CN107272312A - Light-emitting device and relevant projecting system and illuminator - Google Patents
Light-emitting device and relevant projecting system and illuminator Download PDFInfo
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- CN107272312A CN107272312A CN201610211205.3A CN201610211205A CN107272312A CN 107272312 A CN107272312 A CN 107272312A CN 201610211205 A CN201610211205 A CN 201610211205A CN 107272312 A CN107272312 A CN 107272312A
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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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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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
- G03B21/208—Homogenising, shaping of the illumination light
Abstract
The embodiment of the invention discloses a kind of light-emitting device and relevant projecting system and illuminator, the light-emitting device includes：First light source, for the light of outgoing first；Secondary light source, for the light of outgoing second, the first light and the second light at least one be exciting light；Light-dividing device, the closing light for receiving the first light and the second light, and in different Transflective ratios, the first light and the second light are guided from the first light path and the second light path outgoing；First wave length conversion equipment, is the first Stimulated Light for receiving the first light and the second light from the first light path outgoing, and by least part wavelength convert of the light；Scattering device, for that will be scattered light from the first light of the second light path outgoing and the second light scattering, scattered light outgoing together with the first Stimulated Light be the emergent light of light-emitting device.In the embodiment of the present invention, light-emitting device has the advantages that the color of emergent light or colour temperature can change.
Description
Technical field
The present invention relates to illumination and display technology field, more particularly to a kind of light-emitting device and relevant projecting system and illuminator.
Background technology
At present, LASER Excited Fluorescence powder is widely used to illumination and display technology field with the technology of ejecting white light.
Fig. 1 is the structural representation of typical white light emitting device in the prior art.As shown in figure 1, light-emitting device includes laser 101, collimation lens 102, speculum 103, optical filter 104, collecting lens 105, Wavelength converter 106.Laser 101 is blue-light semiconductor laser particle, after the collimated lens 102 of exciting light exported from semiconductor laser 101 are collimated, is changed into the less directional light of light beam.Successively reflected mirror 103 and optical filter 104 reflect directional light, then are assembled through collecting lens 105, incide on Wavelength converter 106.Wavelength converter 106 is yellow fluorescence bisque, and it absorbs incident blue excitation light and is partially converted to yellow Stimulated Light outgoing, and the blue light do not changed and the gold-tinted for being excited to produce are mixed to form white light output.White light forms the directional light of angle pencil of ray after being collimated through collecting lens 105, because optical filter 104 transmits Stimulated Light reflected excitation light, so some blue light can be kept off, but because its size is much smaller than the beam diameter of collecting lens outgoing directional light, so the blue light of the Stimulated Light of collecting lens outgoing and the overwhelming majority still can be exported, thus final light-emitting device can obtain white light output.
But, once because the optical system of light-emitting device determines that the ratio for finally exporting exciting light and Stimulated Light in white light also determines that colour temperature and color can not change again.Although adjusting the concentration of fluorescent material in Wavelength converter 106, the white light of different colour temperatures can be obtained, because phosphor concentration is difficult to accurate control, process consistency is also difficult to ensure.
The content of the invention
The present invention solves the technical problem of provide light-emitting device and relevant projecting system and the illuminator that a kind of color can change.
The embodiment of the present invention provides a kind of light-emitting device, the first light source, for the light of outgoing first；Secondary light source, for the light of outgoing second, the first light and the second light at least one be exciting light；Light-dividing device, the closing light for receiving the first light and the second light, and in different Transflective ratios, the first light and the second light are guided from the first light path and the second light path outgoing；First wave length conversion equipment, is the first Stimulated Light for receiving the first light and the second light from the first light path outgoing, and by least part wavelength convert of the light；Scattering device, for that will be scattered light from the first light of the second light path outgoing and the second light scattering, scattered light outgoing together with the first Stimulated Light be the emergent light of light-emitting device.
Preferably, first wave length conversion equipment be additionally operable to reflect its emergent light to light-dividing device, scattering device is additionally operable to specular scattering light to light-dividing device, light-dividing device be additionally operable to by the emergent light with scattering actinic light and outgoing be light-emitting device emergent light.
Preferably, in the second smooth two-way light that the first light that the first light source is sent and secondary light source are sent, light-dividing device at least guide all the way light be more than 0 and less than 0.5 from the ratio of the second light path outgoing.
Preferably, the first light and the second light that light-dividing device is received are respectively P polarization light and S-polarization light, and light-dividing device has different Transflective ratios to P polarization light and S-polarization light.
Preferably, light-emitting device also includes polarization Multiplexing apparatus, for the first light source and secondary light source to be distinguished to the first light of outgoing and second photosynthetic for light beam, and outgoing is to light-dividing device.
Preferably, the light-emitting device also includes the 3rd light source of the light of outgoing the 3rd, the 3rd light and the first light, the second actinic light and incident light-dividing device, and light-dividing device is additionally operable to the 3rd light of guiding to first wave length conversion equipment and/or scattering device.
Preferably, scattering device includes material for transformation of wave length, and it is Stimulated Light that the material for transformation of wave length, which is used for the first light and/or the second light wavelength conversion,.
Preferably, light-emitting device also includes drive circuit, driving current or voltage for adjusting the first light source and at least one light source in secondary light source.
The embodiment of the present invention also provides a kind of optical projection system, and the optical projection system includes above-mentioned light-emitting device.
The embodiment of the present invention also provides a kind of illuminator, and the illuminator includes above-mentioned light-emitting device.
Compared with prior art, the present invention includes following beneficial effect：
In the embodiment of the present invention, light-dividing device is reflected the first light and the equal fractional transmission part of the second light, because light-dividing device is different to the Transflective ratio of the first light, the second light, therefore, can be by the luminous power of the emergent light for changing the first light source and/or secondary light source, to change light-dividing device from the first light path and the emergent light ratio of the second light path, and then the first Stimulated Light and the ratio of scattered light in light-emitting device emergent light are adjusted, so as to change the color or colour temperature of emergent light.
Brief description of the drawings
The structural representation of Fig. 1 typical white light emitting devices in the prior art；
Fig. 2 a are the structural representations of one embodiment of light-emitting device in the embodiment of the present invention；
Fig. 2 b are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident P polarization light and S-polarization light；
Fig. 2 c are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident different wavelengths of light；
Fig. 3 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；
Fig. 4 a are the structural representations of another embodiment of light-emitting device in the embodiment of the present invention；
Fig. 4 b are Fig. 4 a illustrated embodiment neutralizing light devices 409b structural representations；
Fig. 5 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.
Embodiment
For the sake of quoting and understanding, the technical term that hereafter and in accompanying drawing uses is described as follows：
Material for transformation of wave length：Material for transformation of wave length can use phosphorescent material, and such as phosphor, it would however also be possible to employ nano material, such as quantum dot can also use fluorescent material.
Exciting light：Being capable of excitation wavelength transition material so that material for transformation of wave length produces the light of different wavelengths of light.
Stimulated Light：The light that material for transformation of wave length stimulated luminescence is excited and produced.
Exciting light, material for transformation of wave length, Stimulated Light are relative concepts.For example, blue light excites yellow fluorescent powder to produce gold-tinted, now blue light is exciting light, and gold-tinted is Stimulated Light.And gold-tinted excitated red fluorescent powder produces feux rouges, now gold-tinted is exciting light, and feux rouges is Stimulated Light.
The embodiment of the present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Embodiment one
Fig. 2 a are referred to, Fig. 2 a are the structural representations of one embodiment of light-emitting device in the embodiment of the present invention.As shown in Figure 2 a, light-emitting device 200 includes the first light source 201, secondary light source 202, light-dividing device 203, first wave length conversion equipment 204, scattering device 205.
First light source 201 is used for the light of outgoing first, and secondary light source 202 is used for the light of outgoing second, and the first light and the second light are exciting light（For example it is blue light）.Light-dividing device 203 is used for the closing light for receiving the first light and the second light, and in different Transflective ratios, guides the first light and the second light from the first light path and the second light path outgoing.For example, light-dividing device is to the first light transmission 20% reflection 80%, to the second light transmission 10% reflection 90%.First wave length conversion equipment 204 is used to receive the first light and the second light from the first light path outgoing, and is the first Stimulated Light by first light and the second light wavelength conversion（Such as yellow fluorescent powder is excited the gold-tinted produced）.Scattering device 205 is used to be scattered light from the first light of the second light path outgoing and the second light scattering.Also, first wave length conversion equipment 204 is additionally operable to reflect the first Stimulated Light that it produces to light-dividing device 203, scattering device 205 is additionally operable to reflect scattered light that it produces to light-dividing device 203；Light-dividing device 203 is additionally operable to transmit first Stimulated Light and the reflecting part scattered light, by the emergent light that first Stimulated Light and scattering actinic light and outgoing are light-emitting device（Band arrow is shown in solid in figure）.
In the embodiment of the present invention, light-dividing device is reflected the first light and the equal fractional transmission part of the second light, because light-dividing device is different to the Transflective ratio of the first light, the second light, therefore, it can the luminous power of the emergent light by changing the first light source and/or secondary light source（For example by way of the driving current or voltage that change light source）, to change light-dividing device from the first light path and the emergent light ratio of the second light path, and then the first Stimulated Light and the ratio of scattered light in light-emitting device emergent light are adjusted, so as to change the color or colour temperature of emergent light.
Concrete analysis is as follows：Assuming that the luminous power of the first light and the second light is respectively p and q, the transmissivity of 203 pair of first light of light-dividing device is a, reflectivity is 1-a, light-dividing device is b to the transmissivity of the second light, reflectivity is 1-b, light-dividing device 203 from the first light of the first light path outgoing and the luminous power of the second light be x, light-dividing device 203 from the first light of the second light path outgoing and the luminous power of the second light be y, then x=p (1-a)+q (1-b), y=pa+qb.Because light-dividing device is different to the Transflective ratio of the first light, the second light, i.e. a ≠ b, so changing p and/or q, can change y/x, and then adjust the first Stimulated Light and the ratio of scattered light in light-emitting device emergent light, so as to change the color or colour temperature of emergent light.Also, color or colour temperature are adjusted by way of adjusting driving current or driving voltage, not only fast and easy, and it is more accurate.
In the present embodiment, first light source 201 is wavelength identical blue laser with secondary light source 202, and laser 201 and 202 is positioned orthogonally with respect to each, the first light is P polarization light relative to the plane of incidence of light-dividing device 203, and the second light is S-polarization light relative to the plane of incidence of light-dividing device 203.Light-emitting device also includes two collimation lenses 206 being arranged side by side, is changed into collimating directional light by the exciting light of two blue lasers outputs, and two hot spots side by side and in close proximity to and be combined into a large spot, output to light-dividing device 203.
In the present embodiment, the incident P polarization light of 203 pairs of light-dividing device realizes fractional transmission and reflection, and fractional transmission and reflection are also realized to incident S-polarization light, but different to the Transflective ratio of both polarised lights.For example, referring to Fig. 2 b, Fig. 2 b are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident P polarization light and S-polarization light.In Fig. 2 b, abscissa is wavelength, and ordinate is transmissivity, and the solid line curve of spectrum is the curve of spectrum to P polarization light, and the dotted line curve of spectrum is the curve of spectrum to S-polarization light.As can be seen that for wave-length coverage in 440nm-460nm blue light, light-dividing device is 30% or so to the transmissivity of incident P polarization light, and reflectivity is 70% or so from Fig. 2 b, the transmissivity to incident S-polarization light is 10% or so, and reflectivity is 90% or so.
The reflected light of light-dividing device 203 is directed to the first light path, and incides first wave length conversion equipment 204 after the convergence of collecting lens group 207.First wave length conversion equipment 204 is specially yellow fluorescent powder, and the blue laser from the first light path is changed into yellowly Stimulated Light, and the yellow Stimulated Light is reflected by first wave length conversion equipment 204 and through collecting lens group 207 to light-dividing device 203.The transmitted light of light-dividing device 203 is directed to the second light path, and is incided after the convergence of collecting lens group 208 on scattering device 205.205 pairs of incident blue lasers of scattering device are scattered, and the scattered light is reflected by scattering device 205 and through collecting lens group 208 to light-dividing device 203.It is understood that lens 206, lens group 207 can also be substituted with lens group 208 using other light collecting devices.
The yellow Stimulated Light of the output of the transmission first wave length of light-dividing device 203 conversion equipment 204, the blue scattered light in part that reflective scattering device 205 is exported, beam of white light is mixed into by the blue scattered light and yellow Stimulated Light, and outgoing is the emergent light of light-emitting device.The driving current of at least one laser in two blue lasers can be adjusted by drive circuit, distinguish the p-polarization light of outgoing and the luminous power of s polarised lights to adjust two lasers, so as to adjust light-dividing device from the first light path and the outgoing blue light ratio of the second light path, and then yellow Stimulated Light and the ratio of blue scattered light in light-emitting device emergent light are adjusted, so as to change the color or colour temperature of ejecting white light.In this specific embodiment, the natural quality that can be separated to the plated film curve of p-polarization light and s polarised lights using light-dividing device, to realize Transflective ratio that light-dividing device is different from the second light to the first light, so as to which not only the p-polarization light of outgoing and the luminous power of s polarised lights can be distinguished by adjusting two lasers, finally the color or colour temperature of emergent light are changed, and also avoid the strict control to light-dividing device coating process.
Light-dividing device guides part exciting light to scattering device from the second light path, and this part exciting light proportion is smaller, and the ratio that light source can be returned when that is reflected back light-dividing device by scattering device is just smaller, otherwise bigger.Therefore, the loss that light source is caused is returned in order to reduce scattered light, preferably, in the second smooth two-way light that the first light that the first light source is sent and secondary light source are sent, light-dividing device at least guides light to be all the way more than 0 and less than 0.5 from the ratio of the second light path outgoing, i.e., the ratio that light-dividing device guides the first light to account for the first light from the light of the second light path outgoing is more than 0 and less than 0.5；Or/and, the ratio that the light-dividing device guides the second light to account for the second light from the light of the second light path outgoing is more than 0 and less than 0.5.For example, in the present embodiment, the transmissivity of the incident P polarization light of 203 pairs of light-dividing device is more than 0 and less than 50%, to the transmissivity of incident S-polarization light also greater than 0 and less than 50%.
In the present embodiment, light-dividing device 203 specifically uses polarization spectro, in other embodiments, it would however also be possible to employ wavelength light splitting.Specifically, the first light that the first light source 201 and secondary light source 202 are exported is identical with the polarization characteristic of the second light, but wavelength is different；Now the exciting light of 203 pairs of two kinds of different wave lengths of light-dividing device has different Transflective ratios.For example, referring to Fig. 2 c, Fig. 2 c are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident different wavelengths of light.In Fig. 2 c, abscissa is wavelength, and ordinate is transmissivity.As can be seen that light-dividing device is different from the transmissivity of wavelength b2 light to wavelength b1 from Fig. 2 c.Now, the driving current that drive circuit adjusts two lasers is again may be by, to adjust the ratio of the exciting light of first light path and the second light path after the light splitting of light-dividing device 203, and then the color or colour temperature of last output light is adjusted.In this specific embodiment, it is different to transmitance/reflectivity Characteristics of different wavelengths of light by designing light-dividing device, to realize Transflective ratio that light-dividing device is different from the second light to the first light, so that not only can be by adjusting the luminous power that two lasers distinguish two kinds of wavelength lights of outgoing, finally the color or colour temperature of emergent light are changed, and also avoid the strict control to light-dividing device coating process.
When light-dividing device 203 is using wavelength light splitting, the first light source 201 can also use LED with secondary light source 202.Certainly, when light-dividing device 203 is using polarization spectro, the first light source 201 can also use LED with secondary light source 202, but because LED emergent lights are non-polarized light, therefore polarizer need to be set before light-dividing device, for the non-polarized light of two LED outgoing to be respectively become into P polarization light and S-polarization light.
In the present embodiment, first wave length conversion equipment is reflective, can include reflective with setting wavelength conversion sheet on reflective substrates（Such as yellow fluorescent powder piece）, the Stimulated Light that wavelength conversion sheet is produced reflexes to lens group by reflective.In the present embodiment, material for transformation of wave length absorbs all exciting lights, part exciting light can also be only absorbed in other embodiments, now first wave length conversion equipment is by its emergent light, that is the mixed light of the first Stimulated Light and the exciting light do not changed reflexes to light-dividing device, and light-dividing device transmits the first Stimulated Light and the partly exciting light do not changed.
In the present embodiment, the first light and the second light specifically are used for blue light, and blue scattered light is mixed into the example of white light to illustrate how the present invention changes emergent light color with yellow Stimulated Light.In other embodiments, it would however also be possible to employ the example of other colors.For example, the first light and the second light are green light, cyan scattered light is mixed into white light with red Stimulated Light；Or, the first light and the second light are blue light, and blue excitation light is mixed into purple light with red Stimulated Light；Or, the first light and the second light are respectively blue light and green light, and blue cyan scattered light is mixed into white light etc. with yellow Stimulated Light, as long as the first light and the second light can excite first wave length conversion equipment to produce the first Stimulated Light.
But do not limit the first light actually and the second light be exciting light, the first light and the second light can also only one of which be exciting light, now Wavelength converter absorbs exciting light therein, and another light is scattered.Such as the first light and the second light are respectively blue light and feux rouges, blue light is together with feux rouges after incident yellow fluorescent powder, yellow fluorescent powder absorbs some blue light and produces gold-tinted, and feux rouges is scattered, therefore the feux rouges after yellow fluorescent powder outgoing gold-tinted, unabsorbed blue light and scattering.
In addition, in other embodiments, Wavelength converter can use LED as substrate, material for transformation of wave length（Such as fluorescent material）It is arranged on modes such as coating or pad pastings in LED light-emitting area.For example, when use blue led as Wavelength converter substrate when, the one side of material for transformation of wave length is excited by the laser from the first lens, and another side is excited by the blue led, i.e. material for transformation of wave length is two-sided is excited simultaneously, thus can improve the outgoing brightness of light-emitting device.For another example, when use red LED as Wavelength converter substrate when, although material for transformation of wave length will not be excited by the red LED, but the feux rouges of red LED outgoing can with material for transformation of wave length produce Stimulated Light together with outgoing, so as to increase the energy of red-light spectrum for light-emitting device, the not enough defect of the red energy of Stimulated Light compensate for；Now light-dividing device is preferably the light splitting optical filter of reflected excitation light and transmission Stimulated Light and feux rouges.
Due to setting the technics comparing of material for transformation of wave length complicated on LED, therefore for the not enough defect of the red energy for making up Stimulated Light, light-emitting device can also include the 3rd light source of the light of outgoing the 3rd, 3rd light and the first light, the second actinic light and incident light-dividing device, light-dividing device is additionally operable to the 3rd light of guiding to Wavelength converter and/or scattering device so that Wavelength converter and/or scattering device can also the light of outgoing the 3rd.3rd light source can be red laser or green laser, so as to increase the energy of red-light spectrum or green spectrum for light-emitting device.3rd light source can also be infrared laser, can so increase the energy of infrared spectrum for light-emitting device, in order to which user can have found the light-emitting device at night by infrared detector.
In addition, scattering device 205 is in addition to including scattering material, a small amount of material for transformation of wave length can also be included, first light and the second light are incident to after scattering device 205, it is Stimulated Light that the material for transformation of wave length, which is used for the first light and/or the second light wavelength conversion, to enable the light-emitting device outgoing Stimulated Light.For example there is a small amount of red fluorescence powder on scattering device, the energy of red-light spectrum can be increased for light-emitting device.
In other embodiments, first wave length conversion equipment 204 can be exchanged with the position of scattering device 205, i.e. the reflected light of light-dividing device is incident to scattering device, and the transmitted light of light-dividing device is incident to first wave length conversion equipment；And the Stimulated Light that light-dividing device reflection first wave length conversion equipment is produced, and transmit some scattered light of scattering device outgoing.
Also, in other embodiments, scattering device 205 can also be by another Wavelength converter（Referred to herein as second wave length conversion equipment）To substitute.Now, the outgoing together with the second Stimulated Light of second wave length conversion equipment outgoing of the first Stimulated Light of the outgoing of first wave length conversion equipment 204 is the emergent light of light-emitting device.For example, the first light and the second light can specifically be used for blue light, first wave length conversion equipment includes red fluorescence powder and green emitting phosphor respectively with second wave length conversion equipment, the gold-tinted that light-emitting device outgoing is mixed by red Stimulated Light with green Stimulated Light, or outgoing is by the white light of red Stimulated Light and green Stimulated Light and the blue light for not being wavelength-converted device conversion.The driving current that drive circuit adjusts two light sources is again may be by herein, to adjust the ratio of the exciting light of first light path and the second light path after the light splitting of light-dividing device 203, and then the ratio of the first Stimulated Light and the second Stimulated Light in light-emitting device emergent light is adjusted, so as to change the color or colour temperature of emergent light.
Embodiment two
Referring to Fig. 3, Fig. 3 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 3, light-emitting device 300 includes the first light source 301, secondary light source 302, light-dividing device 303, first wave length conversion equipment 304, scattering device 305, lens 306, lens group 307 and lens group 308.
The present embodiment and the difference of Fig. 2 a illustrated embodiments include：
The present embodiment also includes speculum 309a and polarization Multiplexing apparatus 309b, and polarization Multiplexing apparatus has the attribute of transmitting P-type polarisation light reflection S-polarization light.The reflected mirror 309a of P polarization light of the outgoing of laser 301 reflexes to polarization Multiplexing apparatus 309b, the S-polarization light of the outgoing of laser 302 is incident to polarization Multiplexing apparatus 309b, polarize Multiplexing apparatus 309b by P polarization light and S-polarization it is photosynthetic be light beam, and shine on light-dividing device 303.Relative to Fig. 2 a illustrated embodiments, in the present embodiment, before incident light-dividing device 303, the P polarization light that the first light source 301 and secondary light source 302 are distinguished into outgoing by polarizing Multiplexing apparatus 309b photosynthetic with S-polarization is light beam, and outgoing is to light-dividing device 303, emergent light can be caused to have hot spot smaller, the higher advantage of brightness.
Can also be first light beam by the photosynthetic of the first light source 301 and the outgoing of secondary light source 302 by wavelength Multiplexing apparatus before incident light-dividing device 303 it is understood that in the embodiment using wavelength light splitting, and outgoing is to light-dividing device.Now the first light has different first wave length and second wave length respectively from the second light, and Multiplexing apparatus 309 reflects the wavelength Multiplexing apparatus of second wave length for transmission first wave length.
In the present embodiment, Multiplexing apparatus 309b reflects the second light come closing light by transmiting the first light；In other embodiments, Multiplexing apparatus 309b can also reflect the first light come closing light by transmiting the second light.In addition, speculum 309a is dispensed, the first light of the now outgoing of the first light source 301 directly incidence Multiplexing apparatus 309a after lens 306.
Embodiment three
The structural representation that Fig. 4 a and Fig. 4 b, Fig. 4 a is another embodiment of light-emitting device in the embodiment of the present invention is referred to, Fig. 4 b are Fig. 4 a illustrated embodiment neutralizing light devices 409b structural representations.As shown in fig. 4 a, light-emitting device 400 includes the first light source 401, secondary light source 402, light-dividing device 403, first wave length conversion equipment 404, scattering device 405, lens 406, lens group 407, lens group 408, speculum 409a, Multiplexing apparatus 409b.
The difference of the present embodiment and embodiment illustrated in fig. 3 is：
Secondary light source 402 is LED, and its emergent light is in lambertian distribution.As shown in Fig. 4 a and Fig. 4 b, Multiplexing apparatus 409 is to include through hole 419b speculum, first light of the outgoing of laser 401 passes through through hole 419b, second light of LED402 outgoing is reflected by the region beyond the through hole 419b of speculum, so as to which the first light and the second light are combined into light beam by Multiplexing apparatus 409, and outgoing is to light-dividing device 403.Also, the first light of the first light source outgoing is different from the wavelength of the second light of secondary light source outgoing, the Transflective ratio of the light of 403 pairs of two kinds of different wave lengths of light-dividing device is different, that is, carries out wavelength light splitting.
Reason same as the previously described embodiments, because the Transflective ratio of 403 pair of first light of light-dividing device, the second light is different, it therefore, it can the luminous power of the emergent light by changing the first light source and/or secondary light source, to change the color or colour temperature of light-emitting device emergent light.Further, the present embodiment uses speculum 409b with holes, using the difference of laser and LED etendue carries out closing light, it is to avoid use wavelength or polarizing filter.
It is appreciated that, laser 401 can also be exchanged with LED402 position, now Multiplexing apparatus 409b, which is replaced with, includes small reflector plate 419b clear glass, the laser light incident of laser emitting is to small reflector plate and is reflected onto light-dividing device 403, the region beyond the small reflector of the light transmission Multiplexing apparatus of LED outgoing to light-dividing device.
For ease of summarizing, herein, the speculum with through hole and the clear glass with small reflector plate are referred to as propagation Multiplexing apparatus, above-mentioned through hole and small reflector are referred to as to the first area of propagation Multiplexing apparatus, above-mentioned through hole（Or small reflector）Region in addition is referred to as the second area of propagation Multiplexing apparatus, and four times of area more than the area of first area of second area, and first area is respectively used to receive the first light source and the light of secondary light source outgoing with second area.The light of first light source outgoing is transmitted by first area, and the light of secondary light source outgoing is reflected by second area；Or, the light of the first light source outgoing is reflected by first area, and the light of secondary light source outgoing is transmitted by second area, so that the first light source is light beam with the photosynthetic of secondary light source outgoing.
In addition, corresponding to propagation Multiplexing apparatus, in other embodiments, light-dividing device 403 can be divided into the 3rd region and the 4th region, include the 3rd region corresponding to first area, first light of the outgoing of propagation Multiplexing apparatus 409 is incident to the 3rd region, and the second light of the outgoing of propagation Multiplexing apparatus 409 is incident to the region beyond the 3rd region of light-dividing device（Hereinafter referred to as the 4th region）.Also, the 3rd region is different to the Transflective ratio of the second light from the 4th region to the Transflective ratio of the first light, such as the 3rd region is to the first light transmission 20% reflection 80%, and the 4th region is to the second light transmission 10% reflection 90%.
Similarly, this subregion of light-dividing device is set, and can also be applied to Fig. 2 a illustrated embodiments.
Example IV
In the various embodiments described above, with reflective first wave length conversion equipment and scattering device（Or second wave length conversion equipment）To illustrate.In fact, first wave length conversion equipment and scattering device（Or second wave length conversion equipment）Also transmission-type can be used, optical module is used in their subsequent optical path by the first Stimulated Light and scattered light（Or second Stimulated Light）Carry out closing light.For example, referring to Fig. 5, Fig. 5 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.
As shown in figure 5, light-emitting device 500 includes the first light source 501, secondary light source 502, light-dividing device 503, first wave length conversion equipment 504, scattering device 505, lens 506, lens group 507, lens 508a.
The present embodiment in place of the difference of Fig. 2 a illustrated embodiments with including：
The present embodiment also includes lens 508b, speculum 510, speculum 511 and optical filter 512, scattering device 505 is transmission-type, lens 508b is used for the scattered light for collecting the transmission of scattering device 505, the scattered light is reflexed to optical filter 512 by speculum 510, speculum 511, optical filter 512 transmits the Stimulated Light from light-dividing device 503, and reflected light of the reflection from speculum 511, so that Stimulated Light and scattered light are combined into a branch of emergent light.
The embodiment of each in this specification is described by the way of progressive, what each embodiment was stressed be between the difference with other embodiment, each embodiment identical similar portion mutually referring to.
The embodiment of the present invention also provides a kind of optical projection system, including light-emitting device, and the light-emitting device can have structure and function in the various embodiments described above.The optical projection system can use various shadow casting techniques, such as liquid crystal display（LCD, Liquid Crystal Display）Shadow casting technique, digital light processor（DLP, Digital Light Processor）Shadow casting technique.For example, the light-emitting device of above-mentioned ejecting white light can as optical projection system white light source.
The embodiment of the present invention also provides a kind of illuminator, including light-emitting device, and the light-emitting device can have structure and function in the various embodiments described above.For example, above-mentioned light-emitting device can apply to torch for illumination, auto lamp illumination, stage lighting illumination etc..
It the foregoing is only embodiments of the present invention; it is not intended to limit the scope of the invention; equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made; or other related technical fields are directly or indirectly used in, it is included within the scope of the present invention.
Claims (10)
1. a kind of light-emitting device, it is characterised in that including：
First light source, for the light of outgoing first；
Secondary light source, for the light of outgoing second, the first light and the second light at least one be exciting light；
Light-dividing device, the closing light for receiving first light and the second light, and in different Transflective ratios, the first light and the second light are guided from the first light path and the second light path outgoing；
First wave length conversion equipment, is the first Stimulated Light for receiving first light and the second light from the first light path outgoing, and by least part wavelength convert of the light；
Scattering device, for being scattered light by first light from the second light path outgoing and the second light scattering, scattered light outgoing together with the first Stimulated Light is the emergent light of the light-emitting device.
2. light-emitting device according to claim 1, it is characterised in that：The first wave length conversion equipment is additionally operable to reflect its emergent light to the light-dividing device, the scattering device is additionally operable to reflect the scattered light to the light-dividing device, the light-dividing device be additionally operable to by the emergent light with scattering actinic light and outgoing be the light-emitting device emergent light.
3. light-emitting device according to claim 1, it is characterised in that：In the second smooth two-way light that the first light that the first light source is sent and secondary light source are sent, the light-dividing device at least guide all the way light be more than 0 and less than 0.5 from the ratio of the second light path outgoing.
4. light-emitting device according to claim 1, it is characterised in that：The first light and the second light that the light-dividing device is received are respectively P polarization light and S-polarization light, and the light-dividing device has different Transflective ratios to P polarization light and S-polarization light.
5. light-emitting device according to claim 4, it is characterised in that：The light-emitting device also includes polarization Multiplexing apparatus, for the first light source and secondary light source to be distinguished to the first light of outgoing and second photosynthetic for light beam, and outgoing is to the light-dividing device.
6. light-emitting device according to claim 1, it is characterised in that：The light-emitting device also includes the 3rd light source of the light of outgoing the 3rd, the 3rd light and the first light, the second actinic light and the incident light-dividing device, and the light-dividing device is additionally operable to the 3rd light of guiding to first wave length conversion equipment and/or the scattering device.
7. light-emitting device according to claim 1, it is characterised in that：The scattering device includes material for transformation of wave length, and it is Stimulated Light that the material for transformation of wave length, which is used for the first light and/or the second light wavelength conversion,.
8. light-emitting device according to any one of claim 1 to 7, it is characterised in that：The light-emitting device also includes drive circuit, driving current or voltage for adjusting the first light source and at least one light source in secondary light source.
9. a kind of optical projection system, the optical projection system includes the light-emitting device as any one of claim 1 to 8.
10. a kind of illuminator, the illuminator includes the light-emitting device as any one of claim 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610211205.3A CN107272312A (en) | 2016-04-06 | 2016-04-06 | Light-emitting device and relevant projecting system and illuminator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610211205.3A CN107272312A (en) | 2016-04-06 | 2016-04-06 | Light-emitting device and relevant projecting system and illuminator |
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| CN107272312A true CN107272312A (en) | 2017-10-20 |
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| CN201610211205.3A Pending CN107272312A (en) | 2016-04-06 | 2016-04-06 | Light-emitting device and relevant projecting system and illuminator |
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| CN111413841B (en) * | 2019-01-04 | 2023-08-11 | 深圳光峰科技股份有限公司 | Wavelength conversion device, light source system and display device |
| CN110347009A (en) * | 2019-06-13 | 2019-10-18 | 广州光联电子科技有限公司 | A kind of optical system of laser light source |
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