WO2021185084A1 - 激光光源及激光投影设备 - Google Patents

激光光源及激光投影设备 Download PDF

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Publication number
WO2021185084A1
WO2021185084A1 PCT/CN2021/078939 CN2021078939W WO2021185084A1 WO 2021185084 A1 WO2021185084 A1 WO 2021185084A1 CN 2021078939 W CN2021078939 W CN 2021078939W WO 2021185084 A1 WO2021185084 A1 WO 2021185084A1
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WIPO (PCT)
Prior art keywords
laser
light
group
reflector
lasers
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Application number
PCT/CN2021/078939
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English (en)
French (fr)
Inventor
石龙飞
王强
Original Assignee
青岛海信激光显示股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202010203438.5A external-priority patent/CN111258164B/zh
Priority claimed from CN202010202705.7A external-priority patent/CN113495416B/zh
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Priority to CN202180022510.7A priority Critical patent/CN115315660A/zh
Publication of WO2021185084A1 publication Critical patent/WO2021185084A1/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

Definitions

  • This application relates to the field of laser projection technology, and in particular to a laser light source and laser projection equipment.
  • the laser projection equipment uses a laser light source, which can include lasers of one color or multiple colors. Industrial applications require at least 1W of laser power, such as a green laser, but its cost is relatively high. When multiple lasers are used, the volume of the laser arrangement and combination is relatively large. Therefore, usually a laser light source uses a blue laser as a blue light source and excites a wavelength conversion device, such as a fluorescent wheel, to generate other primary colors besides blue light.
  • a laser light source uses a blue laser as a blue light source and excites a wavelength conversion device, such as a fluorescent wheel, to generate other primary colors besides blue light.
  • the beam shaping component of the laser beam includes a telescope group.
  • the beams of multiple lasers need to be incident on the light-incident surface of the telescope group.
  • the size of a lens may be very large to meet the light collection requirements.
  • multiple lasers must be arranged reasonably to reduce the difficulty of receiving light and reduce the volume of the light source.
  • the emitted lights of the multiple laser components are not completely parallel.
  • the multiple laser components include at least one first laser component.
  • the light surface, and the output lights of the multiple laser components are directed to different positions of the light incident surface of the telescope group to achieve light combining.
  • the embodiment of the present application also provides a laser projection device, and the technical solution is as follows:
  • the light source part used to provide the illuminating beam
  • the opto-mechanical part used to modulate the illuminating beam
  • the lens part used to image the modulated illuminating beam on the projection screen
  • the light source part includes a plurality of laser components, a telescope group, and a mirror group assembled in the housing;
  • a plurality of laser components are installed on the mutually perpendicular sides of the housing;
  • Each group of lasers located on mutually perpendicular sides includes multiple lasers with different arrangement directions; part of the beams emitted by the multiple laser components are reflected to the light incident surface of the telescope group through the mirror group, and the multiple laser components output At least part of the other light beams avoid the mirror group and directly enter the light-incident surface of the telescope group.
  • FIG. 1 is a schematic structural diagram of a laser projection device provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the structure of the optical engine part of the laser projection device in FIG. 1;
  • Figure 3-1 is a schematic bottom view of a light source part provided by an embodiment of the present application.
  • 3-2 is a schematic top view of a light source part provided by an embodiment of the present application.
  • 3-3 is a schematic diagram of the light path of a light source part provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of the light path of a light source provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of the structure of a light source part provided by an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of a light source housing provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a laser installation structure provided by an embodiment of the present application.
  • FIG. 8 is an exploded view of the laser component of the light source part provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a first laser assembly shown in FIG. 7;
  • Fig. 10 is a top view of the first laser assembly shown in Fig. 7;
  • FIG. 11 is a schematic structural diagram of another first laser assembly shown in FIG. 7;
  • Fig. 12-1 is a schematic diagram of an exploded structure of the second laser assembly shown in Fig. 7;
  • Fig. 12-2 is a schematic diagram of a plan structure of the second laser assembly shown in Fig. 7;
  • Fig. 13 is a right side view of part of the optical path of the second laser assembly in the schematic diagram of the optical path shown in Fig. 4;
  • Fig. 14 is a top view of two lasers of the third laser assembly shown in Fig. 4;
  • 15 is a schematic diagram of the structure of any laser in an embodiment of the present application.
  • FIG. 16-1 is a schematic diagram of the structure of the fluorescent assembly and the housing provided by an embodiment of the present application.
  • Figure 16-2 is a schematic diagram of a fluorescent wheel structure provided by an embodiment of the present application.
  • FIG. 17 is an exploded view of the structure of a laser projection device provided by an embodiment of the present application.
  • the embodiment of the present application provides a laser projection device, as shown in FIG. 1, including an optical engine part composed of a light source part 10, an optical machine part 20, and a lens part 30, and a heat dissipation system 40 arranged outside the optical engine part,
  • the heat dissipation system 40 is used to dissipate heat for the optical engine part and the circuit system (not shown in the figure) of the projection device, and to maintain the normal working temperature of the laser projection device.
  • FIG. 17 it is a schematic diagram of the split structure of a laser projection device provided in FIG. 1 of the embodiment of the application.
  • the light source part 10 is connected to the optical machine part 20, and the optical machine part 20 is connected to the lens part 30.
  • the light source part 10 is used to provide an illuminating light beam to the optical machine part 20.
  • the light source part 10 includes a laser light source and a fluorescent component.
  • the light source part 10 emits a white light beam as an illuminating beam and is provided to the optical machine part 20.
  • the white light beam may be three primary colors outputted sequentially. Mix and form.
  • the illuminating light beam is processed by the illuminating light path and irradiated to the surface of the light valve after meeting the preset size and angle of incidence.
  • the light valve is driven by the driving signal corresponding to the image display signal to complete the modulation of the incident light beam, and The modulated light beam is reflected out and projected into the lens part 30.
  • the lens part 30 is used to magnify and image the received projection light beam on the projection screen.
  • the lens part 30 is an ultra short throw projection lens
  • the laser projection device in this embodiment is an ultra short throw laser projection device.
  • FIG. 2 is a schematic diagram of the structure of the optical engine part of the laser projection device in FIG. 1.
  • the optical engine part includes the light source part 10, the optical machine part 20 and the lens part 30.
  • the light source part 10 includes a plurality of laser components and a fluorescent wheel component.
  • the optical machine part 20 and the lens part 30 are arranged side by side with the light source part 10.
  • FIG. 3-1 is a schematic diagram of the bottom surface structure of the light source provided by the embodiment of the present application.
  • the light source part includes a plurality of laser components 12 and fluorescent components 15. Wherein, the multiple laser components may all be blue lasers.
  • a plurality of laser components are respectively arranged on different sides of the light source housing, and the different sides are adjacent sides that are perpendicular to each other.
  • the plurality of laser components include a first laser group 121, The second laser group 122 and the third laser group 123.
  • each laser group includes two lasers, and the lasers are MCL lasers.
  • Figure 3-2 is a schematic top view of the light source part provided by this embodiment.
  • Fig. 3-3 is a schematic diagram of the optical path in the light source part shown in Fig. 3-2 in this embodiment.
  • the second laser group 122 and the third laser group 123 are arranged on one side surface of the light source housing, and the first laser group 121 is arranged on the other side surface of the light source housing, and the other side surface is perpendicular to the aforementioned one side surface.
  • the light beams emitted by the first laser group 121 and the second laser group 122 and the light beams emitted by the third laser group 123 are also in a vertical relationship.
  • the third laser group 123 transmits in the direction of emission.
  • the lasers output by the three laser groups are combined and shaped by the beam shaping light path, and are incident on the fluorescent wheel 150 in the fluorescent assembly 15, which is provided with a fluorescent area 1504, Usually the circumference is distributed on the disc surface of the fluorescent wheel, which can be excited to emit different colors of fluorescence.
  • Figure 16-2 shows a fluorescent wheel structure.
  • the fluorescent wheel 150 includes a drive connector 1501 for supplying power.
  • the disk surface of the fluorescent wheel is also provided with a transmission area 1503, which is used to transmit blue laser light.
  • the blue laser passes through the turning mirror group on the back of the fluorescent wheel 150. Return to the front of the fluorescent wheel 150, combine light with different colors of fluorescent light, and the combined laser light and fluorescent light are output from the light source outlet 151.
  • FIG. 4 is a schematic diagram of the optical path principle of the light source part provided by an embodiment of the application. Specifically, the emitted light of the first laser assembly 121 is directed toward the first reflecting mirror 141, and the emitted light of the third laser assembly 123 is directed toward the second reflecting mirror 142, and is reflected toward the first reflecting mirror 141 and the first reflecting mirror 141.
  • the mirror 141 directly enters the telescope group 13, and the first laser assembly 121 and the second reflector 142 are arranged in a staggered arrangement so that the emitted light of at least one laser in the first laser assembly 121 does not pass through the second reflector 142 but directly enters the first laser assembly.
  • a reflector 141, the two lasers 12a in the first laser assembly 121 and the third laser assembly 123 are arranged horizontally, the two lasers 12a in the second laser assembly 122 are arranged longitudinally, and the telescope group 13 arranges a plurality of laser assemblies 12
  • the emitted light (not shown in FIG. 4) is directed to the fluorescent assembly 15, and the fluorescent assembly 15 can be used to convert the incident light into light of various primary colors (for example, red light, green light, and blue light).
  • each laser assembly includes two lasers. As shown in FIG. 13, which is a right side view of part of the optical path of the second laser assembly in the schematic diagram of the optical path shown in FIG.
  • the optical paths of the two lasers in the second laser assembly 122 are located on both sides of the first reflecting mirror 141. That is, the width of the first reflector 141 along the line connecting the two lasers in the second laser assembly 122 is smaller than the width between the lasers emitted by the two lasers, and is greater than the width of the laser emitted by any laser. In order to reflect the laser light emitted by the laser, for example, the width may be about 16 mm.
  • the second reflecting mirror 142 includes two sub-reflecting mirrors 1421 and 1422, and the two sub-reflecting mirrors are located on the optical paths of the two lasers of the third laser assembly 123 in a one-to-one correspondence.
  • the optical paths of the two lasers in the first laser assembly 121 are respectively located on both sides of one of the two sub-mirrors in the second mirror 142.
  • each laser includes a rectangular light-emitting surface, the light-emitting surface has a laser output hole h, and two opposite sides of the rectangular light-emitting surface have driving leads (which may include a positive electrode lead p and a negative electrode lead n).
  • driving leads which may include a positive electrode lead p and a negative electrode lead n.
  • one side a of one laser 12a without a driving lead is separated from a side b of the other laser 12a without a driving lead 0-10 Mm. That is, the two sides abut or are separated by a small distance.
  • the two lasers are in close contact, which can reduce the volume of the laser assembly, and the gap between the spots emitted by the group of lasers is also small, which is conducive to reducing the volume of the light source part and reducing the difficulty of combining light. This is because the light is combined.
  • the light beams in various directions need to be converged into one direction by turning the light path.
  • the structure of the first laser assembly is similar to that of the third laser assembly.
  • one side of one laser without a driving lead is abutting or separated from the side of the other laser without a driving lead. A smaller spacing.
  • the plurality of laser assemblies 12 further includes at least one second laser assembly 122, and each second laser assembly 122 is located in the housing 11 at a position facing the light incident surface of the telescope group 13.
  • FIG. 3-3 shows a case where multiple laser assemblies 12 include one second laser assembly 122, but the embodiment of the present application does not limit this.
  • the light incident surface of the telescope group 13 is the side that receives the light emitted by the multiple laser components 12, and each second laser component 122 is located in the housing 11 at a position facing the light incident surface of the telescope group 13, so that each second laser component The light emitted from 122 can directly enter the light incident surface of the telescope group 13.
  • the telescope assembly 13 can receive the emitted light of multiple laser assemblies when the lens aperture of the telescope assembly 13 is small, so as to avoid the situation that the telescope assembly 13 has a large aperture and cannot be processed.
  • the lens diameter of the telescope group 13 is small, so that the volume of the light source part including the telescope group 13 is small.
  • the reflector group 14 (not shown in FIG. 4) includes a first reflector 141, and the first reflector 141 is located on the optical axis of the telescope group 13.
  • the optical axis is the symmetry axis of the optical path of the incident light incident on the light incident surface of the telescope group 13.
  • the emitted light of the at least one second laser component 122 directly enters the light incident surface of the telescope group 13 without passing through the first reflecting mirror 141.
  • each first laser assembly 121 is directed toward the first reflector 141 and is reflected by the first reflector 141 toward the light incident surface of the telescope group 13.
  • the mirror group 14 further includes a second mirror 142.
  • each first laser component 121 does not pass through the second reflector 142 but directly enters the light incident surface of the first reflector 141.
  • the multiple laser assemblies 12 further include at least one third laser assembly 123 (FIG. 3-3 shows the case where the multiple laser assemblies 12 include one third laser assembly 123, but the embodiment of the present application does not limit this),
  • the emitted light of each third laser assembly 123 is directed to the second reflector 142 and is reflected by the second reflector 142 to the first reflector 141, and then is reflected by the first reflector 141 to the light incident surface of the telescope group 13.
  • At least one first laser assembly 121 may be arranged on one side of the telescope group 13, and at least one second laser assembly 122 and at least one third laser assembly 123 may be arranged on the other side of the telescope group 13.
  • the light incident surface for receiving the parallel light emitted by multiple laser components is small, which avoids that the multiple laser components are arranged side by side to cause the large light incident surface for receiving the parallel light emitted by the multiple laser components, and the volume of the light source part is relatively small. Big problem.
  • Fig. 6 is a schematic structural diagram of a light source part provided by an embodiment of the present application. It can be seen with reference to FIG. 6 that the light source part 10 may include:
  • the casing 11 and a plurality of laser components 12 (FIG. 6 is a disassembled view, not shown with reference numerals) assembled on the casing 11, a telescope group 13 and a mirror group 14.
  • a plurality of laser components are installed at different positions of the housing 11, and the emitted lights of the plurality of laser components are not completely parallel.
  • the plurality of laser components include at least one first laser component 121, and the emitted light of each first laser component 121 is directed and reflected
  • the mirror group 14 and the reflecting mirror group 14 reflect light toward the light incident surface of the telescope group 13.
  • the telescope assembly 13 can convert the output lights of multiple lasers into parallel light and perform beam reduction (exemplarily, the telescope assembly 13 can include a convex lens and a concave lens, the convex lens is close to the multiple laser components, and the concave lens is located far away from the convex lens.
  • the convex lens can be used to shrink the light directed to the telescope group 13, and then direct the reduced light to the concave lens, so that the reduced light diverges into parallel beams).
  • multiple lasers in the light source part are arranged side by side and face the light incident surface of the telescope group.
  • the light emitted by the multiple lasers is incident on the light incident surface of the telescope group in parallel, and then enters the fluorescent assembly after being adjusted by the telescope group.
  • the light incident surface of the light source part that receives the parallel light emitted by the multiple lasers is relatively large, which in turn causes the size of the entire light source part to be relatively large.
  • the laser is a laser array light source, which emits laser beams in the same direction. Because multiple light sources in the laser are arranged side by side, the diameter of the incident surface of the telescope component receiving the laser beam from the laser is large, and the large diameter will cause the telescope The edge thickness of the lens of the module is too thin, which makes it difficult to process the telescope module.
  • the light source part includes a plurality of laser components, specifically, it includes three groups of lasers, a total of 6 laser components, and the first laser group 121 is provided in one of the light source housings.
  • a second laser group 122 and a third laser group 123 are provided on the other vertical side adjacent to the side surface, wherein the installation of the two lasers included in each of the second laser group 122 and the third laser group 123 The way is different.
  • the light beam emitted by the first laser group 121 passes through the interval of the second reflection mirror 142 and is incident on the first reflection mirror 141, and the light beam emitted by the third laser group 123 is incident on the reflection mirror 142 and is reflected to the first reflection mirror 141.
  • the light beams of the two laser groups are superimposed on the first reflecting mirror 141.
  • the second group of lasers 122 is perpendicular to the arrangement direction of the third group of lasers 123, as shown in Fig. 12-1 and Fig. 12-2. Taking the arrangement direction of the two lasers of the third group of lasers 123 as the horizontal direction, the second group The two lasers of the group of lasers 122 are longitudinal, as shown in Fig. 12-2, there is a gap D1 between the two longitudinally arranged lasers, which makes the light beams emitted by the two lasers in the second group of lasers 122 also have a gap. The gap can avoid the first reflector 141, so that it can directly enter the first lens of the telescope group.
  • the light beam reflected by the first mirror 141 and the light beam of the second group laser 122 directly incident on the first lens of the telescope group are respectively irradiated on different positions of the first lens, and the area of the first lens can be fully utilized.
  • the light spots on the first lens tend to be uniform and symmetric, which can improve the light utilization efficiency of the lens.
  • the light beams emitted by the multiple laser components are combined and reduced by the telescope group, and can be further diffused by the diffuser, and converged by the collimating lens group located on the front of the fluorescent wheel, and then incident on the front of the fluorescent wheel.
  • the multiple laser components include three groups of lasers, and each group of lasers includes two lasers as an example.
  • the multiple laser components include the first laser component 121 and the second laser component 121
  • the above-mentioned inventive idea is also applicable.
  • the laser assembly 121 and the second laser assembly 122 are arranged on the sides of the light source housing that are perpendicular to each other.
  • Both the first laser assembly 121 and the second laser assembly 122 include multiple lasers. Two lasers are used as an example. The arrangement directions of the two lasers are different.
  • the first laser assembly 121 can be arranged along the side of the housing in a direction parallel to the bottom surface of the light source, and the second laser assembly 122 can be arranged along the side of the housing where it is perpendicular to the bottom surface of the light source. The direction is arranged.
  • part of the light beams emitted by the multiple laser components such as the part of the light beams emitted by the first laser component 121 in this example, is reflected to the light incident surface of the telescope group by the first reflector, and at least part of the other light beams output by the multiple laser components
  • the light beam of the second laser component 122 directly enters the light incident surface of the telescope group by avoiding the first reflector, so that the light beams of the two laser groups are incident on different areas on the first lens of the telescope group.
  • the symmetry of the optical axis is also improved.
  • the light source part includes a housing and a plurality of laser components, a telescope group, and a mirror group assembled in the housing, and the multiple laser components are installed on different sides of the housing. Specifically, on two sides perpendicular to each other, among the multiple laser components, the laser components on different sides of the housing can combine light by reflection and transmission, and the combined light beam passes through the light combining mirror.
  • the lens needs to meet the size of the spot length in the diameter, because the lens is usually processed into a circle, and the increase in the size in any one direction will result in the entire circle.
  • the increase of the shape area is because when the light beam illuminates the lens in a single direction, such as a long strip of spot, the lens needs to meet the size of the spot length in the diameter, because the lens is usually processed into a circle, and the increase in the size in any one direction will result in the entire circle. The increase of the shape area.
  • the light source part 10 includes a housing 11, a plurality of laser components 12, a telescope group 13, and a mirror group 14 assembled on the housing 11, and each laser component 12 includes two lasers, And the two lasers in each laser assembly are fixed on the fixed housing, and the laser assembly 12 is fixed on the housing 11 through the fixed housing. There is a sealing glass between the laser assembly 12 and the housing 11 and two sealing glass located therebetween. On the side of the sealing rubber, the mirror group 14 is fixed on the bottom plate 111 of the housing 11.
  • the multiple laser components 12 include a first laser component 121, a second laser component 122, and a third laser component 123.
  • the mirror group 14 includes a first mirror 141 and a second mirror 142. The outgoing light is directed to the first reflecting mirror 141, and the outgoing light of the third laser assembly 123 is directed to the second reflecting mirror 142, and is reflected by the second reflecting mirror 142 to the first reflecting mirror 141.
  • the first reflecting mirror 141 transmits the first laser
  • the emitted light of the component 121 and the third laser component 122 is directed toward the telescope group 13, the second laser component 122 is directly facing the light incident surface of the telescope group 13, and the output light of the second laser component 122 directly enters the telescope group 13, the telescope group 13
  • the emitted light of the plurality of laser components 12 is injected into the fluorescent component 15, and the fluorescent component 15 converts the emitted light of the telescope component 13 into various primary colors of light, and emits the various primary colors of light out of the light source part.
  • FIG. 5 it is a schematic diagram of the structure of the housing in the light source part 10 shown in FIG. 3-1, which is a view from the bottom surface.
  • the housing 11 includes a bottom plate 111 and a shell wall 112 standing on the bottom plate 111.
  • the reflector group 14 is installed on the bottom plate 111, and a plurality of laser components 12 (not shown in FIG. 5) are installed on the shell wall 112.
  • the reflector group 14 is installed on the bottom plate 111 to facilitate the adjustment of the reflector group 14 after the light source part 10 is packaged, so as to obtain the required output light of multiple laser components.
  • the housing wall 112 includes a first sub-housing wall 1121 and a second sub-housing wall 1122 that are perpendicular to each other, and the plane of the first sub-housing wall 1121 is parallel to the light incident surface of the telescope group 13.
  • the first laser assembly is installed on the second sub-housing wall 1122, and the second laser assembly and the third laser assembly are installed on the first sub-housing wall 1121.
  • the shell wall 112 has a plurality of openings a corresponding to the plurality of laser components 12 one-to-one, and the plurality of laser components 12 are installed outside the shell wall 112, and the light emitting direction corresponds to the direction one-to-one. Multiple openings a.
  • each laser assembly 12 includes two lasers 12a.
  • the two lasers 12a in the first laser assembly 121 and the two lasers 12a in the third laser assembly 123 are both arranged in a direction parallel to the bottom plate, and the two lasers in the second laser assembly 122 12a is arranged in a direction perpendicular to the bottom plate.
  • Each laser assembly 12 includes at least one laser 12a and at least one sealing structure 12b (FIG. 8 shows the case where each laser assembly 12 includes two lasers 12a and one sealing structure 12b, which is not limited in the embodiment of the present application. ), each laser 12a is installed outside the shell wall 112 through the sealing structure 12b, and the light emitting direction of each laser 12a faces a plurality of openings a (not shown in FIG. 8) in a one-to-one correspondence.
  • the sealing structure 12b includes a sealing glass b and a sealing rubber c on both sides of the sealing glass b.
  • the laser assembly is installed on the shell wall of the shell by using the sealing structure 12b.
  • the emitted light of the laser assembly passes through the sealing glass and enters the shell of the light source part, which can maintain the high brightness of the laser in the light source part and ease the brightness of the laser. Attenuation to ensure the air tightness in the shell of the light source part.
  • FIG. 9 it is a schematic structural diagram of the first laser assembly 121 shown in FIG. 3-3, and this structure can also be applied to the third laser assembly 123.
  • At least one laser 12a in the first laser assembly 121 can be fixed on a fixed housing 121a through the sealing structure 12b, and then the fixed housing 121a can be installed outside the housing wall 112 (not shown in FIG. 9).
  • the arrangement of at least one laser 12a in the first laser assembly 121 is relatively compact.
  • the interval between the emitted lights of the laser 12a is also small.
  • FIG. 10 is a top view of the first laser assembly 121 shown in FIG. 9.
  • the first laser assembly 121 is installed on the shell wall (not shown in FIG. 10) through a fixed shell 121a, and the power supply printed circuit board 121b corresponding to each laser (not shown in FIG. 10) is located on different sides of the laser assembly.
  • the distance between the lasers constituting the first laser assembly 121 is reduced, so that the structure of the first laser assembly 121 is more compact, thereby further reducing the volume of the light source part.
  • FIG. 11 is a schematic structural diagram of another first laser assembly 121 shown in FIG. 3-3.
  • the first laser assembly 121 in FIG. 11 includes a fixed housing 121a, at least one laser 12a, a power supply printed circuit board 121b corresponding to each laser 12a, and a power supply printed circuit board 121b corresponding to each laser 12a.
  • the heat dissipation component 121c may be fixed on the upper part of the at least one laser 12a by a fixing screw, so as to dissipate heat of the at least one laser 12a when the at least one laser 12a is working.
  • Fig. 12-1 is a schematic diagram of the exploded structure of the second laser assembly 122 shown in Fig. 3-3.
  • the power supply printed circuit board 122b is located on opposite sides of the laser 12a, and the second laser assembly 122 is fixed on the fixed housing 122a.
  • the body 122a is installed outside the shell wall 112 (not shown in FIG. 12-1). This structure can further reduce the distance between at least one laser 12a in each second laser assembly 122, thereby further reducing the volume of the light source part.
  • the housing 11 includes a light-emitting hole 113, and the light emitted from the telescope group 13 is emitted from the light-emitting hole 113.
  • the light source part 10 shown in FIG. 3-1 further includes a fluorescent component 15, and the light entrance hole of the fluorescent component 15 is connected to the light exit hole of the housing 11.
  • the fluorescent assembly 15 can convert the emitted light of the telescope group 13 into various primary colors (for example, red light, green light), and then emit the various primary colors from the light outlet of the light source.
  • various primary colors for example, red light, green light
  • FIG. 16-1 is a schematic diagram of the structure of the fluorescent assembly 15 and the housing 11 shown in FIG. 3-1
  • a sealing rubber c can be added between the light entrance hole 151 and the light exit hole 113 for connection. , The sealing performance of the light source part 10 can be further improved.
  • FIG. 8 is a schematic structural diagram of another first laser assembly 121 shown in FIG. 3-1.
  • the reflector group (not shown in FIG. 8) is installed on the bottom plate 111 through an adjustment component 114, which can adjust the lenses in the reflector group so that the reflected light of the reflector group meets the design requirements.
  • the adjustment component 114 is used to facilitate the adjustment of the reflector group after the packaging of the light source part 10 is completed, so that the light emitted from the light source part 10 meets the design requirements.
  • the light source part can achieve 400 watts (watt, w) optical power output, and the output luminous flux is greater than 8000 lumens (lumen, lm). Compared with related technologies, it can reduce the volume of the light source part. Realize high brightness output on the basis of. Moreover, the arrangement of the multiple laser components in the embodiment of the present application is relatively compact, the diameter of the spot formed by the laser is small, and the convex lens in the telescope group 13 is small, so that the overall volume of the light source part 10 is small.
  • the excitation power of the fluorescent assembly 15 increases accordingly, and more heat is generated accordingly.
  • the temperature of the fluorescent wheel has a great influence on the fluorescent conversion efficiency, which restricts the fluorescent light power. major factor.
  • the diameter of the fluorescent wheel 150 in the fluorescent assembly 15 can be correspondingly increased compared to the traditional 65mm size, for example, to 92mm.
  • the main purpose of increasing the size of the fluorescent wheel 150 is to accelerate Heat dissipation.
  • the disc surface of the fluorescent wheel 150 is further provided with heat dissipation fins 1502, and the heat dissipation fin area does not overlap with the transmission area 1503 and the fluorescent area 1504, and can be configured as a structure protruding from the disc surface.
  • the convex structure of the radiating fin 1502 is equivalent to a fan blade, which can drive the air flow, accelerate the air flow velocity on the surface of the disk surface, quickly remove heat, and reduce the temperature of the fluorescent wheel surface.
  • the laser may be a multi-chip laser (Multi Chip LD, MCL), and each MCL may include multiple light-emitting units c and light-emitting units.
  • MCL multi-chip laser
  • the rectangular heat dissipation substrate d has driving leads q on the left and right sides in FIG. 4, which can supply power to the light-emitting unit c; the heat dissipation substrate d does not have fixing holes k on both sides of the driving leads.
  • a plurality of light emitting units c are arranged in a matrix in the middle of the heat dissipation base d, and are arranged symmetrically with the two axes of the heat dissipation base respectively.
  • the width of the matrix light beams emitted by the plurality of light-emitting units in the direction f on the two sides without the driving lead is not more than 1/2 of the width of the heat dissipation substrate in the direction f. In this way, there is a certain distance between the matrix beams emitted by two adjacent lasers, which can facilitate the setting of the optical path as shown in FIG. 4.
  • the light source part provided by the embodiment of the present application inputs the rays of multiple lasers into the telescope group through spatial light combining. Compared with the polarization combining light through the polarizer, not only the cost is lower, but the light combining efficiency is also obtained. promote.
  • the light source part provided by the embodiment of the present application combines light through three independent mirrors. Compared with the scheme of combining light through half mirrors, the cost is lower, the transmission loss is reduced, and the light combining efficiency is reduced. The improvement.
  • the brightness of the light source of the laser projection device is relatively high, which increases the conversion heat of the light source part itself, and at the same time, the propagation of the high-energy beam also accelerates the heat accumulation of the entire system.
  • the laser projection equipment further includes a heat dissipation system 40.
  • the heat dissipation system 40 may be a liquid-cooled heat dissipation system, and the liquid-cooled heat dissipation system includes a cold head. Ducts, cold exhaust and fans.
  • the laser is the core heat source in the entire device. When the laser adopts an MCL type laser, its back is relatively flat and a cold head can be provided. As shown in FIG. 11, the heat dissipation component 121c can be specifically a cold head. In the same way, the lasers of other groups are also equipped with cold heads.
  • the cold head flows the cooling liquid carrying heat to the cold row through the pipe.
  • a fan is installed at the cold row. After cooling, it flows out from the outlet of the cold exhaust, and then returns to the cold head to circulate.
  • the embodiment of the present application provides a laser projection device, which can provide a higher brightness projection image and can take into account the light effect and volume of the optical engine part.
  • the light source part includes multiple laser components, a telescope group, a mirror group, and a fluorescent component.
  • the laser components on different sides of the housing can combine light by reflection and transmission.
  • the combined light beam is reflected again by the combining mirror, and the laser components of other groups are arranged through gaps.
  • the arrangement direction of the lasers in this group is different from the arrangement of multiple lasers in the aforementioned laser group, which can make the lasers have gaps between them.
  • the size of a certain dimension of the optical component needs to be increased when the optical component is incident in a single direction, which leads to a large increase in the size of the entire circular lens, and a reduction in the utilization rate of the lens processing area, which is also greatly reduced.
  • the cost of lens processing it is avoided that the size of a certain dimension of the optical component needs to be increased when the optical component is incident in a single direction, which leads to a large increase in the size of the entire circular lens, and a reduction in the utilization rate of the lens processing area, which is also greatly reduced.
  • the fluorescent wheel of the fluorescent assembly adopts a large-diameter fluorescent wheel, and the fluorescent wheel itself is provided with heat dissipation fins, which can increase the heat dissipation efficiency of the fluorescent wheel and ensure that the fluorescent conversion efficiency is improved under high-power excitation. stability.
  • the light output efficiency of the laser is also affected by temperature, and different lasers have their own suitable temperature ranges.
  • the laser projection equipment is also provided with a heat dissipation system.
  • a liquid cooling system is used to cool the high-heat laser by water. It can ensure that the optical engine part works within a controllable temperature range, and the optical power of the laser and fluorescence can also be relatively stable.
  • the light source part and the lens part are arranged side by side and the distance is relatively close, when the temperature rise of the light source part is controllable, it will also reduce the heat transfer to the lens part, reduce the temperature drift of the lens part, and keep the lens assembly better. Analytical capabilities.
  • the light source part is especially sealed at a higher level to reduce the entry of dust and foreign objects, reduce the problem of brightness drop caused by light decay, and facilitate the stable output of the high-brightness beam.

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Abstract

一种激光光源（10）及激光投影设备。激光光源（10）包括多个激光组件（12）、望远镜组（13）以及反射镜组（14）；多个激光组件（12）的出射光不全平行，多个激光组件（12）包括至少一个第一激光组件（121），每个第一激光组件（121）的出射光射向反射镜组（14），并由反射镜组（14）将光反射向望远镜组（13）的入光面，且多个激光组件（13）的出射光射向望远镜组（13）的入光面的不同位置以实现合光。

Description

激光光源及激光投影设备
相关申请的交叉引用
本申请要求在2020年3月20日提交中国专利局、申请号为202010202705.7，发明名称为光源系统以及投影设备，以及在2020年3月20日提交中国专利局，申请号为202010203438.5，发明名称为激光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
本申请涉及激光投影技术领域，特别涉及一种激光光源及激光投影设备。
背景技术
激光投影设备采用激光光源，可以包含一种颜色或多种颜色的激光器。工业化应用对激光器功率的要求是要至少达到1W以上，比如绿色激光器，但是其成本较高，在应用多颗时，导致激光器排列组合的体积较大。因此，通常激光光源是通过应用蓝色激光器作为蓝光光源，且激发波长转换装置，比如荧光轮，来产生除蓝光之外的其他基色。
当在追求激光投影设备的高流明数输出时，即高亮度的指标时，通常需要采用更多颗的激光器，提高激发功率，进而产生更高亮度的荧光。但是激光器之间具有间隙，导致光斑尺寸很大，带来合束合光的难度，同时对光路中镜片的尺寸也要求更大，从而导致光路系统中设置大的镜片才能满足收光要求。比如，在激光器光束的光束整形组件中包括望远镜组，多个激光器的光束需要正对望远镜组的入光面入射，经望远镜组缩束调整后射入荧光轮中，这就使得望远镜组的第一片镜片的尺寸可能要做的非常大才能满足收光要求。
并且多颗激光器也必须合理排布才能降低收光难度，并且减小光源体积。
因此，在实现高亮度的同时，还需注重激光投影设备的光效和结构合理性。
发明内容
本申请实施例提供了一种光源，技术方案如下：
包括：多个激光组件、望远镜组以及反射镜组；
多个激光组件的出射光不全平行，多个激光组件包括至少一个第一激光组件，每个第一激光组件的出射光射向反射镜组，并由反射镜组将光反射向望远镜组的入光面，且多个激光组件的出射光射向望远镜组的入光面的不同位置以实现合光。
以及，本申请实施例还提供了一种激光投影设备，技术方案如下：
包括：光源部分，用于提供照明光束；光机部分，用于对照明光束进行调制；镜头部分， 用于对调制后的照明光束进行成像于投影屏幕上；
其中，光源部分包括装配于壳体内的多个激光组件、望远镜组以及反射镜组；
多个激光组件安装于壳体的互相垂直的侧面上；
位于互相垂直的侧面上的每组激光器均包括多个激光器，且排列方向不同；多个激光组件组件出射的部分光束通过反射镜组反射至望远镜组的入光面，以及，多个激光组件输出的至少部分其他光束避开反射镜组，直接入射望远镜组的入光面。
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是本申请实施例提供的一种激光投影设备的结构示意图；
图2是图1中激光投影设备的光学引擎部分的结构示意图；
图3-1是本申请实施例提供的一种光源部分的底面示意图；
图3-2是本申请实施例提供的一种光源部分的顶面示意图；
图3-3是本申请实施例提供的一种光源部分的光路示意图；
图4是本申请实施例提供的光源光路原理图；
图5是本申请实施例提供的光源部分的结构示意图；
图6是本申请实施例提供的光源壳体的结构示意图；
图7是本申请实施例提供的激光器安装结构示意图；
图8是本申请实施例提供的光源部分的激光组件的爆炸图；
图9是图7所示一种第一激光组件的结构示意图；
图10是图7所示第一激光组件的俯视图；
图11是图7所示另一种第一激光组件的结构示意图；
图12-1是图7所示第二激光组件的一种分解结构示意图；
图12-2是图7所示第二激光组件的一种平面结构示意图；
图13是图4所示光路示意图中，第二激光组件部分光路的右视图；
图14是图4所示第三激光组件的两个激光器的俯视图；
图15是本申请实施例中任一激光器的结构示意图；
图16-1是本申请实施例提供的荧光组件与壳体的结构示意图；
图16-2是本申请实施例提供的一种荧光轮结构示意图；
图17是本申请实施例提供的一种激光投影设备结构分解图。
通过上述附图，已示出本申请明确的实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
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。
本申请实施例提供了一种激光投影设备，如图1所示，包括由光源部分10、光机部分20、镜头部分30组成的光学引擎部分，以及设置于光学引擎部分外侧的散热系统40，其中散热系统40用于为光学引擎部分以及投影设备的电路系统(图中未示出)散热，保持激光投影设备工作温度的正常。
如图17所示，其为本申请实施例图1提供的一种激光投影设备的拆分结构示意图。
其中，沿着光束的投射方向，光源部分10与光机部分20连接，光机部分20与镜头部分30连接。光源部分10用于提供照明光束给光机部分20，光源部分10包括激光器光源以及荧光组件，光源部分10出射白光光束作为照明光束提供给光机部分20，该白光光束可以是时序输出的三基色混合形成。该照明光束先经过照明光路的处理，符合预设的尺寸和入射角度后照射至光阀的表面，由光阀在对应图像显示信号的驱动信号的驱动下，完成对入射光束的调制，并将调制后的光束反射出去，投射进入镜头部分30中，镜头部分30用于对接收到的投射光束进行放大成像于投影屏幕中。在本示例中，镜头部分30为超短焦投影镜头，本实施例中的激光投影设备为超短焦激光投影设备。
图2是图1中激光投影设备的光学引擎部分的结构示意图。如前所述，光学引擎部分包括光源部分10，光机部分20以及镜头部分30。其中光源部分10包括多个激光组件，以及荧光轮组件。光机部分20和镜头部分30与光源部分10并列设置。
图3-1是本申请实施例提供的光源部分底面结构示意图。光源部分包括多个激光组件12和荧光组件15。其中，该多个激光组件可以均为蓝色激光器。如图7所示的局部放大图中，多个激光组件分别设置于光源壳体的不同侧面，且该不同的侧面为相互垂直的相邻侧面，多个激光组件包括第一激光器组121，第二激光器组122和第三激光器组123，在本示例中，每个激光器组包括两个激光器，该激光器为MCL型激光器。
图3-2为本实施例提供的光源部分的顶面示意图。
图3-3是本实施例中基于图3-2所示出的光源部分中光路走向示意图。具体地，第二激光器组122和第三激光器组123设置于光源壳体的一个侧面，第一激光器组121设置光 源壳体的另一个侧面，该另一个侧面与前述的一个侧面互相垂直。第一激光器组121发出的光束与第二激光器组122，第三激光器组123发出的光束也呈垂直关系，这三路光束经合光后朝向一个方向传输，即沿着第二激光器组122和第三激光器组123所出射的方向传输。
以及，如图3-3所示，三个激光器组输出的激光合束后并经过光束整形光路的整形，入射至荧光组件15中的荧光轮150上，荧光轮150上设置有荧光区1504，通常圆周分布在荧光轮的盘面上，可以受激发发出不同颜色的荧光。图16-2示出了一种荧光轮结构。荧光轮150包括驱动连接件1501，用于提供供电，荧光轮的盘面上还设置有透射区1503，透射区用于透射蓝色激光，蓝色激光经过设置有荧光轮150背面的转折镜组再次返回至荧光轮150的正面，与不同颜色的荧光合光，合光后的激光和荧光从光源出口151处输出。
图4所示为本申请实施例提供的光源部分的光路原理示意图。具体地，第一激光组件121的出射光射向第一反射镜141，第三激光组件123的出射光射向第二反射镜142，并被反射向第一反射镜141，第一反射镜141将第一激光组件121以及第三激光组件123的出射光反射向望远镜组13，第二激光组件122与第一反射镜141错位排布，使得第二激光组件122的出射光不经过第一反射镜141而直射入望远镜组13，第一激光组件121与第二反射镜142错位排布，以使第一激光组件121中的至少一个激光器的出射光不经过第二反射镜142而直射入第一反射镜141，第一激光组件121以及第三激光组件123中的两个激光器12a横向排布，第二激光组件122中的两个激光器12a纵向排布，望远镜组13将多个激光组件12(图4未示出)的出射光射向荧光组件15，荧光组件15可以用于将射入的光转换为各种基色光(例如红光、绿光和蓝光)。
在一种可能的实施方式中，每个激光组件包括两个激光器。如图13所示，其为图4所示光路示意图中，第二激光组件部分光路的右视图。
第二激光组件122中的两个激光器的光路位于第一反射镜141的两侧。也即是，第一反射镜141沿第二激光组件122中的两个激光器连线的方向上的宽度小于这两个激光器出射的激光之间的宽度，并大于任一激光器出射激光的宽度，以便于对激光器出射的激光进行反射，示例性的，该宽度可以为16毫米左右。
如图4所示，第二反射镜142包括两个子反射镜1421，1422，两个子反射镜一一对应的位于第三激光组件123的两个激光器的光路上。
在一种可能的实施方式中，第一激光组件121中的两个激光器的光路分别位于第二反射镜142中的两个子反射镜中一个子反射镜的两侧。
如图14所示，其为图4所示第三激光组件123的两个激光器的俯视图。其中，每个 激光器包括矩形出光面，出光面具有激光出射孔h，矩形出光面相对的两个边具有驱动引线(可以包括正极引线p以及负极引线n)。在一种可能的实施方式中，第三激光组件123的两个激光器中，一个激光器12a的一个不具有驱动引线的边a与另一个激光器12a的一个不具有驱动引线的边b相距0-10毫米。也即是这两个边相抵接或者相距一个较小的间距。如此结构下，两个激光器紧密接触，可以缩小激光组件的体积，而且该组激光器出射的光斑的间隙也小，利于缩小光源部分的体积，也降低了合光的难度，这是因为在合光时，一方面需要将各个方向的光束进行光路的转折汇聚到一个方向上，另一方面，还需要将不同光路的光斑叠加在一起，并减小叠加后的光斑的尺寸，不同光斑之间的间隙越大，这种合光的难度越大。
第一激光组件的结构与第三激光组件类似，在第一激光组件的两个激光器中，一个激光器的一个不具有驱动引线的边与另一个激光器的一个不具有驱动引线的边相抵接或者相距一个较小的间距。
多个激光组件12还包括至少一个第二激光组件122，每个第二激光组件122位于壳体11中正对望远镜组13的入光面的位置。图3-3所示为多个激光组件12包括一个第二激光组件122的情况，但本申请实施例对此并不进行限制。
望远镜组13的入光面是其接收多个激光组件12出射光的一面，每个第二激光组件122位于壳体11中正对望远镜组13的入光面的位置，使得每个第二激光组件122的出射光可以直接射入望远镜组13的入光面。
使用本申请实施例提供的光源部分时，望远镜组13可以在其镜片口径较小的情况下接收多个激光组件的出射光，避免出现望远镜组13口径较大无法加工的情况。且望远镜组13的镜片口径较小，使得包括该望远镜组13的光源部分的体积较小。
在一种可能的实施方式中，反射镜组14(图4未标出)包括第一反射镜141，第一反射镜141位于望远镜组13的光轴上。其中，光轴是射入望远镜组13入光面的入射光光路的对称轴。
至少一个第二激光组件122的出射光不经过第一反射镜141而直接射入望远镜组13的入光面。
每个第一激光组件121的出射光射向第一反射镜141，并被第一反射镜141反射向望远镜组13的入光面。
反射镜组14还包括第二反射镜142。
每个第一激光组件121的出射光不经过第二反射镜142而直射入第一反射镜141的入光面。
多个激光组件12还包括至少一个第三激光组件123(图3-3所示为多个激光组件12包括一个第三激光组件123的情况，但本申请实施例对此并不进行限制)，每个第三激光组件123的出射光射向第二反射镜142，并被第二反射镜142反射向第一反射镜141，再由第一反射镜141反射向望远镜组13的入光面。
示例性的，可以将至少一个第一激光组件121设置在望远镜组13的一侧，至少一个第二激光组件122以及至少一个第三激光组件123设置在望远镜组13的另一侧，如此结构下，接收多个激光组件发出的平行光的入光面较小，避免了将多个激光组件并排设置导致接收多个激光组件发出的平行光的入光面较大，进而导致光源部分的体积较大的问题。
图6是本申请实施例提供的一种光源部分的结构示意图。参考图6可以看出，该光源部分10可以包括：
壳体11以及装配于壳体11上的多个激光组件12(图6为拆解图，未示出标号)、望远镜组13以及反射镜组14。
多个激光组件安装于壳体11的不同位置，且多个激光组件的出射光不全平行，多个激光组件包括至少一个第一激光组件121，每个第一激光组件121的出射光射向反射镜组14，并由反射镜组14将光反射向望远镜组13的入光面。
其中，望远镜组件13可以将多个激光器的出射光转换为平行光并进行缩束(示例性的，望远镜组13可以包括一个凸透镜以及一个凹透镜，凸透镜靠近多个激光组件，凹透镜位于凸透镜远离多个激光组件的一面，凸透镜可以用于将射向望远镜组13的光进行缩束，再将缩束后的光射向凹透镜，使得缩束后的光发散为平行光束)。
相关技术中，光源部分中的多个激光器并排设置，且正对望远镜组的入光面，多个激光器发出的光平行入射至望远镜组的入光面，经望远镜组调整后射入荧光组件中。但是，光源部分中的接收多个激光器发出的平行光的入光面较大，进而导致整个光源部分的尺寸较大。
激光器为激光器阵列光源，该阵列光源向同一方向发出激光束，由于激光器中的多个光源并排设置，导致望远镜组件接收激光器发出的激光束的入光面的口径较大，而口径较大会导致望远镜组件的镜片的边缘厚度过薄，进而导致望远镜组件难以加工。
本申请实施例中，如图2和图7所示，光源部分包括多个激光组件，具体地，包括三组激光器，共6个激光器组件，其中第一激光器组121设置于光源壳体的一个侧面上，与该侧面相邻的垂直的另一侧面上设置有第二激光器组122和第三激光器组123，其中第二激光器组122和第三激光器组123中各自包括的两个激光器的安装方式不同。从图3-3所 示的顶面结构图和图2、图7所示的立体结构中可知，第二激光器组122中的两个激光器是沿着从顶面看，垂直于纸面的方向进行排列的，因此从图3-2和图4中的光路平面示意图中，仅能看到一个激光器的示意，而第三激光器组123中的两个激光器是沿着从顶面看，平行于纸面的方向进行排列，即第二激光器组122和第三激光器组123的激光器的排列方向是互相垂直的。第一激光器组121的两个激光器，从图3-3所示的顶面示意图和图4所示的光路平面示意图中可知，也是沿着平行于纸面的方向排列的。这样，第一激光器组121发出的光束穿过第二反射镜142的间隔，入射至第一反射镜141上，第三激光器组123发出的光束入射至反射镜142，并被反射至第一反射镜141上，两个激光器组的光束叠加到第一反射镜141上。
而第二组激光器122是与第三组激光器123的排列方向呈垂直，如图12-1和图12-2示意，以第三组激光器123的两个激光器的排列方向为横向，则第二组激光器122的两个激光器为纵向，如图12-2所示，两个纵向排列的激光器之间具有间隙D1，这使得第二组激光器122中的两个激光器发出的光束之间也具有间隙，该间隙可以避开第一反射镜141，从而可以直接入射至望远镜组的第一片透镜。这样，经过第一反射镜141反射的光束与第二组激光器122直接入射至望远镜组的第一片透镜的光束分别照射在第一片镜片的不同位置，可以充分利用第一片透镜的区域，光斑在第一片透镜上的分别趋向均匀和对称性，能够提高镜片的光利用效率。
多个激光组件发出的光束经过合光，并经过望远镜组缩束，以及还可以进一步经过扩散片的扩散，以及位于荧光轮正面的准直镜组的会聚后入射至荧光轮正面。
在上述示例中，以多个激光组件包括三组激光器，且每组激光器包括两个激光器为例进行了说明，本领域技术人员能够理解，当多个激光组件包括第一激光器组件121和第二激光器组件122时，也同样适用上述发明思路。这样，激光器组件121与第二激光器组件122设置于光源壳体互相垂直的侧面上，第一激光器组件121和第二激光器组件122均包括多个激光器，以2个为例说明，每组中2个激光器的排列方向不同，具体地，第一激光器组件121可以沿着所在壳体侧面以平行于光源底面的方向排列，而第二激光器组件122可以沿着所在壳体侧面以垂直于光源底面的方向排列。这样，多个激光组件出射的部分光束，比如本示例中第一激光器组件121出射的部分光束通过第一反射镜反射至望远镜组的入光面，以及，多个激光组件输出的至少部分其他光束，比如第二激光器组件122的光束通过避开第一反射镜，直接入射望远镜组的入光面，这样两个激光器组的光束入射到望远镜组第一片透镜上不同的区域，光斑关于透镜的光轴的对称性也得以提高。
综上所述，本申请实施例提供的激光投影设备中，光源部分包括壳体以及装配于壳体 内的多个激光组件、望远镜组以及反射镜组，多个激光组件安装于壳体的不同侧面，具体地，位于互相垂直的两个侧面上，多个激光组件中，位于壳体不同侧面上的激光器组件可以通过反射及透射的方式实现合光，合光后的光束再经过合光反射镜再次反射，而其他组的激光器组件通过间隙排列，避开合光反射镜的空间区域，而是在空间方向上从合光反射镜的上下区域直接透射光束，该透射的光束和经过合光反射镜反射的光束再共同入射至同一光学部件，光束可以照射于光学部件的不同区域，相对于光学部件光轴的对称性提高，避免了单一方向入射光学部件时，光学部件的某一维度的尺寸需要增大而导致整个圆形透镜尺寸较大幅度的增加，以及透镜处理区域利用率的降低。这是因为光束在单一方向照射透镜时，比如一个长条形的光斑，透镜需要在直径上满足光斑长度方向的尺寸，因为透镜通常加工为圆形，任何一个方向的尺寸的增加都会导致整个圆形面积的增大。
以及，在一个示例性实施例中，光源部分10包括壳体11以及装配于壳体11上的多个激光组件12、望远镜组13以及反射镜组14，每个激光组件12包括两个激光器，且每个激光组件中的两个激光器固定在固定壳体上，通过固定壳体将激光组件12固定在壳体11上，在激光组件12与壳体11之间有密封玻璃以及位于密封玻璃两侧的密封橡胶，反射镜组14固定在壳体11的底板111上。
多个激光组件12包括一个第一激光组件121，一个第二激光组件122以及一个第三激光组件123，反射镜组14包括第一反射镜141以及第二反射镜142，第一激光组件121的出射光射向第一反射镜141，第三激光组件123的出射光射向第二反射镜142，并被第二反射镜142反射向第一反射镜141，第一反射镜141将第一激光组件121以及第三激光组件122的出射光射向望远镜组13，第二激光组件122正对望远镜组13的入光面，且第二激光组件122的出射光直射入望远镜组13，望远镜组13将多个激光组件12的出射光射入荧光组件15，荧光组件15将望远镜组件13的出射光中转换为各种基色光，并将各种基色光射出光源部分。
如图5所示，其为图3-1所示光源部分10中壳体的结构示意图，为从底面角度的视图。壳体11包括底板111和立于底板111上的壳壁112，反射镜组14安装于底板111上，多个激光组件12(图5未示出)安装于壳壁上112。
将反射镜组14安装在底板111上，便于在光源部分10封装好之后，对反射镜组14进行调节，以获取需要的多个激光组件的出射光。
在一种可能的实施方式中，壳壁112包括互相垂直的第一子壳壁1121和第二子壳壁1122，第一子壳壁1121所在平面与望远镜组13的入光面平行。
第一激光组件安装于第二子壳壁1122上，第二激光组件和第三激光组件安装于第一子 壳壁1121上。
在一种可能的实施方式中，壳壁112上具有与多个激光组件12一一对应的多个开孔a，多个激光组件12安装于壳壁112外，且出光方向一一对应的朝向多个开孔a。
在一种可能的实施方式中，在图3-1所示的光源部分中，每个激光组件12包括两个激光器12a。
以及，如图7所示，第一激光组件121中的两个激光器12a以及第三激光组件123中的两个激光器12a均沿平行于底板的方向设置，第二激光组件122中的两个激光器12a沿垂直于底板的方向设置。
如图8所示，其为图3-2所示多个激光组件12的爆炸图。每个激光组件12包括至少一个激光器12a和至少一个密封结构12b(图8所示为每个激光组件12包括两个激光器12a和一个密封结构12b的情况，本申请实施例对此并不进行限制)，每个激光器12a通过密封结构12b安装于壳壁112外，且每个激光器12a的出光方向一一对应的朝向多个开孔a(图8未示出)。其中，密封结构12b包括密封玻璃b以及位于密封玻璃b两面上的密封橡胶c。
由于激光器存在较多的装配间隙，在使用光源部分时，无法保证光源部分壳体内的气密性，外部的灰尘等会进入光源部分，并沉积在激光器出射光的一面，使得激光器的透光率降低，而使用密封结构12b将激光组件安装于壳体的壳壁上，激光组件的出射光透过密封玻璃射入光源部分的壳体内，可以维持光源部分中激光器的高亮度，缓解激光器的亮度衰减，保证光源部分壳体内的气密性。
如图9所示，其为图3-3所示一种第一激光组件121的结构示意图，该结构可同样应用于第三激光组件123。可以将第一激光组件121中的至少一个激光器12a通过密封结构12b固定在一个固定壳体121a上，再将固定壳体121a安装在壳壁112(图9未示出)外，如此便能使第一激光组件121中至少一个激光器12a的排布较为紧凑。将第一激光组件121中的每个激光器12a对应的供电印制电路板(Printed Circuit Board，PCB)121b分别置于激光器12a的两侧，这样激光器与激光器之间的距离可以较近，每个激光器12a的出射光之间的间隔也较小。
图10是图9所示第一激光组件121的俯视图。第一激光组件121通过固定壳体121a安装在壳壁(图10未示出)上，每个激光器(图10未示出)对应的供电印制电路板121b位于激光组件不同的两侧，可以减小组成第一激光组件121的激光器之前的间距，使得第一激光组件121的结构较为紧凑，从而进一步减小光源部分的体积。
图11为图3-3所示另一种第一激光组件121的结构示意图。
在一种可能的实施方式中，图11中的第一激光组件121包括固定壳体121a，至少一 个激光器12a，与每个激光器12a对应的供电印制电路板121b，与每个激光器12a对应的密封结构12b以及散热组件121c。散热组件121c可以通过固定螺钉固定在至少一个激光器12a的上部，以便在至少一个激光器12a工作时，对至少一个激光器12a进行散热。
图12-1为图3-3所示第二激光组件122的分解结构示意图，供电印制电路板122b位于激光器12a相对的两侧，第二激光组件122固定在固定壳体122a上，固定壳体122a安装在壳壁112(图12-1未示出)外，如此结构可以进一步减小每个第二激光组件122中至少一个激光器12a之间的距离，从而进一步减小光源部分的体积。
在图6示的光源部分10中，壳体11包括出光孔113，望远镜组13的出射光由出光孔113射出。
在一种可能的实施方式中，在图3-1所示的光源部分10中，还包括荧光组件15，荧光组件15的入光孔与壳体11的出光孔连接。
荧光组件15可以将望远镜组13的出射光转换为各种基色光(例如红光、绿光)，再将各种基色光从光源出光口射出。
示例性的，如图16-1所示，其为图3-1所示荧光组件15与壳体11的结构示意图，可以在入光孔151与出光孔113之间添加密封橡胶c再进行连接，可以进一步提高光源部分10的密封性。
图8为图3-1所示另一种第一激光组件121的结构示意图。反射镜组(图8未示出)通过调节组件114安装在底板111上，调节组件114可以对反射镜组中的镜片进行调节，以使反射镜组的反射光符合设计要求。使用调节组件114便于在光源部分10封装完成后对反射镜组进行调节，以使射出光源部分10的光符合设计要求。
使用本申请实施例提供的光源部分，光源部分可实现400瓦(watt，w)光功率输出，输出的光通量大于8000流明(lumen，lm)，较相关技术而言，可以在减小光源部分体积的基础上实现高亮度输出。且本申请实施例中多个激光组件的排布较为紧凑，激光器形成的光斑直径较小，望远镜组13中的凸透镜较小，从而使得光源部分10的整体体积较小。
而随着激光光源功率的增加，对于荧光组件15的激发功率也相应增加，相应地也会产生更多的热，而荧光轮的温度对荧光转换效率的影响非常大，是制约荧光光功率的主要因素。为了适应大功率的激发功率，荧光组件15中的荧光轮150的直径可相比于传统65mm的尺寸进行相应增大，比如增大至92mm，荧光轮150盘面尺寸增大的主要目的是为了加速散热。
以及，如图16-2所示，荧光轮150的盘面上还设置有散热鳍片1502，散热鳍片区域与透射区1503和荧光区1504均不重叠，可设置为凸起于盘面的结构。当荧光轮旋转时， 散热鳍片1502的凸起结构相当于扇叶，可以带动气流流动，加速盘面表面的气流流动速度，快速带走热量，降低荧光轮表面的温度。
以及，如图15所示，其为本申请实施例中，任一激光器的结构示意图，该激光器可以多芯片激光器(Multi Chip LD，MCL)，每个MCL可以包括多个发光单元c、发光单元上的准直镜片及散热基底h。矩形的散热基底d的在图4中的左右两侧有驱动引线q，可以给发光单元c供电；散热基底d不具有驱动引线的两侧有固定孔位k。多个发光单元c呈矩阵排列在散热基底d中间，分别与散热基底的两条轴线呈对称排布。多个发光单元发出的矩阵光束在不具有驱动引线的两侧的方向f之间的宽度，不大于散热基底在方向f上的宽度的1/2。如此两个相邻的激光器发出的矩阵光束之间便具有一定的距离，可以便于设置如图4所示的光路。
本申请实施例提供的光源部分，通过空间合光的方式将多个激光器的光线输入了望远镜组，相较于通过偏振片进行偏振合光的方式，不但成本较低，而且合光效率得到了提升。
另外，本申请实施例提供的光源部分，通过三个独立的反射镜进行合光，相较于通过半透半反镜进行合光的方案，成本较低，减少了透射损失，利于合光效率的提高。
以及，在申请提供的实施例中，激光投影设备的光源亮度较高，一方面使得光源部分本身的转化热增加，同时，高能光束的传播也使得整个系统的热量积累加快。
为了保证上述高亮度投影设备的正常工作，如图1和图17所示，激光投影设备还包括散热系统40，具体地，散热系统40可以是液冷散热系统，液冷散热系统包括冷头，管道，冷排以及风扇。激光器是整个设备中的核心热源，激光器采用MCL型激光器时，其背面较为平整，可以设置冷头，如图11所示，散热组件121c可以具体为冷头。同理，对于其他组的激光器也同样设置有冷头，冷头通过管道将携带有热量的冷却液流向冷排，冷排处设置有风扇，风扇对冷排进行吹冷气降温，从而冷却液得到了冷却，从冷排的出口流出，再次回到冷头处进行循环。
综上所述，本申请实施例提供了一种激光投影设备，能够提供较高亮度的投影画面，且能够兼顾光学引擎部分的光效和体积。光源部分包括多个激光组件、望远镜组以及反射镜组，以及荧光组件。通过在光源部分壳体上的不同侧面设置多个激光组件，且位于互相垂直的侧面上，多个激光组件中，位于壳体不同侧面上的激光器组件可以通过反射及透射的方式实现合光，合光后的光束再经过合光反射镜再次反射，而其他组的激光器组件通过间隙排列，该组激光器的排列方向与前述激光器组中多个激光器的排列方式不同，可以使得激光器之间具有间隙，进而每个激光器发出的光束之间具有间隙，从而避开合光反射镜的空间区域，而是在空间方向上从合光反射镜的上下区域直接透射光束，该透射的光束和 经过合光反射镜反射的光束再共同入射至同一光学部件，光束可以照射于光学部件的不同区域，关于光学部件的光轴的对称性得到了提高，如此结构下，多组激光的出射光可以不同时正对望远镜组，避免了单一方向入射光学部件时导致光学部件的某一维度的尺寸需要增大而导致整个圆形透镜尺寸较大幅度的增大，以及透镜处理区域利用率的降低，也大大降低了镜片加工成本。
以及，为了配合激光光束功率的增加，荧光组件的荧光轮采用大直径荧光轮，且荧光轮本身设置有散热鳍片，可以增加荧光轮的散热效率，保证在大功率激发下，荧光转换效率的稳定性。
以及，激光器的出光效率也会受到温度的影响，不同的激光器具有自身适宜的温度范围。为了保证高亮度光源的正常工作，激光投影设备还设置有散热系统，在本示例中，使用液冷散热系统，对高热激光器进行水冷散热。能够保证光学引擎部分在可控的温度范围内工作，激光器和荧光的光功率也可以较为稳定。
并且由于光源部分和镜头部分并排排列，距离较近，在光源部分的温升可控的情况下，也会减轻向镜头部分的热传递，减轻镜头部分镜片的温飘现象，保持镜片组件较好的解析能力。
以及，为了保证系统高亮度的输出，尤其对光源部分进行了较高等级的密封，减少灰尘异物的进入，减轻光衰导致的亮度下降问题，利于高亮光束稳定的输出。
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 (17)

  1. 一种激光光源，其特征在于，包括：
    多个激光组件、望远镜组以及反射镜组；
    所述多个激光组件的出射光不全平行，所述多个激光组件包括至少一个第一激光组件，每个所述第一激光组件的出射光射向所述反射镜组，并由所述反射镜组将光反射向所述望远镜组的入光面，且所述多个激光组件的出射光射向所述望远镜组的入光面的不同位置以实现合光。
  2. 根据权利要求1所述的光源，其特征在于，所述多个激光组件还包括至少一个第二激光组件，每个所述第二激光组件位于所述壳体中正对所述望远镜组的入光面的位置。
  3. 根据权利要求2所述的光源，其特征在于，每一激光组件包括两个激光器；
    所述第一激光组件中的两个激光器沿着所在侧面的排列方向，与所述第二激光组件中的两个激光器沿着所在侧面的排列方向垂直。
  4. 根据权利要求2所述的光源，其特征在于，所述反射镜组包括第一反射镜，所述第一反射镜位于所述望远镜组的光轴上；
    每个所述第一激光组件的出射光射向所述第一反射镜，并被所述第一反射镜反射向所述望远镜组的入光面。
  5. 根据权利要求2所述的光源，其特征在于，所述第二激光组件包括两个激光器；
    所述两个激光器的光路位于所述第一反射镜的两侧。
  6. 根据权利要求2所述的光源，其特征在于，所述反射镜组还包括第二反射镜；
    所述多个激光组件还包括至少一个第三激光组件，每个所述第三激光组件的出射光射向所述第二反射镜，并被所述第二反射镜反射向所述第一反射镜，再由所述第一反射镜反射向所述望远镜组的入光面。
  7. 根据权利要求6所述的光源，其特征在于，所述第二反射镜为多个，且间隔排列，所述第一激光器组件的出射光通过所述间隔入射至所述第一反射镜。
  8. 根据权利要求6所述的光源，其特征在于，所述第一激光组件中的两个激光器的排布方向与所述第三激光组件中的两个激光器的排布方向平行，所述第一激光组件中的两个激光器的排布方向与所述第二激光组件中的两个激光器的排布方向垂直。
  9. 根据权利要求3-8任一项所述的光源，其特征在于，每个所述激光器包括矩形出光面，所述出光面具有激光出射孔，所述矩形出光面相对的两个边具有驱动引线。
  10. 根据权利要求6所述的光源，其特征在于，所述第一激光组件的两个激光器中，一个激光器的一个不具有所述驱动引线的边与另一个激光器的一个不具有所述驱动引线的边相距0-10毫米；
    或者，
    所述第三激光组件的两个激光器中，一个激光器的一个不具有所述驱动引线的边与另一个激光器的一个不具有所述驱动引线的边相距0-10毫米。
  11. 一种激光投影设备，其特征在于，包括：光源部分，用于提供照明光束；光机部分，用于对所述照明光束进行调制；镜头部分，用于对调制后的照明光束进行成像于投影屏幕上；
    其中，所述光源部分包括装配于壳体内的多个激光组件、望远镜组以及反射镜组；
    所述多个激光组件安装于所述壳体的互相垂直的侧面上；位于所述互相垂直的侧面上的每组激光器均包括多个激光器，且排列方向不同；所述多个激光组件出射的部分光束通过所述反射镜组反射至所述望远镜组的入光面，以及，多个激光组件输出的至少部分其他光束避开所述反射镜组，直接入射所述望远镜组的入光面。
  12. 根据权利要求11所述的激光投影设备，其特征在于，所述多个激光组件包括第一激光器组件和第二激光器组件，所述反射镜组包括第一反射镜，所述第一反射镜位于所述望远镜组的光轴上；
    每个所述第一激光组件的出射光射向所述第一反射镜，并被所述第一反射镜反射向所述望远镜组的入光面；
    所述第二激光器组件的出射光避开所述第一反射镜，直接入射至所述望远镜组的入光面。
  13. 根据权利要求12所述的激光投影设备，其特征在于，所述反射镜组还包括第二反射镜；
    所述多个激光组件还包括至少一个第三激光组件，每个所述第三激光组件的出射光射向所述第二反射镜，并被所述第二反射镜反射向所述第一反射镜，再由所述第一反射镜反射向所述望远镜组的入光面。
  14. 根据权利要求13所述的激光投影设备，其特征在于，所述壳体包括底板和立于所述底板上的壳壁，所述反射镜组安装于所述底板上，所述多个激光组件安装于所述壳壁上。
  15. 根据权利要求14所述的激光投影设备，其特征在于，所述壳壁包括互相垂直的第一子壳壁和第二子壳壁，所述第一子壳壁所在平面与所述望远镜组的入光面平行；
    所述第一激光组件安装于所述第二子壳壁上，所述第二激光组件和所述第三激光组件安装于所述第一子壳壁上。
  16. 根据权利要求11-15任一项所述的激光投影设备，其特征在于，每个激光组件包括至少一个激光器和至少一个密封结构，每个所述激光器通过所述密封结构安装于所述壳壁上。
  17. 根据权利要求11所述的激光投影设备，其特征在于，所述光源部分还包括荧光轮，所述荧光轮用于接收经所述望远镜组出射的激光光束，并受激进行波长转换。
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