WO2020135302A1 - Système de source de lumière et dispositif de projection - Google Patents

Système de source de lumière et dispositif de projection 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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PCT/CN2019/127282
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English (en)
Chinese (zh)
Inventor
胡飞
孙微
郭祖强
李屹
Original Assignee
深圳光峰科技股份有限公司
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Publication of WO2020135302A1 publication Critical patent/WO2020135302A1/fr

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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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un système de source de lumière (100) et un dispositif de projection. Le système de source de lumière (100) comprend : une première source de lumière (110) servant à émettre une lumière d'excitation ; une seconde source de lumière (120) servant à émettre une lumière laser en tant que lumière supplémentaire ; et un élément de conversion de longueur d'onde (150) comprenant une zone de conversion (152), la zone de conversion (152) servant à effectuer une conversion de longueur d'onde sur la lumière d'excitation émise par la première source de lumière (110) de façon à obtenir une lumière excitée. La lumière excitée émise par l'élément de conversion de longueur d'onde (150) et la lumière supplémentaire émise par la seconde source de lumière (120) sont disposées côte à côte au niveau d'une entrée d'un appareil d'homogénéisation de lumière (180), ce qui permet de réduire la perte de lumière excitée et d'améliorer l'efficacité d'éclairage lorsque la lumière excitée est combinée à la lumière supplémentaire.
PCT/CN2019/127282 2018-12-29 2019-12-23 Système de source de lumière et dispositif de projection WO2020135302A1 (fr)

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