light combining lens 102 includes a first transmission area 1021a, a second transmission area 1021b, a first reflection area 1022a, and a second reflection area 1022b.
  • the transmission area and reflection area of the light combining lens 102 can be alternately arranged along the second direction (the x direction in Figure 5-1), such as the first reflection area 1022a, the second transmission area 1021b, the second reflection area 1022b, and the first reflection area 1022a, the second transmission area 1021b, and the second reflection area 1022b.
  • a transmissive area 1021a may be sequentially arranged along the second direction.
  • the light combining lens 102 is inclined toward the light outlet, such as 45 degrees, so the first transmission area 1021a can be located away from the converging lens group 105, and the first reflection area 1022a can be located close to the converging lens group 105. It should be noted that the light combining lens 102 is inclined at 45 degrees, that is, the angle between the light combining lens 102 and the traveling direction of the laser light emitted by the first light-emitting assembly is 45 degrees. The included angle may also be other angles, which is not limited in the embodiment of the present application.
  • each transmission area in the light combining lens 102 can correspond to a reflection area. If the light transmitted from a certain transmission area is reflected in the reflection area of the fluorescent wheel, it can be reflected by the reflection area of the fluorescent wheel. The back shot is directed 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 on the fluorescent area of the fluorescent wheel, the excited fluorescence will be reflected by the fluorescent wheel and at least be directed toward the reflection area corresponding to the transmission area in the light combining lens. For example, please continue to refer to FIG. 6, the first transmission area 1021a in the light combining lens 102 corresponds to the first reflection area 1022a, and the second transmission area 1021b corresponds to the second reflection area 1022b.
  • the distance between the first transmission area 1021a and the first light-emitting component 1011 may be smaller than the distance between the second transmission area 1021b and the first light-emitting component 1011, and the laser light (such as the first laser beam S1) is transmitted from the first light-emitting component 1011 to the first light-emitting component 1011.
  • the optical path of the area 1021a is shorter than the optical path of the laser (such as the second laser S2) from the first light-emitting component 1011 to the second transmission area 1021b; the distance between the first reflection area 1022a and the fluorescent wheel 103 is smaller than the second reflection area 1022b.
  • the distance from the fluorescent wheel 103, the optical path of the light (such as the first laser S1 or fluorescent light) from the fluorescent wheel 103 to the first reflection area 1022b is shorter than that of the light (such as the second laser S2 or fluorescent light) from the fluorescent wheel 103 to The optical path of the first reflective area 1022a.
  • the first transmission area 1021a only needs a small area to complete the transmission of the incident laser
  • the first reflection area 1022a only needs a small area to complete the reflection of the incident light
  • the first transmission The area of the area 1021a may be smaller than the area of the second transmission area 1021b
  • the area of the first reflection area 1022a may be smaller than the area of the second reflection area 1022b.
  • the functions of the reflection zone and the transmission zone in the light combining lens 102 can be realized in the following manner.
  • the reflection area of the light combining lens 102 may have a coating.
  • the coating film may be a full-wavelength reflective film, or the coating film is a reflective film for at least one of the red, green, and blue wavelength bands.
  • the coating may be located on the side of the light combining lens 102 close to the converging lens group 105, or on the side of the light combining lens 102 away from the converging lens group 105, which is not limited in the embodiment of the present application.
  • the light combining lens 102 is close to the condensing lens group 105, and at least the surface of the transmission area is provided with a dichroic film.
  • the dichroic film can be used to transmit blue light and reflect at least one of red light, yellow light and green light.
  • the fluorescent light emitted from the fluorescent area of the fluorescent wheel toward the light combining lens 102 includes red light.
  • the dichroic film provided on the surface of the transmission area of the light combining lens 102 even if the fluorescent light is directed to the transmission area, it will be The dichroic film is reflected and then directed toward the light outlet of the light source assembly, which improves the utilization rate of fluorescence.
  • the reflective area of the light combining lens 102 can also be directly made of reflective material.
  • the transmissive area in the light combining lens 102 can also be directly prepared from a dichroic material, which is used to transmit blue light and reflect at least one of red light, yellow light, and green light. . At this time, the plating film and the dichroic film can no longer be provided.
  • an anti-reflection coating is provided on the side of the light combining lens 102 far away from the converging lens group 105; or, the transmission area of the side of the light combining lens 102 away from the converging lens group 105 is provided with an anti-reflection coating.
  • the antireflection coating increases the transmittance for the light of the full spectrum, or it may only increase the transmittance for the laser light (such as the blue laser) emitted by the first light-emitting component, which is not limited in the embodiment of the present application.
  • the number of turning lenses 108 in the light source assembly can be the same as the number of transmission regions in the light combining lens, and each turning point in the light source assembly
  • the lens can correspond one-to-one with each transmission zone in the combining lens.
  • Each turning lens can reflect the incident laser light to the corresponding transmission area.
  • the turning lens near the laser corresponds to the first transmission area 1021a in the light combining lens 102.
  • the turning lens reflects the incident laser light to the first transmission. District 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 light to the second transmission area 1021b.
  • the position of the corresponding turning lens can be designed according to the position of each transmission area in the light combining lens, so as to ensure that each turning lens reflects the incident laser light to the corresponding transmission area.
  • the light-receiving surface of the light combining lens 102 may have a light diffusing structure, and the second light-emitting component 1012 and the first light-emitting component 1011 may both be used to emit laser light to the light-receiving surface.
  • the light-receiving surface may be the surface of the light combining lens 102 facing the second light-emitting component 1012 and the first light-emitting component 1011, that is, the surface away from the condensing lens 104.
  • the light diffusion structure may include a plurality of parallel strip-shaped protrusions or granular convex-concave structures.
  • the homogenizing lens 107 and the diffusing member 109 shown in FIG. 4-2 may be omitted, or only one of the two may be omitted.
  • the excitation beam since the laser light will be lost when passing through the dichroic mirror, and in the related art, the excitation beam needs to pass through the dichroic mirror twice when it is directed to the light exit, so the loss of the excitation beam is relatively high. In the embodiment of the present application, the excitation light beam only needs to pass through the light combining lens once to be emitted to the light outlet, so the loss of the excitation light beam is reduced.
  • the functions of the reflection zone and the transmission zone in the light combining lens 102 can be realized in the following manner.
  • the reflection area of the light combining lens 102 may have a coating.
  • the coating film may be a reflective film for at least one of the green light waveband and the blue light waveband.
  • the coating may be located on the side of the light combining lens 102 close to the converging lens group 105, or on the side of the light combining lens 102 away from the converging lens group 105, which is not limited in the embodiment of the present application.
  • the light combining lens 102 is close to the condensing lens group 105, and at least the surface of the transmission area is provided with a dichroic film.
  • the dichroic film can be used to transmit blue light and red light, and reflect at least one of yellow light and green light.
  • the fluorescent light emitted from the fluorescent area of the fluorescent wheel toward the light combining lens 102 includes green light.
  • the dichroic film is reflected and then directed toward the light outlet of the light source assembly, which improves the utilization rate of fluorescence.
  • the coating film and the dichroic film may be disposed on a light-transmitting substrate to form the light combining lens.
  • the transmission zone and the reflection zone in the light combining lens 102 can also be directly made of dichroic materials.
  • the material in the transmission zone is used to transmit blue and red light and reflect yellow light.
  • at least one of green light, and the material of the reflection area is used to transmit red light and reflect at least one of blue light, green light and yellow light.
  • an anti-reflection coating is provided on the side of the light combining lens 102 far away from the converging lens group 105; or, the transmission area of the side of the light combining lens 102 away from the converging lens group 105 is provided with an anti-reflection coating.
  • the antireflection coating increases the transmittance for the full spectrum of light, or it may only increase the transmittance for the laser light (such as the blue laser) emitted by the light-emitting component, which is not limited in the embodiment of the present application.
  • the wavelength bands of the first light and the second light emitted by the first light-emitting assembly 1011 may overlap, and the wavelength bands of the light emitted by the first light-emitting assembly 1011 and the light emitted by the second light-emitting assembly 1012 (that is, The wavelength bands of the third light) do not overlap.
  • both the first beam of light and the second beam of light may be blue light.
  • the wavelength band of the first light and the second light may both be 460 nanometers to 480 nanometers; alternatively, the wavelength of the first light may be 450 nanometers to 470 nanometers, and the wavelength of the second light may be 460 nanometers to 460 nanometers.
  • the wavelength bands of the first beam and the second beam may also be other wavelength bands, which are not limited in the embodiment of the present application.
  • the third beam of light may be red light, and the wavelength band of the third beam may be 610 nanometers to 700 nanometers, or 660 nanometers to 690 nanometers, or other wavelength bands, which are not limited in the embodiment of the present application.
  • the dominant wavelengths of the first light and the second light are different.
  • the first light and the second light may be blue light with different main wavelengths.
  • a beam of light is obtained by the combination of light of multiple wavelengths in a wavelength band, and the beam of light that the human eye feels is the result of the combined effect of the light of each wavelength.
  • the human eye feels that the beam of light corresponds to A single wavelength of light, the wavelength is the dominant wavelength of the beam.
  • both the first light-emitting component and the second light-emitting component may be a multi-chip laser diode (MCL) type laser, and the MCL type laser may include arrays arranged in the same package. Multiple light-emitting chips, each light-emitting chip can emit laser light independently.
  • the first light and the second light in the embodiment of the present application may originate from the same first light-emitting component, and the first light and the second light are respectively emitted from different light-emitting areas of the laser, such as the first light The light and the second light can be respectively emitted by different light-emitting chips in the laser.
  • the first light and the second light may also originate from different first light-emitting components, which is not limited in the embodiment of the present application.
  • the laser can simultaneously emit laser light to multiple turning mirrors.
  • the laser may include multiple light-emitting chips, and the multiple light-emitting chips can emit light at the same time, so as to realize that the laser simultaneously emits laser light to multiple turning mirrors.
  • the laser beam emitted by the laser is thicker and the brightness of the laser is higher.
  • the condensing lens can use higher-brightness light for the projection of the projection device, thereby ensuring that the brightness of the image obtained by the projection by the projection device is higher, and the projection effect of the projection device is better.
  • the laser can emit laser light to different turning lenses at different times.
  • the laser includes a plurality of light-emitting chips, and each light-emitting chip corresponds to a turning lens, and each light-emitting chip can emit light to the corresponding turning lens.
  • the light-emitting chips that emit light in the laser at different times are different, so that the laser can emit laser light to different turning lenses at different times.
  • the beam of the emitted laser is relatively thin.
  • the laser passes through the turning lens, the transmission area in the light combining lens, the fluorescent wheel and the reflection area in the light combining lens.
  • the beam is also thinner when it hits the condensing lens. In this way, it can be ensured that the laser beam can easily be completely injected into the converging lens, avoiding the waste of laser light, and improving the ease of condensing light by the converging lens.
  • the light-emitting chip in the laser does not need to continuously emit light, so pulsed current can be used to supply power to the light-emitting chip, and the energy of the pulsed current is higher, so the laser light-emitting chip can emit laser with higher brightness.
  • the light-emitting chip in the laser does not need to continuously emit light, which can increase the service life of the light-emitting chip in the laser.
  • the laser can emit laser light to different turning lenses according to the switching timing between the fluorescent area and the reflective area in the fluorescent wheel, so that the laser light reflected by the different turning lenses passes through the corresponding transmission area and is directed to different areas of the fluorescent wheel (such as Fluorescent area and reflective area).
  • the timing of the laser emitting light to each turning lens may also be independent of the switching timing of the fluorescent area and the reflective area in the fluorescent wheel, which is not limited in the embodiment of the present application.
  • the technical solution of the present application also provides a laser projection device, as shown in a schematic diagram of an ultra-short throw laser projection device as shown in FIG. , Can realize large-scale projection display with a smaller projection ratio.
  • FIG. 7 shows a schematic diagram of a projection light path of a laser projection device. As shown in FIG. 7, the light beam output by the light source assembly 100 enters the optical engine 200, and the optical engine 200 then enters the light beam into the lens 300.
  • the light source assembly 100 also includes a plurality of optical lenses, which combine and converge the laser beam and the fluorescent beam.
  • the light beam emitted from the light source assembly 100 is incident on the optical engine 200, and a homogenization component, such as a light pipe located at the front end of the optical engine 200, is used to receive the illumination beam of the light source, and has the function of light mixing and homogenization, and the exit of the light pipe It is rectangular and has a shaping effect on the light spot.
  • the optical machine 200 also includes a multi-piece lens group.
  • the TIR or RTIR prism is used to form an illuminating light path, and the light beam is incident to the core key component-a light valve.
  • the light valve modulates the light beam and enters the lens group of the lens 300 for imaging.
  • the light valve can include many types, such as LCOS, LCD, or DMD.
  • a DLP (Digital Light Processing) projection architecture is applied, and the light valve is a DMD chip or a digital micro-mirror array.
  • the light valve Before the light beam of the light source 100 reaches the light valve DMD, it will also undergo shaping of the light path of the light-mechanical illumination, so that the illuminating light beam conforms to the illumination size and incident angle required by the DMD.
  • the surface of the DMD includes thousands of tiny mirrors, each of which can be driven individually for deflection. For example, in the DMD chip provided by TI, it can be deflected by plus or minus 12 degrees or plus or minus 17 degrees.
  • the light reflected by a positive deflection angle is called ON light
  • the light reflected by a negative deflection angle is called OFF light.
  • OFF light is invalid light, which is usually hit on the housing or absorbed by a light-absorbing device.
  • the ON light is an effective light beam that is irradiated by the illuminating light beam by the tiny reflector 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 illuminating light beam emitted by the light source assembly 100 directly affects the quality of the light beam irradiated on the surface of the light valve DMD, so that the image is projected by the lens 300 and then reflected on the projection screen.
  • the lens 300 is an ultra-short throw projection lens.
  • the light beam modulated by the light valve enters the lens and finally exits in an oblique upward direction. This is different from the traditional telephoto projection where the projection beam optical axis is located in the projection screen.
  • the vertical light emission method, the ultra-short throw projection lens usually has an offset of 120% to 150% relative to the projection screen.
  • This projection method has a smaller projection ratio (it can be understood as the distance between the projection host and the projection screen and the projection The ratio of the diagonal size of the screen), such as about 0.2 or even smaller, can make the projection device and the projection screen closer, which is suitable for home use, but this light emission method also determines the beam has a higher uniformity, otherwise Compared with the traditional telephoto projection, the brightness or chromaticity unevenness of the projection screen will be more obvious.
  • the light source 100 can output three primary colors in a sequential manner. According to the principle of three-color light mixing, the human eye cannot distinguish the color of light at a certain moment, and what it perceives is still mixed. White light.
  • the three-color primary color light in the light source 100 can be lighted and output white light at the same time.
  • the projection device uses the light source components in the above-mentioned multiple embodiments, and the blue light circuit is eliminated from the above light source components, and the output of at least three colors of light is realized with fewer optical lenses and a compact optical structure.
  • the other structure may include a heat dissipation structure or a circuit board.
  • a and/or B can mean: A alone exists, and both A and B exist at the same time. There are three cases of B.
  • the character "/" in this text generally indicates that the associated objects before and after are in an "or” relationship.
  • the term "at least one of A and B” in this application is merely an association relationship describing the associated objects, indicating that there can be three types of relationships. There are three cases of A and B, and B alone.
  • A, B and C means that there can be seven relationships, which can mean: A alone, B alone, C alone, A and B exist at the same time, A and C exist at the same time, and C and C exist at the same time. B, there are seven situations of A, B, and C at the same time.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
  • plurality refers to two or more, unless expressly defined otherwise.

Abstract

一种光源组件和投影设备，光源组件（10）包括第一发光组件（1011），发出第一束激光（S1）和第二束激光（S2），第二发光组件（1012），发出不同于两束激光的第三束激光（S3）；第一束激光（S1）和第二束激光（S2）入射至荧光轮（103），能够激发荧光区分别产生第一荧光（E1）和第二荧光（E2），第一荧光（E1）和第二荧光（E2）被荧光轮（103）反射后分别入射合光镜片（102）的不同反射区，并被反射向出光口方向；以及，第一束激光（S1）和第二束激光（S2）可被荧光轮（102）的反射区反射，入射至该合光镜片（102）的不同反射区，并反射向出光口方向，并且，第三束激光（S3）透射通过合光镜片（103）直接射向出光口方向，从而实现激光和荧光的合光输出。光源组件利于实现小型化。

Description

光源组件和投影设备
相关申请的交叉引用
本申请要求在2020年6月22日提交中国专利局、申请号为202010577390.4，发明名称为“光源组件和投影设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光电技术领域，特别涉及一种光源组件和投影设备。
背景技术
激光具有高亮度，单色性佳，寿命长等优点被应用于光电技术领域，其中，激光投影设备就是采用至少一种颜色的激光作为投影光源，比如，可以采用蓝色激光光源作为激发光源和蓝色基色光光源，并采用荧光轮产生除蓝光以外的其他基色光，或者，采用蓝色激光光源和红色激光光源，并采用荧光轮产生至少除蓝光和红光之外的其他基色光。或者，采用蓝色激光光源、红色激光光源和绿色激光光源，而不再采用荧光轮产生荧光。
而上述各个产品方案各有优劣。仅采用蓝色激光光源的激光投影设备，成本较低，但由于其他基色光为荧光，色彩表现力和亮度提升遇到瓶颈。
采用蓝色激光光源和红色激光光源的激光投影设备，需要在原蓝色激光光源激发荧光轮方案的基础上增加红色激光器部件的摆放，因此双色激光光源的体积通常比较大。
而对于纯三色激光器作为投影光源时，色域和亮度都可达到较佳的指标，但是成本较高，且纯色激光的应用也会带来较为明显的散斑问题。
发明内容
本申请实施例一方面提供了一种光源组件，所采用的技术方案如下：
一种光源组件，包括：
第一发光组件，用于发出第一束激光和第二束激光；
第二发光组件，用于发出第三束激光，第三束激光的颜色不同于第一束激光和第二束激光；
荧光轮，设置有荧光区和反射区；
会聚镜组，用于将第一束激光和第二束激光会聚入射荧光轮；
合光镜片，设置于第一发光组件、第二发光组件和荧光轮之间，其中，第三束光透射通过合光镜片射向光源组件的出光口方向，合光镜片具有多个反射区和至少一个透射区，
第一束光和第二束光分别透射通过合光镜片的不同透射区射向荧光轮，荧光区能够受激分别产生第一荧光和第二荧光；第一荧光和第二荧光均被荧光轮反射后入射合光镜片的不同反射区，并分别被合光镜片的不同反射区反射向光源组件的出光口方向；
第一束激光和第二束激光还能够被荧光轮的反射区反射后，入射至合光镜片的不同反射区，并分别被合光镜片的不同反射区反射向光源组件的出光口方向。
另一方面，提供了一种投影设备，所述投影设备包括：上述技术方案所述的光源组件，以及光机和镜头；
光源组件用于向光机发出照明光束，光机用于将光源组件发出的照明光束进行调制，并投射至镜头，所述镜头用于将经光机调制的光光束进行投射成像。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1-1是本申请实施例提供的光源组件的一种光路示意图；
图1-2是本申请实施例提供的激光光束入射荧光轮的光路示意图；
图2-1是本申请实施例提供的光源组件的一种光路示意图；
图2-2是本申请实施例提供的光源组件的另一光路示意图；
图3-1是本申请实施例提供的一种荧光轮的轮面示意图；
图3-2是本申请实施例提供的一种荧光轮的轮面示意图；
图4-1是本申请实施例提供的另一种光源组件的光路示意图；
图4-2是本申请实施例提供的又一种光源组件的光路示意图；
图5-1是本申请实施例提供的一种合光镜片的示意图；
图5-2是本申请实施例提供的又一种合光镜片的示意图；
图6-1，6-2是本申请实施例提供的一种发光组件的光路示意图；
图7是本申请实施例提供的一种投影设备的光路示意图；
图8是本申请实施例提供的一种投影设备的结构示意图；
图9-1，图9-2是本申请实施例应用的发光组件的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请技术方案所涉及的光源组件应用于激光投影设备中。在本申请示例中，激光投影设备可包括：光源组件，光机和镜头，其中，光源组件作为发光源，光机位于光源组件的出光侧，镜头位于光机的出光侧。光源组件用于提供照明光束，可以时序性的提供三基色光(也可以在三基色光基础上增加其他色光)，混光形成白光，也可以是同时输出三基色光，持续发出白光。
光机中包括核心的光调制部件，用于根据图像显示信号对光源组件发出的照明光束进行调制，形成带有图像信息的光束，并将这些光束汇聚至镜头，镜头用于将光机调制后的光束进行投射成像。其中，光源组件中包括激光器，可发出至少一种颜色的激光，比如蓝色激光。光机中光调制部件可以是DMD数字微镜阵列，也可以是LCD液晶光阀。镜头可以是长焦镜头，也可以是短焦镜头。
在本申请示例中，以光源组件时序性输出基色光为例进行下面示例的说明。
以及，在本申请示例中，激光投影设备可以基于DLP投影架构，其中光调制部件为DMD芯片，以及，镜头可以为超短焦镜头，这样本示例中的激光投影设备可以是超短焦激光投影设备，可以较小的投射比实现较大尺寸画面的投射。
具体地，下面将先介绍光源组件的各种实施例。
如图1-1所示，是本申请实施例提供的一种光源组件的光路架构图，以及，图2-1是基于图1-1的光源组件的荧光激发光路示意图。
如图1-1所示，该光源组件10可以包括：
第一发光组件1011，用于发出第一束激光S1和第二束激光S2。
第二发光组件1012，用于发出第三束激光S3，其中，第三束激光的颜色不同于第一束激光S1和第二束激光S2；
荧光轮103，设置有荧光区和反射区(图中未示出该荧光区和反射区，在其他附图中示出)，且荧光轮103不设置有透光区；
会聚镜组105，位于荧光轮103的正面，设置于第一束激光S1和第二束激光S2入射荧光轮103的光路径中，用于对激发光光束进行会聚，来形成较小的激发光光斑，具体地，用于将第一束激光S1和第二束激光S2会聚入射荧光轮103。
其中，第一束激光S1和第二束激光S2分别入射至会聚镜组105镜面的不同位置，并均通过会聚镜组105会聚后入射至荧光轮103。
合光镜片102，位于第一发光组件1011，第二发光组件1012以及荧光轮103之间，也就是合光镜片102为上述三个光输出部件从三个方向围绕设置。
随荧光轮103旋转，荧光区和反射区会交替接受激光光束的照射。
当荧光区接收第一束激光S1和第二束激光S2的照射时，在本示例中，第一束激光S1和第二束激光S2可以同时从第一发光组件中出射，也可视为同时用于激发荧光区。
如图1-2中所示，第一束激光S1和第二激光S2入射至会聚镜组105上时，均不通过会聚镜组105的光轴h，且也不关于光轴h对称。进一步地，第一束激光S1和第二束激光S2分布于会聚镜组105的光轴h的两侧且不关于光轴h对称。
在一具体实施中，第一束激光S1和第二激光S2入射至会聚镜组105上的镜面位置和其各自在荧光轮103上的会聚位置的连线，与会聚镜组105的光轴h所成的夹角不同，比如一个夹角为α，一个夹角为β，其中，α≠β。需要说明的是，当两者形成的夹角不同时，两束激光光束可以位于光轴h的两侧，也可以位于光轴h的一侧。在本示例中，以两束激光分布于光轴h的两侧为例进行示例。
或者，在一具体实施中，第一束激光S1和第二束激光S2入射至会聚镜组105镜面的位置到会聚镜组105的光轴h的距离不同，比如一个距离为d1，一个距离为d2，其中，d1≠d2，需要说明的是，当两者距离光轴h的距离不同时，两束激光光束可以位于光轴h的两侧，也可以位于光轴h的一侧。在本示例中，以两束激光分布于光轴h的两侧为例进行示例。
参见图2-1，对应第一束激光S1和第二束激光S2，荧光区能够受激分别产生第一荧光E1和第二荧光E2，第一荧光E1和第二荧光E2可均被荧光轮103反射，并透射通过会聚镜组105后分别入射合光镜片102的第一反射区1022a和第二反射区1022b。
以及，继续参见图1-1，图2-1，其中，第一反射区1022a和第二反射区1022b均倾斜于荧光轮103的轮面设置，在具体实施中，第一反射区1022a和第二反射区1022b为同一合光镜片的不同区域，沿相同的倾斜角度设置。以及，合光镜片102还具有至少一个透射区，比如，第二透射区1021b位于第一反射区1022a和第二反射区1022b之间，第二透射区1021b可以允许第一束激光S1和第二束激光S2两者之一通过，引导激光光束射向荧光轮103。而第一反射区1022a和第二反射区1022b均不位于第一束激光S1和第二束激光S2的光路中，不会对上述两束激发光形成阻挡。
由于第一荧光E1和第二荧光E2几乎可视为同时被激发且被荧光轮103反射，以及被 会聚镜组105进行光束角度的准直，因此，第一荧光E1和第二荧光E2几乎是同时分别入射至第一反射区1022a和第二反射区1022b的反射面，并被这两个反射部件反射出去，在本示例中，均朝向光源组件的出光口方向反射。
以及，对于第二发光组件1012，发出的第三束激光S3可以透射通过第一反射区1022a和第二反射区1022b之间的间隔，即第二透射区1021b,直接射向光源组件的出光口方向。
从而，随荧光轮旋转，第一发光组件发出的第一束激光和第二束激光射向荧光轮的反射区时，该两束光被荧光轮的反射区反射，并再次通过会聚镜组后出射至不同的两个反射部，进而被该不同的反射部反射至光源组件的出光口方向。当该两束光射向荧光区时，该两束光激发荧光区产生不同方向的荧光，荧光被荧光轮反射后也向不同的反射部出射，进而该不同的反射部将荧光也反射至出光口方向，以及第二发光组件的光束透射通过上述合光镜片(可以仅透射通过合光镜片的部分区域)直接射向光源组件的出光口方向，从而第一束激光、第二束激光、荧光、第三束激光均利用一个合光镜片即可完成合光，一方面使用较少的光学镜片就能够实现激发光束和受激光束的合光，同时还兼顾了另外颜色的激光的合束或合光，光源架构紧凑，利于实现光源组件的体积小型化。
以及，参见图3-1，示例性的给出了一种荧光轮轮面的结构示意图。如图所示，荧光轮103包括荧光区1031和反射区1032，其中荧光区1031和反射区1032围合形成闭环形状，比如可以围合成环状；荧光区1031和反射区1032也可以均为扇形，从而可以围合形成圆盘状。在本示例中，荧光轮不包括透光区。
荧光轮103的荧光区中可以至少设置有绿色荧光材料，该荧光材料可以为荧光粉。该荧光区中也可以设置黄色荧光材料。每种颜色的荧光材料可以在激光的激发下发出对应颜色的荧光。在一具体实施中，激发得到的该荧光也可以为一种。如此，荧光轮103的荧光区可以在第一发光组件发出的光的作用下发出绿色荧光，或者还可以包括黄色荧光。
示例地，本申请实施例中荧光轮103中的荧光区可以包括至少一个子荧光区，每个子荧光区可以包括一种颜色的荧光材料。当该荧光区包括多个子荧光区时，该多个子荧光区与反射区可以呈圆周排布。如图3-2所示，该荧光区1031可以包括两个子荧光区G1和G2。该荧光轮103可以绕转轴Z沿w方向或w方向的反方向转动。该两个子荧光区可以分别包括绿色荧光材料和红色荧光材料，或者该两个子荧光区可以分别包括绿色荧光材料和黄色荧光材料，或者该两个子荧光区可以分别包括绿色荧光材料和桔色荧光材料。
需要说明的是，图3-1或图3-2中的各荧光区和反射区的面积比例仅作为示例。在一具体实施中，荧光轮中各个子荧光区和反射区的面积也可以不同，各个子荧光区和荧光轮的反射区的面积可以根据其射出的光线的颜色进行设计。假设，射向荧光轮的反射区的激光为蓝色激光；子荧光区G1包括黄色荧光材料，能够在蓝色激光的激发下发出黄光；子荧光区G2包括绿色荧光材料，能够在蓝色激光的激发下发出绿光。
在一具体实施中，子荧光区的个数也可以为四个、五个或者其他个数；各个子荧光区射出的荧光的颜色可以均不同，或者也可以存在射出相同颜色的荧光的至少两个子荧光区，该至少两个子荧光区可以不相邻。
结合图2-1，示出了一种荧光激发的光路示意图，需要说明的是，随着荧光轮的转动，不同的荧光材料会根据转动时序依次且重复性的采用与图2-1相同的光路示意产生荧光，以及不同颜色的荧光也会参照图2-1中示意的路径被反射，准直，并最终被第一反射区1022a，第二反射区1022b反射。在此不再赘述其他荧光的激发过程，可参见前述说明。
以及，本申请实施例中，可以通过多种方式实现制备荧光轮。
在一种可选方式中，荧光轮103可以具有反射基板，荧光轮103的反射区可以为该反射基板的一部分，比如，荧光轮具有金属基板，比如铝基板，铝基板朝向光入射的一面具有镜面。荧光轮103的荧光区可以位于反射基板上，该反射基板的表面为反光面。如可以在反射基板上的固定位置涂覆荧光材料，以形成荧光轮的荧光区，反射基板中未涂覆荧光材料的区域形成荧光轮的反射区。在一具体实施中，该反射基板可以呈圆形或者也可以呈环状，或者也可以呈其他形状，如矩形或六边形等。当反射基板呈其他形状时，可以通过设计荧光材料的涂覆区域，使荧光区与反射区围成环状。
在另一种可选方式中，荧光轮的基板也可以不为反射基板，如该基板为陶瓷基板，陶瓷基板上可以设置反射膜层，比如，荧光轮的反射区包括反射涂层。例如，可以在反光效果较差的环状结构上涂覆荧光材料和反射涂层，以得到荧光轮。其中，涂覆荧光材料的区域形成荧光轮的荧光区，涂覆反射涂层的区域形成荧光轮的反射区。
下面结合图2-2来介绍光源组件中激光光束的光路示意路径。
如图2-2所示，第一束激光S1和第二束激光S2均由第一发光组件1011发出，且第一束激光S1和第二激光S2为分离不重叠的两束光，在具体实施中，第一束激光S1和第二束激光S2之间具有间隔，从而允许第一束激光S1和第二束激光S2可以入射至光路径中光学镜片的不同位置。
以及，第一发光组件1011发出的第一束激光S1和第二束激光S2可以为独立的两束光，或者该第一束激光S1和第二束激光S2也可以为一束光中的两部分光，本申请实施例不做限定。在一具体实施中，第一发光组件1011可以不仅发出两束光，也可以发出三束光、四束光甚至更多，本申请实施例对第一发光组件发出的光束的个数不做限定。本申请实施例中所述的第一束激光和第二束激光可以为第一发光组件发出的多束光中的任意两束光，对于第一发光组件发出其他个数束光的情况均可以参考对该第一束激光和第二束激光的介绍，本申请实施例不再赘述。
如图2-2所示，合光镜片102，倾斜于荧光轮103的轮面设置，包括至少一个透射区。如图6-1所示，在本申请示例中，对应于第一束激光和第二束激光，合光镜片102包括两个透射区，其中，第一透射区位于合光镜片102远离荧光轮103的一端，第一反射区位于合光镜片102靠近荧光轮103的一端，而第二透射区和第二反射区则位于第一反射区和第一透射区之间。
在一种具体实施中，经第一透射区透射的激光光束照射至荧光轮上后，随轮的旋转，或被反射，或激发荧光轮产生荧光，均可被荧光轮反射后入射到达第一反射区，以及，经第二透射区透射的激光光束照射至荧光轮上后，同理也是或被反射，或激发荧光轮产生荧光，均可被荧光轮反射后入射到达第二反射区。
如图2-2中所示，第一束激光S1和第二束激光S2分别透射通过合光镜片102的不同透射区(如第一透射区1021a和第二透射区1021b)，以及，第一束激光S1和第二束激光S2均通过会聚镜组105会聚后入射至荧光轮103。也即是，第一束激光S1和第二束激光S2通过合光镜片102的不同透射区射向会聚镜组105，进而通过会聚镜组105会聚后入射至荧光轮103。
随荧光轮103旋转，当荧光区接收第一束激光S1和第二束激光S2的照射时，荧光区受激发产生的荧光被荧光轮103反射，并透射通过会聚镜组105；合光镜片102还包括多 个反射区(如第一反射区1022a和第二反射区1022b)，经会聚镜组105透射的荧光分别入射至合光镜片102的不同反射区，合光镜片102不同的反射区将荧光朝向出光口方向反射。此时该第一束激光和第二束激光也即是荧光的激发光束，该荧光区被激发射出的荧光可以称为受激光束。在一具体实施中，光源组件10的出光口方向(如图2-1中的x方向)可以垂直于合光镜片102、会聚镜组105和荧光轮103的排布方向(也即y方向)。
当荧光轮103的反射区接收第一束激光S1和第二束激光S2的照射时，第一束激光S1和第二束激光S2被荧光轮103的反射区反射并再次透射通过会聚镜组105后，入射至合光镜片102的不同反射区，合光镜片102的该不同反射区将第一束激光S1和第二束激光S2朝向出光口方向反射。如图5-1所示，第一束激光S1被荧光轮103的反射区反射并再次透射通过会聚镜组105后，入射至合光镜片102的第一反射区1022a；第二束激光S2被荧光轮103的反射区反射并再次透射通过会聚镜组105后，入射至合光镜片102的第二反射区1022b。
其中，合光镜片102的透射区或反射区间隔设置。例如，合光镜片102的透射区和反射区可以交替设置。如图5-1或图6中第一透射区10112a和第二透射区10112b之间间隔有第二反射区1022b，第一反射区1022a和第二反射区1022b之间间隔有第二透射区1021b。
合光镜片102中的透射区可以透射第一发光组件1011发出的光(如第一束激光和第二束激光)，合光镜片102中的反射区可以将射入的光(荧光、第一束激光、第二束激光)均反射至光源组件10的出光口。
会聚镜组105将这两束光束均进行会聚至荧光轮103的正面，形成一个较小的激发光斑。
当荧光轮103的反射区接收第一束激光S1和第二束激光S2的照射时，第一束激光S1和第二束激光S2可被荧光轮103的反射区反射，并再次透射通过会聚镜组105后入射至合光镜片102的第一反射区1022a和第二反射区1022b。
在一具体实施中，第一束激光S1和第二束激光S1入射至会聚镜组105上的镜面位置与在荧光轮上的会聚位置各自的连线，与会聚镜组105的光轴h所成的夹角不同。
以及，第一束激光S1和第二束激光S2均不通过会聚镜组105的光轴，且两束激光也不关于会聚镜组105的光轴h对称。
如会聚镜组中第一束激光射向的位置与第一束激光在荧光轮上的会聚位置的连线为第一连线，该第一连线与会聚镜组的光轴的夹角为第一夹角；会聚镜组中第二束激光射向的位置与第二束激光在荧光轮上的会聚位置的连线为第二连线，该第二连线与缩束镜组的光轴的夹角为第二夹角；该第一夹角不同于第二夹角。示例地，请继续参考2-2，第一束激光S1与会聚镜组102的光轴h形成的第一夹角为角α，第二束激光S2与会聚镜组102的光轴h形成的第二夹角为角β，α＞β。这样，第一束激光与第二束激光可以以不同的入射角度入射至会聚镜组的镜面，比如，会聚镜组的第一片透镜的凸面，但根据反射原理，第一束激光和第二束激光各自的反射光路将不会重叠，从而被荧光轮反射区反射的第一束激光和第二束激光可以沿不同的反射光路分别入射第一反射区1022a和第二反射区1022b，并被上述两个反射部件反射，比如朝向光源组件的出光口方向出射。
上述会聚镜组的第一片透镜是指会聚镜组中先接受激光入射的透镜。
以及，为了实现上述图2-1和图2-2所示的激发光路，当合光镜片仅包括一个透射区时，即仅包括位于两个反射区之间的第二透射区时，第一束激光和第二束激光两者之一还 可以可从合光镜片的第一反射区和第二反射区之间的第二透射区透过，而另一从第一反射区或第二反射区远离该第二透射区的一侧透过，比如可以视为从这两个反射区中某一个反射区的外侧透过。
以及，在图2-2所示例中，在第一束激光和第二束激光入射至荧光轮的路径中还包括缩束镜组106，位于第一发光组件1011和第一反射区1022a、第二反射区1022b之间，用于缩小从第一发光组件发出的第一束激光和第二束激光的光斑。该缩束镜组106可以使射出的激光的光束相比射入的激光的光束更细，便于通过后面光路中镜片。
在一具体实施中，该缩束镜组106可以为望远镜镜组，该缩束镜组106可以包括一个凸透镜1061和一个凹透镜1062。在一具体实施中，缩束镜组106的光轴与会聚镜组105的光轴可以共线或重合。
在一具体实施中，第一束激光和第二束激光入射至缩束镜组106的镜面位置不同，且第一束激光、第二束激光均不通过缩束镜组的光轴。
在一具体实施中，第一束激光和第二束激光入射至缩束镜组106的镜面位置可以不关于缩束镜组106的光轴对称。
需要说明的是，当第一束激光和第二束激光入射至会聚镜组105的镜面位置不同时，由于缩束镜组和会聚镜组共轴，虽然对激光光束具有缩小光斑面积的作用，但是，未缩束前的第一束激光和第二束激光入射至缩束镜组106时，也同样的入射至缩束镜组106镜面的不同位置，从而也不关于缩束镜组106的光轴对称。
以及，在上述实施例基础上，图4-1示出了本申请提供的另一种光源组件的光路示意图。
与图1-1，图2-1，图2-2的光源组件的示意图的不同在于，图4-1中，第一发光组件1011的出光面与荧光轮103的轮面垂直，而不是相向平行。沿第一发光组件1011的出光面方向还设置有转折镜片108，用于将第一发光组件发出的光束反射向荧光轮103的轮面方向。
在具体实施中，第一发光组件1011可以为MCL型激光器1011，激光器1011的出光面可以与荧光轮103的轮面或受光面垂直。
光源组件10还可以包括多个转折镜片108，该多个转折镜片108可以沿激光器1011的出光方向排布，该多个转折镜片108用于反射激光器10出射的光束以形成多束光。该多个转折镜片108与激光器1011的出光面的距离可以均不同。如图4-2所示，该多个转折镜片108可以包括两个转折镜片，该两个转折镜片分别用于反射激光器1011出射的光束中的不同部分，以形成第一束激光S1和第二束激光S2，且第一束激光S1和第二束激光S2之间具有间隙。
示例地，每个转折镜片与激光器的出光面的距离可以包括：该转折镜片靠近激光器的表面中的任一点与该出光面的距离。该多个转折镜片可以满足：任意两个转折镜片中，一个转折镜片在激光器的出光面上的至少部分正投影，位于另一个转折镜片在激光器的出光面上的正投影之外；该一个转折镜片中的点与激光器的最小间距可以大于另一个转折镜片中的点与激光器的最大间距。故每个转折镜片靠近激光器的表面中的任一点与激光器的距离，均不同于其他转折镜片靠近激光器的表面中所有点与激光器的距离。
在一具体实施中，转折镜片的各个表面可以均为反光面，或者转折镜片中也可以仅朝 向激光器1011的表面为反光面。本申请实施例中转折镜片的个数可以为大于或等于1的整数，图4-1以光源组件10包括两个转折镜片为例进行示意，在一具体实施中，该转折镜片的个数也可以为一个、三个、四个或更多。光源组件仅包括一个转折镜片时，该转折镜片可以用于调整激光器发出的激光的传输方向。在光源组件包括多个转折镜片时，该多个转折镜片可以用于对激光器发出的激光进行分束，且还可以通过调整各个转折镜片的位置调整分束得到的各束激光之间的距离。
示例地，如图6-1和图6-2所示，激光器1011可以发出至少两束激光，该至少两束激光可以射向两个转折镜片108，每个转折镜片108可以分别反射该一束激光中射向该转折镜片108的部分激光，进而该两个转折镜片108可以将该一束激光分成第一束激光S1和第二束激光S2。
激光器1011也可以发出多束激光，比如四束或者更多束，可以通过将这些多束激光光束分别射向两个转折镜片108，每个转折镜片108反射输出形成一束激光光束。
如图6-1和6-2所示，光源组件中两个转折镜片108在x方向(也即激光器1011的出光方向)上的间距越大，对激光器1011发出的激光进行分束得到的该两束激光的间距就越大。故可以通过调整各个转折镜片108在激光器1011的出光方向上的间距，来调整各个转折镜片108射出的各束激光之间的间距，从而达到入射至光学镜片上不同位置的目的。
以及，图4-2是在图4-1示例基础上提供的再一光源组件的实施例。
在图4-2所示的光源组件图示中，激光器1011可以发出两束光，并经过转折镜片108的转折作用，形成两束射向缩束镜组106的激光光束。第一束激光和第二束激光均不通过缩束镜组6的光轴，经过缩束镜组106的缩束，第一束激光和第二束激光的光束均变细，并避开第一反射区1022a和第二反射区1022b，射向会聚镜组105。会聚镜组105和缩束镜组的光轴重合，经过缩束的第一束激光和第二束激光照射至会聚镜组镜面的不同位置，并经过会聚后入射荧光轮的同一光斑位置，对荧光轮103的荧光区进行激发，或者被荧光轮103的反射区反射。
无论是被荧光轮反射回的第一束激光、第二束激光，还是被荧光轮反射回的第一荧光和第二荧光，时序性地射向第一反射区1022a、第二反射区1022b，并被该两个反射部反射向光源组件的出光口方向，形成时序性的照明光束。
以及，本申请实施例中光源组件10还可以包括：第三镜片107。第一束激光和第二束激光透射通过缩束镜组105且入射荧光轮103之前还经过第三镜片107，该第三镜片107可以为匀光镜片，比如可以为扩散片。该第三镜片107可以位于缩束镜组106与第一反射区1022a、第二反射区1022b之间。激光器发出的激光通过缩束镜组106进行光束缩束后向第三镜片107出射，第三镜片107可以对射入的两束不同的激光进行匀化后出射，能量密度匀化的激发光束有利于提高荧光激发的转换效率。
在一具体实施中，第三镜片也可以是复眼透镜。
需要说明的是，相关技术中投影设备进行投影显示时通常会产生散斑效应。散斑效应指的是相干光源发出的两束激光在照射粗糙的物体(如投影设备的屏幕)发生散射后，该两束激光就会在空间中产生干涉，最终在屏幕上出现颗粒状的明暗相间的斑点的效应。散斑效应使得投影图像的显示效果较差，且明暗相间的这些未聚焦的斑点在人眼看来处于闪烁状态，长时间观看易产生眩晕感，用户的观看体验较差。而本申请实施例中，第一发光 组件发出的激光可以在扩散片或复眼透镜的作用下变得较为均匀，进而将这些激光用于投影产生的干涉较弱，可以减弱投影设备进行投影显示时的散斑效应，避免投影图像变花，提高投影图像的显示效果，避免人眼观看产生的眩晕感。
以及，在第二发光组件1012入射至合光镜片102的路径中还可以设置扩散部件109。扩散部件109可以具体地为扩散片，可以为固定设置的扩散片，也可以是运动的扩散片，比如振动或旋转运动。通过扩散部件109后，红色激光的匀化程度会提高，利于减轻红色激光的散斑效应。
以及，合光镜片102的任一位置均可以透过第二发光组件1012发出的光(如第三束光)，合光镜片102中的透射区可以透射第一发光组件1011发出的光(如第一束光和第二束光)，合光镜片102中的反射区可以将射入的光(荧光、第一束光或第二束光)均反射至光源组件10的出光口(如会聚透镜104所在处)。在一具体实施中，由合光镜片102射至会聚透镜104的光形成的光斑的中心可以经过会聚透镜104的光轴，也可以不经过会聚透镜104的光轴，本申请实施例不做限定。
本申请实施例中，第一束光和第二束光穿过合光镜片102射向荧光轮103的反射区后，该荧光轮103的反射区可以将该第一束光和第二束光反射至合光镜片102中的不同反射区，进而合光镜片102中的不同反射区可以将该第一束光和第二束光反射至出光口。第一束光和第二束光穿过合光镜片102射向荧光轮103的荧光区后，该荧光区可以在该第一束光和第二束光的激发下发出荧光，且将该荧光射至合光镜片102中的反射区，进而合光镜片102中的反射区可以将该荧光反射至出光口。
需要说明的是，上述示例中仅以第一发光组件1011发出的第一束光和第二束光，分别透过合光镜片102的第一透射区1021a和第二透射区1021b，进而射向荧光轮103的反射区的情况，对光线的传输过程进行示意。此种情况中，荧光轮103的反射区反射的光线可以仅射向合光镜片102中的反射区，如第一束光射向第一反射区1022a，第二束光射向第二反射区1022b。在一具体实施中，对于第一发光组件101发出的光射向荧光轮103的荧光区的情况，该荧光区发出的荧光可以既射向合光镜片102中的反射区，还可以射向合光镜片102中的透射区，本申请实施例未对此种情况的光线传输过程进行示意。
本申请实施例中，合光镜片102中的透射区仅需保证可以透过第一发光组件1011发出的激光以及第二发光组件1012发出的激光，且反射荧光轮的荧光区发出的荧光即可；合光镜片102中的反射区仅需保证可以透过第二发光组件1012发出的激光，且反射第一发光组件1011发出的激光以及荧光轮的荧光区发出的荧光即可。对于颜色不同于第一发光组件和第二发光组件发出的激光，以及不同于该荧光的光是否能透过该合光镜片102中的透射区或反射区，本申请实施例不做限定。在一具体实施中，合光镜片102中的透射区可以反射颜色不同于第一发光组件和第二发光组件发出的激光，合光镜片102中的反射区可以反射颜色不同于第二发光组件发出的激光的光。
在一具体实施中，第一发光组件发出的激光、第二发光组件发出的激光以及荧光区发出的荧光的颜色可以均不同。如第一发光组件可以发出蓝色激光，即第一束光和第二束光均为蓝色激光；第二发光组件可以发出红色激光，即第三束光为红色激光；荧光区发出绿色荧光和黄色荧光中的至少一种。在一具体实施中，第一发光组件发出的激光、第二发光组件发出的激光以及荧光区发出的荧光也可以为其他颜色，本申请实施例不做限定。
在本申请方案的上述一个及多个实施例中，第一发光组件发出的第一束激光和第二束激光均作为激发光，并射向会聚镜组镜面的不同位置，不关于会聚镜组的光轴对称，可以激发荧光轮产生不同出射方向的第一荧光和第二荧光。
由于激光光束为高能光束，如果期望以提高单束激光光束的能量密度来提高荧光的发光功率，不但会给光路中的光学镜片带来不可靠性和较高耐热要求，导致光路架构成本的增加，还有可能因为高能量密度的光束的照射给荧光轮带来散热的问题，反而降低荧光转换效率。
在本申请技术方案中，将激光激发光束设置为两束，对于设置于激发光路中的镜片来说，不同的两束光照射至镜片的不同位置，可以减轻镜片局部长期受高能光束照射带来的老化或者性能下降问题。
以及，通过将两束激光照射至会聚镜组的不同位置，进而入射至荧光轮的方向也不同，当会聚于荧光轮的反射区时，两束激光光束被反射后再次透过准直镜组后按照反射定律进行出射，从而两束激光光束入射到不同的反射部件，并被不同的反射部件反射。
以及，同理地，将两束激光照射至会聚镜组的不同位置，进而入射至荧光轮的方向也不同，当会聚于荧光轮的荧光区时，该两束激光激发荧光区产生两束荧光，两束荧光被荧光轮轮反射后也经会聚镜组射向不同的反射部件。反射部件可以分时的将两束激光光束和荧光光束向同一方向反射，以完成合光。
如此一来，随着荧光轮的转动时序，光源组件可以时序性输出蓝色激光光束和荧光光束。
并且，对于第二发光组件，可以在上述第一发光组件不点亮的时候发出第三束激光，第三束激光至少通过合光镜片的第一反射区和第二反射区之间的间隔出射，直接射向光源组件的出光口方向，从而可以与前述的蓝色激光光束，荧光光束共同形成光源的三基色或四基色输出。
在本申请技术方案中，第一反射区、第二反射区作为合光部件，其中三个方向围绕设置有第一发光组件，第二发光组件和荧光轮，而剩余的一个方向为光源组件的出光口，这样，第一发光组件，第二发光组件，荧光轮三者出射的光束共用合光镜片的第一反射区和第二反射区作为合光部件，合光部件少，光源架构布局紧凑。
同时，第一反射区、第二反射区既作为第一发光组件发出的第一束激光、第二束激光的入射至荧光轮的引导部件，同时还作为第一束激光和第二束激光被荧光轮反射后的光接收部件，并被同向合光，因此，第一反射区、第二反射区还在荧光激发过程中进行了复用。
以及，通过在第一发光组件的出光面设置转折镜片，通过转折镜片距离出光面的远近，来调节第一束激光和第二束激光之间的间距，从而改变两束激光入射至光学镜片镜面上的位置，实现两束激光相对于镜片光轴的不对称设置。
基于上述不对称设置，从而使得两个激发光路不会重叠，且提高了镜片区域的利用率，既能够提高激发功率，还不会增加对光学镜片局部的耐受度要求。
以及，在本申请技术方案中，荧光轮上设置有激光反射区，与相关技术中设置激光透射区进而需要设置中继回路系统相比，本申请方案中的光源组件光学部件少，光路架构紧凑，在实现较高发光功率的同时还能够兼顾光源组件的小型化。
以及，作为上述实施例的改进或变型，在一具体实施中，光源组件10的出光口方向还可以设置集光部件，或者，依次设置会聚透镜104和集光部件，完成经合光镜片的第一 反射区和第二反射区时序性反射的荧光、激光光束的收集，作为光源组件的输出。
以及，在本申请实施例中，第一发光组件和第二发光组件均可以采用MCL激光器，包括多颗发光芯片。
比如，图9-1，图9-2示出了两种不同阵列排布的MCL型激光器，MCL型激光器包括呈阵列排布的多个发光芯片，光束按照行或者列方向出射。
图9-1示出了一种具有两行七列发光芯片的MCL激光器，图9-2示出了一种具有四行六列发光芯片的MCL激光器。
在一具体实施中，如图4-2所示，会聚镜组105可以包括至少一个凸透镜，且每个凸透镜的凸弧面朝向合光镜片102。
前述多个实施例中图示均以该会聚镜组105包括两个凸透镜为例进行示意，比如会聚镜组105还可以是一片超球面透镜和一片平凸透镜形成的透镜组或凹凸透镜形成的透镜组。
在一具体实施中，会聚镜组105也可以包括一个或三个凸透镜。当会聚镜组105包括多个凸透镜时，该多个凸透镜可以沿合光镜片102与荧光轮103的排布方向依次排布，且该多个凸透镜的光轴共线。会聚镜组105包括多个凸透镜可以保证射入会聚镜组的激光更精准地在荧光轮103会聚。
示例地，请继续参考图1-1，图2-1，图2-2，图4-1，图4-2，第一透射区1021a位于合光镜片102远离荧光轮103的一端，第一反射区1022a位于合光镜片102靠近荧光轮103的一端。该第二透射区1021b可以为透射至荧光轮103中反射区的激光透过的透射区，第一透射区1021a可以为透射至荧光轮103中荧光区的激光透过的透射区。例如，随着荧光轮103的转动，在荧光轮103的反射区位于第一发光组件1011发出的激光的照射区时，激光器1011可以向更靠近激光器的转折镜片发出激光；该激光可以在转折镜片上反射后穿过第二透射区1021b射向荧光轮103的反射区，进而该荧光轮103的反射区可以将该激光反射至第二反射区1022b。在荧光轮103上的荧光区位于第一发光组件1011发出的激光的照射区时，激光器1011可以向更远离激光器的转折镜片发出激光；该激光可以在转折镜片上反射后穿过第一透射区1021a射向荧光区；在该激光的激发下荧光区可以向第一反射区1022a出射荧光。由于荧光从荧光轮103到第一反射区1022a的光程较短，故荧光在第一反射区1022a上形成的光斑较小，荧光的光束较细，第一反射区1022a较容易将荧光全部反射向光源组件的出光口。
在一具体实施中，合光镜片102可以倾斜于第一发光组件发出的第一束激光和第二束激光的行进方向设置，也即是合光镜片102与该行进方向存在夹角。该合光镜片102可以朝该出光口倾斜。或则，该合光镜片102相对于荧光轮103的轮面呈45度倾斜设置。
在一具体实施中，合光镜片102中的透射区和反射区的个数可以大于或等于第一发光组件发出的光束的个数。如本申请实施例以第一发光组件1011发出两束光，合光镜片102包括两个透射区和两个反射区为例。在一具体实施中，合光镜片102中透射区和反射区个数也可以为三个、四个或者更多，本申请实施例对此不做限定。在一具体实施中，合光镜片除该多个透射区和该多个反射区之外还可以包括其他区域，可以并无光线射向该其他区域。
示例地，如6-1所示的合光镜片的平面结构图所示，合光镜片102包括第一透射区1021a、第二透射区1021b、第一反射区1022a和第二反射区1022b。合光镜片102中的透射区与反 射区可以沿第二方向(如图5-1中的x方向)交替设置，如第一反射区1022a、第二透射区1021b、第二反射区1022b和第一透射区1021a可以沿第二方向依次排布。合光镜片102朝出光口倾斜，比如45度倾斜设置，故第一透射区1021a可以远离会聚镜组105设置，第一反射区1022a可以靠近所述会聚镜组105设置。需要说明的是，合光镜片102呈45度倾斜设置，也即是合光镜片102与第一发光组件发出的激光的行进方向的夹角为45度。该夹角也可以为其他角度，本申请实施例不做限定。
本申请实施例中，合光镜片102中的每个透射区可以与一个反射区相对应，从某透射区透过的光线若在荧光轮的反射区反射，则可以被荧光轮的反射区反射后射向合光镜片中该透射区对应的反射区。若从某透射区透过的光线入射至荧光轮的荧光区，则激发出的荧光被荧光轮反射后，至少射向合光镜片中该透射区对应的反射区。示例地，请继续参考图6，合光镜片102中的第一透射区1021a与第一反射区1022a对应，第二透射区1021b与第二反射区1022b对应。
以及，第一透射区1021a与第一发光组件1011的距离可以小于第二透射区1021b与第一发光组件1011的距离，激光(如第一束激光S1)从第一发光组件1011到第一透射区1021a的光程，短于激光(如第二束激光S2)从第一发光组件1011到第二透射区1021b的光程；第一反射区1022a与荧光轮103的距离小于第二反射区1022b与荧光轮103的距离，光线(如第一束激光S1或荧光)从荧光轮103到第一反射区1022b的光程，短于光线(如第二束激光S2或荧光)从荧光轮103到第一反射区1022a的光程。由于光线的光程越短形成的光斑越小，所以第一透射区1021a上的光斑可以小于第二透射区1021b上的光斑，第一反射区1022a上的光斑可以小于第二反射区1022b上的光斑。进而，第一透射区1021a仅需较小的面积即可完成对射入的激光的透射，第一反射区1022a仅需较小的面积即可完成对射入的光线的反射，故第一透射区1021a的面积可以小于第二透射区1021b的面积，第一反射区1022a的面积可以小于第二反射区1022b的面积。
本申请实施例中，可以通过下述方式实现合光镜片102中反射区和透射区的功能。
在一种可选方式中，可以在透光基板上不同区域设置功能膜层，以得到合光镜片。示例地，对于反射区，合光镜片102的反射区可以具有镀膜。该镀膜可以为全波段反射膜，或者，该镀膜为针对红光波段、绿光波段和蓝光波段中至少一种波段的反射膜。该镀膜可以位于合光镜片102靠近会聚镜组105的一侧，也可以位于合光镜片102远离会聚镜组105的一侧，本申请实施例不做限定。对于透射区，合光镜片102靠近会聚镜组105的一侧，至少在透射区的表面设置有二向色膜。该二向色膜可以用于透蓝光，反射红光、黄光和绿光中至少一种光。例如，荧光轮的荧光区射向合光镜片102的荧光包括红光，在合光镜片102的透射区表面设置有二向色膜的基础上，即使该荧光射向该透射区，也会被该二向色膜反射，进而射向光源组件的出光口，提高了荧光的利用率。
在另一种可选方式中，合光镜片102的反射区也可以直接采用反光材料制作而成。在一具体实施中，合光镜片102中的透射区也可以直接采用具有二向色性的材料制备而成，该材料用于透蓝光，反射红光、黄光和绿光中至少一种光。此时，可以不再设置该镀膜和二向色膜。
在一具体实施中，合光镜片102远离会聚镜组105的一侧设置有增透膜；或者，合光镜片102远离会聚镜组105的一侧的透射区区域设置有增透膜。在一具体实施中，该增透膜针对全光谱的光线增加透过率，也可以仅针对第一发光组件发出的激光(如蓝色激光) 增加透过率，本申请实施例不做限定。
以及，在图4-1，图4-2所示的光源组件光路示意图中，光源组件中转折镜片108的个数可以与合光镜片中透射区的个数相同，且光源组件中的各个转折镜片可以与合光镜片中的各个透射区一一对应。每个转折镜片可以将射入的激光反射至对应的透射区。示例地，请继续参考图4-2，两个转折镜片108中，靠近激光器的转折镜片与合光镜片102中的第一透射区1021a对应，该转折镜片将射入的激光反射至第一透射区1021a。远离激光器的转折镜片与合光镜片102中的第二透射区1021b对应，该转折镜片可以将射入的激光反射至第二透射区1021b。本申请实施例中可以根据合光镜片中各个透射区的位置来设计对应的转折镜片的位置，以保证每个转折镜片将射入的激光反射至对应的透射区。
在一具体实施中，如图5-2所示，合光镜片102的受光面可以具有光扩散结构，第二发光组件1012与第一发光组件1011可以均用于向该受光面发出激光。如该受光面可以为合光镜片102朝向第二发光组件1012和第一发光组件1011的表面，也即是远离会聚透镜104的表面。在一具体实施中，该光扩散结构可以包括多个平行的条状凸起或者颗粒状的凸凹结构。
当合光镜片102采用如图6-2所示的光扩散结构时，可以省略图4-2中所示的匀光镜片107和扩散部件109，或者仅省略两者之一。
另外，由于激光在穿过二向色镜时会发生损耗，而相关技术中激发光束射向出光口的过程中需要两次穿过二向色镜，故激发光束的损耗较高。而本申请实施例中激发光束仅需要经过一次合光镜片即可射向出光口，故降低了激发光束的损耗。
本申请实施例中，可以通过下述方式实现合光镜片102中反射区和透射区的功能。
在一种可选方式中，可以在透光基板上不同区域设置功能膜层，以得到合光镜片。示例地，对于反射区，合光镜片102的反射区可以具有镀膜。该镀膜可以为针对绿光波段和蓝光波段中至少一种波段的反射膜。该镀膜可以位于合光镜片102靠近会聚镜组105的一侧，也可以位于合光镜片102远离会聚镜组105的一侧，本申请实施例不做限定。对于透射区，合光镜片102靠近会聚镜组105的一侧，至少在透射区的表面设置有二向色膜。该二向色膜可以用于透蓝光和红光，反射黄光和绿光中至少一种光。例如，荧光轮的荧光区射向合光镜片102的荧光包括绿光，在合光镜片102的透射区表面设置有二向色膜的基础上，即使该荧光射向该透射区，也会被该二向色膜反射，进而射向光源组件的出光口，提高了荧光的利用率。在一具体实施中，该镀膜和二向色膜可以设置在透光基板上，进而形成该合光镜片。
在另一种可选方式中，合光镜片102中的透射区和反射区也可以直接采用具有二向色性的材料制备而成，透射区的材料用于透蓝光和红光，反射黄光和绿光中至少一种光，反射区的材料用于透红光，反射蓝光、绿光和黄光中至少一种光。
在一具体实施中，合光镜片102远离会聚镜组105的一侧设置有增透膜；或者，合光镜片102远离会聚镜组105的一侧的透射区区域设置有增透膜。在一具体实施中，该增透膜针对全光谱的光线增加透过率，也可以仅针对发光组件发出的激光(如蓝色激光)增加透过率，本申请实施例不做限定。
基于上述实施例的光源组件架构，下面结合附图对发光组件发出的光进行介绍：
在一具体实施中，第一发光组件1011发出的第一束光和第二束光的波段可以具有重叠，第一发光组件1011发出的光的波段与第二发光组件1012发出的光(也即第三束光)的波段不重叠。示例地，该第一束光和第二束光均可以为蓝光。如该第一束光和第二束光的波段均可以为460纳米～480纳米；或者，该第一束光的波段可以为450纳米～470纳米，第二束光的波段可以为460纳米～480纳米；或者该第一束光和第二束光的波段也可以为其他波段，本申请实施例不做限定。该第三束光可以为红光，该第三束光的波段可以为610纳米～700纳米，或者660纳米～690纳米，或者也可以为其他波段，本申请实施例不做限定。
在一具体实施中，第一束光和第二束光的主波长不同。示例地，第一束光与第二束光可以为主波长不同的蓝光。需要说明的是，一束光由一个波段中多个波长的光复合得到，人眼感受到的该束光是其中各波长的光共同作用的综合结果，人眼感觉到该束光为对应于一个单一波长的光，该波长即为该束光的主波长。
在一具体实施中，该第一发光组件和第二发光组件均可以为多芯片激光二极管(multi_chip Laser Diode，MCL)型的激光器，MCL型的激光器可以包括封装在同一管壳中阵列排布的多个发光芯片，每个发光芯片均可以独立的发出激光。本申请实施例中的第一束光和第二束光可以来源于同一个第一发光组件，该第一束光和第二束光分别由该激光器不同的发光区域射出，如该第一束光和第二束光可以分别由该激光器中的不同发光芯片发出。或者，该第一束光和第二束光也可以来源于不同的第一发光组件，本申请实施例不做限定。
在激光器的第一种发光方式中，激光器可以同时向多个转折镜片均发出激光。例如，激光器可以包括多个发光芯片，该多个发光芯片可以同时发光，进而实现激光器同时向多个转折镜片均发出激光。此种情况中，激光器发出的激光的光束较粗，激光的亮度较高，该激光在通过转折镜片、合光镜片中的透射区、荧光轮和合光镜片中的反射区之后射向会聚透镜时亮度也较高。因此，会聚透镜可以将较高亮度的光用于投影设备的投射，进而可以保证投影设备进行投影得到的图像的亮度较高，保证了投影设备的投影效果较好。
在激光器的第二种发光方式中，激光器可以在不同时间向不同转折镜片发出激光。例如，激光器包括多个发光芯片，且各个发光芯片均对应一个转折镜片，每个发光芯片能够向对应的转折镜片发光。在不同时间激光器中发光的发光芯片不同，进而实现激光器可以在不同时间向不同转折镜片发出激光。此种情况中，由于同一时间仅激光器中的部分发光芯片发光，故发出的激光的光束较细，该激光在通过转折镜片、合光镜片中的透射区、荧光轮和合光镜片中的反射区之后射向会聚透镜时光束也较细。如此可以保证该激光光束较容易全部射入会聚透镜，避免激光的浪费，提高了会聚透镜会聚光的简易性。由于此种情况激光器中的发光芯片无需持续发光，故可以采用脉冲电流为发光芯片供电，而脉冲电流的能量较高，故可以激光发光芯片发出亮度较高的激光。且激光器中的发光芯片无需持续发光，可以提高激光器中发光芯片的使用寿命。
在一具体实施中，激光器可以根据荧光轮中荧光区与反射区的切换时序，向不同转折镜片发出激光，使得不同转折镜片反射的激光穿过对应的透射区射向荧光轮的不同区域(如荧光区和反射区)。在一具体实施中，激光器向各个转折镜片发光的时序也可以与荧光轮中荧光区与反射区的切换时序无关，本申请实施例不做限定。
本申请技术方案还提供了一种激光投影设备，如图8所示的超短焦激光投影设备示意图，该投影设备斜向上投射至光学屏幕进行成像，投影设备距离光学屏幕所在的平面距离较近，可以较小的投射比实现大尺寸的投影显示。
以及，图7示出了一种激光投影设备的投影光路示意图。如图7所示，光源组件100输出的光束入射至光机200中，光机200再将光束入射至镜头300。
光源组件100还包括多个光学镜片，对激光光束和荧光光束进行合光和会聚。
从光源组件100出射的光束入射至光机200，通常匀化部件，比如光导管位于光机200的前端，用于接收光源的照明光束，具有混光和匀化的作用，且光导管的出口为矩形，对光斑具有整形效果。光机200中还包括多片透镜组，TIR或RTIR棱镜用于形成照明光路，将光束入射至核心关键器件-光阀，光阀调制光束后入射镜头300的透镜组中进行成像。
根据投影架构的不同，光阀可以包括很多种，比如LCOS，LCD或者DMD，在本示例中，应用DLP(Digital Light Processing)投影架构，光阀为DMD芯片或称数字微镜阵列。在光源100的光束达到光阀DMD之前，还会经过光机照明光路的整形，使照明光束符合DMD所要求的照明尺寸和入射角度。DMD表面包括成千上万个微小反射镜，每个小反射镜可单独受驱动进行偏转，比如TI提供的DMD芯片中，可进行正负12度或者正负17度的偏转。其中，正的偏转角度反射出的光，称之为ON光，负的偏转角度反射出的光，称之为OFF光，OFF光为无效光，通常打到壳体上或者设置吸光装置吸收掉。ON光是DMD光阀表面的微小反射镜接收照明光束照射，并通过正的偏转角度射入镜头300的有效光束，用于投影成像。光源组件100出射的照明光束的质量直接影响了照射到光阀DMD表面的光束质量，从而经过镜头300投影成像后反映到投影画面上。
在本示例中，镜头300为超短焦投影镜头，经光阀调制后的光束进入镜头最终是沿着斜向上出射的，这有别于传统的长焦投影中投影光束光轴位于投影画面中垂线的出光方式，超短焦投影镜头相对于投影画面通常具有120％～150％的偏移量，这种投射方式具有较小的投射比(可理解为投影主机距离投影屏幕的距离与投影画面对角线的尺寸的比值)，比如0.2左右甚至更小，能够使得投影设备与投影屏幕距离较近，从而适合于家用，但这种出光方式也决定了光束具有较高的均匀性，否则，相比于传统的长焦投影，投影画面的亮度或色度不均匀性会更为明显。
在本示例中，当采用一个DMD光阀部件时，光源100可以时序性输出三基色，根据三色混光原理，人眼是分辨不到某一时刻光的颜色的，感知到的仍然是混合的白光。而当应用多片光阀部件，比如三个DMD，或者三片式LCD液晶光阀，光源100中的三色基色光可同时点亮输出白光。
本申请实施例提供的投影设备由于应用上述多个实施例中的光源组件，上述光源组件取消了蓝光回路，以较少的光学镜片和紧凑的光学架构实现至少三色光的输出，在上述光源组件小型化的基础上，也利于实现激光投影设备光学引擎结构的小型化，并且还可以为投影设备内的其他结构的排布带来便利，比如该其他结构可以包括散热结构或电路板。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。本申请中术语“A和B的至少一种”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如， A和B的至少一种，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。术语“A、B和C的至少一种”表示可以存在七种关系，可以表示：单独存在A，单独存在B，单独存在C，同时存在A和B，同时存在A和C，同时存在C和B，同时存在A、B和C这七种情况。在本申请实施例中，术语“第一”和“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (14)

  1. 一种光源组件，其特征在于，包括：
    第一发光组件，用于发出第一束激光和第二束激光；
    第二发光组件，用于发出第三束激光，所述第三束激光的颜色不同于所述第一束激光和所述第二束激光；
    荧光轮，设置有荧光区和反射区；
    会聚镜组，用于将所述第一束激光和所述第二束激光会聚入射所述荧光轮；
    合光镜片，设置于所述第一发光组件、所述第二发光组件和所述荧光轮之间，其中，所述第三束光透射通过所述合光镜片射向光源组件的出光口方向，所述合光镜片具有多个反射区和至少一个透射区，
    所述第一束光和第二束光分别透射通过所述合光镜片的不同透射区射向所述荧光轮，所述荧光区能够受激分别产生第一荧光和第二荧光；所述第一荧光和所述第二荧光均被所述荧光轮反射后入射所述合光镜片的不同反射区，并分别被所述合光镜片的不同反射区反射向光源组件的出光口方向；
    所述第一束激光和所述第二束激光还能够被所述荧光轮的反射区反射后，入射至所述合光镜片的不同反射区，并分别被所述合光镜片的不同反射区反射向光源组件的出光口方向。
  2. 根据权利要求1所述的光源组件，其特征在于，所述第一发光组件的出光方向上设置有转折镜片，所述转折镜片用于将所述第一发光组件发出的激光光束分离形成所述第一束激光和所述第二束激光。
  3. 根据权利要求2所述的光源组件，其特征在于，所述转折镜片为多个，且每个所述转折镜片距离所述第一发光组件的出光面的距离不同。
  4. 根据权利要求1所述的光源组件，其特征在于，所述合光镜片具有第一反射区、第二反射区和设置于上述两个反射区之间的第二透射区，所述第一束激光和所述第二束激光两者之一从所述第二透射区通过，另一从所述第一反射区或第二反射区的远离所述第二透射区的一侧透过，并均射向所述荧光轮。
  5. 根据权利要求4所述的光源组件，其特征在于，所述合光镜片的第一反射区和第二反射区均能够透过红光且至少反射绿光波段和蓝光波段。
  6. 根据权利要求4所述的光源组件，其特征在于，
    所述合光镜片还具有第一透射区，所述第一透射区和所述第二透射区之间设置有所述第二反射区。
  7. 根据权利要求6所述的光源组件，其特征在于，所述合光镜片倾斜于所述荧光轮的轮面设置，所述第一透射区位于所述合光镜片远离所述荧光轮的一端，所述第一反射区位于所述合光镜片靠近所述荧光轮的一端。
  8. 根据权利要求6所述的光源组件，其特征在于，至少所述合光镜片的第一透射区和第二透射区设置有增透膜；
    和/或，至少所述合光镜片的透射区设置有二向色膜，所述二向色膜用于透蓝光和红光，反射黄光和绿光中至少一种光。
  9. 根据权利要求1所述的光源组件，其特征在于，所述第一束激光和所述第二束激光入射至所述会聚镜组上的镜面位置和在所述荧光轮上的会聚位置各自的连线，与所述会聚镜组的光轴所成的夹角不同。
  10. 根据权利要求1所述的光源组件，其特征在于，所述第一束激光和第二束激光入射至所述会聚镜组镜面的位置到所述会聚镜组的光轴的距离不同。
  11. 根据权利要求1所述的光源组件，其特征在于，所述第一束激光和第二束激光分布于所述会聚镜组光轴的两侧且不关于所述会聚镜组的光轴对称。
  12. 根据权利要求1所述的光源组件，其特征在于，所述光源组件还包括缩束镜组，用于缩小从所述第一发光组件发出的所述第一束激光和第二束激光的光斑，以及，所述缩束镜组与所述会聚镜组的光轴重合。
  13. 根据权利要求1至12任一所述的光源组件，其特征在于，所述第一束激光和所述第二束激光的波段具有重叠。
  14. 一种投影设备，其特征在于，所述投影设备包括：权利要求1至13任一所述的光源组件，以及光机和镜头；
    所述光源组件用于向所述光机发出照明光束，所述光机用于将所述光源组件发出的照明光束进行调制，并投射至所述镜头，所述镜头用于将经所述光机调制的光光束进行成像。
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