WO2020135302A1 - 光源系统及投影设备 - Google Patents

光源系统及投影设备 Download PDF

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Publication number
WO2020135302A1
WO2020135302A1 PCT/CN2019/127282 CN2019127282W WO2020135302A1 WO 2020135302 A1 WO2020135302 A1 WO 2020135302A1 CN 2019127282 W CN2019127282 W CN 2019127282W WO 2020135302 A1 WO2020135302 A1 WO 2020135302A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
color
laser
source system
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Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/127282
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English (en)
French (fr)
Inventor
胡飞
孙微
郭祖强
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication of WO2020135302A1 publication Critical patent/WO2020135302A1/zh
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Ceased legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light

Definitions

  • the invention relates to the technical field of projection, in particular to a light source system and a projection device.
  • the primary color light is generally generated in the manner shown in FIGS. 1A and 1B.
  • the first light source 10 emits blue laser light through the area diaphragm 20 to excite the wavelength conversion element 50 to generate timing
  • the red, green, and blue light forms the three primary colors required by the projection system.
  • the blue laser is used as the blue primary color light after the partial coherence is eliminated by the scattering powder on the wavelength conversion element 50.
  • the blue laser excites the green color on the wavelength conversion element 50
  • the phosphor powder obtains green primary color light
  • the blue laser light excites the orange-based phosphor powder on the wavelength conversion element 50 or the yellow phosphor powder, and then is processed by a filter to obtain red primary color light. Both the fluorescence and laser light emitted after being reflected by the wavelength conversion element 50 will be lost when passing through the area membrane 20.
  • a supplementary light source 11 with a wavelength different from that of the first light source 10 is added to the light source system. Since the proportion of fluorescence is reduced, the loss of fluorescence on the regional membrane 20 is also relatively reduced, but the laser and fluorescence are on the regional membrane There will still be losses in the position of the sheet 20, and the loss of laser light and fluorescence on the area membrane 20 will also cause the problem of color uniformity.
  • one aspect of the present invention provides a light source system, including:
  • the first light source is used to emit excitation light
  • the second light source is used to emit laser light as supplementary light
  • the wavelength conversion element includes a conversion area, and the conversion area is used to perform wavelength conversion on the excitation light emitted from the first light source to obtain a received laser; the received laser light emitted from the wavelength conversion element and the supplementary light emitted from the second light source are at The entrances of the uniform light device are arranged side by side.
  • a second aspect of the present invention provides a projection apparatus including the light source system described above.
  • the received laser light emitted by the wavelength conversion element and the supplementary light emitted by the second light source are arranged side by side at the entrance of the homogenizing device, so that when the laser light and the supplementary light are combined, the loss of the laser light can be reduced To improve light efficiency.
  • FIG. 1A is a schematic structural view of an existing projection device.
  • FIG. 1B is a schematic structural view of an existing projection device.
  • FIG. 2 is a schematic structural diagram of a light source system provided by the first embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the structure of the wavelength conversion element shown in FIG. 2.
  • FIG. 4 is a schematic diagram of the position of the light spot at the entrance of the uniform light device shown in FIG. 2.
  • FIG. 5 is a schematic structural diagram of a light source system provided in a second embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a light source system provided by a third embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the wavelength conversion element shown in FIG. 6.
  • FIG. 8 is a schematic structural diagram of a light source system according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the structure of the wavelength conversion element shown in FIG. 8.
  • FIG. 10 is a schematic structural diagram of a light source system according to a fifth embodiment of the present invention.
  • FIG. 11 is a schematic diagram of the structure of the wavelength conversion element shown in FIG. 10.
  • Light source system 100 200, 300, 400, 500
  • the first luminous body 121 The first luminous body 121
  • the invention provides a laser fluorescent light source system and a projection device.
  • a new light combining method is used to realize the combination of laser light and fluorescent light.
  • the received laser light emitted by the light source system is fluorescence
  • the supplementary light emitted is laser light
  • the received light emitted by the light source system The laser and supplementary light are arranged side by side in space, on the one hand, it is helpful to reduce the loss caused by the laser and supplementary light in the light combining system within the light source system, and it is conducive to improving the light efficiency;
  • the area of the light spot formed at the entrance is smaller than the area of the supplementary light at the entrance of the uniform light device, which can reduce the amount of fluorescence, increase the amount of laser, and effectively expand the color gamut.
  • the projection equipment also includes a light modulation device for modulating the light emitted by the light source system, such as DMD (Digital Micro-mirror Device), LCD (Liquid Crystal Display) or LCOS (Liquid Crystal) On Silicon, liquid crystal on silicon).
  • a light modulation device for modulating the light emitted by the light source system, such as DMD (Digital Micro-mirror Device), LCD (Liquid Crystal Display) or LCOS (Liquid Crystal) On Silicon, liquid crystal on silicon).
  • FIG. 2 is a schematic structural diagram of a light source system 100 according to a first embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a wavelength conversion element 150 and a scattering element D shown in FIG. The schematic diagram of the light spot at the entrance 181 of the light homogenizing device 180 is shown.
  • the light source system 100 includes a first light source 110, a second light source 120, a wavelength conversion element 150, a scattering element D, and a uniform light device 180.
  • the first light source 110 is used to emit excitation light
  • the second light source 120 is used to emit laser light as supplementary light
  • the wavelength conversion element 150 includes a conversion area 152, and the conversion area 152 is used to perform wavelength conversion on the excitation light emitted from the first light source 110
  • the scattering element D is used to receive the supplementary light emitted by the second light source 120 and scatter the supplementary light, the scattering element D and the wavelength conversion element 150 are arranged side by side in space, so that the light emitted through the wavelength conversion element 150
  • the laser light and the supplementary light emitted through the scattering element D are arranged side by side in space; the light rays emitted by the wavelength conversion element 150 and the scattering element D are emitted from the light source system 100 after being uniformly irradiated by the uniform light
  • the scattering element D is provided outside the wavelength conversion element 150.
  • the scattering element D may also be disposed inside the wavelength conversion element 150.
  • the scattering element D may be disposed beside the wavelength conversion element 150 as shown in FIG. 2, or may be disposed at another position of the supplementary light exit optical path, as long as the laser beam emitted by the wavelength conversion element 150 and the emission of the scattering element D are supplemented
  • the light spots when the light is combined at the uniform light device may be arranged side by side.
  • the first light source 110 may be a blue light source for emitting blue excitation light.
  • the first light source 110 includes a light emitter 111, a lens 112, and a uniform light device 113.
  • the light-emitting body 111 may include a blue laser or a blue light-emitting diode, and the number of lasers or light-emitting diodes in the specific light-emitting body 111 may be selected according to needs.
  • the first light source 110 may also be an ultraviolet light source or other color light source.
  • the lens 112 is used to collimate the excitation light emitted by the luminous body 111, and the collimated excitation light is emitted after being homogenized by the homogenizing device 113, which may be an optical integrating rod or a compound eye lens. It can be understood that, in some embodiments, especially in a miniaturized light source system, the uniform light device 113 may be omitted.
  • the second light source 120 is used to emit laser light as supplementary light, and the supplementary light includes laser lights of multiple colors. Further, the second light source 120 includes a first luminous body 121, a second luminous body 122, and a third luminous body 123, wherein the first luminous body 121 is used to emit a first color laser, and the second luminous body 122 is used to emit a first The two-color laser and the third illuminant 123 are used to emit the third-color laser. In this embodiment, the first color is red, the second color is green, and the third color is blue. It can be understood that the first color, the second color, and the third color are not limited to the above colors.
  • the second light source 120 further includes necessary lenses and uniform light devices to collimate and uniformly supplement the light.
  • the wavelength conversion element 150 includes a conversion area 152, which is provided with a wavelength conversion material for generating laser light of other colors under the excitation of blue excitation light.
  • the wavelength conversion material is fluorescent powder
  • the received laser light is fluorescent light.
  • the received laser light includes first color fluorescence (red fluorescence) and second color fluorescence (green fluorescence).
  • the conversion area 152 includes a first section O1 and a second section G1, wherein the first section O1 is provided with an orange phosphor and the second section G1 is provided with a green phosphor.
  • the first segment O1 and the second segment G1 in the conversion region 152 are located on the optical path of the excitation light in time sequence.
  • the conversion region 152 emits orange fluorescence and green fluorescence in sequence, and orange fluorescence is a mixture of red fluorescence and green fluorescence.
  • yellow phosphor can be used instead of orange phosphor, or red phosphor can be used instead of orange phosphor.
  • the multiple partitions of the conversion area 152 are respectively provided with yellow/or orange phosphor, red phosphor, and green phosphor.
  • the light source system 100 is further provided with a driving unit 151 and a substrate 154, wherein the substrate 154 is used to carry the wavelength conversion element 150, and the substrate 154 may be made of a metal material or a transparent material.
  • the driving unit 151 is disposed at the bottom of the substrate 154 and is used to drive the substrate 154 to perform periodic motion.
  • the wavelength conversion element 150 has a ring shape
  • the substrate 154 has a circular shape
  • the wavelength conversion element 150 is provided on the surface of the substrate 154.
  • the scattering element D is a scattering layer or a scattering sheet coated on the surface of the substrate 154, and is used to transmit and diffuse supplementary light to eliminate the coherence of the supplementary light, thereby alleviating the speckle effect generated by the supplementary light.
  • the scattering element D has a circular ring shape and is disposed on the substrate 154. Further, the wavelength conversion element 150 and the scattering element D are disposed on the same surface of the substrate 154 and are arranged side by side.
  • the excitation light emitted by the first light source 110 is guided to the conversion area 152 of the wavelength conversion element 150 after being guided by the first light combining element 130, and the supplementary light emitted by the second light source 120 passes through the first light combining element 130. After being guided, it is incident on the scattering element D.
  • the excitation light emitted by the first light source 110 and the supplementary light emitted by the second light source are guided by the first light combining element 130 and enter the conversion area 152 and the surface of the scattering element D, respectively. Since the excitation light and the supplementary light are respectively irradiated to different optical elements on the substrate 154, the optical axes of the excitation light and the supplementary light incident on the surface of the first light combining element 130 do not coincide. For example, the excitation light is incident on the first part of the first light combining element 130, and the supplementary light is incident on the second part of the first light combining element 130.
  • the first part and the second part may be adjacent or spaced apart, and the first part and the second part Without overlapping, it can be seen from FIG. 2 that the first part is the upper half of the first light combining element 130 and the second part is the lower half of the first light combining element 130.
  • the first part of the first light combining element 130 is used to transmit excitation light or to provide an antireflection film, and the second part is used to reflect the red, green, and blue laser light in the supplementary light, and a reflective film may be provided.
  • the excitation light and the supplementary light are both lasers with a small divergence angle
  • the area of the first portion and the second portion of the first light combining element 130 is larger than the area of the excitation light and supplementary light irradiating the first light combining element 130, then The light loss generated by the excitation light and the supplementary light at the first light combining element 130 can be reduced to improve the light efficiency.
  • the excitation light and/or supplementary light incident on the surface of the first light combining element 130 is scattered light, that is, the excitation light and/or supplementary light is in the first light combining element 130 ,
  • the wavelength conversion element 150 and the scattering element D form a relatively large light spot.
  • the excitation light and the supplementary light are irradiated to different optical elements on the substrate 154, when the excitation light and the supplementary light are incident on the surface of the first light combining element 130
  • the first area is set according to the light intensity distribution of the two light rays on the surface of the first light combining element 130
  • the second area With the second area, the part of the spot with relatively large intensity of excitation light falls into the first part, and the part of the spot with relatively large intensity of supplementary light falls into the second part, which is helpful to reduce the excitation light to fall into the second part
  • the proportion of the part and the proportion of the supplementary light falling into the first part are beneficial to reduce the light loss of the excitation light and the supplementary light at the first light combining element 130 and improve the light efficiency.
  • the wavelength conversion element 150 has a circular ring shape.
  • the conversion areas 152 are fan-shaped.
  • the scattering element D has a circular ring shape.
  • the scattering element D is disposed inside or outside the wavelength conversion element 150.
  • the inner diameter of the wavelength conversion element 150 is small, and the scattering element D is provided inside the wavelength conversion element 150.
  • the scattering element D has a large inner diameter size with respect to the wavelength conversion element 150, and the scattering element D is provided outside the wavelength conversion element 150. It can be understood that any two of the first section O1, the second section G1, and the scattering element D may be arranged at intervals or adjacently.
  • the substrate 154 includes a filter element 156.
  • the filter element 156 has a ring shape and is disposed at the edge of the substrate 154.
  • the filter element 156 is disposed corresponding to the wavelength conversion element 150.
  • the filter element 156 and the wavelength conversion element The 150 is stacked to intercept part of the light in the laser and transmit the color components required in the laser, improve the color purity of the emitted light, and expand the color gamut covered by the emitted light.
  • the outer contour size of the filter element 156 is the same as the conversion area 152. In one embodiment, both the conversion area 152 and the scattering element D are adhered to the surface of the filter element 156 by an adhesive.
  • the adhesive may use optical glue, that is, the light incident side of the filter element 156 is provided with a scattering surface In the element D and the wavelength conversion element 150, the scattered supplementary light emitted by the scattering element D enters the filter element 156.
  • the filter element 156 is connected to the driving unit 151.
  • the filter element may also be provided on the periphery of the wavelength conversion area.
  • the filter element 156 includes a first segment O2 and a second segment G2, wherein the first segment O2 is used to filter the orange fluorescence emitted from the first segment O1, and the second segment G2 It is used to filter the green fluorescence emitted from the second section G1.
  • the second section G2 is provided with a green filter
  • the orange fluorescence emitted from the first section O2 includes first color fluorescence and second color fluorescence
  • the first section O2 may be provided with a red filter corresponding to the orange fluorescence
  • the light sheet obtains the red fluorescence incident on the uniform light device 180, and further obtains the red primary color light emitted from the light source system 100.
  • the first section O2 is provided with a filter for transmitting the first color fluorescence and part of the second color fluorescence.
  • the received laser light and supplementary light output after being filtered by the filter element 156 pass through a necessary relay system and enter the light homogenizing device 180, thereby achieving spatial light combining.
  • the wavelength conversion element 150 in the present invention may also be a fixed phosphor sheet, and a filter element and a scattering element may be provided on the phosphor sheet to achieve corresponding functions.
  • the light source system 100 may further include a control device (not shown).
  • a control device not shown.
  • the orange fluorescence emitted by the wavelength conversion element 150 includes the first color fluorescence, which is controlled by the control device
  • the second light source 120 emits the first color laser light, and turns off other supplementary light sources to ensure that the first color laser light and the first color fluorescent light enter the homogenizing device 180 at the same time.
  • the control device controls the second light source 120 to emit second-color laser light.
  • the first-color fluorescence and the first-color laser in the light-shading device 180 are metachromatic light, that is, the first-color fluorescence and the first-color laser belong to the same color, both are red, and the first-color laser and the first-color fluorescent
  • the spectral curve is different.
  • the bandwidth of the first color laser is narrower in bandwidth, the energy is more concentrated, the color purity is higher, and the color gamut covers a wider range.
  • the bandwidth of the first color fluorescence spectrum curve is wider, the energy is more dispersed, and the color purity is lower. Covers a narrow gamut.
  • the combination of the first-color fluorescence and the first-color laser in the uniform light device 180 is beneficial to expand the color gamut range covered by the first color light (red primary color light) emitted by the light source system 100.
  • the second-color fluorescence and the second color The laser light is of the same color and different spectrum.
  • the combination of the second-color fluorescent light and the second-color laser light in the uniform light device 180 is beneficial to expand the color gamut range covered by the second color light (green primary color light) emitted by the light source system 100; the excitation light and the third light
  • the color laser is metamerism light.
  • the entrance 181 of the uniform light device 180 has a square shape, and the plane where the entrance 181 is located includes a first area p representing the supplementary light spot and a second area q representing the supplementary light spot.
  • the spots formed by the first color laser, the second color laser, and the third color laser in the supplementary light at the entrance 181 are all located at the position of the first region p, and at this time, the supplementary light has the same optical path , Can simplify the design of the optical path.
  • the first color laser and the second color laser in the supplementary light have the same optical path refers to the optical path excluding the second light source to the optical element closest to it, because the first color laser and the second color are respectively It is emitted by different lasers, and generally different lasers cannot be placed in the same location.
  • the lasers of different colors can be placed in the same position, or the lasers of different colors are integrated into one device, then the first color laser and the second color laser both exit from the second light source and enter the uniform light device 180.
  • the same light path is more advantageous for simplifying the design of the light path, but it is not excluded that those skilled in the art only set part of the light paths to be the same in order to circumvent the patent.
  • the spot formed by the laser and the spot formed by the first color laser are arranged side by side, and the spot formed by the laser is located in the second region q.
  • the supplementary light may not include the second color laser and/or the third color laser.
  • both the supplementary laser and the metachromatic received laser are at the entrance of the dodging device 180, the sum of the areas of the first region p and the second region q is smaller than the area of the inlet 181 of the dodging device 180, thereby preventing the light source from entering the dodging After the device 180, a larger loss occurs.
  • setting the area of the first region p to be smaller than the area of the second region q is beneficial to reduce the proportion of the fluorescent light emitted by the light source system 100 and expand the color gamut.
  • the first area p and the second area q are arranged side by side and do not overlap, or the overlap area is less than a preset ratio, which is beneficial to improve the uniformity of the light emitted by the light source system 100. It can be understood that the mutual position relationship and the area between the first region p and the second region q can be adjusted according to the needs of the optical path.
  • first area p and the second area q may be set to other shapes as needed.
  • the received laser beam emitted from the wavelength conversion element 150 is incident into the second region q, the efficiency of the excitation light to excite the received laser beam is unchanged, and the received laser power density is basically unchanged, and the conversion zone 152 still has a high conversion efficiency efficiency.
  • the peripheral contour of the area composed of the first area p and the second area q matches the inlet 181.
  • the "matching" in this embodiment means that the peripheral contour is the same as or similar to the shape of the inlet 181, such as square, bar or circle, etc.; and the size of the peripheral contour is the same as or similar to the size of the inlet 181, such as In one embodiment, the difference between the area of the peripheral profile and the inlet 181 is less than 10% of the area of the inlet 181.
  • the difference between the area of the peripheral profile and the inlet 181 is less than 5% of the area of the inlet 181 In one embodiment, the difference between the area of the peripheral profile and the inlet 181 is less than 2% of the area of the inlet 181. In one embodiment, the area of the peripheral profile is as large as the inlet 181.
  • FIG. 5 is a schematic structural diagram of a light source system 200 provided in a second embodiment of the present invention.
  • the main difference between the light source system 200 and the light source system 100 is that the second light source 220 in the light source system 200 has no third illuminant 123 compared to the second light source 120, so there is no third color laser light in the supplementary light.
  • the light combining element is a dichroic sheet that transmits blue light and reflects light of other colors.
  • FIG. 6 is a schematic structural diagram of a light source system 300 according to a third embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a wavelength conversion element 350 shown in FIG.
  • the main difference between the light source system 300 and the light source system 100 is that the conversion area 352 in the wavelength conversion element 350 in the light source system 300 reflects the received laser light.
  • the conversion area 352 includes a first section O1 and a second section G1 for generating One-color fluorescence and second-color fluorescence.
  • the filter element 356 is disposed at the periphery of the wavelength conversion element 350 and is also used to transmit third color laser light.
  • the filter element 356 includes a first section O2 and a second section G2, and the first section O2 and the second section
  • the outer outline size of G2 is larger than the conversion area 352 and the scattering element D, and the scattering element D is used to scatter the first color laser light and the second color laser light.
  • the light source system 300 further includes a second light combining element 340.
  • the excitation light emitted by the first light source 310 is irradiated to the wavelength conversion element 350 through the second light combining element 340, and the second light combining element 340 also guides the wavelength conversion element 350 to exit
  • the first light combining element 330 is irradiated with laser light.
  • the first color laser light and the second color laser light emitted by the second light source 320 pass through the scattering element D and enter the second light combining element 340.
  • the second light combining element 340 is also used to guide the first color laser light emitted by the scattering element D and The second color laser light is incident on the first light combining element 330.
  • the excitation light is a blue laser
  • the received laser includes orange fluorescence and green fluorescence
  • the first color laser and the second color laser are a red laser and a green laser
  • the first light combining element 330 and the second light combining element 340 may It is a translucent anti-yellow dichroic film.
  • the first light-combining element 330 is used to guide the light emitted by the second light-combining element 340 to enter the entrance 381 of the light homogenizing device 380 through the filter element 356, and also to guide the filtered light of the third color laser light emitted by the second light source 320
  • the element 356 enters the entrance 381 of the uniform light device 380.
  • the optical axes of the received laser light and supplementary light incident on the first light combining element 330 do not overlap.
  • the first light combining element 330 can process different colors of light according to the intensity distribution of the incident laser light and supplementary light, which is beneficial to The loss of light on the surface of the first light combining element 330 is reduced.
  • the spot light formed by the first color laser light and the second color laser light in the supplementary light passing through the scattering element D at the entrance 381 of the homogenizing device 380 is located in the first region p; the received laser light and the first color laser light are incident on the first light combining element 330 and The optical axis of the surface of the filter element 356 does not coincide, and the spot formed by the laser at the entrance 381 of the homogenizing device 380 is located in the second area q; the third color laser in the supplementary light is combined with the first color laser and the received laser incident first
  • the optical axes of the surfaces of the optical element 330 and the filter element 356 may or may not coincide, that is, the position of the spot formed by the third color laser light in the supplementary light at the entrance 381 of the homogenizing device 380 may be the same as the first area p different.
  • the control device controls the first light source 310 to emit excitation light to excite the conversion region 352 to generate the first color fluorescence and the second color fluorescence in time series, and to control the second according to the section of the conversion region 352 located on the optical path of the excitation light
  • the light source 320 emits supplementary light of a corresponding color.
  • the excitation light excites the conversion region 352 to generate first-color fluorescence and second-color fluorescence at the time, and the first-color laser light (second-color laser light) passes through the scattering element D and enters the first-color fluorescence light (second-color fluorescence) to the first
  • the light-combining element 330, the filter element 356, and the entrance 381 of the light homogenizing device 380, the first color laser light and the second color laser light in the supplementary light are respectively incident on the first region p, and the received laser light is incident on the second region q.
  • the control device controls the third light emitting body 323 in the second light source 320 to emit third color laser light, and the first light source 310 does not emit light.
  • the third color laser light passes through the first light combining element 330 and the filter element 356 to enter the entrance 381 of the light homogenizing device 380 in this order.
  • the optical axes of the first color fluorescence and the first color laser and the second color fluorescence and the second color laser are reflected by the first light combining element 330 to the filter element 356 without overlapping After entering the entrance 381 of the homogenizing device 380 at different positions.
  • the scattering section may be provided on the wavelength conversion element, or the scattering section may not be provided.
  • the scattering section is set, the blue primary color light emitted by the light source system is formed by combining the scattered blue excitation light and the supplementary blue laser light.
  • the scattered blue excitation light and the supplementary blue laser light spot at the entrance of the uniform light device Arranged side by side to reduce the combined light loss; when no scattering section is provided, the blue primary light emitted by the light source system is provided by the supplementary blue laser.
  • the excitation light emitted from the scattering region B1 and the received laser light emitted from the wavelength conversion element 150 enter the inlet 181 along the same optical path, and the excitation light emitted from the scattering region B1 also enters the second region q of the inlet 181.
  • FIG. 8 is a schematic structural diagram of a light source system 400 according to a fourth embodiment of the present invention.
  • the main difference between the light source system 400 and the light source system 300 is that the third light emitter is omitted from the second light source 420 of the light source system 400, the third color light emitted from the light source system 400 is provided by the first light source 410, and the conversion area of the wavelength conversion element 450 452 is used to transmit the received laser light, and the wavelength conversion element 450 includes a scattering region B1 for scattering excitation light, and the scattering region B1 and the conversion region 452 are alternately located on the optical path of the excitation light.
  • the supplementary light, the laser light emitted from the conversion region 452 and the excitation light emitted from the scattering region B1 pass through the scattering element D, the first light combining element 430, and the filter element 456 and enter the entrance 481 of the uniform light device 480.
  • the first light combining element 430 partially transmits excitation light and partially reflects laser light and scattered excitation light.
  • the optical paths of the excitation light, the first color laser light, and the second color laser light may be the same or different.
  • the spots formed on the second light combining element 431 by the first color laser light and the first color fluorescence light, and the second color laser light and the second color fluorescence light are arranged side by side.
  • the first light source 410 and the second light source 420 are respectively disposed on both sides of the wavelength conversion element 450.
  • the excitation light emitted by the first light source 410 irradiates the light incident side of the conversion region 452 or the scattering region B1, the conversion region 452 and the scattering region B1
  • the light exit side of (FIG. 9) respectively emits the laser light and the scattered excitation light to the guide elements of the scattering element D, such as a mirror, a dichroic beam splitter, and so on.
  • the supplementary light emitted by the second light source 420, the scattered excitation light, and the received laser light enter the light homogenizing device 480 after passing through the scattering element D, the first light combining element 430, and the filter element 456.
  • FIG. 10 is a schematic structural diagram of a light source system 500 according to a fifth embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a wavelength conversion element 550 shown in FIG. 10.
  • the main difference between the light source system 500 and the light source system 100 is that the wavelength conversion element 550 reflects the received laser light.
  • the filter element 556 is disposed at the periphery of the wavelength conversion element 550, that is, the size of the filter element 556 is larger than the wavelength conversion element 550.
  • the supplementary light and the received laser light emitted from the conversion area 552 enter the first light combining element 530 and the filter element 556 at different positions in side-by-side light spots.
  • the light emitted by the filter element 556 enters the entrance 581 of the homogenizing device 580.
  • the first color fluorescence and the first color laser light are incident on the surface of the first light combining element 530 and the filter element 556, and the second color fluorescence and the second color laser light are incident on the first light combining element 530 and the filter
  • the light spots on the surface of the optical element 556 are arranged side by side.

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Abstract

一种光源系统(100)与投影设备，光源系统(100)包括：第一光源(110)，用于发出激发光；第二光源(120)，用于发出激光作为补充光；波长转换元件(150)，包括转换区(152)，转换区(152)用于对第一光源(110)出射的激发光进行波长转换以得到受激光；波长转换元件(150)出射的受激光与第二光源(120)出射的补充光在匀光装置(180)入口处并排排列，从而在受激光与补充光合光时，能够减少受激光的损失，提高光效。

Description

光源系统及投影设备 技术领域
本发明涉及投影技术领域，尤其涉及一种光源系统及投影设备。
背景技术
本部分旨在为权利要求书中陈述的本发明的具体实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。
在单片式DMD投影系统中，一般会采用图1A与图1B所示的方式产生基色光，如图1A所示，第一光源10发出蓝光激光经过区域膜片20激发波长转换元件50产生时序的红、绿、蓝光，从而构成投影系统所需要的三基色光，其中蓝激光经波长转换元件50上的散射粉消除部分相干性后作为蓝基色光，蓝激光激发波长转换元件50上的绿色荧光粉得到绿基色光，同时，蓝激光激发波长转换元件50上的偏橙色荧光粉或者激发黄色荧光粉后再经滤波片处理得到红基色光。被波长转换元件50反射后出射的荧光与激光在经过区域膜片20时都会发生损失。
如图1B所示，光源系统中加入了波长不同于第一光源10的补充光源11，由于荧光的比例减少，因此荧光在区域膜片20上的损失也相对减少，但激光和荧光在区域膜片20的位置还是会产生损失，并且由于激光与荧光在区域膜片20上的损失还会导致颜色均匀性的问题。
发明内容
有鉴于此，本发明一方面提供一种光源系统，包括：
第一光源，用于发出激发光；
第二光源，用于发出激光作为补充光；
波长转换元件，包括转换区，所述转换区用于对所述第一光源出射的激发光进行波长转换以得到受激光；所述波长转换元件出射的受 激光与第二光源出射的补充光在匀光装置入口处并排排列。
本发明第二方面提供一种投影设备，包括如上所述的光源系统。
本发明提供的光源系统中，通过设置波长转换元件出射的受激光与第二光源出射的补充光在匀光装置入口处并排排列，从而在受激光与补充光合光时，能够减少受激光的损失，提高光效。
附图说明
为了更清楚地说明本发明实施例/方式技术方案，下面将对实施例/方式描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例/方式，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1A为现有投影设备中结构示意图。
图1B为现有投影设备中结构示意图。
图2为本发明第一实施方式提供的光源系统结构示意图。
图3为图2所示的波长转换元件的结构示意图。
图4为图2所示的匀光装置的入口处的光斑位置示意图。
图5为本发明第二实施方式中提供的光源系统的结构示意图。
图6为本发明第三实施方式提供的光源系统的结构示意图。
图7为图6所示的波长转换元件的结构示意图。
图8为本发明第四实施方式提供的光源系统的结构示意图。
图9为图8所示的波长转换元件的结构示意图。
图10为本发明第五实施方式提供的光源系统的结构示意图。
图11为图10所示的波长转换元件的结构示意图。
主要元件符号说明
光源系统          100、200、300、400、500
第一光源          10、110、310、410、510
发光体            111
透镜              112
匀光器件           113
第二光源           120、220、320、420
第一发光体         121
第二发光体         122
第三发光体         123、323
第一合光元件       130、330、430、530
波长转换元件       50、150、350、450、550
驱动单元           151
转换区             152、352、452、552
第一区段           O1、O2
第二区段           G1、G2
散射元件           D
散射区             B1
基板               154
滤光元件           156、356、456、556
匀光装置           180、280、380、480、580
入口               181、281、381、481、581
第一区域           p
第二区域           q
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施例对本发明进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
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。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。
本发明提供一种激光荧光光源系统及投影设备，利用一种新的合光方式实现激光与荧光的合光，光源系统出射的受激光为荧光，出射的补充光为激光，光源系统出射的受激光与补充光在空间上并排排列，一方面有利于减少受激光与补充光在光源系统内部合光过程中产生的损失，有利于提高光效；另一方面，设置受激光在匀光装置的入口处形成的光斑面积小于补充光在匀光装置入口的面积，从而可以降低荧光用量，提高激光用量，有效扩展色域。投影设备中还包括用于对光源系统出射光线进行调制的光调制装置，比如，DMD(Digital Micro-mirror Device，数字微镜设备)，LCD(Liquid Crystal Display，液晶显示器)或者是LCOS(Liquid Crystal On Silicon，硅基液晶)。
实施例一：
请参阅图2-图4，图2为本发明第一实施方式提供的光源系统100结构示意图，图3为图2所示的波长转换元件150及散射元件D的结构示意图，图4为图2所示的匀光装置180的入口181处的光斑示意图。
光源系统100包括第一光源110、第二光源120、波长转换元件150、散射元件D与匀光装置180。其中，第一光源110用于发出激发光，第二光源120用于发出激光作为补充光；波长转换元件150包括转换区152，转换区152用于对第一光源110出射的激发光进行波长转换以得到受激光；散射元件D用于接收第二光源120出射的补充光并对补充光进行散射，散射元件D与波长转换元件150在空间上并排排列，以使经波长转换元件150出射的受激光与经散射元件D出射的补充光在空间上并排排列；波长转换元件150与散射元件D出射的光线经过匀光装置180的匀光后自光源系统100出射。
在本实施例中，散射元件D设置于波长转换元件150的外侧。当 然，在其他实施例中，散射元件D也可以设置于波长转换元件150的内侧。另外，散射元件D可以如图2所示设置在波长转换元件150的旁侧，也可以设置在补充光出光光路的其他位置，只要保证波长转换元件150出射的受激光与散射元件D出射的补充光在匀光装置处合光时的光斑并排排列即可。
具体地，第一光源110可以为蓝色光源，用于发出蓝色激发光。第一光源110包括发光体111、透镜112及匀光器件113。其中，发光体111可以包括蓝色激光器或蓝色发光二极管，具体发光体111中激光器或者发光二极管的数量可以根据需要进行选择。在一种实施方式中，第一光源110还可以是紫外光源或其他颜色光源。进一步地，透镜112用于对发光体111出射的激发光进行准直，准直后的激发光经过匀光器件113的均匀化后出射，匀光器件113可以为光学积分棒或复眼透镜。可以理解的是，在一些实施方式中，特别是在小型化的光源系统中，匀光器件113是可以省略的。
第二光源120用于发出激光作为补充光，补充光中包括多种颜色激光。进一步地，第二光源120包括第一发光体121、第二发光体122以及第三发光体123，其中，第一发光体121用于发出第一色激光，第二发光体122用于发出第二色激光，第三发光体123用于发出第三色激光。在本实施方式中，第一色为红色，第二色为绿色，第三色为蓝色，可以理解的是，第一色、第二色与第三色并不限于上述颜色。第二光源120中还包括必要的透镜与匀光器件，以对补充光进行准直与匀光。
如图2、图3所示，波长转换元件150包括转换区152，转换区152设置有波长转换材料，用于在蓝色激发光的激发下产生其他颜色的受激光，在本实施方式中，波长转换材料为荧光粉，受激光为荧光，受激光包括第一色荧光(红色荧光)与第二色荧光(绿色荧光)。如图3所示，转换区152包括第一区段O1与第二区段G1，其中，第一区段O1设置有橙色荧光粉，第二区段G1设置有绿色荧光粉。转换区152中的第一区段O1与第二区段G1时序位于激发光的光路上，转换区152时序出射橙色荧光与绿色荧光，橙色荧光为红色荧光与绿色荧 光的混合光。
可以理解的是，在其他实施方式中，可以采用黄色荧光粉代替橙色荧光粉，或者采用红色荧光粉代替橙色荧光粉。在一种实施方式中，转换区152的多个分区分别设置有黄/或者橙色荧光粉、红色荧光粉以及绿色荧光粉。
光源系统100还设置有驱动单元151以及基板154，其中基板154用于承载波长转换元件150，基板154可以是金属材料制成或透明材料制成。驱动单元151设置于基板154的底部，用于带动基板154做周期性运动。在本实施方式中，波长转换元件150呈环形，基板154呈圆形，波长转换元件150设置于基板154的表面。
散射元件D为涂覆在基板154表面的散射层或一散射片，用于透射并散射补充光，以消除补充光的相干性，从而缓解补充光产生的散斑效应。散射元件D呈圆环形并设置于基板154上，进一步地，波长转换元件150与散射元件D设置于基板154的同一表面上并且并排排布。
本实施方式中，第一光源110发出的激发光经过第一合光元件130的引导后入射至波长转换元件150的转换区152，第二光源120发出的补充光经过第一合光元件130的引导后入射至散射元件D。
如图2所示，第一光源110出射的激发光与第二光源出射的补充光经过第一合光元件130的引导后分别入射至转换区152与散射元件D的表面。由于激发光与补充光分别照射至基板154上的不同的光学元件上，从而激发光与补充光入射至第一合光元件130表面的光轴不重合。比如，激发光入射至第一合光元件130的第一部分，补充光入射至第一合光元件130的第二部分，第一部分与第二部分可以相邻也可以间隔，第一部分与第二部分不重叠，从图2中看出，第一部分为第一合光元件130的上半部分，第二部分为第一合光元件130的下半部分。第一合光元件130的第一部分用于透射激发光或设置增透膜，第二部分用于反射补充光中的红、绿、蓝激光，可以设置反射膜。由于激发光与补充光均为激光其发散角较小，设置第一合光元件130的第一部分与第二部分的面积分别大于激发光及补充光照射至第一合光 元件130的面积，则可以减少直至避免激发光与补充光在第一合光元件130处产生的光损失从而提高光效。
可以理解的是，在一种实施方式中，入射至第一合光元件130表面的激发光及/或补充光为散射后的光线，即激发光及/或补充光在第一合光元件130、波长转换元件150以及散射元件D表面形成的光斑较大，由于激发光与补充光分别照射至基板154上的不同的光学元件上，当激发光与补充光入射至第一合光元件130表面的光轴不重叠时，由于激发光与补充光在第一合光元件130表面光强集中的位置不完全重叠，根据第一合光元件130表面的两种光线的光强分布设置第一区域与第二区域，使得激发光光强相对较大的部分光斑落入第一部分中，补充光中光强相对较大的部分光斑落入第二部分，从而有利于减小激发光落入第二部分的比例以及补充光落入第一部分的比例，进而有利于减小激发光与补充光在第一合光元件130的光线损失，并提高光效。
本实施方式中，波长转换元件150呈圆环形。转换区152均呈扇环形。散射元件D呈圆环形，散射元件D设置于波长转换元件150的内侧或外侧，本实施方式中，相对于波长转换元件150的内径尺寸小，散射元件D设置于波长转换元件150的内侧。在其他实施方式中，散射元件D相对于波长转换元件150的内径尺寸大，散射元件D设置于波长转换元件150的外侧。可以理解的是，第一区段O1、第二区段G1、散射元件D中任意两者之间可以间隔设置或相邻设置。
在本实施方式中，基板154包括滤光元件156，滤光元件156呈环形并设置于基板154的边缘，滤光元件156对应波长转换元件150设置，进一步地，滤光元件156与波长转换元件150层叠设置，以截留受激光中的部分光线，并透射受激光中需要的颜色成分，提高出射光线的色纯度，扩大出射光线覆盖的色域范围。进一步地，在本实施方式中，滤光元件156的外围轮廓尺寸与转换区152相同。在一种实施方式中，转换区152、散射元件D均通过粘接剂粘接于滤光元件156的表面，粘接剂可以选用光学胶，即滤光元件156的入光侧设置表面有散射元件D及波长转换元件150，散射元件D出射的散射后的补充光入射至滤光元件156。在一种实施方式中，滤光元件156与驱动单 元151连接。滤光元件还可以设置在波长转换区的外围。
如图3B所示，滤光元件156包括第一区段O2、第二区段G2，其中第一区段O2用于对第一区段O1出射的橙色荧光进行滤光，第二区段G2用于对第二区段G1出射的绿色荧光进行滤光。
在本实施方式中，第二区段G2设置有绿色滤光片，第一区段O2出射的橙色荧光包括第一色荧光与第二色荧光，第一区段O2可以对应橙色荧光设置红色滤光片以得到入射至匀光装置180的红色荧光，进而得到自光源系统100出射的红色基色光。在一种实施方式中，第一区段O2设置有用于透射第一色荧光以及部分第二色荧光的滤光片。
如图2所示，经过滤光元件156滤光后出射的受激光以及补充光经过必要的中继系统后入射至匀光装置180，从而实现在空间上的合光。可以理解的是，本发明中的波长转换元件150还可以是固定式的荧光粉片，可以在荧光粉片上设置滤光元件、散射元件以实现相应功能。
光源系统100还可以包括控制装置(图未示)，当波长转换元件150的第一区段O1位于激发光的光路上时，波长转换元件150发出的橙色荧光包括第一色荧光，控制装置控制第二光源120发出第一色激光，并关闭其他补充光光源保证第一色激光与第一色荧光同时入射至匀光装置180，同样地，当第二区段G1位于激发光的光路上时，波长转换元件150发出第二色荧光，控制装置控制第二光源120发出第二色激光。匀光装置180中的第一色荧光与第一色激光为同色异谱光，即第一色荧光与第一色激光属于同一种颜色，均为红色，第一色激光与第一色荧光的光谱曲线不同，第一色激光的光谱曲线带宽较窄，能量较集中，颜色纯度较高，覆盖色域范围较广，第一色荧光光谱曲线带宽较宽，能量较分散，颜色纯度较低，覆盖色域范围较窄。匀光装置180中第一色荧光与第一色激光合光后有利于扩展光源系统100出射第一色光(红基色光)覆盖的色域范围，同理，第二色荧光与第二色激光为同色异谱光，匀光装置180中第二色荧光与第二色激光合光后有利于扩展光源系统100出射第二色光(绿基色光)覆盖的色域范围；激发光与第三色激光为同色异谱光。
如图4所示，匀光装置180的入口181呈方形，入口181处所在的平面包括代表补充光光斑的第一区域p、代表补充光光斑的第二区域q。
在各自对应的显示时段，补充光中的第一色激光、第二色激光、第三色激光在入口181形成的光斑均位于第一区域p的位置处，此时设置补充光具有相同的光路，可以简化光路设计。
需要说明的是，补充光中的第一色激光与第二色激光具有相同的光路指的是剔除第二光源到与其最接近的光学元件这一段光路，因为第一色激光与第二色分别由不同的激光器发出，而一般不同激光器无法放在同一位置。但是，若能将不同颜色的激光器放置在同一个位置，或者将不同颜色的激光器集成在一个器件中，那么第一色激光与第二色激光从第二光源出射到进入匀光装置180均具有相同的光路。当然，设置补充光相同光路部分越多越有利于简化光路设计，但并不排除本领域技术人员为了规避本专利而只设置其中一部分光路相同。
在匀光装置180的入口181处，受激光形成的光斑与第一色激光形成光斑并排排列，受激光形成的光斑位于第二区域q中。
在其他实施方式中，补充光可以不包括第二色激光及/或第三色激光。
匀光装置180入口处既有补充的激光又有同色异谱的受激光时，第一区域p与第二区域q的面积之和小于匀光装置180入口181的面积，从而避免光源进入匀光装置180后产生较大的损失。在一种较佳的实施方式中，设置第一区域p的面积小于第二区域q的面积，有利于降低光源系统100出射荧光的比例，扩展色域。匀光装置180入口处只有激光光斑无受激光光斑时，只要激光光斑小于匀光装置入口的面积即可。第一区域p、第二区域q并排排布，并且不重叠，或者重叠面积小于预设比例，有利于提高光源系统100出射光线的均匀性。可以理解的是，第一区域p、第二区域q之间的相互位置关系及面积大小可以根据光路需要进行调整。
可以理解的是，第一区域p、第二区域q可以根据需要设置为其他形状。
波长转换元件150出射的受激光入射至第二区域q中，激发光激发受激光的效率不变，受激光功率密度基本不变，转换区152仍然具有较高的转换效率效率。
在一种优选的实施方式中，为充分利用匀光装置180的光学扩展量，第一区域p、第二区域q组成区域的外围轮廓与入口181相匹配。本实施方式中的“匹配”是指，外围轮廓与入口181的形状相同或相近，比如均为方形、条形或圆形等等；并且外围轮廓的大小与入口181的大小相同或相近，比如，在一种实施方式中，外围轮廓的面积与入口181的差值小于入口181面积的10％，在一种实施方式中，外围轮廓的面积与入口181的差值小于入口181面积的5％，在一种实施方式中，外围轮廓的面积与入口181的差值小于入口181面积的2％，在一种实施方式中，外围轮廓的面积与入口181等大。
实施例二：
请参阅图5，为本发明第二实施方式中提供的光源系统200的结构示意图。光源系统200与光源系统100的区别主要在于，光源系统200中的第二光源220相较于第二光源120没有第三发光体123，因此补充光中不存在第三色激光。合光元件为透射蓝光反射其他颜色光的二向色片。
实施例三：
请参阅图6-图7，图6为本发明第三实施方式提供的光源系统300的结构示意图，图7为图6所示的波长转换元件350的结构示意图。
光源系统300与光源系统100的主要区别在于，光源系统300中的波长转换元件350中的转换区352反射受激光，转换区352包括第一区段O1与第二区段G1，用于产生第一色荧光与第二色荧光。滤光元件356设置于波长转换元件350的外围并且还用于透射第三色激光，滤光元件356包括第一区段O2与第二区段G2，并且第一区段O2与第二区段G2的外围轮廓尺寸大于转换区352以及散射元件D，散射元件D用于对第一色激光以及第二色激光进行散射。
另外，光源系统300还包括第二合光元件340，第一光源310发出的激发光经过第二合光元件340照射至波长转换元件350，第二合光元件340还引导波长转换元件350出射的受激光照射至第一合光元件330。第二光源320发出的第一色激光与第二色激光穿过散射元件D后入射至第二合光元件340，第二合光元件340还用于引导散射元件D出射的第一色激光与第二色激光入射至第一合光元件330。具体地，激发光为蓝色激光，受激光包括橙色荧光与绿色荧光，第一色激光与第二色激光分别为红色激光与绿色激光，第一合光元件330、第二合光元件340可以为透蓝反黄二向色片。
第一合光元件330用于引导第二合光元件340出射的光线经过滤光元件356入射至匀光装置380的入口381，还用于引导第二光源320发出的第三色激光经过滤光元件356入射至匀光装置380的入口381。其中，入射至第一合光元件330的受激光与补充光的光轴不重叠，第一合光元件330可以根据入射受激光与补充光的光强分布分区域处理不同颜色的光线，有利于降低光线在第一合光元件330表面的损失。
补充光中的第一色激光与第二色激光经过散射元件D在匀光装置380入口381处形成的光斑位于第一区域p；受激光与第一色激光入射至第一合光元件330以及滤光元件356表面的光轴不重合，受激光在匀光装置380入口381处形成的光斑位于第二区域q；补充光中的第三色激光与第一色激光及受激光入射第一合光元件330以及滤光元件356表面的光轴可以重合也可以不重合，即，补充光中的第三色激光在匀光装置380入口381的形成的光斑位置可以与第一区域p相同也可以不同。
在第一时段：控制装置控制第一光源310发出激发光激发转换区352时序地产生第一色荧光与第二色荧光，并根据转换区352中位于激发光光路上的区段来控制第二光源320发出对应颜色的补充光。激发光激发转换区352分时产生第一色荧光、第二色荧光，第一色激光(第二色激光)穿过散射元件D后与第一色荧光(第二色荧光)入射至第一合光元件330、滤光元件356以及匀光装置380的入口381，补充光中的第一色激光、第二色激光分别入射至第一区域p中，受激光 入射至第二区域q。
在第二时段：控制装置控制第二光源320中的第三发光体323出射第三色激光，第一光源310不发光。第三色激光依次经过第一合光元件330、滤光元件356入射至匀光装置380入口381。并且，在第一时段与第二时段中，第一色荧光与第一色激光以及第二色荧光与第二色激光光轴不重合地经第一合光元件330反射至滤光元件356的不同位置后入射至匀光装置380的入口381。
需要说明的是，在第二光源包括三种颜色激光的实施例中，既可以在波长转换元件上设置散射区段，也可以不设置散射区段。设置散射区段时，光源系统出射的蓝基色光由经过散射的蓝激发光和补充的蓝激光合光形成，此时经过散射的蓝激发光与补充的蓝激光在匀光装置入口处的光斑并排排列，以减少合光损失；不设置散射区段时，光源系统出射的蓝基色光由补充的蓝激光提供。
实施例四：
本实施方式中，散射区B1出射的激发光与波长转换元件150出射的受激光沿相同光路入射至入口181，散射区B1出射的激发光同样入射至入口181的第二区域q中。
请参阅图8-图9，图8为本发明第四实施方式提供的光源系统400的结构示意图。光源系统400与光源系统300的主要区别在于，光源系统400的第二光源420中省略了第三发光体，光源系统400出射的第三色光由第一光源410提供，波长转换元件450的转换区452用于透射受激光，波长转换元件450包括用于散射激发光的散射区B1，散射区B1与转换区452交替位于激发光的光路上。补充光、转换区452出射的受激光以及散射区B1出射的激发光经过散射元件D、第一合光元件430、滤光元件456后入射至匀光装置480的入口481。第一合光元件430一部分透射激发光一部分反射受激光及经过散射的激发光。
激发光与第一色激光、第二色激光的光路可以相同也可以不同。第一色激光与第一色荧光、第二色激光与第二色荧光在第二合光元件 431上形成的光斑并排排列。
第一光源410与第二光源420分别设置于波长转换元件450的两侧，第一光源410发出的激发光照射至转换区452或者散射区B 1的入光侧，转换区452与散射区B1(图9)的出光侧分别出射受激光与散射后的激发光至散射元件D的引导元件，比如反射镜、二向色分光片等等。第二光源420发出的补充光、散射后的激发光以及受激光经过散射元件D、第一合光元件430、滤光元件456后入射至匀光装置480。
实施例五：
请参阅图10-图11，图10为本发明第五实施方式提供的光源系统500的结构示意图，图11为图10所示的波长转换元件550的结构示意图。光源系统500与光源系统100相比，主要区别在于，波长转换元件550反射受激光。滤光元件556设置于波长转换元件550的外围，即滤光元件556的尺寸大于波长转换元件550。补充光以及转换区552出射的受激光以并排排列的光斑入射至第一合光元件530以及滤光元件556的不同位置，滤光元件556出射的光线进入匀光装置580的入口581。
具体地，第一色荧光与第一色激光入射至第一合光元件530以及滤光元件556表面的光斑并排排列，第二色荧光与第二色激光入射至第一合光元件530以及滤光元件556表面的光斑并排排列。
需要说明的是，在本发明的精神或基本特征的范围内，各个实施方式中的各具体方案也可以相互适用，为节省篇幅及避免重复起见，在此就不再赘述。

Claims (10)

  1. 一种光源系统，其特征在于，包括：
    第一光源，用于发出激发光；
    第二光源，用于发出激光作为补充光；
    波长转换元件，包括转换区，所述转换区用于对所述第一光源出射的激发光进行波长转换以得到受激光；所述波长转换元件出射的受激光与第二光源出射的补充光在匀光装置入口处并排排列。
  2. 如权利要求1所述的光源系统，其特征在于，还包括散射元件；所述散射元件设置在所述补充光的出光光路上，用于对所述补充光散射；所述波长转换元件与所述散射元件均呈圆环形，所述散射元件空间上设于所述波长转换元件的环内侧或环外侧。
  3. 如权利要求2所述的光源系统，其特征在于，
    所述补充光包括第一色激光或者第一色激光与第二色激光，所述波长转换元件的转换区包括第一区段或者第一区段与第二区段；
    所述转换区的第一区段用于产生作为受激光的第一色荧光，第二区段用于产生作为受激光的第二色荧光，所述第一色激光与所述第一色荧光为同色异谱光，所述第二色激光与所述第二色荧光为同色异谱光；
    所述第一色激光的光斑与所述第一色荧光的光斑在匀光装置入口处并排排列；所述第二色激光的光斑与所述第二色荧光的光斑在匀光装置入口处并排排列。
  4. 如权利要求3所述的光源系统，其特征在于，所述第一色激光与所述第二色激光具有相同的光路。
  5. 如权利要求3或4所述的光源系统，其特征在于，波长转换元件还包括散射区，所述散射区与所述转换区时序位于所述激发光的出光光路上，所述散射区用于对所述激发光散射形成用于显示的基色光。
  6. 如权利要求3所述的光源系统，其特征在于，所述补充光还包括第三色激光，所述第三色激光与所述激发光为同色异谱光；
    所述光源系统还包括合光元件，所述合光元件设置在所述激发光 与所述第三色激光的出光光路上；
    所述合光元件包括第一部分与第二部分，所述第一部分用于反射或者透射所述激发光，所述第二部分用于透射或者反射所述第三色激光。
  7. 如权利要求3所述的光源系统，其特征在于，所述受激光与所述补充光的光斑在所述匀光装置入口处的面积之和小于所述匀光装置入口的面积。
  8. 如权利要求7所述的光源系统，其特征在于，所述受激光的光斑在所述匀光装置入口处的面积小于所述补充光在所述匀光装置入口的面积。
  9. 如权利要求1所述的光源系统，其特征在于，所述光源系统还包括与所述转换区各个区段相对应的滤光元件，用于对所述转换区出射的受激光进行滤光。
  10. 一种投影设备，其特征在于，包括如权利要求1-9任意一项所述的光源系统。
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