WO2021139501A1 - 光源结构、色轮及投影装置 - Google Patents

光源结构、色轮及投影装置 Download PDF

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Publication number
WO2021139501A1
WO2021139501A1 PCT/CN2020/137104 CN2020137104W WO2021139501A1 WO 2021139501 A1 WO2021139501 A1 WO 2021139501A1 CN 2020137104 W CN2020137104 W CN 2020137104W WO 2021139501 A1 WO2021139501 A1 WO 2021139501A1
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WIPO (PCT)
Prior art keywords
light
area
guide
light source
excitation
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PCT/CN2020/137104
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English (en)
French (fr)
Inventor
郭祖强
杨炳柯
王则钦
李屹
Original Assignee
深圳光峰科技股份有限公司
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Publication of WO2021139501A1 publication Critical patent/WO2021139501A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
    • G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam

Definitions

  • the present invention relates to the field of optical technology, in particular to a light source structure, a color wheel and a projection device.
  • excitation light is mostly used as a laser light source.
  • the excitation light passes through more optical elements, the energy loss is large, and the optical utilization rate is not high.
  • the purpose of the present invention is to provide a light source structure, color wheel and projection device to solve the problem of low optical utilization of excitation light.
  • the embodiments of the present invention achieve the above objectives through the following technical solutions.
  • the present invention provides a light source structure including a laser light source, a color wheel, a first guide assembly and a second guide assembly, and the laser light source is used to emit excitation light.
  • the color wheel includes a concentric inner ring and an outer ring.
  • the inner ring includes a light conversion area.
  • the light conversion area generates laser light under the excitation of the excitation light.
  • the outer ring includes a first guide area and a second guide area.
  • the first guide area and the second guide area Both guide areas are used to guide the excitation light emitted by the laser light source.
  • the first guide component is used to guide the excitation light emitted from the first guide area.
  • the second guiding component is used for guiding the excitation light emitted from the second guiding area to the light conversion area, and is also used for guiding the received laser light emitted from the light conversion area.
  • the central angle corresponding to the second guide area is equal to the central angle corresponding to the light conversion area.
  • the light conversion area includes a first fluorescent area and a second fluorescent area.
  • the first fluorescent area is used to excite the first fluorescence by the excitation light
  • the second fluorescent area is used to excite the second fluorescence by the excitation light.
  • the light source structure further includes a light combining device, and the first fluorescent light, the second fluorescent light and the excitation light emitted from the first guide area are combined by the light combining device and then emitted along the exit light path.
  • the light source structure further includes a first reflector, the first reflector is located between the laser light source and the color wheel, and is used to reflect the excitation light emitted by the laser light source to the color wheel and make the excitation light incident on the color wheel.
  • the incident angle at the outer ring of the wheel is an acute angle.
  • the light source structure further includes a second reflector, the second reflector is inclined at an acute angle with respect to the plane where the color wheel is located, and the second reflector is used to reflect the excitation light incident on the first guide area to the first guide Components.
  • the first guide assembly includes a third reflector, and the third reflector is used to reflect the excitation light emitted from the first guide area.
  • the second reflector and the third reflector are respectively arranged on the opposite side of the color wheel. On both sides, the excitation light incident to the first guide area is guided to the second reflector. The excitation light enters the first guide area after being reflected by the second reflector and exits to the third reflector. The third reflector transfers the excitation light Reflected to the exit light path.
  • the plane where the first guide area is located is inclined to the plane where the second guide area is located, and the first guide area is used to reflect incident excitation light to the first guide component.
  • the second guide assembly includes a fourth reflector and a first dichroic plate, and the excitation light incident on the second guide area and guided by the second guide area is reflected by the fourth reflector to the first
  • the dichroic film, the first dichroic film is used to guide the excitation light from the fourth mirror to the light conversion area, and is used to guide the laser light generated by the excitation of the light conversion area.
  • the light source structure further includes a light combining device and a light homogenizing device.
  • the received laser light emitted from the second guiding component is guided to the homogenizing device by the light combining device, and the excitation light emitted from the first guiding component is combined light The device is guided to the homogenizing device.
  • the light source structure further includes a supplementary light source and a second dichroic plate, the supplementary light source is used to emit supplementary light, and the second dichroic plate is located between the color wheel and the first guide assembly and is used to transfer the first The excitation light emitted by a guide area and the supplementary light emitted by the supplementary light source are guided to the first guide assembly.
  • the present invention also provides a color wheel, including an inner ring and an outer ring arranged concentrically, the outer ring includes a first guide area and a second guide area, the first guide area and the second guide area are respectively used to guide the incident The excitation light to the upper part, and the excitation light is emitted in different directions, the inner ring includes a light conversion area, and the light conversion area is used to generate a laser under the excitation of the excitation light.
  • the plane where the first guide area is located is inclined to the plane where the second guide area is located, and the first guide area is used to reflect the excitation light.
  • the present invention also provides a projection device, which includes the light source structure of the first aspect.
  • the light source structure provided by the present invention guides the excitation light to the first guide assembly and the second guide assembly by arranging the first guide area and the second guide area on the color wheel, and emits the excitation light from the first guide area. After the excitation light is guided by the first guide assembly, there are few optical elements that pass through, which reduces energy loss and improves the optical utilization rate of the light source structure.
  • FIG. 1 is a schematic structural diagram of a light source structure provided by the first embodiment of the present invention.
  • Fig. 2 is a schematic structural diagram of a color wheel provided by an embodiment of the present invention.
  • Fig. 3 is a schematic structural diagram of a light source structure provided by a second embodiment of the present invention.
  • Fig. 4 is a schematic structural diagram of a light source structure provided by a third embodiment of the present invention.
  • Fig. 5 is a schematic structural diagram of a light source structure provided by a fourth embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a color wheel provided by a fourth embodiment of the present invention.
  • Fig. 7 is a cross-sectional view of Fig. 6 along the A-A direction.
  • FIG. 8 is a schematic structural diagram of a light source structure provided by a fifth embodiment of the present invention.
  • Fig. 9 is a schematic structural diagram of a light source structure provided by a sixth embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a projection device provided by a seventh embodiment of the present invention.
  • the present invention provides a light source structure 1, including a laser light source 11, a color wheel 10, a first guide assembly 13, and a second guide assembly 14.
  • the laser light source 11 is used to emit excitation light.
  • the color wheel 10 includes an inner ring 100 and an outer ring 110 that are concentrically arranged.
  • the inner ring 100 includes a light conversion area 101.
  • the light conversion area 101 is used to generate a received laser light under the excitation of the excitation light.
  • the outer ring 110 includes a first guide area 112 and The second guide area 114, the first guide area 112 and the second guide area 114 are respectively used to guide the excitation light incident thereon, and make the excitation light exit in different directions.
  • the first guide assembly 13 is used to guide the excitation light emitted from the first guide area 112.
  • the second guiding component 14 is used for guiding the excitation light emitted from the second guiding area 114 to the light conversion area 101, and is also used for guiding the received laser light emitted from the light conversion area 101.
  • the laser light source 11 may include a laser, and the laser may be a single laser, a laser chip, a laser diode, etc., or other laser emitting devices. It can be understood that the laser light source 11 may also include two, three or more lasers, and multiple lasers may be arranged in an array to increase the light intensity of the laser, and multiple lasers may also be arranged non-uniformly.
  • the laser light source 11 may be a blue light source, and the corresponding excitation light is excitation light. Since the cost of the blue light source is lower, the use of the blue light source can reduce the cost.
  • the excitation light is used as the primary color light and as the excitation light to excite the other two primary colors of red light and green light, which can be mixed into white light and emitted.
  • the laser light source 11 may also be a red light source, a green light source, or a purple light source and other light sources of other colors.
  • the color wheel 10 has a circular ring shape. In other embodiments, the color wheel 10 may also be circular, rectangular, oval, or trapezoidal.
  • the light source structure 1 further includes a color wheel motor 15, and the color wheel 10 is driven by the color wheel motor 15.
  • the color wheel motor 15 drives the color wheel 10 to rotate around the rotation axis of the color wheel motor 15.
  • the rotation of the color wheel 10 can also alternately generate different colors of fluorescence.
  • the light source structure 1 further includes a light combining device 12, and the light combining device 12 is used for combining the received laser light and the excitation light guided and emitted by the first guiding component 13.
  • the light conversion area 101 includes a first fluorescent area 1011 and a second fluorescent area 1013.
  • the first fluorescent area 1011 is used to excite the first fluorescence by the excitation light
  • the second fluorescent area 1013 is used to excite the second fluorescence by the excitation light.
  • the first fluorescent light, the second fluorescent light, and the excitation light emitted from the first guide area 112 are combined by the light combining device 12 and then emitted along the emission light path.
  • the first fluorescent area 1011 is provided with red fluorescent powder.
  • the red fluorescent powder can be sintered with an adhesive to form the first fluorescent area 1011.
  • the red fluorescent powder can also be directly coated on the reflective substrate.
  • the second fluorescent area 1013 is provided with green fluorescent powder.
  • the green fluorescent powder can also be sintered with an adhesive to form the second fluorescent area 1013, or directly coated on the reflective substrate.
  • the second fluorescent light is green light.
  • the first fluorescence may also be green light, and the second fluorescence may also be red light.
  • the area when the light conversion area 101 only includes one area, the area may be provided with yellow phosphor, and the emitted yellow fluorescence is matched with a filter to obtain red fluorescence and green fluorescence.
  • the inner ring 100 further includes an ineffective area 103, and the ineffective area 103 is disposed between the first fluorescent area 1011 and the second fluorescent area 1013.
  • the invalid area 103 is arranged opposite to the first guide area 112, and the central angle corresponding to the invalid area 103 is equal to the central angle corresponding to the first guide area 112.
  • the ineffective area 103 may not be provided with phosphors, it may be transparent glass with a transmission effect, or may be provided with a balancing device, so that the color wheel 10 can maintain a balance during the rotation.
  • the first guide area 112 is a transmission area, and the transmission area can be used to transmit excitation light.
  • the second guide area 114 is a reflection area, and the reflection area can be used to reflect the excitation light to change the propagation direction of the excitation light.
  • the first guide area 112 may also be provided as a through hole.
  • the through hole may be hollowed out in a part of the first guide area 112, or it may be the entire area of the first guide area 112. All are hollow designs.
  • the invalid area 103 provided opposite to the first guide area 112 is also a through hole, so that the color wheel 10 can maintain a balance during the rotation process.
  • the central angle corresponding to the second guiding area 114 is equal to the central angle corresponding to the light conversion area 101, that is, the central angle corresponding to the second guiding area 114 is equal to the central angle corresponding to the first fluorescent area 1011 and the second fluorescent area 1013.
  • the sum of the angles makes the excitation light reflected by the second guide area 114 guided by the second guide assembly 14 to be incident on the first fluorescent area 1011 and the second fluorescent area 1013, but not incident to the ineffective area 103, and is The excitation light transmitted by the first guide area 112 does not enter the first fluorescent area 1011 and the second fluorescent area 1013, so that the excitation light does not affect the colors of the first fluorescent light and the second fluorescent light.
  • the light combining device 12 can be used to combine the excitation light and the received laser light, and the first fluorescence, the second fluorescence, and the excitation light passing through the first guide region 112 are emitted in the same direction after the light combining device 12.
  • the light combining device 12 may be a translucent and yellow dichroic plate, that is, reflecting the red first fluorescence and the green second fluorescence, and transmitting the excitation light. Therefore, the unabsorbed blue excitation light mixed in the first fluorescence and the second fluorescence will be transmitted through the light combining device 12, and will not affect the colors of the red and green primary colors.
  • the light source structure 1 further includes a first reflecting mirror 16 and a first positive lens 17.
  • the first reflecting mirror 16 is located between the laser light source 11 and the color wheel 10, and is used to reflect the excitation light emitted by the laser light source 11 to the color wheel 10, and make the incident angle of the excitation light incident on the outer ring 110 of the color wheel 10 be an acute angle .
  • the first positive lens 17 is located between the laser light source 11 and the first reflecting mirror 16, and is used for condensing the excitation light emitted by the laser light source 11 to the first reflecting mirror 16, that is, the first positive lens 17 can be used for the laser light source 11
  • the emitted excitation light is condensed, and the condensed excitation light is incident on the first reflector 16.
  • the light source structure 1 also includes a second reflector 18 corresponding to the outer ring 110.
  • the second reflector 18 is inclined at an acute angle with respect to the plane where the color wheel 10 is located.
  • the second reflector 18 is used to direct the incident to the first guide
  • the excitation light in the area 112 is reflected to the first guide assembly 13.
  • the second reflector 18 is arranged obliquely with respect to the incident plane of the color wheel 10, so that the excitation light reflected from the reflector 18 and the excitation light reflected from the second guide area 114 can be separated on the path, which is convenient for the second guide area 114.
  • the light path of the excitation light emitted from one guide area 112 is separated from the light path of the excitation light emitted from the second guide area 114, so that different optical devices can be used for guiding along different paths.
  • the optical path of the excitation light emitted from the first guide area 112 and the excitation light emitted from the second guide area 114 are separated, which is beneficial to efficiently use the excitation light as the primary light (that is, the excitation light emitted from the first guide area 112), and avoid The excitation light as the primary color light passes through too many optical devices to cause light loss, that is, the excitation light passes through fewer optical elements, so energy loss is reduced, and the optical utilization rate of the light source structure 1 is improved.
  • the excitation light is reflected by the second guide area 114 and will not be incident on the second mirror 18; when the color wheel 10 is rotated to the second mirror
  • the excitation light is transmitted by the first guide area 112
  • the laser light is incident on the second mirror 18, and is reflected by the second mirror 18 and exits the color wheel 10 again through the first guide area 112 .
  • the excitation light emitted by the laser light source 11 enters the color wheel 10 after passing through the first positive lens 17 and the first reflector 16 in turn.
  • the excitation light passing through the first guide area 112 is reflected by the second reflector 18 again from the first The guide area 112 exits.
  • the light source structure 1 further includes a homogenization device 19, which is adjacent to the light combining device 12, and the received laser light emitted from the second guiding assembly 14 is guided by the light combining device 12 to the homogenizing device 19, from the first guiding assembly 13
  • the emitted excitation light is guided by the light combining device 12 to the light homogenizing device 19.
  • the light homogenizing device 19 may be a square rod.
  • the light homogenization device 19 may also be a diffuser, a single compound eye or a double compound eye, or a compound eye component, etc.
  • the specific structure can be selected according to the actual situation to satisfy the light homogenization effect.
  • the light homogenizing device 19 is adjacent to the light combining device 12. Specifically, the first fluorescent light and the second fluorescent light are reflected by the light combining device 12 to the light homogenizing device 19, and the excitation light passing through the first guide region 112 passes through the light combining device. After 12, it is incident on the homogenizing device 19.
  • the first guide assembly 13 includes a third reflecting mirror 132, and the third reflecting mirror 132 and the second reflecting mirror 18 are respectively arranged on opposite sides of the color wheel 10.
  • the excitation light incident on the first guide area 112 is guided to the second mirror 18, and the excitation light enters the first guide area 112 after being reflected by the second mirror 18 and exits to the third mirror 132, the third mirror 132 It is used to reflect the excitation light emitted from the first guide area 112 and reflect the excitation light to the exit light path.
  • the first guide assembly 13 also includes a first relay lens 134.
  • the first relay lens 134 is located between the third mirror 132 and the light combining device 12.
  • the excitation light passing through the first guide area 112 is reflected by the third reflector and is condensed by the first relay lens 134 to one side of the light combining device 12.
  • the first relay lens 134 can reduce the excitation light during the transmission process. Energy loss. Since the excitation light only passes through the third mirror 132 and the first relay lens 134 after exiting from the first guide area 112, there are fewer optical elements passing through, so the loss of excitation light is less, and the optical utilization rate is higher.
  • the second guide assembly 14 includes a fourth reflecting mirror 141 and a first dichroic plate 143.
  • the excitation light reflected by the second guide region 114 is reflected by the fourth reflecting mirror 141 to the first dichroic plate 143.
  • the first dichroic plate 143 is used to guide the excitation light from the fourth mirror 141 to the light conversion area 101 and to guide the laser light generated by the excitation of the light conversion area 101 to the light combining device 12.
  • the first dichroic film 143 may be a translucent blue dichroic film that reflects the excitation light to the collection lens group 147 and transmits the excited first fluorescence and second fluorescence.
  • the second guide assembly 14 further includes a second positive lens 145, a light homogenizing element 146, and a collection lens group 147.
  • the second positive lens 145 is located between the fourth reflecting mirror 141 and the light homogenizing element 146, and is used to connect the fourth reflecting mirror 141
  • the reflected excitation light is condensed to the homogenizing element 146.
  • the homogenizing element 146 is located between the second positive lens 145 and the first dichroic plate 143, and is used to homogenize the excitation light emitted by the second positive lens 145 and direct the homogenized excitation light to the first two directions ⁇ 143.
  • the collection lens group 147 includes at least two convex lenses. In this embodiment, the collection lens group 147 includes two plano-convex lenses.
  • the collection lens group 147 is located between the first dichroic plate 143 and the color wheel 10, and is used for condensing the excitation light reflected from the first dichroic plate 143 to the first fluorescent area 1011 or the second fluorescent area of the inner ring 100 1013, also used for converging the first fluorescence excited by the first fluorescent region 1011 and the second fluorescence excited by the second fluorescent region 1013 to the first dichroic plate 143.
  • the collection lens group 147 can make the excitation light incident on the first fluorescent region 1011 and the second fluorescent region 1013 more concentrated, so as to improve the efficiency of exciting the first fluorescent light and the second fluorescent light.
  • the excitation light reflected by the second guide area 114 is directed by the fourth reflector 141, the second positive lens 145, the homogenizing element 146, the first dichroic plate 143 and the collecting lens group 147 in turn, and then enters the first fluorescent light.
  • the second guide assembly 14 further includes a second relay lens 149, the second relay lens 149 is located between the first dichroic plate 143 and the light combining device 12, the first fluorescent light and the second fluorescent light are separated
  • the two relay lenses 149 converge to the other side of the light combining device 12, and the second relay lens 149 can reduce the energy loss of the first fluorescent light and the second fluorescent light during the transmission process.
  • the excited first fluorescence and second fluorescence are directed to the homogenization device 19 by the collection lens group 147, the transmission of the first dichroic plate 143, the second relay lens 149 and the light combining device 12 in sequence.
  • the excitation light incident on the first guide area 112 passes through the first guide area 112 and then enters the second reflector 18, and is reflected by the second reflector 18 and then enters the first guide area 112 again.
  • the first guide area 112 After passing through the first guide area 112, it is incident on the third mirror 132, and after being reflected by the third mirror 132, it is incident on the light combining device 12 after being condensed by the first relay lens 134, and then passes through the light combining device 12 and finally incident on Homogenizing device 19.
  • the excitation light incident on the second guide area 114 is reflected by the second guide area 114 and then sequentially reflected by the fourth mirror 141, the second positive lens 145 and the light homogenizing element 146, and the first dichroic plate 143 is reflected and collected.
  • the convergent lens group 147 is incident on the first fluorescent area 1011 and the second fluorescent area 1013, and the first fluorescent area and the second fluorescent light are excited in the first fluorescent area 1011 and the second fluorescent area 1013, respectively.
  • the fluorescent light is converged by the collection lens group 147, transmitted by the first dichroic plate 143, converged by the second relay lens 149, and reflected by the light combining device 12, and finally enters the homogenizing device 19.
  • the light path of the excitation light used as illuminating light is shorter than the light path of the excitation light used to generate fluorescence, and there are fewer components passing through, which reduces the energy of the excitation light used for illumination. Loss, the optical utilization rate of the light source structure 1 is improved.
  • the light source structure 1 provided by the present invention uses the first guide area 112 and the second guide area 114 provided on the color wheel 10 to separate the excitation light used for illumination and the excitation light used for excitation to generate fluorescence.
  • the excitation light used for illumination does not follow the light path that generates fluorescence, and the light path is shorter, on the other hand, the excitation light used for illumination passes through the first guide area 112 after exiting. There are few optical elements, which reduces the energy loss of the excitation light used for illumination, and improves the optical utilization of the light source structure 1.
  • the difference from the first embodiment is that the light combining device 22 of the light source structure 2 provided in this embodiment can be a yellow-transmitting and blue-transmitting dichroic plate, and the first fluorescence and the second fluorescence can be It passes through the light combining device 22 and is incident on the light homogenizing device 29, where the light homogenizing device 29 can be a compound eye, a diffuser or other light homogenizing device.
  • the excitation light passing through the first guide area 112 is reflected by the light combining device 22 to the homogenizing light. ⁇ 29. That is, the red first fluorescence and the green second fluorescence are transmitted, and the excitation light is reflected.
  • the unabsorbed excitation light mixed in the first fluorescent light and the second fluorescent light will also be transmitted through the light combining device 22 and will not enter the light homogenizing device 29.
  • the light combining device 22 is a yellow-transmitting and blue-transmitting dichroic plate
  • the first fluorescent light and the second fluorescent light can pass through the light combining device 22 and enter the light homogenizing device 29, shortening the first fluorescent and second fluorescent light.
  • the light source structure 3 provided in this embodiment further includes a supplementary light source 33, a speckle reduction device 34, a second dichroic plate 35, and a third relay lens 36 .
  • the supplementary light source 33 is adjacent to the laser light source 11 and is used to emit supplementary light, thereby improving the brightness of the light source structure 3 and the purity of the primary colors, and expanding the color gamut space of the emitted light.
  • the supplementary light source 33 may also be a laser or a laser chip or the like.
  • the third relay lens 36 is located between the color wheel 10 and the second dichroic film 35, and is used for condensing the excitation light from the second reflecting mirror 38 and emitting it to the second dichroic film 35.
  • the third relay lens 36 can reduce the energy loss of the excitation light emitted from the first guide area 112 to maintain the intensity of the excitation light.
  • the second dichroic plate 35 is located between the color wheel 10 and the first guide assembly 37, and is used to guide the excitation light emitted from the first guide area 112 and the supplementary light emitted by the supplementary light source 33 to the first guide assembly 37.
  • the second dichroic plate 35 is located between the third relay lens 36 and the speckle reduction device 34, and is used to allow the excitation light emitted by the third relay lens 36 to pass through and be incident to the speckle reduction device 34.
  • the speckle eliminating device 34 is located between the second dichroic plate 35 and the third mirror 332, and the excitation light and supplementary light passing through the speckle eliminating device 34 are directed to the homogenizing device 39 by the third reflecting mirror 332. Wherein, by providing the speckle elimination device 34, the excitation light and the supplementary light can be scattered and diffused, thereby eliminating the coherence of the laser light.
  • the supplementary light source 33 is a red light source or a green light source, and emits red supplementary light or green supplementary light.
  • the supplementary light source 33 is not limited to a red light source or a green light source, and may also be a red and green light source, that is, emitting a red laser and a green laser, or a purple light source.
  • the color of the supplementary light emitted by the supplementary light source 33 can be set according to different requirements for the received laser light. For example, when a certain color of the received laser light is insufficient, the supplementary light is the light of that color.
  • the mixed light is directed to the homogenizing device 39 by the speckle reducing device 34, the third mirror 332, and the first relay lens 334 in sequence. That is, the supplementary light is first combined with the excitation light and then passes through the speckle reducing device 34 together, and then enters the third mirror 332.
  • the supplementary light since supplementary light is added on the basis of excitation light for illumination, the supplementary light can expand the color gamut and brightness of fluorescence, thereby increasing the brightness of the light source structure 3, the purity of the primary colors, and expanding the emission.
  • the gamut space of light since supplementary light is added on the basis of excitation light for illumination, the supplementary light can expand the color gamut and brightness of fluorescence, thereby increasing the brightness of the light source structure 3, the purity of the primary colors, and expanding the emission.
  • the gamut space of light since supplementary light is added on the basis of excitation light for illumination, the supplementary light can expand the color gamut and brightness of fluorescence, thereby increasing the brightness of the light source structure 3, the purity of the primary colors, and expanding the emission.
  • the difference from the third embodiment is that the light source structure 4 provided by this embodiment has a plane where the first guide area 412 is located and is arranged obliquely with respect to the plane where the second guide area 414 is located.
  • the area 412 is used to reflect the incident excitation light to the first guide assembly 43.
  • the second reflecting mirror 48 is disposed in the first guide area 412.
  • the first guide area 412 can be chamfered.
  • the angle of the chamfer can be designed according to the actual light path and the size of the space.
  • the second reflector 48 can be a reflective surface, or it can be formed on the first guide area 412 by coating.
  • the first guide area 412 of the color wheel is arranged as an inclined surface, so that the excitation light is directly reflected and emitted on the inclined surface, eliminating the need for a reflector on the back of the color wheel, and at the same time avoiding the excitation light transmitting through the color wheel The light loss caused by the time.
  • the difference from the first embodiment is that the second reflector 58 and the second dichroic plate 55 of the light source structure 5 provided in this embodiment are located on opposite sides of the color wheel 10, and the second The reflecting mirror 58 is opposite to the outer ring 110.
  • the excitation light incident on the first guide area 112 is guided to the second reflecting mirror 58, and after being reflected by the second reflecting mirror 58, it passes through the first guide area 112 and is incident on the second reflecting mirror.
  • the dichroic film 55 is directed to the light combining device 52 by the second dichroic film 55.
  • the second dichroic plate 55 corresponds to the light combining device 52, and is used to guide the excitation light emitted from the first guide area 112 to the light combining device 52 through the first guiding component 51.
  • the second dichroic plate 55 is located at Between the speckle eliminating device 54 and the light homogenizing device 59, the supplementary light emitted from the speckle eliminating device passes through and is used to reflect the excitation light from the second mirror 58 to the light combining device 52.
  • the speckle reducing device 54 is located between the supplementary light source 53 and the second dichroic film 55, and is used to eliminate the speckle of the supplementary light and emit it to the second dichroic film 55.
  • the supplementary light passes through the speckle reducing device 54 first, and then is guided to the light combining device 52 by the second dichroic plate 55.
  • supplementary light is added, so that at a higher excitation light power density level, supplementary light can be used as a supplement to adjust the color of the mixed primary color light to a better level to achieve higher brightness and Wider color gamut.
  • the difference from the first embodiment is that the first guide area 112 of the light source structure 6 provided in this embodiment is a reflective area, and the second guide area 114 is a transmissive area.
  • the second reflector 68 and the color wheel motor 15 are located on the same side of the color wheel 10, and the first dichroic plate 643 is a blue-transparent-yellow dichroic plate, that is, the excitation light emitted by the laser light source 61 passes through the first guide area After the reflection of 112 is guided by the first guide assembly 63 to the light combining device 62; the excitation light emitted by the laser light source 61 passes through the second guide area 114 and then is sequentially reflected by the second reflector 68, guided by the second guide assembly 14.
  • the reversed color of the first dichroic plate 643 enters the light conversion area 101, and the received laser light generated by the light conversion area 101 passes through the first dichroic plate 643 and then enters the light combining device 62.
  • the excitation light passes through fewer elements, which can also reduce energy loss and improve the optical utilization rate of the light source structure 6.
  • the first guide region 112 is a reflective region
  • the second guide region 114 is a transmissive region. Since the area of the first guide region 112 is smaller than the area of the second guide region 114, it is used as the excitation light for exciting the fluorescent light. The amount of light is greater than the amount of excitation light used for illumination, and the light path of the excitation light used for excitation to generate fluorescence is longer, so the more energy is lost. Increasing the amount of excitation light used for excitation to generate fluorescence can affect the fluorescence energy To compensate for the loss.
  • the present invention also provides a projection device 100.
  • the projection device 100 includes a light source structure 1.
  • the projection device 100 further includes an optical engine 8 and a lens 9.
  • the light emitted by the light source structure 1 passes through the optical engine. 8 is transmitted through the lens 9 after imaging.

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Abstract

一种光源结构（1），包括激光光源（11）、色轮（10）、第一引导组件（13）和第二引导组件（14），激光光源（11）用于发射激发光。色轮（10）包括同心设置的内圈（100）和外圈（110），内圈（100）包括光转换区（101），光转换区（101）在激发光的激发下产生受激光，外圈（110）包括第一引导区（112）和第二引导区（114），第一引导区（112）和第二引导区（114）均用于引导激光光源（11）发射的激发光。第一引导组件（13）用于引导自第一引导区（112）出射的激发光沿出射光路出射。第二引导组件（14）用于将自第二引导区（114）出射的激发光引导至光转换区（101），还用于将从光转换区（101）出射的受激光引导至出射光路。所提供的光源结构（1）的激发光经过的光学元件少，减少了能量损失，提高了光源结构（1）的光学利用率。还提供一种色轮（10）和一种投影装置。

Description

光源结构、色轮及投影装置 技术领域
本发明涉及光学技术领域，具体而言，涉及一种光源结构、色轮及投影装置。
背景技术
近年来，随着市场的飞速发展和元器件工艺的进步，激光投影光机的设计也在不断进化升级。激发光相对红、绿激光的成本更低，因此现有的激光荧光光源中，多利用激发光作为激光光源。然而，现有的激光光源的光路中，激发光经过的光学元件较多，能量损失较大，光学利用率不高。
发明内容
本发明的目的在于提供一种光源结构、色轮及投影装置，以解决激发光的光学利用率不高的问题。本发明实施例通过以下技术方案来实现上述目的。
第一方面，本发明提供一种光源结构，包括激光光源、色轮、第一引导组件和第二引导组件，激光光源用于发射激发光。色轮包括同心的内圈和外圈，内圈包括光转换区，光转换区在激发光的激发下产生受激光，外圈包括第一引导区和第二引导区，第一引导区和第二引导区均用于引导激光光源发射的激发光。第一引导组件用于引导自第一引导区出射的激发光。第二引导组件用于将自第二引导区出射的激发光引导至光转换区，还用于引导从光转换区出射的受激光。
在一种实施方式中，第二引导区对应的圆心角等于光转换区对应的圆心角。
在一种实施方式中，光转换区包括第一荧光区和第二荧光区，第一荧光区用 于被激发光激发出第一荧光，第二荧光区用于被激发光激发出第二荧光，光源结构还包括合光装置，第一荧光、第二荧光和自第一引导区出射的激发光经合光装置的合光后沿出射光路出射。
在一种实施方式中，光源结构还包括第一反射镜，第一反射镜位于激光光源和色轮之间，用于将激光光源出射的激发光反射至色轮，并使激发光入射至色轮外圈时的入射角为锐角。
在一种实施方式中，光源结构还包括第二反射镜，第二反射镜相对色轮所在平面呈锐角倾斜，第二反射镜用于将入射至第一引导区的激发光反射至第一引导组件。
在一种实施方式中，第一引导组件包括第三反射镜，第三反射镜用于反射自第一引导区出射的激发光，第二反射镜和第三反射镜分别设置在色轮的相对两侧，入射至第一引导区的激发光被引导至第二反射镜，激发光经过第二反射镜的反射后进入第一引导区并出射至第三反射镜，第三反射镜将激发光反射至出射光路。
在一种实施方式中，第一引导区所在平面相对第二引导区所在平面倾斜设置，第一引导区用于将入射的激发光反射至第一引导组件。
在一种实施方式中，第二引导组件包括第四反射镜和第一二向色片，入射至第二引导区并被第二引导区引导出射的激发光被第四反射镜反射至第一二向色片，第一二向色片用于将来自第四反射镜的激发光引导至光转换区，并用于引导光转换区激发产生的受激光。
在一种实施方式中，光源结构还包括合光装置和匀光装置，自第二引导组件出射的受激光被合光装置引导至匀光装置，自第一引导组件出射的激发光被合光装置引导至匀光装置。
在一种实施方式中，光源结构还包括补充光源和第二二向色片，补充光源用于发射补充光，第二二向色片位于色轮和第一引导组件之间，用于将第一引导区出射的激发光以及补充光源发射的补充光引导至第一引导组件。
第二方面，本发明还提供一种色轮，包括同心设置的内圈和外圈，外圈包括第一引导区和第二引导区，第一引导区和第二引导区分别用于引导入射至其上的激发光，且使激发光沿不同的方向出射，内圈包括光转换区，光转换区用于在激发光的激发下产生受激光。
在一种实施方式中，第一引导区所在平面相对第二引导区所在平面倾斜设置，第一引导区用于反射激发光。
第三方面，本发明还提供一种投影装置，投影装置包括第一方面的光源结构。
相较于现有技术，本发明提供的光源结构通过在色轮上设置第一引导区和第二引导区分别将激发光引导到第一引导组件和第二引导组件，从第一引导区出射的激发光经第一引导组件引导后经过的光学元件少，减少了能量损失，提高了光源结构的光学利用率。
本发明的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
为了更清楚地说明本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发明的一些实施例，对于本领域技术人员来讲，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是本发明第一实施例提供的一种光源结构的结构示意图。
图2是本发明实施例提供的色轮的结构示意图。
图3是本发明第二实施例提供的光源结构的结构示意图。
图4是本发明第三实施例提供的光源结构的结构示意图。
图5是本发明第四实施例提供的光源结构的结构示意图。
图6是本发明第四实施例提供的色轮的结构示意图。
图7是图6沿A-A方向的剖面图。
图8是本发明第五实施例提供的光源结构的结构示意图。
图9是本发明第六实施例提供的光源结构的结构示意图。
图10是本发明第七实施例提供的投影装置的结构示意图。
具体实施方式
为了便于理解本实施例，下面将参照相关附图对本实施例进行更全面的描述。附图中给出了本发明的较佳实施方式。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本发明的公开内容理解的更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本实施例中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本发明。
第一实施例
请参阅图1和图2，本发明提供一种光源结构1，包括激光光源11、色轮10、 第一引导组件13和第二引导组件14，激光光源11用于发射激发光。色轮10包括同心设置的内圈100和外圈110，内圈100包括光转换区101，光转换区101用于在激发光的激发下产生受激光，外圈110包括第一引导区112和第二引导区114，第一引导区112和第二引导区114分别用于引导入射至其上的激发光，且使激发光沿不同的方向出射。第一引导组件13用于引导自第一引导区112出射的激发光。第二引导组件14用于将自第二引导区114出射的激发光引导至光转换区101，还用于引导从光转换区101出射的受激光。
具体地，激光光源11可以包括激光器，激光器可以是单个的激光器、激光芯片或者激光二极管等，或者其他激光发射装置。可以理解，激光光源11也可以包括两个、三个或者多个激光器，多个激光器可以阵列设置，以增加激光的光强，多个激光器还可以非均匀设置。
在本实施例中，激光光源11可以为蓝光光源，则相应的激发光为激发光。由于蓝光光源的成本较低，因此使用蓝光光源可以降低成本。激发光作为基色光，又作为激发光，激发出红光和绿光其它两种基色光，从而可以混成白光并出射。
在其他实施方式中，激光光源11还可以为红光光源、绿光光源或者紫光光源等其他颜色的光源。
本实施例中，色轮10为圆环形。在其他实施方式中，色轮10还可以为圆形、矩形、椭圆形或者梯形的一种。
光源结构1还包括色轮马达15，色轮10由色轮马达15驱动。色轮马达15驱动色轮10绕色轮马达15的转轴进行转动，一方面避免了激光长时间作用于色轮10的同一位置而导致局部温度过高，从而降低色轮10的使用寿命。另一方面，色轮10的转动还可以交替产生不同颜色的荧光。
光源结构1还包括合光装置12，合光装置12用于对受激光和由第一引导组件13引导出射的激发光进行合光。
光转换区101包括第一荧光区1011和第二荧光区1013，第一荧光区1011用于被激发光激发出第一荧光，第二荧光区1013用于被激发光激发出第二荧光，第一荧光、第二荧光和自第一引导区112出射的激发光经合光装置12的合光后沿出射光路出射。
在本实施例中，第一荧光区1011设置红色荧光粉，红色荧光粉可以与粘接剂烧结形成在第一荧光区1011，红色荧光粉也可以直接涂覆在反射衬底上，第一荧光为红光。第二荧光区1013设置绿色荧光粉，绿色荧光粉也可以与粘接剂烧结形成在第二荧光区1013，或者直接涂覆在反射衬底上，第二荧光为绿光。
在其他实施方式中，第一荧光也可以是绿光，第二荧光也可以是红光。
在其他实施方式中，当光转换区101仅包括一个区域时，该区域可以设置黄色荧光粉，出射的黄色荧光再配合滤光片以得到红色荧光和绿色荧光。
在本实施例中，内圈100还包括无效区103，无效区103设置在第一荧光区1011和第二荧光区1013之间。无效区103与第一引导区112相对设置，无效区103对应的圆心角等于第一引导区112对应的圆心角。无效区103可以不设置荧光粉，其可以是具有透射作用的透明玻璃，也可以设置有平衡装置，以使色轮10在转动过程中可以保持平衡。
在本实施例中，第一引导区112为透射区，透射区可以用于激发光的透过。第二引导区114为反射区，反射区可以用于反射激发光，以改变激发光的传播方向。
在一种实施方式中，第一引导区112还可以设置为通孔，所说的通孔，可以 是在第一引导区112的部分区域设置镂空，也可以是第一引导区112的整个区域都为镂空设计。相应地，与第一引导区112相对设置的无效区103也为通孔，满足色轮10在转动过程中可以保持平衡即可。
在本实施例中，第二引导区114对应的圆心角等于光转换区101对应的圆心角，即第二引导区114对应的圆心角等于第一荧光区1011和第二荧光区1013对应的圆心角之和，使得被第二引导区114反射的激发光经过第二引导组件14的引导，正好入射到第一荧光区1011和第二荧光区1013，而不会入射至无效区103，并且被第一引导区112透射的激发光不会进入到第一荧光区1011和第二荧光区1013，从而激发光不会影响第一荧光和第二荧光的颜色。
合光装置12可以用于对激发光和受激光进行合光，第一荧光、第二荧光和穿过第一引导区112的激发光经合光装置12后沿同一方向出射。在本实施例中，合光装置12可以是透蓝反黄的二向色片，也就是对红色的第一荧光和绿色的第二荧光进行反射，对激发光进行透射。因此，混在第一荧光和第二荧光中未被吸收的蓝激发光会在合光装置12处透射，也就不会影响红、绿基色光的颜色。
光源结构1还包括第一反射镜16和第一正透镜17。第一反射镜16位于激光光源11和色轮10之间，用于将激光光源11出射的激发光反射至色轮10，并使激发光入射至色轮10外圈110时的入射角为锐角。第一正透镜17位于激光光源11和第一反射镜16之间，用于将激光光源11出射的激发光会聚至第一反射镜16，也就是第一正透镜17可以用于对激光光源11发出的激发光进行会聚，并将会聚后的激发光入射至第一反射镜16。
光源结构1还包括第二反射镜18，第二反射镜18与外圈110对应，第二反射镜18相对色轮10所在平面呈锐角倾斜，第二反射镜18用于将入射至第一引 导区112的激发光反射至第一引导组件13。第二反射镜18相对于色轮10的入射平面倾斜设置，可以使从反射镜18反射出射的激发光与从第二引导区114反射出射的激发光在路径上分离开，方便于将从第一引导区112出射的激发光与从第二引导区114出射的激发光的光路分离，从而可以沿不同的路径采用不同的光学器件进行引导。从第一引导区112出射的激发光与从第二引导区114出射的激发光的光路分离，有利于高效利用作为基色光的激发光(即从第一引导区112出射的激发光)，避免作为基色光的激发光通过过多的光学器件产生光损失，也就是，激发光经过的光学元件少，因此减少了能量损失，提高了光源结构1的光学利用率。当色轮10转至第二反射镜18与第二引导区114对应时，激发光被第二引导区114反射，不会入射至第二反射镜18；当色轮10转至第二反射镜18与第一引导区112对应时，激发光被第一引导区112透射，激光入射至第二反射镜18，并且经第二反射镜18的反射再次经第一引导区112从色轮10出射。激光光源11发射的激发光依次经第一正透镜17和第一反射镜16后入射至色轮10，穿过第一引导区112的激发光经第二反射镜18的反射后再次从第一引导区112出射。
光源结构1还包括匀光装置19，匀光装置19与合光装置12相邻，自第二引导组件14出射的受激光被合光装置12引导至匀光装置19，自第一引导组件13出射的激发光被合光装置12引导至匀光装置19。在本实施例中，匀光装置19可以为方棒。在其他实施方式中，匀光装置19还可以是散射片、单复眼或者双复眼或者是复眼组件等，具体结构可以根据实际情况选定，满足匀光作用即可。匀光装置19与合光装置12相邻，具体地，第一荧光和第二荧光经合光装置12的反射至匀光装置19，穿过第一引导区112的激发光穿过合光装置12后入射至匀光装置19。
第一引导组件13包括第三反射镜132，第三反射镜132和第二反射镜18分别设置在色轮10的相对两侧。入射至第一引导区112的激发光被引导至第二反射镜18，激发光经过第二反射镜18的反射后进入第一引导区112并出射至第三反射镜132，第三反射镜132用于反射自第一引导区112出射的激发光，并将激发光反射至出射光路。
第一引导组件13还包括第一中继透镜134。第一中继透镜134位于第三反射镜132和合光装置12之间。穿过第一引导区112的激发光经过第三反射件的反射后被第一中继透镜134会聚至合光装置12的一侧，第一中继透镜134可以减少激发光在传输过程中的能量损失。由于激发光从第一引导区112出射后只经过了第三反射镜132和第一中继透镜134，经过的光学元件较少，因此激发光的损失更少，光学利用率更高。
第二引导组件14包括第四反射镜141和第一二向色片143。被第二引导区114反射的激发光被第四反射镜141反射至第一二向色片143。第一二向色片143用于将来自第四反射镜141的激发光引导至光转换区101，并用于将光转换区101激发产生的受激光引导至合光装置12。在本实施例中，第一二向色片143可以为透黄反蓝二向色片，将激发光反射至收集透镜组147，并且透射激发出的第一荧光和第二荧光。
第二引导组件14还包括第二正透镜145、匀光元件146和收集透镜组147，第二正透镜145位于第四反射镜141和匀光元件146之间，并用于将第四反射镜141反射的激发光会聚至匀光元件146。匀光元件146位于第二正透镜145和第一二向色片143之间，并用于对第二正透镜145出射的激发光进行匀光并将匀光后的激发光指引至第一二向色片143。收集透镜组147至少包括两个凸透镜。在 本实施例中，收集透镜组147包括两个平凸透镜。在其他实施方式中，还可以是凹凸透镜或者双凸透镜，满足会聚作用即可。收集透镜组147位于第一二向色片143和色轮10之间，用于将自第一二向色片143反射的激发光会聚至内圈100的第一荧光区1011或第二荧光区1013，还用于使第一荧光区1011激发的第一荧光和第二荧光区1013激发的第二荧光会聚至第一二向色片143。收集透镜组147可以使入射至第一荧光区1011和第二荧光区1013的激发光更加集中，以提高激发出第一荧光和第二荧光的效率。被第二引导区114反射的激发光依次经第四反射镜141、第二正透镜145、匀光元件146、第一二向色片143和收集透镜组147的指引后，入射至第一荧光区1011和第二荧光区1013。
在本实施例中，第二引导组件14还包括第二中继透镜149，第二中继透镜149位于第一二向色片143和合光装置12之间，第一荧光和第二荧光被第二中继透镜149会聚至合光装置12的另一侧，第二中继透镜149可以减少第一荧光和第二荧光在传输过程中的能量损失。激发出的第一荧光和第二荧光依次被收集透镜组147、第一二向色片143的透射、第二中继透镜149和合光装置12指引至匀光装置19。
在本实施例中，入射至第一引导区112的激发光透过第一引导区112后入射至第二反射镜18，经过第二反射镜18的反射后再次入射至第一引导区112，透射第一引导区112后入射至第三反射镜132，在第三反射镜132反射后经过第一中继透镜134的会聚后入射至合光装置12，然后通过合光装置12并最终入射至匀光装置19。
入射至第二引导区114的激发光被第二引导区114反射后依次经第四反射镜141的反射、第二正透镜145和匀光元件146、第一二向色片143的反射以及收 集透镜组147的会聚后入射至第一荧光区1011和第二荧光区1013，并在第一荧光区1011和第二荧光区1013分别激发出第一荧光和第二荧光，第一荧光和第二荧光依次经收集透镜组147的会聚、第一二向色片143的透射、第二中继透镜149的会聚和合光装置12的反射后最终入射至匀光装置19。也就是说，做为照明光的激发光的光路径相对于做为激发产生荧光的激发光的光路径更短，且经过的元器件也更少，减少了做为照明用的激发光的能量损失，提高了光源结构1的光学利用率。
综上，本发明提供的光源结构1通过在色轮10上设置的第一引导区112和第二引导区114，使做为照明用的激发光和做为激发产生荧光的激发光分为不同的光路径出射，一方面由于做为照明用的激发光不沿产生荧光的光路径走，且光路径更短，另一方面做为照明用的激发光从第一引导区112出射后经过的光学元件少，减少了做为照明用的激发光的能量损失，提高了光源结构1的光学利用率。
第二实施例
请参阅图2和图3，与第一实施例不同的是，本实施例提供的光源结构2的合光装置22可以是透黄反蓝的二向色片，第一荧光和第二荧光可以穿过合光装置22入射至匀光装置29，其中，匀光装置29可以是复眼、散射片或其它匀光装置，穿过第一引导区112的激发光被合光装置22反射至匀光装置29。也就是对红色的第一荧光和绿色的第二荧光进行透射，对激发光进行反射。混在第一荧光和第二荧光中未被吸收的激发光也会在合光装置22处透射，不会进入匀光装置29。
该实施例中，由于合光装置22是透黄反蓝的二向色片，第一荧光和第二荧光可以穿过合光装置22入射至匀光装置29，缩短了第一荧光和第二荧光在竖直 方向上的传输距离，从而减少了光源结构2的体积。
第三实施例
请参阅图2和图4，与第一实施例不同的是，本实施例提供的光源结构3还包括补充光源33、消散斑装置34、第二二向色片35和第三中继透镜36。其中，补充光源33与激光光源11相邻，并用于发射补充光，进而提高光源结构3的出光亮度、基色纯度，并扩展出射光线的色域空间。补充光源33也可以是激光器或者激光芯片等。第三中继透镜36位于色轮10和第二二向色片35之间，用于将来自第二反射镜38的激发光会聚并出射至第二二向色片35。第三中继透镜36可以减少第一引导区112出射的激发光的能量损失，以保持激发光的光强。第二二向色片35位于色轮10和第一引导组件37之间，用于将第一引导区112出射的激发光以及补充光源33发射的补充光引导至第一引导组件37。具体地，第二二向色片35位于第三中继透镜36和消散斑装置34之间，用于使第三中继透镜36出射的激发光穿过并入射至消散斑装置34，还用于将补充光源33发射的补充光反射至消散斑装置34。消散斑装置34位于第二二向色片35和第三反射镜332之间，经过消散斑装置34的激发光和补充光被第三反射镜332指引至匀光装置39。其中通过设置消散斑装置34，可以对激发光和补充光进行散射、扩散，从而消除激光的相干性。
在本实施方式中，补充光源33为红光源或者绿光源，发出红光补充光或者绿光补充光。在其他实施方式中，补充光源33不限于红光源或者绿光源，还可以是红绿光光源，即发出红激光和绿激光，或者紫光光源等。补充光源33发出的补充光的颜色可以根据对受激光的不同要求进行设置，如当受激光中某种颜色的光不足时，则该补充光即为该种颜色的光。在本实施方式中，混合光依次被消 散斑装置34、第三反射镜332和第一中继透镜334指引至匀光装置39。也就是补充光先与激发光合光后再一起经过消散斑装置34，再入射至第三反射镜332。
该实施例中，由于在做为照明用的激发光的基础上增加了补充光，该补充光可以扩大荧光的色域范围和亮度，进而提高光源结构3的出光亮度、基色纯度，并扩展出射光线的色域空间。
第三实施例
请参阅图5、图6和图7,与第三实施例不同的是，本实施例提供的光源结构4的第一引导区412所在平面相对第二引导区414所在平面倾斜设置，第一引导区412用于将入射的激发光反射至第一引导组件43。第二反射镜48设置于第一引导区412。具体地，可以对第一引导区412开设倒角，其中倒角的角度可以根据实际的光路以及空间大小进行设计，第二反射镜48可以是一个反射面，也可以通过镀膜等方式形成于第一引导区412倒角所形成的斜面上。可以理解，对第一引导区412进行倒角后，可以同时增加第一引导区412的重量，以使色轮40在转动过程中保持平衡。
该实施例中，将色轮的第一引导区412设置成斜面，使激发光在该斜面上直接反射出射，省去了在色轮的背面设置反射镜，同时也可以避免激发光透射色轮时产生的光损失。
第五实施例
请参阅图2和图8，与第一实施例不同的是，本实施例提供的光源结构5的第二反射镜58和第二二向色片55位于色轮10的相对两侧，第二反射镜58与外圈110相对，入射至第一引导区112的激发光被引导至第二反射镜58，经过第二反射镜58的反射后，再经过第一引导区112并入射至第二二向色片55，并被第 二二向色片55指引至合光装置52。第二二向色片55与合光装置52对应，并用于将第一引导区112出射的激发光经第一引导组件51引导至合光装置52，具体地，第二二向色片55位于消散斑装置54和匀光装置59之间，用于消散斑出射的补充光的穿过，并用于将来自第二反射镜58的激发光反射至合光装置52。消散斑装置54位于补充光源53和第二二向色片55之间，用于将补充光进行消散斑并出射至第二二向色片55。补充光先经过消散斑装置54，然后被第二二向色片55引导至合光装置52。
该实施例中，增加补充光，这样在较高的激发光功率密度的水平下，补充光可作为补充将混合成的基色光颜色调整到一个较好的水平，实现光机的更高亮度和更宽色域。
第六实施例
请参阅图2和图9，与第一实施例不同的是，本实施例提供的光源结构6的第一引导区112为反射区，第二引导区114为透射区。第二反射镜68与色轮马达15位于色轮10的同侧，且第一二向色片643为反蓝透黄二向色片，也就是激光光源61出射的激发光经第一引导区112的反射后经第一引导组件63引导至合光装置62；激光光源61出射的激发光透过第二引导区114后依次经第二反射镜68的反射、第二引导组件14的引导、第一二向色片643的反色后入射至光转换区101，光转换区101产生的受激光透过第一二向色片643后入射至合光装置62。本实施例中的激发光经过的元件也较少，也可以减少能量损失，提高光源结构6的光学利用率。
该实施例中，第一引导区112为反射区，第二引导区114为透射区，由于第一引导区112的面积小于第二引导区114的面积，因此做为激发产生荧光的激发 光的光量大于做为照明用的激发光的光量，且做为激发产生荧光的激发光的光路更长，因此损耗的能量也就越多，增加做为激发产生荧光的激发光的光量可以对荧光能量的损耗进行补偿。
第七实施例
请参阅图10，本发明还提供一种投影装置100，投影装置100包括光源结构1，在本实施例中，投影装置100还包括光学引擎8和镜头9，光源结构1出射的光线经光学引擎8成像后经镜头9透射。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (13)

  1. 一种光源结构，其特征在于，包括：
    激光光源，用于发射激发光；
    色轮，包括同心设置的内圈和外圈，所述内圈包括光转换区，所述光转换区在所述激发光的激发下产生受激光，所述外圈包括第一引导区和第二引导区，所述第一引导区和所述第二引导区均用于引导所述激光光源发射的激发光；
    第一引导组件，用于引导自所述第一引导区出射的激发光沿出射光路出射；以及
    第二引导组件，用于将自所述第二引导区出射的激发光引导至所述光转换区，还用于将从所述光转换区出射的受激光引导至所述出射光路。
  2. 根据权利要求1所述的光源结构，其特征在于，所述第二引导区对应的圆心角等于所述光转换区对应的圆心角。
  3. 根据权利要求1所述的光源结构，其特征在于，所述光转换区包括第一荧光区和第二荧光区，所述第一荧光区在所述激发光的激发下产生第一荧光，所述第二荧光区在所述激发光的激发下产生第二荧光，所述光源结构还包括合光装置，所述第一荧光、所述第二荧光和自所述第一引导区出射的激发光经所述合光装置的合光后沿所述出射光路出射。
  4. 根据权利要求1所述的光源结构，其特征在于，所述光源结构还包括第一反射镜，所述第一反射镜位于所述激光光源和所述色轮之间，用于将所述激光光源出射的激发光反射至所述色轮，并使所述激发光入射至所述色轮外圈时的入射 角为锐角。
  5. 根据权利要求1所述的光源结构，其特征在于，所述光源结构还包括第二反射镜，所述第二反射镜相对所述色轮所在平面呈锐角倾斜，所述第二反射镜用于将入射至所述第一引导区的激发光反射至所述第一引导组件。
  6. 根据权利要求5所述的光源结构，其特征在于，所述第一引导组件包括第三反射镜，所述第三反射镜用于反射自所述第一引导区出射的激发光，所述第二反射镜和所述第三反射镜分别设置在所述色轮的相对两侧，入射至所述第一引导区的激发光被引导至所述第二反射镜，所述激发光经过所述第二反射镜的反射后进入所述第一引导区并出射至所述第三反射镜，所述第三反射镜将所述激发光反射至所述出射光路。
  7. 根据权利要求1所述的光源结构，其特征在于，所述第一引导区所在平面相对所述第二引导区所在平面倾斜设置，所述第一引导区用于将入射的激发光反射至所述第一引导组件。
  8. 根据权利要求1所述的光源结构，其特征在于，所述第二引导组件包括第四反射镜和第一二向色片，入射至所述第二引导区并被所述第二引导区引导出射的激发光被所述第四反射镜反射至所述第一二向色片，所述第一二向色片用于将来自所述第四反射镜的激发光引导至所述光转换区，并用于引导所述光转换区激发产生的受激光。
  9. 根据权利要求1所述的光源结构，其特征在于，所述光源结构还包括合光装置和匀光装置，自所述第二引导组件出射的受激光被所述合光装置引导至所述匀光装置，自所述第一引导组件出射的激发光被所述合光装置引导至所述匀光装置。
  10. 根据权利要求1至9任一所述的光源结构，其特征在于，所述光源结构还包括补充光源和第二二向色片，所述补充光源用于发射补充光，所述第二二向色片位于所述色轮和所述第一引导组件之间，用于将所述第一引导区出射的激发光以及所述补充光源发射的补充光引导至所述第一引导组件。
  11. 一种色轮，其特征在于，所述色轮包括同心设置的内圈和外圈，所述外圈包括第一引导区和第二引导区，所述第一引导区和所述第二引导区分别用于引导入射至其上的激发光，且使所述激发光沿不同的方向出射，所述内圈包括光转换区，所述光转换区用于在所述激发光的激发下产生受激光。
  12. 根据权利要求11所述的色轮，其特征在于，所述第一引导区所在平面相对所述第二引导区所在平面倾斜设置，所述第一引导区用于反射所述激发光。
  13. 一种投影装置，其特征在于，包括如权利要求1-10任一项所述的光源结构。
PCT/CN2020/137104 2020-01-07 2020-12-17 光源结构、色轮及投影装置 WO2021139501A1 (zh)

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