WO2021259285A1 - 投影光源和投影设备 - Google Patents

投影光源和投影设备 Download PDF

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Publication number
WO2021259285A1
WO2021259285A1 PCT/CN2021/101616 CN2021101616W WO2021259285A1 WO 2021259285 A1 WO2021259285 A1 WO 2021259285A1 CN 2021101616 W CN2021101616 W CN 2021101616W WO 2021259285 A1 WO2021259285 A1 WO 2021259285A1
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WO
WIPO (PCT)
Prior art keywords
light
laser
area
lens
projection
Prior art date
Application number
PCT/CN2021/101616
Other languages
English (en)
French (fr)
Inventor
颜珂
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.)
Filing date
Publication date
Priority claimed from CN202010577387.2A external-priority patent/CN113900339B/zh
Priority claimed from CN202110678499.1A external-priority patent/CN113311654B/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 CN202180044674.XA priority Critical patent/CN115803679A/zh
Publication of WO2021259285A1 publication Critical patent/WO2021259285A1/zh
Priority to US18/083,167 priority patent/US20230119932A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • 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 optoelectronic technology, and in particular to a projection light source and projection equipment.
  • projection equipment mainly includes a light source system, an optomechanical system and a lens.
  • the light source system is located on the light entrance side of the optomechanical system
  • the lens is located on the light exit side of the optomechanical system
  • the light source system emits light beams to the optomechanical system. After the light beam is processed, it is emitted to the lens, so that the lens can emit the light beam to the projection screen, and then realize the image display on the projection screen.
  • a projection light source includes a laser, a light combining lens, a condensing lens, and a fluorescent wheel;
  • the light combining lens includes a plurality of transmission areas and a plurality of reflection areas;
  • the fluorescent wheel includes a first area and a second area, and a light diffusion portion is provided on the second area;
  • the laser is used to emit multiple laser beams, the multiple laser beams are respectively directed to the multiple transmission areas, and the transmission areas are used to transmit the incident laser light to the condensing lens;
  • the spots formed on the condensing lens by any two of the multiple lasers are asymmetric with respect to the optical axis of the condensing lens; the condensing lens is used to converge the incident laser light to the fluorescent wheel;
  • the fluorescent wheel is configured to rotate around a rotating shaft, and during the rotation of the fluorescent wheel, different areas of the fluorescent wheel are irradiated by the focused laser;
  • the first area When the condensed laser light is directed to the first area, the first area is excited to emit fluorescence, so that the fluorescence passes through the condensing lens and is directed toward the reflection area;
  • the light diffusing part diffuses the converged laser light so that the diffused laser light passes through the condensing lens and is directed to the reflection area;
  • the reflection area is used to reflect the incident light along the target direction.
  • a projection light source in another aspect, includes a laser, a light combining lens, a condensing lens, and a fluorescent wheel;
  • the light combining lens includes: a transmission area and two transmission areas located on both sides of the transmission area A reflection area;
  • the fluorescent wheel includes a first area and a second area, and a light diffusion portion is provided on the second area;
  • the laser is used to emit laser light, the laser light is directed to the transmission area, and the transmission area is used to transmit the incident laser light to the condensing lens;
  • the condensing lens is used to converge the incident laser light toward the fluorescent wheel, and the laser light directed toward the condensing lens passes through the optical axis of the condensing lens;
  • the fluorescent wheel is configured to rotate around a rotating shaft, and during the rotation of the fluorescent wheel, different areas of the fluorescent wheel are irradiated by the focused laser;
  • the first area When the condensed laser light is directed to the first area, the first area is excited to emit fluorescence, so that the fluorescence passes through the condensing lens and is directed toward the reflection area;
  • the light diffusing part diffuses the converged laser light so that the diffused laser light passes through the condensing lens and is directed to the reflection area;
  • the reflection area is used to reflect the incident light along the target direction.
  • a projection device comprising: the above-mentioned projection light source, a light valve and a lens;
  • the projection light source is used to emit laser light to the light valve, the light valve is used to modulate the incident laser light and then directed to the lens, and the lens is used to project the incident laser light to form a projection image .
  • Fig. 1 is a schematic structural diagram of a projection light source provided by related technologies
  • FIG. 2 is a schematic structural diagram of a projection light source provided by an embodiment of the present application.
  • Fig. 3 is a schematic structural diagram of a fluorescent wheel provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of another projection light source provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of still another projection light source provided by another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a projection device provided by an embodiment of the present application.
  • Fig. 1 is a schematic diagram of the structure of a projection light source provided by the related art.
  • the projection light source includes: a laser 001, a dichroic mirror 002, a first collimating lens group 003, a fluorescent wheel 004, a relay circuit system, and a light pipe 005.
  • the dichroic mirror 002, the first collimating lens group 003, and the fluorescent wheel 004 are located on the light-emitting side of the laser 001, and are arranged in sequence along the light-emitting direction of the laser 001.
  • the relay circuit system includes: a second collimating lens group 006, a first reflecting lens 007, a first collimating lens 008, a second reflecting lens 009, a second collimating lens 010, a third reflecting lens 011, and a third collimating lens.
  • Lens 012 wherein, the second collimating lens group 006 and the first reflecting lens 007 are located on the side of the fluorescent wheel 004 away from the laser 001, and are arranged in sequence along the light emitting direction of the laser 001 (the y direction in FIG. 1).
  • the first reflecting lens 007, the first collimating lens 008, and the second reflecting lens 009 are arranged in sequence along the direction opposite to the target direction (the x direction in FIG.
  • the second reflecting lens 009, the second collimating lens 010 and the third reflecting lens 011 are arranged in order along the direction opposite to the direction of the laser 001.
  • the third reflecting lens 011, the third collimating lens 012, the dichroic mirror 002, and the light pipe 005 are arranged in sequence along the target direction, and the dichroic mirror 002 is inclined toward the light pipe 005.
  • the light pipe 005 is located at the light exit of the projection light source.
  • the laser 001 can emit blue laser light, and the dichroic mirror 002 can transmit blue light.
  • the blue laser light emitted by the laser 001 can pass through the dichroic mirror 002 and the first collimating lens group 003 to be directed toward the fluorescent wheel 004.
  • the fluorescent wheel 004 includes a fluorescent area and a transmission area (not shown in FIG. 1).
  • the fluorescent area has a fluorescent material that can emit fluorescence (such as red fluorescence and green fluorescence) under the irradiation of blue laser light.
  • the fluorescent wheel 004 can rotate around a rotation axis parallel to the light-emitting direction of the laser 001, and the blue laser light can be directed to different areas of the fluorescent wheel 004 when the fluorescent wheel 004 rotates.
  • the blue laser light When the blue laser light is directed to the transmission area of the fluorescent wheel 004, the blue laser light can pass through the transmission area and the second collimating lens group 006 and be directed to the first reflection lens 007, and then be reflected by the first reflection lens 007. It passes through the first collimating lens 008 and is directed toward the second reflecting lens 009. Then the blue laser light can be reflected by the second reflective lens 009 to pass through the second collimating lens 010 to the third reflective lens 011, and be reflected by the third reflective lens 011 to pass through the third collimating lens 012 and the two-way
  • the color mirror 002 is directed toward the light pipe 005.
  • the blue laser can excite the fluorescent material in the fluorescent area to emit fluorescence to the dichroic mirror 002.
  • the dichroic mirror 002 can also reflect red and green light, so the fluorescence can be reflected on the dichroic mirror 002 again to be directed toward the light pipe 005.
  • the light pipe 005 can receive fluorescence and blue laser light, and the fluorescence and blue laser light can be mixed under the action of the light pipe 005, and the condensing lens can use the mixed light for the projection of the projection device.
  • Fig. 2 is a schematic structural diagram of a projection light source provided by an embodiment of the present application.
  • the projection light source 10 may include:
  • the light combining lens 103 includes a plurality of transmission areas and a plurality of reflection areas, and the plurality of transmission areas and the plurality of reflection areas may be alternately arranged one by one.
  • the light combining lens 103 includes a first transmission area 1031a, a second transmission area 1031b, a first reflection area 1032a, and a second reflection area 1032b, a first reflection area 1032a, a first transmission area 1031a, a second reflection area 1032b, and a second reflection area 1032a.
  • the transmission areas 1031b may be arranged in sequence along the extension direction of the light combining lens.
  • the fluorescent wheel 105 includes a first area and a second area.
  • the second area is provided with a light diffusion portion (the first area, the second area, and the light diffusion portion are not marked in FIG. 2), and the fluorescent wheel 105 is not provided with light-transmitting parts.
  • the first area may be a fluorescent area, and the second area may be a reflective area.
  • the first area can be excited to fluoresce under the irradiation of laser light, and the second area can diffuse the incident laser light and reflect the incident laser light.
  • the laser 101, the light combining lens 103, the condensing lens 104, and the fluorescent wheel 105 may be sequentially arranged along the auxiliary direction (the y direction in FIG. 2).
  • the laser 101 can emit multiple laser beams, and the multiple laser beams are respectively directed to multiple transmission areas in the light combining lens 103, and each transmission area can transmit the incident laser light to the condensing lens 104.
  • the spots formed on the condensing lens 104 by any two of the multiple lasers are asymmetric with respect to the optical axis h of the condensing lens 104.
  • the multiple laser beams do not pass through the optical axis of the condensing lens 104.
  • the multiple laser beams emitted by the laser 101 include a first laser beam L1 and a second laser beam L2.
  • the first laser beam L1 can be directed to the first transmission area 1031a, and passes through the first transmission area 1031a to the condensing lens 104;
  • the second laser beam L2 is directed to the second transmission area 1031b, and passes through the second transmission area 1031a.
  • the area 1031b is directed toward the condensing lens 104.
  • the spot formed by the first laser beam L1 on the condenser lens 104 and the spot formed by the second laser beam L2 on the condenser lens 104 are asymmetric with respect to the optical axis h of the condenser lens 104.
  • the position of the mirror surface irradiated by the first laser beam L1 and the position of the mirror surface irradiated by the second laser beam L2 on the condensing lens 104 are asymmetric with respect to the optical axis h of the condensing lens 104.
  • the first laser beam L1 is closer to the optical axis h than the second laser beam L2.
  • the spot formed on the condensing lens 104 by the first laser beam L1 and the spot formed on the condensing lens 104 by the second laser beam L2 do not have a symmetrical position with respect to the optical axis h.
  • the condensing lens 104 can converge the incident laser light toward the fluorescent wheel 105.
  • the fluorescent wheel 105 can rotate around the rotation axis Z. During the rotation of the fluorescent wheel 105, different areas of the fluorescent wheel 105 are irradiated by the focused laser light (that is, the laser light emitted from the condensing lens 104).
  • the concentrated laser light is directed to the first area of the fluorescent wheel 105, the first area is excited to emit fluorescence, and the color of the fluorescent light is different from the color of the laser light incident on the fluorescent wheel 105.
  • the fluorescence can pass through the condensing lens 104 and be directed to the light combining lens 103, such as to the reflection area of the light combining lens 103.
  • the light diffusing part provided on the second area can diffuse the converged laser light, and then the diffused laser light can pass through the condensing lens 104 again and be directed toward
  • the light-combining lens 103 is directed toward the reflection area of the light-combining lens 103.
  • the reflection area of the light combining lens 103 can reflect the light emitted by the condensing lens 104 to the reflection area along the target direction (the x direction in FIG. 2); that is, the reflection area can reflect the laser light emitted by the condensing lens 104 to the reflection area. Both the fluorescence and the fluorescence are reflected along the target direction to achieve the mixing of the laser and fluorescence.
  • the auxiliary direction (y direction) intersects with the target direction (x direction).
  • Fig. 2 takes the embodiment of the present application where the auxiliary direction is perpendicular to the target direction as an example.
  • the angle between the auxiliary direction and the target direction may also be an obtuse angle or an acute angle.
  • the first laser beam L1 and the second laser beam L2 emitted by the laser 101 may be two independent beams, or may also be two parts of a whole laser beam, which is not limited in the embodiment of the present application.
  • the laser 101 can emit not only two laser beams, but also three laser beams, four laser beams, or more. The embodiment of the present application does not limit the number of laser beams emitted by the laser.
  • the first laser beam and the second laser beam described in the embodiments of the present application may be any two laser beams among the multiple laser beams emitted by the laser.
  • the laser may include multiple rows of light-emitting chips, and each laser beam emitted by the laser may be emitted by one or more rows of light-emitting chips.
  • the area irradiated by the laser in the first area emits light in all directions, and the side of the fluorescent wheel 105 away from the condensing lens 104 does not emit light. It is light-transmissive, so the light-emitting angle of the area irradiated by the laser in the first zone can be roughly in the range of 0-180 degrees, and the area is similar to Lambertian when emitting fluorescence.
  • the light spot formed on the condensing lens by the fluorescent light emitted from the first zone can be close to covering the entire mirror surface of the condensing lens.
  • a light diffusion structure is provided on the second area, so that after the laser is directed to the second area, the laser light is reflected by the second area and diffused by the light diffusion structure.
  • the exit angle range of the laser light is relative to the incident angle The range increases.
  • the laser can be emitted to a larger area to be directed to the condensing lens.
  • the position irradiated by the laser on the second area is also equivalent to a Lambertian-like point light source.
  • the light spot formed on the condensing lens can be close to covering the entire mirror surface of the condensing lens.
  • the difference between the emission angle range of the fluorescent light emitted from the first area and the laser light emitted from the second area in the fluorescent wheel can be reduced, and the light mixing effect of the fluorescent light and the laser light can be optimized.
  • the degree of coincidence of the optical axis and the degree of spot coincidence of the reflected blue light and the fluorescent light can be improved, so that the brightness uniformity and color uniformity of the combined light spot can be improved.
  • the light combining lens includes a transmission area and a reflection area
  • the fluorescent wheel includes a first area and a second area
  • the laser light emitted by the laser can be directed through the transmission area of the light combining lens.
  • the fluorescent wheel further excites the first area to emit fluorescence when it is directed to the first area of the fluorescent wheel, and the fluorescence is reflected on the light combining lens along the target direction.
  • the laser is directed to the second zone of the fluorescent wheel, it is reflected by the second zone to the round light lens, and then is reflected by the reflection zone of the light combining lens along the target direction. In this way, without the relay circuit system, the combination of laser light and fluorescence can be realized only by the light combining lens, and the volume of the projection light source is small.
  • the second area of the fluorescent wheel is provided with a light diffusion part.
  • the laser When the laser is directed to the second area of the fluorescent wheel, it can be diffused by the light diffusion part and then directed to the light combining lens, which enlarges the time when the laser is emitted from the fluorescent wheel.
  • the range of light exit angles Due to the large angle range of the excited fluorescence in the first zone, it can ensure that the angle of the laser and fluorescence is small, the mixing effect of laser and fluorescence is better, and the brightness uniformity and color of the combined light spot are uniform
  • the performance can be improved, and the projection screen is formed by using the light with better light mixing effect, and the display effect of the projection screen is also better.
  • FIG. 3 is a schematic structural diagram of a fluorescent wheel provided by an embodiment of the present application, and FIG. 3 shows a top view of the fluorescent wheel in FIG. 2.
  • the fluorescent wheel 105 can rotate around the axis of rotation Z, so that the laser from the condensing lens 104 to the fluorescent wheel 105 (for example, including the first laser beam and the second laser beam) in the first zone 1051 and the first zone 1051 Switch between the two areas 1052.
  • the fluorescent wheel 105 may have a circular ring shape, the toroidal surface of the circular ring may intersect the auxiliary direction (y direction), the rotation axis Z may be parallel to the y direction, the rotation axis Z may pass through the center of the circular ring and The torus perpendicular to the torus.
  • the fluorescent wheel 105 may include a light-reflecting substrate, and a part of the area of the light-reflecting substrate may be provided with a fluorescent material (such as phosphor), and a part of the area may be provided with a light diffusion part.
  • the area where the fluorescent material is provided is the first area 1051 of the fluorescent wheel 105, and the area where the light diffusion portion is provided is the second area 1052 of the fluorescent wheel 105.
  • the fluorescent material of each color can be excited by the laser of that color.
  • the laser When the laser is directed to the first area 1051, it can excite the phosphor powder on it to emit fluorescence of the corresponding color, which is different from the color of the laser, and the fluorescence can be reflected by the reflective substrate to the converging lens 104.
  • a green fluorescent material may be provided in the first region of the fluorescent wheel 105.
  • At least one of a red fluorescent material and a yellow fluorescent material may also be provided in the first region.
  • the fluorescence emitted by the first area of the fluorescent wheel 105 may be green fluorescence, red fluorescence or other colors of fluorescence, such as yellow fluorescence.
  • the fluorescence can also be a laser.
  • the color of the fluorescence is different from the color of the laser light emitted by the laser 101, for example, the laser 101 can emit blue laser light.
  • the color of the laser light emitted by the laser 101 may also be other colors, which is not limited in the embodiment of the present application.
  • the first region 1051 in the fluorescent wheel 105 in the embodiment of the present application may include at least one sub-region, and each sub-region may be provided with a fluorescent material of one color.
  • the first region 1051 includes multiple sub-regions, the multiple sub-regions and the second region 1052 may be arranged in a circle.
  • the first area 1051 may include two sub-regions G1 and G2.
  • the fluorescent wheel 105 can rotate about the rotation axis Z in the w direction or the opposite direction of the w direction.
  • the two sub-regions may include a green fluorescent material and a red fluorescent material, or the two sub-regions may include a green fluorescent material and a yellow fluorescent material, or the two sub-regions may include a green fluorescent material and an orange fluorescent material, respectively.
  • the embodiment of the present application only takes as an example the area of each sub-region in the first region is equal, and the area of the second region is also equal to the area of any sub-region as an example.
  • the area of each sub-area and the second area in the first area of the fluorescent wheel can also be different, and the area of each sub-area and the second area of the fluorescent wheel can be based on the amount of light it emits in the desired light. Proportion to design.
  • the laser light When the laser light is directed to the second area 1052 of the fluorescent wheel 105, it can be diffused by the light diffusing part thereon, and reflected by the reflective substrate toward the condensing lens 104.
  • the light diffusion portion provided on the second area of the fluorescent wheel 105 may be a member with a rough surface, for example, the light diffusion portion may include a diffusion sheet or a diffuse reflector.
  • the diffuse reflector may be a diffuse reflection coating or a diffuse reflection plate.
  • the area corresponding to the second area 1052 in the reflective substrate may be attached with a diffuser or coated with a diffuse reflection coating.
  • the diffuser may be a large-angle diffuser, that is, the diffusion angle of the diffuser to the light may be greater than the angle threshold; the diffuse reflection coating may be a diffuse reflection coating with high reflectivity, that is, the diffuse reflection coating The reflectivity of the diffuse reflection coating to light may be greater than the reflectivity threshold.
  • the diffuse reflector can directly reflect light, if the light diffuser is a diffuse reflector, the second area 1052 of the substrate of the fluorescent wheel 105 may not have a light reflection function.
  • Both the fluorescent light emitted from the first area 1051 of the fluorescent wheel 105 and the laser light emitted from the second area 1052 of the fluorescent wheel 105 can be directed to the condensing lens 104 within a relatively large light output angle range.
  • both the laser light and the fluorescent light may be parallel light after passing through the condensing lens 104. Since the first zone and the second zone in the fluorescent wheel are similar to Lambertian when emitting light, they emit light toward the entire surface of the condensing lens, and the condensing lens can collimate the incident light so that the light is in a whole beam It emits in a form similar to parallel light.
  • the condensing lens 104 is only one convex lens as an example.
  • the condensing lens 104 may also be composed of multiple lenses to improve the light condensing effect of the condensing lens.
  • the mirror surface of the light combining lens 103 can be tilted to ensure that the light emitted by the condenser lens is reflected in the target direction.
  • the light (such as laser or fluorescence) emitted from the condensing lens 104 to the light combining lens 103 is similar to parallel light, and can be emitted from the condensing lens 104 on the entire surface.
  • the light directed to the light combining lens 103 is not only directed to the reflection area of the light combining lens 103 but also to the transmission area of the light combining lens 103.
  • the reflection area in the light combining lens 103 can reflect the laser light and fluorescence.
  • the reflection area reflects light with a color different from the laser light and fluorescence is not limited in the embodiment of the present application.
  • the reflective area can be a full-spectrum highly reflective film, that is, all colors of light are reflected.
  • the light combining lens 103 may have a first surface and a second surface opposite to each other, the first surface may face the laser 101, and the second surface may face the condensing lens 104.
  • the first surface is also the light incident surface of the light combining lens 103, and the second surface is also the light emitting surface of the light combining lens 103.
  • the light emitted from the condensing lens 104 to the light combining lens 103 may be reflected on the second surface.
  • the transmission zone in the light combining lens 103 may have dichroism.
  • the transmission area can transmit the laser light reflected by the second area 1052 of the fluorescent wheel 105 (also the laser light emitted by the laser 101), and reflect the fluorescence excited by the first area 1051 of the fluorescent wheel 105.
  • the transmissive area may also reflect light of all colors that are different from the color of the laser.
  • the transmission area can be used to transmit blue light and reflect red and green light.
  • the fluorescent light excited by the first area 1051 of the fluorescent wheel 105 can be all reflected in the target direction after being directed to the light combining lens 103 for subsequent formation of a projection image, which ensures the utilization of fluorescent light.
  • the transmission area in the light combining lens 103 can also transmit all light.
  • the area of the transmission area in the light combining lens 103 may be smaller than the area of the reflection area.
  • the total area of all transmission areas in the light combining lens 103 may be smaller than the total area of all reflection areas, and the area of each transmission area may also be smaller than the area of its adjacent reflection area, or may also be smaller than the area of each reflection area.
  • the area of each transmission area may be less than or equal to 1/4 of the area of the adjacent reflection area of the transmission area.
  • the area of each transmission area in the light combining lens 103 is equal, and the area of each reflection area is also equal; or the area of each transmission area may also be different, and the area of each reflection area may also be different. It should be noted that the area of the transmission area in the light combining lens 103 only needs to be able to transmit the incident laser light.
  • Fig. 4 is a schematic structural diagram of another projection light source provided by an embodiment of the present application.
  • the laser 10 may further include a beam reduction component 102.
  • the laser light emitted by the laser 101 may be reduced by the beam reducing component 102 and then directed to the transmission area of the light combining lens 103.
  • the contraction component 102 may include a convex lens 1021 and a concave lens 1022 arranged in the auxiliary direction in sequence, and the optical axes of the convex lens 1021 and the concave lens 1022 may be collinear.
  • the optical axis of the contraction component 102 and the optical axis of the condensing lens 104 may not be collinear.
  • the first laser beam L1 and the second laser beam L2 emitted by the laser 101 may be symmetrical with respect to the optical axis of the beam shrinking part 102 to ensure that the beam shrinking part 102 shrinks the two laser beams to the same degree.
  • the optical axis of the condensing component 102 and the optical axis of the condensing lens 104 may also be collinear, which is not limited in the embodiment of the present application.
  • the laser beam can be narrowed.
  • the thinner the laser beam the smaller the area of the transmission area in the light combining lens 102 can be.
  • the beam reduction component 102 is a high-magnification telescope system, which can reduce the beam to a greater extent; in this way, the area of the transmission area in the light combining lens 103 can be smaller. Furthermore, even if the laser light emitted from the condensing lens 104 is directed to the transmission area in the light combining lens 103 and passes through the transmission area, since the area of the transmission area is small, only a small amount of laser light is wasted. The utilization rate of the laser is still high, and the light loss is small.
  • the surface (ie, the first surface) of the light combining lens 103 close to the beam reduction component 102 is provided with an antireflection coating to increase the laser transmittance of the light combining lens 103.
  • the antireflection coating can only increase the transmittance of the laser light (such as blue laser) emitted by the laser, and the antireflection coating is a blue antireflection coating; or the antireflection coating can increase the transmittance for the full spectrum of light, the The anti-reflection coating is a full-spectrum anti-reflection coating.
  • the surface of the light combining lens 103 close to the condensing component 102 may be provided with an anti-reflection coating on the entire surface.
  • an antireflection film may be provided only in the transmission area. In this way, it can be ensured that more laser light is transmitted through the light combining lens 103, the loss of the laser light is less, and the utilization rate of the laser light is improved.
  • the surface (that is, the first surface) of the light combining lens 103 close to the beam reduction component 102 is provided with a light diffusing structure.
  • the light diffusion structure may be a diffusion sheet, or a structure composed of a plurality of microprism structures, or include a plurality of parallel strip-shaped protrusions.
  • the light diffusion structure is a small-angle diffusion structure, and the light diffusion angle of the light diffusion structure is smaller than the angle threshold.
  • the light diffusing structure can diffuse the laser light directed to the light combining lens 103 to ensure the uniformity of the laser energy distribution from the light combining lens 103. Furthermore, after the laser light is directed to the first area of the fluorescent wheel 105, the first The energy distribution of the fluorescence emitted by the zone is more uniform.
  • the number of light beams directed to the light combining lens 103 is equal to the number of transmission areas in the light combining lens 103, and the number of transmission areas and reflective areas in the light combining lens 103 are equal.
  • the number of transmission areas and reflection areas in the light combining lens 103 may also be greater than the number of laser beams emitted by the laser.
  • the light combining lens can also include three reflection areas.
  • the orthographic projection of the light combining lens 103 on the fluorescent wheel 105 can completely cover the orthographic projection of the condensing lens 104 on the fluorescent wheel 105.
  • the light-combining lens functional film layers can be arranged in different areas on the light-transmitting substrate to obtain the transmission area and the reflection area in the light-combining lens.
  • the reflection area of the light combining lens 103 may have a coating.
  • the coating film may be a full-wavelength reflective film, or the coating film is a reflective film for the red, green, and blue wavelength bands.
  • the coating may be located on the side of the light combining lens 103 close to the contraction part 102, or on the side of the light combining lens 103 away from the contraction part 102, which is not limited in the embodiment of the present application.
  • the light combining lens 103 is close to the beam reduction component 102, 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 red and green light.
  • the reflective area of the light combining lens 103 can also be directly made of reflective materials.
  • the transmission area in the light combining lens 103 can also be directly prepared by using dichroic materials. At this time, the plating film and the dichroic film can no longer be provided.
  • the projection light source may include a laser 101, and multiple laser beams respectively directed to multiple transmission regions of the light combining lens 103 are all emitted by the same laser 101.
  • the laser 101 may be a multi-chip Laser Diode (MCL) type laser.
  • MCL type laser may include multiple light-emitting chips arranged in an array and packaged in the same package, and each light-emitting chip can emit laser light independently.
  • the first laser beam and the second laser beam are respectively emitted from different light-emitting areas of the laser.
  • the first laser beam and the second laser beam may be respectively emitted by different light-emitting chips in the laser.
  • the multiple laser beams directed to the multiple transmission regions of the light combining lens 103 may also originate from different lasers, which is not limited in the embodiment of the present application.
  • the first light-emitting mode of the laser all the light-emitting chips in the laser emit light at the same time, so that multiple lasers can be emitted at the same time.
  • the brightness of the laser light emitted by the laser is relatively high, and the brightness of the laser light is still relatively high after being collected along the target direction through optical components such as the beam reducing part, the light combining lens, the condensing lens, and the fluorescent wheel.
  • the energy of the laser is relatively high, which can excite the first area on the fluorescent wheel to emit high-brightness fluorescence. In this way, the brightness of the projection screen obtained by mixing the laser and the fluorescent light is relatively high, thereby ensuring that the brightness of the formed projection screen is relatively high, and the projection effect of the projection device is better.
  • the light-emitting chip in the laser can emit light in a time-sharing manner.
  • the first part of the chip and the second part of the chip in the laser emit light alternately; the light-emitting time of the first part of the chip and the second part of the chip can be determined according to the switching timing of the first zone and the second zone in the fluorescent wheel.
  • the laser light emitted by the first part of the chip is used to target the first area, and the laser light emitted by the second part of the chip is used to target the second area.
  • the second laser beam L2 may be the laser emitted by the second part of the chip.
  • a pulse current can be used to power the light-emitting chip, and the pulse current has a higher energy, so the laser light-emitting chip can emit laser light 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 light-emitting time of each light-emitting chip in the laser may also be independent of the switching timing of the first zone and the second zone in the fluorescent wheel, which is not limited in the embodiment of the present application.
  • the first part of chips can also be subdivided into several parts of chips, and the laser light emitted by each part of the chips is used to irradiate a sub-area in the first area.
  • the number of the first part of the chip and the second part of the chip may be the same or different, which is not limited in the embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of still another projection light source provided in an embodiment of the present application.
  • the projection light source 10 further includes a beam splitting device 106 located on the light exit side of the laser 101.
  • the laser 101 can emit laser light to the beam splitting device, and the beam splitting device 106 can split the laser light emitted by the laser 101.
  • the multiple laser beams are then directed to the beam reducing part 102.
  • the light-emitting surface of the laser 101 can be perpendicular to the light-receiving surface of the fluorescent wheel 105, and the laser 101 and the beam splitting device 106 are arranged in sequence along the x direction, the beam splitting device 106, the beam reduction component 102, the light combining lens 103, The condensing lens 105 and the fluorescent wheel are arranged in sequence along the y direction.
  • the beam splitting device 106 can turn the transmission direction of the laser light emitted by the laser 101, for example, from the x direction to the y direction.
  • the embodiment of the present application takes as an example that the projection light source includes the beam-shrinking component 102 and further includes the beam splitting device 106.
  • the projection light source may also include the beam splitting device when the beam-shrinking component is not included, which is not limited in the embodiment of the present application. .
  • the beam splitting device 106 includes a plurality of beam splitters, and the distances of the plurality of beam splitters from the light exit surface of the laser 101 are all different.
  • the distance between the beam splitter and the light exit surface of the laser may include: the distance between any point on the surface of the beam splitter close to the laser and the light exit surface.
  • the multiple beamsplitters in the beam splitter can satisfy the following requirements: among any two beamsplitters, at least part of the orthographic projection of one beam splitter on the light exit surface of the laser is located outside of the orthographic projection of the other beam splitter on the light exit surface of the laser;
  • the minimum distance between the point in the one beam splitter and the laser may be greater than the maximum distance between the point in the other beam splitter and the laser. Therefore, the distance between all points on the surface of each beam splitter close to the laser and the laser is different from the distance between any point on the surface of other beam splitters close to the laser and the laser.
  • Each beam splitter is used to receive part of the laser light emitted by the laser 101 and reflect the part of the laser light to the beam reduction part 102 to divide the laser light emitted by the laser 101 into multiple laser beams directed to the beam reduction part 102.
  • each surface of the beam splitter may be a reflective surface, or only the surface facing the laser 101 in the beam splitter may be a reflective surface.
  • the distance between the laser beams obtained by splitting can be adjusted by adjusting the position of each beam splitter.
  • the number of beam splitters in the beam splitting device 106 is the same as the number of laser beams obtained by splitting the laser beam, and the number of transmission regions in the light combining lens 103 is the same.
  • the light splitting device can also implement light splitting in other ways, which is not limited in the embodiment of the present application.
  • the beam splitter 106 includes two beam splitters, which are beam splitters 1061 and 1062, respectively.
  • the laser 101 can emit only one laser beam, and the laser beam can be directed to the beam splitters 1061 and 1062, and each beam splitter can reflect part of the laser beam directed to the beam splitter, and the two beam splitters can The one laser beam is divided into a first laser beam L1 and a second laser beam L2.
  • the larger the distance between the two beamsplitters in the projection light source in the x-direction that is, the light-emitting direction of the laser 101
  • the distance between the laser beams emitted by each beam splitter can be adjusted by adjusting the distance between the beam splitters in the light exit direction of the laser 101, that is, the distance between the laser beams emitted to the beam reduction component 102 can be adjusted.
  • the laser 101 may simultaneously emit laser light to multiple beam splitters. Or it is also possible to emit laser light to different beam splitters at different times.
  • the laser includes a plurality of light-emitting chips, and each light-emitting chip corresponds to a beam splitter, and each light-emitting chip can emit light to the corresponding beam splitter.
  • the light-emitting chips that emit light in the lasers at different times are different, so that the laser can emit laser light to different beamsplitters at different times.
  • the light-emitting mode of the laser please refer to the above description of the two light-emitting modes of the laser with respect to FIG.
  • the projection light source may only include one reflector located on the light exit side of the laser, and in this case, the reflector is used to adjust the transmission direction of the laser light emitted by the laser.
  • the laser directly emits multiple laser beams along the x-direction, and the mirror can convert the transmission direction of the multiple laser beams from the x-direction to the y-direction, and then irradiate the beam shrinking component.
  • FIG. 6 is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
  • the laser 10 may further include a beam reduction component 102.
  • the projection light source 10 shown in FIG. 6 is compared with the projection light source shown in FIG. 2, and the projection light source shown in FIG. 7 is compared with the projection light source shown in FIG.
  • the structure is different. The specific difference is that the laser 101 only emits one laser beam, the light combining lens 103 has only one transmission area 1031, and the two reflection areas 1032a and 1032b in the light combining lens 103 are located on both sides of the transmission area 1031, respectively.
  • the laser beam emitted by the laser 101 is directed to the transmission area 1031, and then passes through the transmission area 1031 and is directed to the condensing lens 104.
  • the laser beam may pass through the optical axis h of the condensing lens 104.
  • the spot formed by the laser beam on the condensing lens 104 may be symmetrical with respect to the optical axis h of the condensing lens 104.
  • the optical axis of the beam shrinking component 102 and the optical axis of the condensing lens 104 may be collinear.
  • FIG. 8 is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
  • the projection light source 10 further includes: a mirror 107 located on the light-emitting side of the laser 101.
  • the laser 101 can emit laser light to the reflecting mirror 107, and the reflecting mirror 107 can reflect the laser light emitted from the laser 101 to the beam reducing part 102.
  • the light-emitting surface of the laser 101 can be perpendicular to the light-receiving surface of the fluorescent wheel 105, the laser 101 and the beam splitting device 106 are arranged in sequence along the x direction, the mirror 107, the beam reduction component 102, the light combining lens 103, The condensing lens 105 and the fluorescent wheel are arranged in sequence along the y direction.
  • the mirror 107 is used for turning the transmission direction of the laser light emitted by the laser 101, such as turning from the x direction to the y direction.
  • FIG. 9 is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
  • the projection light source 10 may further include a light collecting lens 108 and a light homogenizing part 109.
  • FIG. 9 is based on the projection light source shown in FIG. 5.
  • the light combining lens 103, the light collecting lens 108 and the light homogenizing part 109 may be arranged in sequence along the target direction.
  • the light combining lens 103 can reflect the light emitted from the condensing lens 104 in the target direction to the light collecting lens 108, and then the light collecting lens 108 can condense the incident light to the light homogenizing part 109, and the light homogenizing part 109 can reduce the incident light. After being homogenized, the light is directed to subsequent parts to form a projection image.
  • the light homogenizing component 109 may be a light pipe or a fly-eye lens. In FIG. 9, the light homogenizing component 109 is a light pipe as an example.
  • the light combining lens includes a transmission area and a reflection area
  • the fluorescent wheel includes a first area and a second area
  • the laser light emitted by the laser can be directed through the transmission area of the light combining lens.
  • the fluorescent wheel further excites the first area to emit fluorescence when it is directed to the first area of the fluorescent wheel, and the fluorescence is reflected on the light combining lens along the target direction.
  • the laser is directed to the second zone of the fluorescent wheel, it is reflected by the second zone to the round light lens, and then is reflected by the reflection zone of the light combining lens along the target direction. In this way, without the relay circuit system, the combination of laser light and fluorescence can be realized only by the light combining lens, and the volume of the projection light source is small.
  • the second area of the fluorescent wheel is provided with a light diffusion part.
  • the laser When the laser is directed to the second area of the fluorescent wheel, it can be diffused by the light diffusion part and then directed to the light combining lens, which enlarges the time when the laser is emitted from the fluorescent wheel.
  • the range of light exit angles Since the light emission angle range of the fluorescent light excited in the first zone is relatively large, it can ensure that the light output angle range of the laser and the fluorescent light is small, and the mixing effect of the laser and the fluorescent light is better, and the light forming with the better light mixing effect is adopted.
  • the projection image so that the brightness uniformity and color uniformity of the combined light spot can improve the display effect of the projection image.
  • FIG. 10 is a schematic structural diagram of a projection device provided by an embodiment of the present application.
  • the projection device may further include a light valve 110 and a lens 111.
  • the light homogenizing component 109 in the projection light source 10 can direct light to the light valve 110.
  • the light valve 110 can modulate the incident light and then project it to the lens 111.
  • the lens 111 can project the incident light to form a projection image.
  • the light valve 110 may include a plurality of reflective sheets, and each reflective sheet can be used to form a pixel in the projection image, and the light valve 110 can make the pixel that needs to be displayed in a bright state correspond to the reflective sheet according to the image to be displayed.
  • the laser light is reflected to the lens 111 to realize the modulation of the light.
  • the lens 111 may include a plurality of lenses (not shown in the figure). Regarding the arrangement of the structures in the projection device shown in FIG. 10, the lenses in the lens 111 may be arranged in order in a direction perpendicular to the paper surface outward.
  • the laser light emitted from the light valve 110 may be sequentially shot to the screen through a plurality of lenses in the lens 111, so as to realize the projection of the laser light by the lens 111 and realize the display of the projection screen.
  • the projection device may also include an illumination lens group 112 located between the light homogenizing part 109 and the light valve 110, and the laser light emitted after being homogenized by the light homogenizing part 109 can be emitted through the illumination lens group 112 To the light valve 110.
  • the illumination lens group 112 may include a reflective sheet F, a lens T, and a total internal reflection (TIR) prism L.
  • TIR total internal reflection
  • the laser light emitted by the homogenizing component 109 can be directed to the reflective sheet F, which can reflect the incident light to the convex lens T, and the convex lens T can condense the incident laser light to the total internal reflection prism L.
  • the total internal reflection prism L will The incident laser light is reflected to the light valve 110.
  • the light combining lens includes a transmission area and a reflection area
  • the fluorescent wheel includes a first area and a second area.
  • the laser light emitted by the laser can be transmitted through the light combining lens.
  • the area is directed to the fluorescent wheel, and when directed to the first area of the fluorescent wheel, the first area is excited to emit fluorescence, and the fluorescence is reflected on the light combining lens along the target direction.
  • the laser is directed to the second zone of the fluorescent wheel, it is reflected by the second zone to the round light lens, and then is reflected by the reflection zone of the light combining lens along the target direction.
  • the combination of laser light and fluorescence can be realized only by the reflection of the fluorescent wheel and the reflection of the light combining lens, and the volume of the projection light source is small.
  • the second area of the fluorescent wheel is provided with a light diffusion part.
  • the laser When the laser is directed to the second area of the fluorescent wheel, it can be diffused by the light diffusion part and then directed to the light combining lens, which enlarges the time when the laser is emitted from the fluorescent wheel.
  • the range of light exit angles Due to the large angle range of the excited fluorescence in the first zone, it can ensure that the angle of the laser and fluorescence is small, the mixing effect of laser and fluorescence is better, and the brightness uniformity and color of the combined light spot are uniform
  • the performance can be improved, and the projection screen is formed by using the light with better light mixing effect, and the display effect of the projection screen is also better.
  • the light loss of the blue light incident on the light combining lens can be reduced by reducing the area of the transmission area, or by providing only one transmission area, so as to meet the requirements of the light efficiency of the system.
  • 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.
  • the term "at least one of 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.
  • the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
  • the term “at least one” refers to one or more, and the term “plurality” refers to two or more, unless expressly defined otherwise.

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Abstract

一种投影光源(10)和投影设备，属于光电技术领域。投影光源(10)中，合光镜片(103)包括多个透射区(1031a、1031b)和多个反射区(1032a、1032b)；荧光轮(105)包括第一区(1051)和设置有光扩散部的第二区(1052)；激光器(101)射出多束激光，多束激光(101)分别射向多个透射区(1031a、1031b)，并通过透射区(1031a、1031b)射向会聚透镜(104)；任两束激光在会聚透镜(104)上形成的光斑关于会聚透镜(104)的光轴(h)均不对称；会聚透镜(104)用于将射入的激光会聚向荧光轮(105)；第一区(1051)在被激光照射时被激发出荧光，荧光穿过会聚透镜(104)射向反射区(1032a、1032b)；第二区(1052)在被激光照射时，光扩散部对激光进行扩散，以使扩散后的激光穿过会聚透镜(104)射向反射区(1032a、1032b)；反射区(1032a、1032b)用于沿目标方向反射射入的光。

Description

投影光源和投影设备
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202010577387.2，发明名称为“光源组件和投影设备”的中国专利申请的，以及在2021年6月18日提交中国专利局、申请号为202110678499.1，发明名称为“投影光源和投影设备”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，特别涉及一种投影光源和投影设备。
背景技术
随着科技的不断发展，投影设备越来越多的应用于人们的工作和生活中。目前，投影设备主要包括光源系统、光机系统和镜头，光源系统位于光机系统的入光侧，镜头位于光机系统的出光侧，光源系统出射光束至光机系统，经光机系统对该光束进行处理后出射至镜头，以便于镜头能够出射光束至投影屏幕，进而在投影屏幕上实现画面的显示。
相关技术中，对于投影设备中投影光源的小型化的要求越来越高。
发明内容
本申请实施例一方面，提供了一种投影光源，所述投影光源包括：激光器、合光镜片、会聚透镜和荧光轮；所述合光镜片包括多个透射区和多个反射区；所述荧光轮包括第一区和第二区，所述第二区上设置有光扩散部；
所述激光器用于射出多束激光，所述多束激光分别射向所述多个透射区，所述透射区用于将射入的激光透射向所述会聚透镜；
所述多束激光中任两束激光在所述会聚透镜上形成的光斑关于所述会聚透镜的光轴均不对称；所述会聚透镜用于将射入的激光会聚向所述荧光轮；
所述荧光轮被配置为绕转轴旋转，在所述荧光轮的旋转过程中所述荧光轮中的不同区接受会聚后的激光的照射；
当所述会聚后的激光射向所述第一区时，所述第一区被激发出荧光，以使所述荧光穿过所述会聚透镜射向所述反射区；
当所述会聚后的激光射向所述第二区时，所述光扩散部对所述会聚后的激光进行扩散，以使扩散后的激光穿过所述会聚透镜射向所述反射区；
所述反射区用于沿目标方向反射射入的光。
另一方面，提供了一种投影光源，所述投影光源包括：激光器、合光镜片、会聚透镜和荧光轮；所述合光镜片包括：一个透射区和分别位于所述透射区两侧的两个反射区；所述荧光轮包括第一区和第二区，所述第二区上设置有光扩散部；
所述激光器用于发出激光，所述激光射向所述透射区，所述透射区用于将射入的激光透射向所述会聚透镜；
所述会聚透镜用于将射入的激光会聚向所述荧光轮，射向所述会聚透镜的激光经过所述会聚透镜的光轴；
所述荧光轮被配置为绕转轴旋转，在所述荧光轮的旋转过程中所述荧光轮中的不同区接受会聚后的激光的照射；
当所述会聚后的激光射向所述第一区时，所述第一区被激发出荧光，以使所述荧光穿过所述会聚透镜射向所述反射区；
当所述会聚后的激光射向所述第二区时，所述光扩散部对所述会聚后的激光进行扩散，以使扩散后的激光穿过所述会聚透镜射向所述反射区；
所述反射区用于沿目标方向反射射入的光。
再一方面，提供了一种投影设备，所述投影设备包括：上述的投影光源，以及光阀和镜头；
所述投影光源用于向所述光阀发出激光，所述光阀用于将射入的激光进行调制后射向所述镜头，所述镜头用于对射入的激光进行投射以形成投影画面。
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是相关技术提供的一种投影光源的结构示意图；
图2是本申请实施例提供的一种投影光源的结构示意图；
图3是本申请实施例提供的一种荧光轮的结构示意图；
图4是本申请实施例提供的另一种投影光源的结构示意图；
图5是本申请实施例提供的再一种投影光源的结构示意图；
图6是本申请实施例提供的又一种投影光源的结构示意图；
图7是本申请另一实施例提供的一种投影光源的结构示意图；
图8是本申请另一实施例提供的另一种投影光源的结构示意图；
图9是本申请另一实施例提供的再一种投影光源的结构示意图；
图10是本申请实施例提供的一种投影设备的结构示意图。
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。
图1是相关技术提供的一种投影光源的结构示意图。如图1所示，该投影光源包括：激光器001、二向色镜002、第一准直透镜组003、荧光轮004、中继回路系统以及光导管005。二向色镜002、第一准直透镜组003和荧光轮004位于激光器001的出光侧，且沿激光器001的出光方向依次排布。中继回路系统包括：第二准直透镜组006、第一反射镜片007、第一准直透镜008、第二反射镜片009、第二准直透镜010、第三反射镜片011和第三准直透镜012。其中，第二准直透镜组006和第一反射镜片007位于荧光轮004远离激光器001的一侧，且沿激光器001的出光方向(如图1中的y方向)依次排布。第一反射镜片007、第一准直透镜008和第二反射镜片009沿目标方向(如图1中的x方向)的反方向依次排布，该目标方向垂直于激光器001的出光方向。第二反射镜片009、第二准直 透镜010和第三反射镜片011沿激光器001的出光方向的反方向依次排布。第三反射镜片011、第三准直透镜012、二向色镜002以及光导管005沿目标方向依次排布，且二向色镜002朝光导管005倾斜。该光导管005位于投影光源的出光口。
激光器001可以发出蓝色激光，该二向色镜002可以透过蓝光。激光器001发出的该蓝色激光可以穿过二向色镜002和第一准直透镜组003射向荧光轮004。该荧光轮004包括荧光区和透射区(图1中未示出)，该荧光区具有荧光材料，该荧光材料可以在蓝色激光的照射下发出荧光(如红色荧光和绿色荧光)。该荧光轮004可以绕平行于激光器001的出光方向的转轴转动，荧光轮004在转动时蓝色激光可以射向该荧光轮004的不同区域。当该蓝色激光射向荧光轮004的透射区时，该蓝色激光可以穿过该透射区以及第二准直透镜组006射向第一反射镜片007，进而被第一反射镜片007反射以穿过第一准直透镜008射向第二反射镜片009。接着该蓝色激光可以被第二反射镜片009反射以穿过第二准直透镜010射向第三反射镜片011，且被第三反射镜片011反射以穿过第三准直透镜012以及二向色镜002射向光导管005。随着荧光轮004的转动，当激光器001发出的蓝色激光射向荧光轮004的荧光区时，该蓝色激光可以激发该荧光区的荧光材料向二向色镜002发出荧光。该二向色镜002还可以反射红光和绿光，故该荧光可以在二向色镜002上再次反射以射向光导管005。如此一来，光导管005可以接收荧光和蓝色激光，该荧光和蓝色激光可以在光导管005的作用下混合，进而会聚透镜可以将混合后的光线用于投影设备的投射。
图2是本申请实施例提供的一种投影光源的结构示意图。如图2所示，该投影光源10可以包括：
激光器101、合光镜片103、会聚透镜104和荧光轮105。合光镜片103包括多个透射区和多个反射区，该多个透射区和多个反射区可以一一交替排布。如合光镜片103包括第一透射区1031a、第二透射区1031b、第一反射区1032a和第二反射区1032b，第一反射区1032a、第一透射区1031a、第二反射区1032b和第二透射区1031b可以沿合光镜片的延伸方向依次排布。荧光轮105包括第一区和第二区，该第二区上设置有光扩散部(图2中未标出第一区、第二区及光扩散部)，荧光轮105不设置有透光区。该第一区可以为荧光区，该第二区可以为反射区。该第一区可以在激光的照射下被激发出荧光，该第二区可以对射入的激光进行扩散，且反射射入的激光。
激光器101、合光镜片103、会聚透镜104和荧光轮105可以沿辅助方向(如图2中的y方向)依次排布。激光器101可以射出多束激光，该多束激光分别射向合光镜片103中的多个透射区，每个透射区可以将射入的激光透射向会聚透镜104。该多束激光中任两束激光在会聚透镜104上形成的光斑关于会聚透镜104的光轴h均不对称。可选地，该多束激光并不经过会聚透镜104的光轴。
示例地，激光器101发出的多束激光包括第一激光束L1和第二激光束L2。该第一激光束L1可以分别射向第一透射区1031a，并穿过第一透射区1031a射向会聚透镜104；该第二激光束L2射向第二透射区1031b，并穿过第二透射区1031b射向会聚透镜104。该第一激光束L1在会聚透镜104上形成的光斑与第二激光束L2在会聚透镜104上形成的光斑，关于会聚透镜104的光轴h不对称。换言之，会聚透镜104上第一激光束L1照射的镜面位置与第二激光束L2照射的镜面位置，关于会聚透镜104的光轴h不对称。如图2中该第一激光光束L1相比第二激光光束L2更靠近光轴h。可选地，该第一激光束L1在会聚 透镜104上形成的光斑与第二激光束L2在会聚透镜104上形成的光斑中，也不存在关于光轴h对称的位置。
会聚透镜104可以将射入的激光会聚向荧光轮105。荧光轮105可以绕转轴Z旋转，在荧光轮105的旋转过程中，荧光轮105中的不同区接受会聚后的激光(也即是从会聚透镜104射出的激光)的照射。当会聚后的激光射向荧光轮105的第一区时，该第一区被激发出荧光，该荧光的颜色与射入的荧光轮105的激光的颜色不同。该荧光可以穿过会聚透镜104射向合光镜片103，如射向合光镜片103中的反射区。当会聚后的激光射向荧光轮105中的第二区时，该第二区上设置的光扩散部可以对会聚后的激光进行扩散，进而扩散后的激光可以再次穿过会聚透镜104射向合光镜片103，如射向合光镜片103的反射区。合光镜片103的反射区可以沿目标方向(如图2中的x方向)反射由会聚透镜104射向该反射区的光；也即该反射区可以将由会聚透镜104射向该反射区的激光和荧光均沿目标方向反射，以实现该激光和荧光的混光。
本申请实施例中，辅助方向(y方向)与目标方向(x方向)相交。图2以本申请实施例以辅助方向与目标方向垂直为例，可选地，该辅助方向与目标方向的夹角也可以为钝角或锐角。激光器101发出的第一激光束L1和第二激光束L2可以为独立的两束光，或者也可以为一整束激光中的两部分，本申请实施例不做限定。可选地，激光器101可以不仅发出两束激光，也可以发出三束激光、四束激光甚至更多，本申请实施例对激光器发出的激光光束的个数不做限定。本申请实施例中所述的第一激光束和第二激光束可以为激光器发出的多束激光中的任意两束激光，对于激光器发出其他个数束激光的情况均可以参考对该第一激光束和第二激光束的介绍，本申请实施例不再赘述。可选地，激光器可以包括多排发光芯片，激光器发出的每束激光可以由一排或多排发光芯片发出。
需要说明的是，由于荧光轮105上的第一区在激光的激发下发出荧光时，该第一区中被激光照射的区域向各个方向发光，而荧光轮105远离会聚透镜104的一侧不透光，故第一区中被激光照射的区域的发光角度可以大致在0～180度范围内，该区域射出荧光时类似朗伯体。第一区发出的荧光在会聚透镜上形成的光斑可以接近于覆盖会聚透镜的整个镜面。本申请实施例中，第二区上设置有光扩散结构，如此激光在射向第二区后，该激光被第二区反射且被光扩散结构扩散，该激光的出射角度范围相对于入射角度范围增大。激光在射向第二区后可以朝较大的范围出射，以射向会聚透镜，此时该第二区上被激光照射的位置也相当于一个类似朗伯体的点光源。可选地，该激光经过第二区反射后，在会聚透镜上形成的光斑可以接近于覆盖会聚透镜的整个镜面。如此，可以缩小荧光轮中第一区射出的荧光的出光角度范围与第二区射出的激光的出光角度范围的差异，进而可以优化该荧光与该激光的混光效果，具体地，经荧光轮反射后的蓝光和荧光的光轴重合度和光斑重合度均可以提高，从而合光光斑的亮度均匀性和颜色均匀性均可改善。
综上所述，本申请实施例提供的投影光源中，合光镜片包括透射区和反射区，荧光轮包括第一区和第二区，激光器发出的激光可以通过合光镜片的透射区射向荧光轮，进而在射向荧光轮的第一区时激发该第一区发出荧光，该荧光在合光镜片上沿目标方向反射。激光在射向荧光轮的第二区时，被该第二区反射回合光镜片，再被合光镜片的反射区沿目标方向反射。如此不设置中继回路系统，仅通过合光镜片就可实现激光与荧光的合光，该投影光源的体积较小。
另外，荧光轮的第二区上设置有光扩散部，激光在射向荧光轮的第二区时可以经该光 扩散部扩散后再射向合光镜片，扩大了该激光从荧光轮出射时的出光角度范围。由于第一区被激发出的荧光的出光角度范围较大，因此可以保证激光与荧光的出光角度范围相差较小，激光与荧光的混光效果更好，合光光斑的亮度均匀性和颜色均匀性均可改善，采用该混光效果更好的光形成投影画面，该投影画面的显示效果也较好。
基于上述实施例的投影光源架构，下面将结合附图对荧光轮105进行介绍：
图3是本申请实施例提供的一种荧光轮的结构示意图，且图3示出的是图2中荧光轮的俯视图。请结合图2与图3，荧光轮105可以绕转轴Z转动，以使从会聚透镜104会聚至荧光轮105的激光(如包括第一激光束和第二激光束)在第一区1051和第二区1052之间切换。可选地，该荧光轮105可以呈圆环状，该圆环的环面可以与辅助方向(y方向)相交，该转轴Z可以平行于y方向，该转轴Z可以经过该圆环的圆心且垂直于圆环的环面。可选地，荧光轮105可以包括反光基板，该反光基板上部分区域可以设置有荧光材料(如荧光粉)，部分区域可以设置有光扩散部。设置有荧光材料的区域即为荧光轮105的第一区1051，设置有光扩散部的区域即为荧光轮105的第二区1052。每种颜色的荧光材料可以被激发出该种颜色的激光。
激光射向第一区1051时，可以激发其上的荧光粉发出对应颜色的荧光，该荧光与激光的颜色不同，该荧光可以被反光基板反射向会聚透镜104。示例地，荧光轮105的第一区中可以至少设置有绿色荧光材料。该第一区中也可以设置有红色荧光材料和黄色荧光材料中的至少一种。荧光轮105的第一区发出的荧光可以为绿色荧光、红色荧光或者其他颜色的荧光，如黄色荧光。可选地，该荧光也可以为一种激光。该荧光的颜色与激光器101发出的激光的颜色不同，如激光器101可以发出蓝色激光。可选地，激光器101发出的激光的颜色也可以为其他颜色，本申请实施例不做限定。
示例地，本申请实施例中荧光轮105中的第一区1051可以包括至少一个子区域，每个子区域可以设置一种颜色的荧光材料。当该第一区1051包括多个子区域时，该多个子区域与第二区1052可以呈圆周排布。如该第一区1051可以包括两个子区域G1和G2。荧光轮105可以绕转轴Z沿w方向或w方向的反方向转动。如该两个子区域可以分别包括绿色荧光材料和红色荧光材料，或者该两个子区域可以分别包括绿色荧光材料和黄色荧光材料，或者该两个子区域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，本申请实施例仅以第一区中各个子区域的面积相等，且第二区的面积与任一子区域的面积也相等为例进行示意。可选地，荧光轮的第一区中各个子区域和第二区的面积也可以不同，各个子区域和荧光轮的第二区的面积可以根据其射出的光线在所需得到的光中的占比进行设计。
激光射向荧光轮105的第二区1052时，可以在其上的光扩散部进行扩散，并被反光基板反射向会聚透镜104。可选地，荧光轮105中的第二区上设置的光扩散部可以为具有粗糙表面的部件，如该光扩散部可以包括扩散片或者漫反射体。该漫反射体可以为漫反射涂层，或者漫反射板。示例地，可以反光基板中第二区1052对应的区域贴附扩散片，或者涂覆漫反射涂层。可选地，该扩散片可以为大角度扩散片，也即是该扩散片对光线的扩散角度可以大于角度阈值；该漫反射涂层可以为高反射率的漫反射涂层，也即是该漫反射涂层对光线的反射率可以大于反射率阈值。可选地，由于漫反射体可以对光线直接进行反射，若该光扩散部为漫反射体，则荧光轮105的基板中的第二区1052所在处也可以不具备反光功能。
从荧光轮105的第一区1051射出的荧光以及从荧光轮105的第二区1052射出的激光，均可以在较大的出光角度范围内射向会聚透镜104。可选地，该激光与荧光在经过会聚透镜104后可以均呈平行光。由于荧光轮中该第一区与第二区在出射光时均类似于朗伯体，朝会聚透镜整面出光，会聚透镜可以将射入的光进行准直，以使该光以一整束类似于平行光的形式出射。可选地，本申请实施例以会聚透镜104仅为一个凸透镜为例，可选地，该会聚透镜104也可以由多个透镜组成，以提高会聚透镜对光的会聚效果。
下面结合附图对合光镜片103进行介绍：
请继续参考图2，合光镜片103的镜面可以倾斜设置，以保证将会聚透镜射出的光线沿目标方向反射。从会聚透镜104射向合光镜片103的光(如激光或荧光)类似于平行光，且可以从会聚透镜104整面出射。射向合光镜片103的光不仅射向合光镜片103中的反射区，还可以射向合光镜片103中的透射区。合光镜片103中的反射区可以反射该激光和荧光，对于该反射区是否反射颜色与该激光和荧光均不同的光，本申请实施例不做限定。如该反射区可以为全光谱高反射膜，也即对所有颜色的光均进行反射。合光镜片103可以具有相对的第一面和第二面，该第一面可以朝向激光器101，该第二面可以朝向会聚透镜104。该第一面也即是合光镜片103的入光面，该第二面也即是合光镜片103的出光面。可选地，从会聚透镜104射向合光镜片103的光可以在该第二面便被反射。
可选地，合光镜片103中的透射区可以具有二向色性。该透射区可以透射荧光轮105的第二区1052反射的激光(也是激光器101发出的激光)，且反射荧光轮105的第一区1051被激发出的荧光。可选地，该透射区也可以反射与该激光颜色不同的所以颜色的光。示例地，该透射区可以用于透射蓝光，且反射红光和绿光。如此荧光轮105的第一区1051被激发出的荧光在射向合光镜片103后可以被全部沿目标方向反射，以用于后续形成投影画面，保证了荧光的利用率。可选地，合光镜片103中的透射区也可以针对所有光均透射。
可选地，合光镜片103中透射区的面积可以小于反射区的面积。如合光镜片103中所有透射区的总面积可以小于所有反射区的总面积，每个透射区的面积也可以小于其相邻的反射区的面积，或者也可以小于每个反射区的面积。可选地，每个透射区的面积可以小于或等于该透射区相邻的反射区的面积的1/4。可选地，合光镜片103中各个透射区的面积相等，各个反射区的面积也相等；或者各个透射区的面积也可以均不同，各个反射区的面积也可以均不同。需要说明的是，合光镜片103中的透射区的面积仅需满足能透过射入的激光即可。
图4是本申请实施例提供的另一种投影光源的结构示意图。如图4所示，在图2的基础上，激光器10还可以包括缩束部件102。激光器101射出的激光可以经缩束部件102缩束后，再射向合光镜片103中的透射区。示例地，如图4所示，缩束部件102可以包括沿辅助方向依次排布的一个凸透镜1021和一个凹透镜1022，该凸透镜1021与该凹透镜1022的光轴可以共线。可选地，缩束部件102的光轴与会聚透镜104的光轴可以不共线。如激光器101发出的第一激光束L1和第二激光束L2可以关于缩束部件102的光轴对称，以保证缩束部件102对该两个激光束的缩束程度相同。或者缩束部件102的光轴与会聚透镜104的光轴也可以共线，本申请实施例不做限定。
激光器101发出的激光束在经过缩束部件102缩束后，该激光束可以变细，该激光束越细，合光镜片102中透射区的面积便可以越小。可选地，该缩束部件102为高倍率的望远镜系统，可以对光束进行较大程度的缩束；如此合光镜片103中的透射区的面积可以较 小。进而，即使从会聚透镜104射出的激光也射向合光镜片103中的透射区，并从该透射区透过，由于该透射区的面积很小，也仅会存在很少的激光被浪费，激光的利用率仍较高，光损较小。
可选地，合光镜片103靠近缩束部件102的表面(也即第一表面)设置有增透膜，以增加合光镜片103的激光透过率。如该增透膜可以仅针对激光器发出的激光(如蓝色激光)增加透过率，该增透膜为蓝光增透膜；或者该增透膜可以针对全光谱的光线增加透过率，该增透膜为全光谱增透膜。合光镜片103靠近缩束部件102的表面可以整面设置增透膜。可选地，由于合光镜片103中仅透射区用于透射激光，故也可以仅在透射区设置增透膜。如此可以保证从合光镜片103透过的激光较多，激光的损耗较少，提高激光的利用率。
可选地，合光镜片103靠近缩束部件102的表面(也即第一表面)设置有光扩散结构。示例地，该光扩散结构可以为扩散片，或者由多个微棱镜结构组成的结构，或者包括多个平行的条状凸起。该光扩散结构为小角度扩散结构，该光扩散结构对光线的扩散角度小于角度阈值。该光扩散结构可以将射向合光镜片103的激光进行扩散，以保证从合光镜片103射出的激光能量分布均匀性较高，进而该激光射向荧光轮105的第一区后，第一区被激发发出的荧光的能量分布较为均匀。
本申请实施例以射向合光镜片103的光束的数量等于合光镜片103中透射区的数量，且合光镜片103中透射区与反射区的数量相等为例。可选地，合光镜片103中的透射区和反射区的个数也可以大于激光器发出的激光束的数量。如即使激光器发出两束激光，合光镜片也可以包括三个反射区，如在图2所示的合光镜片的基础上，第二透射区1021b的右侧还可以再具有一个反射区，以使从会聚透镜104射出的光尽可能多地被合光镜片103沿目标方向反射，保证光线的利用率。可选地，合光镜片103在荧光轮105上的正投影可以完全覆盖会聚透镜104在荧光轮105上的正投影。
在合光镜片的一种可选实现方式中，可以在透光基板上不同区域设置功能膜层，以得到合光镜片中的透射区和反射区。示例地，对于反射区，合光镜片103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的反射膜。该镀膜可以位于合光镜片103靠近缩束部件102的一侧，也可以位于合光镜片103远离缩束部件102的一侧，本申请实施例不做限定。对于透射区，合光镜片103靠近缩束部件102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，反射红光和绿光。在合光镜片的另一种可选实现方式中，合光镜片103的反射区也可以直接采用反光材料制作而成。可选地，合光镜片103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。此时，可以不再设置该镀膜和二向色膜。
下面结合附图对激光器101进行介绍：
本申请实施例中，投影光源可以包括一个激光器101，分别射向合光镜片103的多个透射区的多束激光均由同一激光器101发出。激光器101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地发出激光。该第一激光束和第二激光束分别由该激光器不同的发光区域射出，如该第一激光束和第二激光束可以分别由该激光器中的不同发光芯片发出。可选地，射向合光镜片103的多个透射区的多束激光也可以来源于不同的激光器，本申请实施例不做限定。
在激光器的第一种发光方式中，激光器中的所有发光芯片同时发光，进而实现同时发 出多束激光。此种情况中，激光器发出的激光的亮度较高，该激光在通过缩束部件、合光镜片、会聚透镜和荧光轮等光学部件被沿目标方向收集之后亮度仍较高。且该激光的能量较高，可以激发荧光轮上的第一区发出亮度较高的荧光。如此激光与荧光混合所得的用于形成投影画面的光亮度较高，进而可以保证形成的投影画面的亮度较高，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，激光器中的发光芯片可以分时发光。如激光器中第一部分芯片和第二部分芯片交替发光；第一部分芯片和第二部分芯片的发光时间可以根据荧光轮中第一区与第二区的切换时序确定。如第一部分芯片发出的激光用于射向第一区，第二部分芯片发出的激光用于射向第二区。示例地，图2中激光器发出的第一激光束L1可以为第一部分芯片发出的激光，第二激光束L2可以为第二部分芯片发出的激光。此种情况中，由于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。可选地，激光器中各个发光芯片的发光时间也可以与荧光轮中第一区和第二区的切换时序无关，本申请实施例不做限定。
可选地，第一部分芯片也可以再分为几部分芯片，每部分芯片发出的激光用于射向第一区中的一个子区域。可选地，第一部分芯片与第二部分芯片的数量可以相同，或者也可以不同，本申请实施例不做限定。
上述实施例以激光器101的出光面与荧光轮105的受光面平行，激光器101直接向缩束部件102发出多束激光为例进行介绍。可选地，图5是本申请实施例提供的再一种投影光源的结构示意图。如图5所示，在图4的基础上，投影光源10还包括位于激光器101的出光侧的分光器件106，激光器101可以向该分光器件发出激光，分光器件106可以将激光器101发出的激光分为多束激光后射向缩束部件102。可选地，此种情况下激光器101的出光面可以与荧光轮105的受光面垂直，激光器101与分光器件106沿x方向依次排布，分光器件106、缩束部件102、合光镜片103、会聚透镜105和荧光轮沿y方向依次排布。分光器件106可以将激光器101射出的激光的传输方向进行转折，如由x方向转折为y方向。本申请实施例以在投影光源包括缩束部件102的基础上再包括分光器件106为例，可选地，投影光源也可以在不包括缩束部件时包括分光器件，本申请实施例不做限定。
示例地，分光器件106包括多个分光镜，该多个分光镜距激光器101的出光面的距离均不同。分光镜与激光器的出光面的距离可以包括：该分光镜靠近激光器的表面中的任一点与该出光面的距离。分光器件中该多个分光镜可以满足：任意两个分光镜中，一个分光镜在激光器的出光面上的至少部分正投影，位于另一个分光镜在激光器的出光面上的正投影之外；该一个分光镜中的点与激光器的最小间距可以大于另一个分光镜中的点与激光器的最大间距。故每个分光镜靠近激光器的表面中所有点与激光器的距离，均不同于其他分光镜靠近激光器的表面中任一点与激光器的距离。
每个分光镜用于接收激光器101发出的激光中的部分激光，并向缩束部件102反射该部分激光，以将激光器101发出的激光分为射向缩束部件102的多束激光。可选地，分光镜的各个表面可以均为反光面，或者分光镜中也可以仅朝向激光器101的表面为反光面。可选地，可以通过调整各个分光镜的位置，调整分束得到的各束激光之间的距离。分光器件106中分光镜的个数与对激光分束所得的激光束的数量相同，且与合光镜片103中的透射区的数量相同。可选地，分光器件也可以通过其他方式实现分光，本申请实施例不做限 定。
示例地，如图5所示，分光器件106包括两个分光镜，分别为分光镜1061和1062。激光器101可以仅发出一束激光，该一束激光可以射向分光镜1061和1062，每个分光镜可以分别反射该一束激光中射向该分光镜的部分激光，进而该两个分光镜可以将该一束激光分成第一激光束L1和第二激光束L2。如图5所示，投影光源中两个分光镜在x方向(也即激光器101的出光方向)上的间距越大，对激光器101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分光镜在激光器101的出光方向上的间距，来调整各个分光镜射出的各束激光之间的间距，也即调整射向缩束部件102的各束激光的间距。
可选地，对于图5的情况，激光器101可以同时向多个分光镜均发出激光。或者也可以在不同时间向不同分光镜发出激光。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分光镜，每个发光芯片能够向对应的分光镜发光。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分光镜发出激光。对于激光器的发光方式，请参考上述针对图2对激光器的两种发光方式的介绍，本申请实施例不再赘述。
可选地，投影光源可以仅包括位于激光器的出光侧的一个反射镜，此时，该反射镜用于调整激光器发出的激光的传输方向。此种情况下，激光器直接沿x方向发出多束激光，反射镜可以将该多束激光的传输方向由x方向转换为y方向，进而射向缩束部件。
图6是本申请实施例提供的又一种投影光源的结构示意图。图7是本申请另一实施例提供的一种投影光源的结构示意图。如图7所示，在图6的基础上，激光器10还可以包括缩束部件102。图6所示的投影光源10与图2所示的投影光源相比，以及图7所示的投影光源与图4所示的投影光源相比，仅激光器101发出的激光形式以及合光镜片103的结构不同。不同之处具体在于：激光器101仅发出一束激光，合光镜片103仅具有一个透射区1031，且合光镜片103中的两个反射区1032a和1032b分别位于该透射区1031的两侧。激光器101发出的该一束激光射向透射区1031，进而穿过透射区1031射向会聚透镜104。该一束激光可以经过会聚透镜104的光轴h，如该束激光在会聚透镜104上形成的光斑可以关于会聚透镜104的光轴h对称。需要说明的是，对于图6所示的投影光源10在该不同之外与图2相同的其他部分，以及图7所示的投影光源10在该不同之外与图4相同的其他部分，如缩束部件102、合光镜片103、会聚透镜104和荧光轮105的排布方式，激光的传输方式，荧光轮105的运动方式，合光镜片103中透射区与反射区的特性，激光器101的反光方式等，均请参考针对图2和图4的相关介绍，本申请实施例不再赘述。可选地，对于图7所示的投影光源，缩束部件102的光轴与会聚透镜104的光轴可以共线。
图8是本申请另一实施例提供的另一种投影光源的结构示意图。如图8所示，在图7的基础上，投影光源10还包括：位于激光器101的出光侧的反光镜107。激光器101可以向反光镜107发出激光，反光镜107可以向缩束部件102反射激光器101发出的激光。可选地，此种情况下激光器101的出光面可以与荧光轮105的受光面垂直，激光器101与分光器件106沿x方向依次排布，反光镜107、缩束部件102、合光镜片103、会聚透镜105和荧光轮沿y方向依次排布。反光镜107用于将激光器101射出的激光的传输方向进行转折，如由x方向转折为y方向。
图9是本申请另一实施例提供的一种投影光源的结构示意图。如图9所示，在上述任一投影光源的基础上，投影光源10还可以包括收光透镜108和匀光部件109，图9以图5 所示的投影光源为基础进行示意。合光镜片103、收光透镜108和匀光部件109可以沿目标方向依次排布。合光镜片103可以将从会聚透镜104射出的光沿目标方向反射向收光透镜108，进而收光透镜108可以将射入的光会聚至匀光部件109，匀光部件109可以将射入的光进行匀化后射向后续的部件中，以用于形成投影画面。示例地，匀光部件109可以为光导管或复眼透镜，图9以匀光部件109为光导管为例。
综上所述，本申请实施例提供的投影光源中，合光镜片包括透射区和反射区，荧光轮包括第一区和第二区，激光器发出的激光可以通过合光镜片的透射区射向荧光轮，进而在射向荧光轮的第一区时激发该第一区发出荧光，该荧光在合光镜片上沿目标方向反射。激光在射向荧光轮的第二区时，被该第二区反射回合光镜片，再被合光镜片的反射区沿目标方向反射。如此不设置中继回路系统，仅通过合光镜片就可实现激光与荧光的合光，该投影光源的体积较小。
另外，荧光轮的第二区上设置有光扩散部，激光在射向荧光轮的第二区时可以经该光扩散部扩散后再射向合光镜片，扩大了该激光从荧光轮出射时的出光角度范围。由于第一区被激发出的荧光的出光角度范围较大，因此可以保证激光与荧光的出光角度范围相差较小，激光与荧光的混光效果更好，采用该混光效果更好的光形成投影画面，从而合光光斑的亮度均匀性和颜色均匀性均可改善该投影画面的显示效果也较好。
图10是本申请实施例提供的一种投影设备的结构示意图。如图10所示，在图9的基础上，投影设备还可以包括光阀110和镜头111。投影光源10中的匀光部件109可以将光射向光阀110，光阀110可以将射入的光进行调制后射向镜头111，镜头111可以对射入的光进行投射以形成投影画面。
示例地，光阀110可以包括多个反射片，每个反射片可以用于形成投影画面中的一个像素，光阀110可以根据待显示的图像使其中需呈亮态显示的像素对应的反射片将激光反射至镜头111，以实现对光线的调制。镜头111可以包括多个透镜(图中未示出)，对于图10所示的投影设备中各个结构的排布方式，镜头111中的各个透镜可以按照垂直纸面向外的方向依次排布。从光阀110射出的激光可以依次通过镜头111中的多个透镜射至屏幕，以实现镜头111对激光的投射，实现投影画面的显示。
可选地，请继续参考图10，投影设备还可以包括位于匀光部件109与光阀110之间的照明镜组112，经匀光部件109匀化后射出的激光可以通过照明镜组112射向光阀110。该照明镜组112可以包括反射片F、透镜T以及全内反射(total internal reflection prism，TIR)棱镜L。匀光部件109射出的激光可以射向反射片F，反射片F可以将射入的光线反射至凸透镜T，凸透镜T可以将射入的激光会聚至全内反射棱镜L，全内反射棱镜L将射入的激光反射至光阀110。
综上所述，本申请实施例提供的投影设备的投影光源中，合光镜片包括透射区和反射区，荧光轮包括第一区和第二区，激光器发出的激光可以通过合光镜片的透射区射向荧光轮，进而在射向荧光轮的第一区时激发该第一区发出荧光，该荧光在合光镜片上沿目标方向反射。激光在射向荧光轮的第二区时，被该第二区反射回合光镜片，再被合光镜片的反射区沿目标方向反射。如此不设置中继回路系统，仅通过荧光轮反射和合光镜片反射就可实现激光与荧光的合光，该投影光源的体积较小。
另外，荧光轮的第二区上设置有光扩散部，激光在射向荧光轮的第二区时可以经该光 扩散部扩散后再射向合光镜片，扩大了该激光从荧光轮出射时的出光角度范围。由于第一区被激发出的荧光的出光角度范围较大，因此可以保证激光与荧光的出光角度范围相差较小，激光与荧光的混光效果更好，合光光斑的亮度均匀性和颜色均匀性均可改善，采用该混光效果更好的光形成投影画面，该投影画面的显示效果也较好。
以及，可以通过减小透射区的面积，或者仅设置一个透射区，来减少入射至合光镜片的蓝光的光损，满足系统光效的要求。
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“至少一个”指的是一个或多个，术语“多个”指两个或两个以上，除非另有明确的限定。
如在说明书及权利要求当中使用了某些词汇来指称特定组件，本领域技术人员应可理解，制造商可能会用不同名词来称呼同一个组件。本说明书及权利要求并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的准则。如在通篇说明书及权利要求当中所提及的“包含”为一开放式用语，故应解释成“包含但不限定于”。“大致”是指在可接受的误差范围内，本领域技术人员能够在一定误差范围内解决所述技术问题，基本达到所述技术效果。
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 (10)

  1. 一种投影光源，其特征在于，所述投影光源包括：激光器、合光镜片、会聚透镜和荧光轮；所述合光镜片包括多个透射区和多个反射区；所述荧光轮包括第一区和第二区，所述第二区上设置有光扩散部；
    所述激光器用于射出多束激光，所述多束激光分别射向所述多个透射区，所述透射区用于将射入的激光透射向所述会聚透镜；
    所述多束激光中任两束激光在所述会聚透镜上形成的光斑关于所述会聚透镜的光轴均不对称；所述会聚透镜用于将射入的激光会聚向所述荧光轮；
    所述荧光轮被配置为绕转轴旋转，在所述荧光轮的旋转过程中所述荧光轮中的不同区接受会聚后的激光的照射；
    当所述会聚后的激光射向所述第一区时，所述第一区被激发出荧光，以使所述荧光穿过所述会聚透镜射向所述反射区；
    当所述会聚后的激光射向所述第二区时，所述光扩散部对所述会聚后的激光进行扩散，以使扩散后的激光穿过所述会聚透镜射向所述反射区；
    所述反射区用于沿目标方向反射射入的光。
  2. 根据权利要求1所述的投影光源，其特征在于，所述投影光源还包括：位于所述激光器的出光侧的多个分光镜，所述多个分光镜距所述激光器的出光面的距离均不同；
    所述激光器用于向所述多个分光镜发出激光，每个所述分光镜用于接收所述激光器发出的激光中的部分激光，并向所述合光镜片中的一个所述透射区反射所述部分激光，以将所述激光器发出的激光分为射向所述多个透射区的所述多束激光。
  3. 一种投影光源，其特征在于，所述投影光源包括：激光器、合光镜片、会聚透镜和荧光轮；所述合光镜片包括：一个透射区和分别位于所述透射区两侧的两个反射区；所述荧光轮包括第一区和第二区，所述第二区上设置有光扩散部；
    所述激光器用于发出激光，所述激光射向所述透射区，所述透射区用于将射入的激光透射向所述会聚透镜；
    所述会聚透镜用于将射入的激光会聚向所述荧光轮，射向所述会聚透镜的激光经过所述会聚透镜的光轴；
    所述荧光轮被配置为绕转轴旋转，在所述荧光轮的旋转过程中所述荧光轮中的不同区接受会聚后的激光的照射；
    当所述会聚后的激光射向所述第一区时，所述第一区被激发出荧光，以使所述荧光穿过所述会聚透镜射向所述反射区；
    当所述会聚后的激光射向所述第二区时，所述光扩散部对所述会聚后的激光进行扩散，以使扩散后的激光穿过所述会聚透镜射向所述反射区；
    所述反射区用于沿目标方向反射射入的光。
  4. 根据权利要求3所述的投影光源，其特征在于，所述投影光源还包括：位于所述激光器的出光侧的反光镜；
    所述激光器用于向所述反光镜发出激光，所述反光镜用于向所述透射区反射所述激光器发出的激光。
  5. 根据权利要求1至4任一所述的投影光源，其特征在于，所述光扩散部为具有粗糙表面的部件。
  6. 根据权利要求1至4任一所述的投影光源，其特征在于，所述合光镜片中所述透射区的面积小于所述反射区的面积。
  7. 根据权利要求6所述的投影光源，其特征在于，所述合光镜片中每个透射区的面积小于或等于所述每个透射区相邻的所述反射区的面积的1/4。
  8. 根据权利要求6所述的投影光源，其特征在于，所述投影光源还包括缩束部件；所述激光器射出的激光经所述缩束部件缩束后射向所述透射区。
  9. 根据权利要求1至4任一所述的投影光源，其特征在于，所述合光镜片满足以下条件中的至少一种：
    所述合光镜片朝向所述激光器的表面设置有增透膜；
    所述合光镜片朝向所述激光器的表面设置有光扩散结构；
    以及，所述透射区用于透射激光且反射所述荧光。
  10. 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9任一所述的投影光源，以及光阀和镜头；
    所述投影光源用于向所述光阀发出激光，所述光阀用于将射入的激光进行调制后射向所述镜头，所述镜头用于对射入的激光进行投射以形成投影画面。
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