CN1847898A - High efficient light coupling of solid-state light source device and application method thereof - Google Patents
High efficient light coupling of solid-state light source device and application method thereof Download PDFInfo
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- CN1847898A CN1847898A CNA2006100742401A CN200610074240A CN1847898A CN 1847898 A CN1847898 A CN 1847898A CN A2006100742401 A CNA2006100742401 A CN A2006100742401A CN 200610074240 A CN200610074240 A CN 200610074240A CN 1847898 A CN1847898 A CN 1847898A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
Abstract
The invention discloses high-brightness solid luminous source device of high-effective coupling, which contains one or more solid launching luminous sources, one rod or more optical waveguides, optical collection components corresponding to solid luminous source device, wherein the optical collection component lies between solid launching luminous source and optical waveguide; the optical waveguide couples optical projection of solid luminous source device; the refracting coefficient of each optical collecting component lies between solid luminous source and optical waveguide; the device is fit for display system with red, green, blue arrays, which contains optical fiber beam and optical collecting component array.
Description
Technical field the present invention relates to optical element relevant with light source or systems technology, relates in particular to improving optical coupling technology, particularly solid state light emitter that the light source performance adopts and the coupling between optical waveguide.
One of important directions of background technology light source technology development is output brightness and the power that improves light source simultaneously.To be used for image projection, for example the light source of rear-projection TV (RPTV) or orthogonal projection instrument is an example, or to be used for transport facility, for example the headlight of automobile, motorcycle, ship or aircraft or illuminating lamp are example, they are the same with the light source of other occasion use at present, basic conventional light source, the especially arc lamp of adopting comprises high-pressure sodium lamp, xenon lamp or metal halid lamp.The deficiency of these arc lamps is: serviceable life is shorter relatively, and colourity is difficult to Be Controlled and maintenance, job insecurity (especially being under the pulse excitation pattern).Therefore a lot of application scenarios especially under the heating or the unallowed situation of powering, are necessary optical fiber or waveguide are coupled in light output.Yet, this by arc lamp to the optically-coupled of optical fiber with the cost costliness, efficient is low and the consumption volume, and causes instability because of factors such as arc itself often change.In addition, arc lamp also has potential interference to the work of other parts in the system.
Solid state light emitter, especially light emitting diode (LED) is compared with conventional light source, has advantages such as long, low in energy consumption, wavelength-tunable in serviceable life.Therefore, they are selected for use by various application occasions day by day even are first-selected.However, LED still has many performances to have much room for improvement, in the hope of obtaining wider range of application.At described high brightness and high-power output requirement, can there be two kinds of solutions in the light source of band LED at present.First kind is, by strengthening chip size and improving the performance that chip quality improves single led chip.Chip area is bigger, drive current is higher no doubt can improve light output, but diminishes the serviceable life and the luminance index of light source.And the conformity of production of large chip and heat dissipation problem have seriously limited the further raising of this method.Therefore, limit by the output of single chip, this method is mainly used in the light source of tens of lumens (lumen) order of magnitude visible domain at present.Second kind is, a plurality of led chips are packaged into a led array, to obtain higher light output, and at present can be up to hundreds and thousands of lumens.But because the lower restriction of LED packaging density in the array, the light output brightness of this led array is starkly lower than single led brightness.And improve being limited in of LED packaging density, when each LED was too close, heat was each other disturbed and is difficult to solve.Therefore, during in the face of the requiring of big brightness and higher-wattage, the still first-selected above-described conventional light source of light source at present.
Existing known, the end of optical fiber or waveguide can be optically coupled to optical fiber or waveguide in abutting connection with LED with LED.But in fact for the light emission angle of LED, less because of the light acceptance angle of in most cases optical fiber or waveguide, this coupling efficiency is very low.Even as the two optical extend (etendue of light source (comprising LED) and described optical fiber or waveguide, it is the product of the numerical aperture and the aperture number of degrees, to optical fiber or luminescent device, the aperture number of degrees are equivalent to the spot size of light) when being complementary, efficient also is difficult to be improved.As everyone knows, but also scioptics and catoptron efficiently are coupled to optical fiber or waveguide with LED light.Yet between lens and catoptron and the optical fiber because location registration difficulty makes the cost costliness to relate in particular to the coupling between led array and the optical fiber.In addition, owing to not matching of LED and the two optical extend of optical fiber, luminance brightness will obviously weaken.Moreover luminescent device has rectangular profile usually, and optical fiber or waveguide profile are circular, and this profile does not match and can further reduce coupling efficiency and light output brightness.
The summary of the invention the technical problem to be solved in the present invention is to propose a kind of new light supply apparatus and system at above-mentioned the deficiencies in the prior art, make the brightness and the power of light source output be convenient to keep, or be convenient to further improve the output performance of light source, make have different from high brightness and high-power advantage.
For solving the problems of the technologies described above, of the present inventionly be contemplated that substantially, select and utilize advantages such as solid state light emitter long-life, low-power consumption, wavelength-tunable for use, consider that solid state light emitter will just help keeping luminance brightness output to the optically-coupled of optical fiber normal surface when the two optical extend is complementary; And in most cases the size of solid state light emitter is obviously different with optical waveguide with geometric shape, for example rectangle is to circle, so must and utilize optical assembly by design, could strengthen one or more solid state light emitters to the coupling efficiency between the corresponding optical waveguide with light collection and redirection function.Like this, for comprising the light source of single solid state light emitter, can produce the harmless light output of brightness and power; For comprising the light source of a plurality of solid state light emitters, even can produce high brightness and high-power single light output by the assembly bunchy of optical fiber.For display system or vehicles photosystem, use this high brightness and power light source, tool will bring that cost is low, efficient is high and multiple advantage such as compact conformation.
As the technical scheme that realizes the present invention's design be, a kind of solid-state light light supply apparatus of efficient coupling is provided, comprise one or more can radiative solid state light emitter, especially, also comprise one or more optical waveguide, and the light collection assembly corresponding with described solid state light emitter quantity, between each described solid state light emitter and corresponding optical waveguide, described optical waveguide is coupled in the light projection of collecting from this solid state light emitter respectively; The optical extend of described optical waveguide incident end is little or equal the optical extend of this solid state light emitter.
In the such scheme, described optical waveguide comprises optical fiber or the fibre bundle of being made up of multifiber, or by the fibre bundle of multifiber Shu Zucheng.
In the such scheme, the input end of each described smooth collection assembly is adaptive to touch or comes bonding described solid state light emitter by the material with coupling refraction coefficient, and output terminal touches or comes the input end of bonding described optical waveguide by the material with coupling refraction coefficient; When described smooth collection assembly directly touched described solid state light emitter and optical waveguide, the refraction coefficient of selecting this light collection assembly was between the refraction coefficient of described solid state light emitter and optical waveguide.
Like this, each solid state light emitter can provide the output of the light with low-light level and flow loss by optocoupler efficiently is incompatible, thereby one or more solid state light emitters, comprise that light emitting diode can be packaged into concentrated light output, this light output can provide the combination of the optimal parameter on the optical principle, for example less optical extend, high brightness, big flow, high stability and reliability.
In the such scheme, described light supply apparatus also comprises substrate and supporting structure, and described one or more solid state light emitters are fixed on the substrate respectively, and obtain electric power by the electrode that forms respectively on substrate; Described supporting structure also is fixed on the substrate, and supporting and fixing described each light collection assembly dock with optical waveguide.
In the such scheme, described substrate is a printed circuit board (PCB), and described supporting structure is a reflecting body that is pre-assembled on this printed circuit board (PCB), and this reflecting body comprises some cup-shaped shrinkage pools, and is corresponding with each described solid state light emitter respectively; Each described smooth collection assembly comprises the surface that has high reflectance in the described shrinkage pool.Or
Described a plurality of solid state light emitter is light emitting semiconductor device, and they are arranged in array; Described substrate is for forming the substrate of these light emitting semiconductor devices, and each described electrode forms outside the light-emitting area of this substrate; Described supporting structure is a reflecting body bonding with this substrate light-emitting area, and this reflecting body comprises some cup-shaped shrinkage pools, and is corresponding with each described light emitting semiconductor device respectively; Each described smooth collection assembly comprises the surface that has high reflectance in the described shrinkage pool.
Like this, the present invention can make light source be easy to be made in batches produce, and implementing process is simple, helps reducing cost.
In the such scheme, described light supply apparatus also comprises the light intensity lifting subassembly of output terminal aperture less than the input end aperture, and the output end face of each described optical waveguide touches or come by the material with coupling refraction coefficient the input end face of bonding this light intensity lifting subassembly.
In the such scheme, described light supply apparatus also comprises the light conversion device of being made up of active material, receives the light from described optical waveguide, and launches the light of another wavelength or wave band.
As the technical scheme that realizes the present invention's design still, a kind of solid-state light light supply apparatus of efficient coupling is provided, comprise substrate and the Sony ericsson mobile comm ab that on this substrate, forms with big light-emitting area, especially, also comprise a fibre bundle of being made up of multifiber, these optical fiber are melt into one at the input end of this fibre bundle; And the light collection assembly between described luminescent device and fibre bundle, described fibre bundle is coupled in the light projection of collecting from this luminescent device; The refraction coefficient of described smooth collection assembly is between the refraction coefficient of described luminescent device and fibre bundle, and the optical extend of described fibre bundle incident end is little or equal the optical extend of described luminescent device.
As the technical scheme that realizes the present invention's design still, a kind of display system of using the solid-state light light supply apparatus is provided, comprise the red light source, green light source and the blue-light source that are used for producing a branch of ruddiness, a branch of green glow and a branch of blue light respectively, and be used for modulating the light valve that makes described red, green, blue light beam produce coloured image, with be used for throwing red, green, blue light beam after described light valve modulation to the optical projection camera lens of screen with the generation image, especially, described red, green, blue light source comprises the solid state light emitter array that produces red, green, blue respectively; Also comprise the fibre bundle of forming by multifiber separately, and between each described solid state light emitter and optical fiber, will collect the light collection assembly array that is coupled to corresponding optical fiber from the light projection of each described solid state light emitter.
As the technical scheme that realizes the present invention's design still, a kind of photosystem of using the solid-state light light supply apparatus is provided, be used for transport facility, comprise light source and control circuit, described control circuit provides the corresponding driving electric power to described light source according to steering order, especially, described light source comprises
The solid state light emitter array, each described solid state light emitter is launched light under the effect of described driving electric power; And
The fibre bundle that comprises multifiber, each optical fiber receives the light beam from light source;
Light collection assembly array, each light collection assembly are coupled to corresponding optical fiber with the light projection of collecting from described light source between the solid state light emitter and optical fiber of correspondence;
The light conversion device that active material is formed receives the light of described fibre bundle output, and launches the light of another wavelength or wave band;
Light filter, between described fibre bundle output end face and described light conversion device, the output light of conduction fibre bundle reflects the emission light from described light conversion device simultaneously;
Reflective optical system, be positioned at described light conversion device near so that reflect the emission light of this light conversion device towards predetermined direction.
Adopt above-mentioned each technical scheme, can improve the coupling efficiency between solid state light emitter and optical waveguide, simultaneously easy to implement.And device has low-power consumption, long-life, compact conformation, good stability, and colourity, wavelength are easy to regulation and control, are convenient to advantages such as pulsed modulation, and system can reduce cost.
Description of drawings Fig. 1 is a light supply apparatus embodiment diagrammatic cross-section of the present invention
Fig. 2 is the alternative embodiment diagrammatic cross-section of band supporting structure of the present invention
Fig. 3 is the another embodiment diagrammatic cross-section of the supporting structure of band of the present invention with surface of emission
Fig. 4 is the light supply apparatus diagrammatic cross-section of band light-emitting element array of the present invention
Fig. 5 is the diagrammatic cross-section that Fig. 4 embodiment increases the cold flow passage
Fig. 6 is the light source synoptic diagram that has a plurality of light supply apparatuses of the present invention
Fig. 7 A is that optical waveguide bundle cross-sectional view 7B is a fiber cores bundle cross-sectional view
Fig. 8 A is the fiber cores bundle cross-sectional view that transparent material is filled in the space
8B is a fused optic fiber core bundle cross-sectional view
Fig. 9 is the light supply apparatus diagrammatic cross-section that luminescent device of the present invention is coupled to many one optical waveguides
Figure 10 is the light source synoptic diagram that has a plurality of Fig. 9 embodiment device
Figure 11 is the light source diagrammatic cross-section that has Fig. 9 embodiment device array
Figure 12 is the light source embodiment diagrammatic cross-section that the present invention exports high light
Figure 13 is the light source embodiment diagrammatic cross-section of the directed output of the present invention light
Figure 14 is the led light source circuit theory diagrams
Figure 15 is the optical projection system embodiment synoptic diagram of the single photomodulator of band of the present invention
Figure 16 is the optical projection system embodiment synoptic diagram of a plurality of photomodulators of band of the present invention
Figure 17 is the headlight or the illuminator embodiment synoptic diagram of transport facility of the present invention
Wherein, each label is represented respectively: 100---the substrate or the substrate of luminescent device; 102---luminescent device; 103---lead; 104---the light collection assembly; 105---the electrode on the substrate; 106---the transparent material of coefficients match; 108---optical fiber; 110---connector; 112---supporting structure; 114---jointing material; 116---fiber cores; 118---fibre cladding; 120---reflecting body; 122---reflecting surface; 124---the cold flow passage; 150---the single fiber light-emitting device; 151---many fibrillations light-emitting device; 154---fibre bundle; 160,162---light; 170---(fusion) output terminal of fibre bundle; 171---the fusion input end of fibre bundle; 205---fibre bundle; 210---the fiber cores bundle; 220---the space is filled with the fiber cores bundle of transparent material; 230---the fused optic fiber core; 260---the light intensity lifting subassembly; 262---comprise the light conversion device of active material; 264---light filter; 268---reflective optical system; 300---have the light source of a plurality of luminescent devices; 302---light-emitting element array; 304---optical sensor; 306---temperature sensor; 308---driving circuit; 310,312---signal feedback loop; 320---the heat radiation cooling system; 400---signal processor; 402---drive signal; 404---feedback signal; 406---little apparent drive signal; 410---field lens; 420---color-combination prism; 430---light valve; 440---projection lens; 450---optical controller; 460---the directional light reverberator.
Below the embodiment, the most preferred embodiment shown in is further set forth the present invention in conjunction with the accompanying drawings.
Light supply apparatus of the present invention comprises solid state light emitter and optical waveguide at least.Described solid state light emitter can be luminous under the effect of driving electric power, such as but not limited to visible light.It comprises light emitting semiconductor device, for example light emitting diode (LED).Optical waveguide is preferred but be not limited to have flexible optical fiber or fibre bundle.In order to narrate conveniently, below among each embodiment, be example all with optical fiber or fibre bundle, comprise multimode optical fiber.
Fig. 1 has illustrated the cut-open view of light supply apparatus luminous end of the present invention.In the present embodiment, luminescent device 102 1 sides are bonded on the substrate 100 by contact electrode 105, and opposite side is connected to another contact electrode 105 by lead 103, and when applying electric power by two electrodes, luminescent device 102 is luminous.It also produces heat energy when electric energy is converted to luminous energy.Substrate 100 can adopt the material with high thermoconductivity, and for example thermal conductive ceramic (comprising alumina nitride aluminanitride) etc. is made, and is used for heat radiation.Under the prerequisite that does not cause described two contact electrode short circuits, substrate 100 can also the part employing have the material that high thermoconductivity but conducts electricity, for example aluminium, copper etc.In order to improve the luminance brightness that luminescent device 102 is coupled to optical waveguide, must consider the reflective characteristic of substrate 100, can be gold-plated or silver-plated on this substrate 100.
The present invention is analyzed as follows for the optical coupling structure that improves the light source performance and adopt: light collection assembly 104 is between described luminescent device 102 and optical fiber 108, and optical fiber 108 is coupled in the light projection that is used for collecting selfluminous element 102.In order to reduce the Fresnel loss (Fresnel loss) that occurs in the joint interface place effectively, light collection assembly 104 and luminescent device 102 or with optical fiber 108 between contact preferably by having the material of coupling refraction coefficient, for example epoxy body or gelinite come bonding.Otherwise the refraction coefficient of the described smooth collection assembly 104 that directly touches preferably between the refraction coefficient of described light emitting source and optical fiber, therefore can adopt the transparent material 106 with matching factor to change the refraction coefficient of light collection assembly 104.The refraction coefficient of transparent material 106 is the coefficient of matched fiber 108 closely, and therefore general span is 1.3～1.7.It can be by optically transparent material, and for example optical plastic or glass are formed.Can be that (UV UltravioletRays) solidifies or the bonding agent of heat-UV combination and solidification also can selected conduct has the transparent material 106 of matching factor for heat curing, ultraviolet.The light transmission of described transparent material is at the radiative specific wavelength of luminescent device.
Come the direct projection light 160 of selfluminous element 102 can pass transparent material 106 and be directly coupled to optical fiber 108.And scattered beam 162 must be avoided losing and coupled into optical fibres 108 by light collection assembly 104.Can realize light collection assembly 104 with different structure, such as but not limited to following three kinds of structures: 1. have the solid of polished surface, make by transparent material with matching factor; 2. have the solid that polishes exit facet, make, and apply reflectance coating, comprise silver, gold or aluminium film at side surface by transparent material with matching factor; 3. the dual-end reflector of making by metal or plastic cement, inside surface applies reflectance coating, for example silver, gold or aluminium film; Fill transparent material in the cup with matching factor.Their light delivery outlet is greater than optical input; Described optical input has with described solid state light emitter shape, big or small adaptive sensitive surface (as Fig. 2) or is subjected to photohole (as Fig. 1 or Fig. 3).Like this, by light collection assembly 104 structures 2. or the high reflectance side surface 3., or the reflection of the inboard total reflection surface of structure in 1., luminescent device 102 comprises that the majority emission light of light 162 will be limited in light collection assembly 104 inside, be coupled to optical fiber 108 at last.
The numerical aperture by selecting optical fiber 108 and the size of fiber cores can make the optical extend of optical fiber 108 closely mate the optical extend of luminescent device 102.Optical fiber 108 can be by optical glass (for example quartzy), optical plastic, or condensate is made.It can only comprise fiber cores, can also comprise the covering that wraps up described fiber cores.
In order to improve the brightness of optical fiber 108 coupling output, allow to select to use the optical extend optical fiber littler than luminescent device 102.Because luminescent device 102 can be luminous with non-homogeneous pattern, promptly luminous intensity is bigger at some emission angle, and the optical fiber 108 with less optical extend can receive the light from these emission angles effectively.Like this, the brightness of optical fiber 108 coupling outputs can be bigger than the mean flow rate of luminescent device 102.Therefore, described optical fiber 108 and light collection assembly 104 should be adjusted to be positioned at and make the luminescent device 102 output light position during coupled into optical fibres 108 to greatest extent.
Fig. 2 has illustrated the another embodiment of apparatus of the present invention.Supporting structure 112 is fixed on the substrate 100 by jointing material 114.If use jointing material 114, can help the heat on the substrate 100 to spread toward supporting structure 112 with thermal conductivity.In the present embodiment, if select the optical fiber that has covering 118 for use, then this optical fiber 108 can directly be patched into supporting structure 112.Between supporting structure 112 and covering 118, use bonding agent fixed fiber more quietly.Light collection assembly 104 is within described supporting structure 112.In order to realize and the aiming at and the location of optical fiber, can be embedded in again in the supporting structure 112, thereby fix light collection assembly 104 at the periphery configuration connector 110 of light collection assembly 104.Like this, the external diameter of light collection assembly 104 (or connector 110) and optical fiber 108 and the internal diameter of supporting structure 112 are complementary, the robotization that will help present embodiment light supply apparatus encapsulation process is carried out.
Fig. 3 has illustrated to the improvement of Fig. 2 embodiment.Reflecting body 120 replaces above-mentioned supporting structure 112 and light collection assembly 104, and their function of union is in one.It can be made by metal or plastic material, and the surface 122 of shrinkage pool has high reflectance.The shape on this high reflectance surface 122 is suitable for fiber cores 116 is coupled in the light reflection that comes selfluminous element 102.In the present embodiment, luminescent device 102 can be LED.It can be welded on the printed circuit board (PCB) (PCB, printed circuit board) with high heat radiation or low thermal resistance by subsides as shown in the figure, thereby needn't obtain electric power by the plain conductor shown in Fig. 1 or 2 103.This subsides weldering LED can be an example with film-type (thin-film type) LED or organic light emission LED (OLED, Organic LED).In addition, another embodiment of LED can be, utilizes semiconductor technology, substrate 100 usefulness substrates are replaced, and LED directly forms on substrate, electrically contacts the utmost point and forms in the non-light-emitting area of substrate, also needn't obtain by lead 103 thereby this LED drives electric power.For optical fiber 108 is convenient to and the efficient coupling of reflecting surface 122 location, reflecting body 120 can be designed to the shape that is complementary with optical fiber 108 insertion ends in the part of reflecting surface more than 122.Reflecting body 120 can also be assisted substrate 100 heat radiations if bond on the substrate 100 by Heat Conduction Material, thereby plays the effect of light collection assembly, supporting structure and heating radiator simultaneously.Reflecting body 120 can also be designed to the pre-assembled part on the substrate 100PCB, so that produce in batches.
Fig. 4 has illustrated to have comprised the embodiment of the invention of a plurality of luminescent devices based on Fig. 3 device.A plurality of luminescent devices are placed on the substrate 100.Be distributed with same a plurality of cupules hole on the reflecting body 120, with the optical fiber 108 that holds same quantity, each shrinkage pool comprises high reflectance surface 122.Thereby this light-emitting element array can encapsulate with a reflecting body 120.Gap between adjacent two luminescent devices 102 can be enough big, is convenient to the heat that each monomer luminescent device 102 produces more effectively is diffused into substrate 100, and do not influence other luminescent device of periphery.Generally speaking, the packaging density of luminescent device can enough be hanged down to avoid producing heat between each luminescent device and be disturbed.
Fig. 5 has illustrated improvement that Fig. 4 embodiment is done.Can increase hole or passage 124 between two shrinkage pools of reflecting body 120, be used as and be forced to cold flow, the circulation passage of air or cooling medium for example more effectively spreads or takes away the heat that luminescent device produces.Thereby the heat that has significantly reduced between the luminescent device is disturbed.
Fig. 6 has illustrated light supply apparatus of the present invention and export structure thereof.Single fiber light-emitting device 150 can be shown in Fig. 1～3 embodiment, derives the emission light of single luminescent device with simple optical fiber 108; Also can be shown in Fig. 4 or 5, with comprising that the simple optical fiber bundle of multifiber derives the emission light of light-emitting element array.Since the flexibility of optical fiber, described fibre bundle can be each optical fiber of simple and easy wrapping and.Its output polishing end face is the set of each optical fiber facet.Multifiber 108 or fibre bundle from a plurality of single fiber light-emitting devices 150 can further be wrapped up into illustrated fibre bundle 154, and with each transmission light waveguide to delivery outlet 170.The cross-sectional structure of described delivery outlet 170 can include multiple shown in Fig. 7 and 8.What Fig. 7 A illustrated is the xsect of fibre bundle 205, and wherein each optical fiber all has fiber cores 116 and covering 118.Each optical fiber in the fiber cores bundle 210 of Fig. 7 B signal then all has been removed covering, thereby can dwindle the radial dimension of fibre bundle.Owing to be removed fibre cladding, the light of propagating in an optical fiber can be coupled to adjacent fiber.Therefore when being of convenient length of this fiber cores bundle, can significantly improving the light source that causes because of each luminescent device output power and skewness and export unevenness.In order under the short condition of fiber cores bundle, also to obtain the homogeneity of light source output, can be shown in the fiber cores bundle 210 of Fig. 8 A, fill space between each fiber cores 116 with transparent material 106 with matching factor.Thereby this fiber cores bundle 210 can play the effect of light integrators.Can also utilize the plasticity of optical fiber, adopt the fused optic fiber core bundle 230 shown in Fig. 8 B, it is melted in one with each fiber cores 116 and obtains.By described fusion, each optical fiber by maximal density combine.Fibre bundle delivery outlet 170 with above-mentioned each structure is not limited to the circle shown in Fig. 7 or 8, and it can be shaped as the desired random geometry of system, comprises rectangle, triangle, ellipse or other.
Fig. 9 has illustrated another embodiment of the present invention: a luminescent device is coupled to the device of multifiber or waveguide.Can be example with substrate and the Sony ericsson mobile comm ab with big light-emitting area that forms on substrate, this device also comprises a fibre bundle of being made up of multifiber, and these optical fiber are melt into one at the input end of this fibre bundle.The coupling scheme of the light between described luminescent device and the fibre bundle can with Fig. 1,2,3,4 and 5 described the same, adopt light collection assembly 104.Different is that what light collection assembly 104 output terminals connected here is fibre bundle or the fiber cores bundle that has fusion input end 171.This input end 171 has a polishing plane, can be to comprise the arbitrary structure shown in Fig. 7 or 8.What Figure 10 illustrated is the light source that includes a plurality of many fibrillations light-emitting devices 151 shown in Figure 9.The output optical fibre of each many fibrillations light-emitting device 151 is combined into bigger fibre bundle 154 behind output port 170 separately.That Figure 11 illustrates is the another embodiment of light source that comprises a plurality of many fibrillations light-emitting devices 151.Different with above-mentioned Figure 10 is that in the present embodiment, the luminescent device of each light-emitting device correspondence is combined into a light-emitting element array on same substrate 100.
Figure 12 and 13 has illustrated based on Fig. 6 or the improved light source embodiment of 10 embodiment.The delivery outlet of fibre bundle 154 can be spherical in shape, aspheric surface or free form.The output terminal aperture of the light intensity lifting subassembly 260 of adaptive connection is less than the input end aperture with it, and described large aperture input end touches or comes bonding single optical fiber or fibre bundle by the material with coupling refraction coefficient, can strengthen the output intensity of light source.This assembly 260 can adopt the material consistent with fiber cores, also the transparent material that can adopt other refraction coefficient and fiber cores to be complementary.One of embodiment of this assembly 260 is solid-state compound parabolic line style amplitude transformer (CPC, compound parabolic concentrator).Can fill active material at the delivery outlet of this assembly 260, or engage the light conversion device 262 that comprises active material at the delivery outlet of this assembly 260.Described active material comprises fluorescent material or nano luminescent material.For example when luminescent device emission blue light or UV light time, described active material absorbs these light that is come by the fibre bundle conduction, and launches the light of another wavelength or wave band.Can also between described light intensity lifting subassembly 260 and described light conversion device 262, place light filter 264, be used for conducting the output light of fibre bundle 154, reflect emission light simultaneously from described light conversion device 262.Because this light filter 264 has stoped the coupling of active material emission light to fibre bundle, thereby strengthened the output efficiency of light source luminescent.
The embodiment of Figure 13 is on the basis of Figure 12 embodiment, increases an optical reflector 268 that invests on the light conversion device 262, is used for the concentrated predetermined direction that projects efficiently of the emission light of active material.
Figure 14 has illustrated to provide for light supply apparatus of the present invention the power supply and the cooling system part of electric power and heat radiation.It comprises radiative optical sensor 304, temperature sensor 306, driving circuit 308 and the heat radiation cooling system 320 that is used for monitoring LED 102 or led array 302.To comprising the light supply apparatus of a plurality of LED, each is that mode with parallel, serial or serial-parallel is electrically connected between single led 102.When the spacing between each monomer LED was enough big, cooling system need not to start urgent cold.Optical sensor 304 is placed in the light supply apparatus with monitoring radiative wavelength of LED or intensity.A plurality of optical sensors can be used to monitor respectively the emission light of different wave length.Typical optical sensor 304 can be the quartzy photodiode that has light filter (for example red, green or light filter of blue light), thereby monitors the LED emission light intensity of corresponding glow color.When the emission light light intensity parameter of particular color fed back to driving circuit 308 by backfeed loop 310, driving circuit 308 was sent to corresponding adjustment the drive current of this color LED.Thereby the radiative colour temperature of led array can be adjusted and keep to this closed loop feedback system.Simultaneously it can also guarantee to launch the stable of light light intensity: when comprise heat, when aging etc. various reasons causes the light detection signal weakening, the drive current that driving circuit 308 will improve LED102 or led array 302 compensates the reducing tendency of light.Temperature sensor 306 can be placed on the substrate 100 of LED, monitors the temperature of this substrate and sends feedback signal back to by backfeed loop 312, so that the setting of driving circuit 308 corresponding change heat radiation cooling systems 320.Thereby the environment temperature of LED102 or led array 302 can remain unchanged.Driving circuit 308 can provide electricity output with the form of persistent signal or pulse signal in above-mentioned application-specific.Because of above-mentioned power supply and heat dissipation technology are prior art, the present invention no longer gives unnecessary details in supply unit.
Figure 15 has illustrated to use the projection display system of light supply apparatus of the present invention.It comprises red light source, green light source and the blue-light source 300 that is used for producing a branch of ruddiness, green glow and blue light respectively, and be used for modulating and make described red, green, blue light beam produce the light valve of coloured image and be used for throwing red, green, blue light beam after described light valve modulation to the optical projection camera lens of screen with the generation image.Described red, green, blue light source 300 comprises the solid state light emitter array that produces corresponding red, green, blue respectively, also comprise the fibre bundle of forming by multifiber 154 separately, and between each described solid state light emitter and optical fiber, the light collection assembly array that is coupled to corresponding optical fiber from the light projection of each described solid state light emitter will be collected.Each fibre bundle 154 is with the emission photoconduction field lens 410 of respective sources, and the flexibility of described fibre bundle can be provided convenience for the topological design of optical projection system.Color-combination prism 420 is with red, green and blue light color separation guiding light valve 430.Described photomodulator 430 can be microelectromechanical-systems (MEMS, micro-electron-mechanical system) equipment, for example based on the light valve of the DLP of company of Texas Instrument (Texas Instrument) (Digital Light Processing) technology, it also can be liquid crystal apparatus, comprise the light valve that LCD or LcoS (Liquid Crystal On Silicon is based on the liquid crystal of crystal silicon substrate) are adopted.Signal processor 400 will be controlled light source 300 and photomodulator 430 by drive signal 406.For example, be unlocked and during red-emitting, signal processor 400 will be sent to photomodulator 430 to red image data when red-light source; Similarly, when green glow or blue light source be unlocked and launch green/during blue light, signal processor 400 will be sent to photomodulator 430 to green accordingly/blue image data.If when all red, green and blue radiants all are unlocked, the gray image data will be sent to photomodulator 430.Wherein, the feedback control loop that drive signal 402 and feedback signal 404 are formed can be kept the stability of light source colourity and brightness, and can be used to regulate the colour temperature of projected image.Image beam after projection lens 440 will be modulated projects screen.
Figure 16 has illustrated the alternative embodiment of Figure 15.Different with above-mentioned display system is that present embodiment comprises three light valves 430, places respectively between the field lens 410 and color-combination prism 420 of corresponding light source output terminal.Red, green and blue emission light from fibre bundle 154 will be modulated by light valve 430 respectively.Red, green, blue light beam after the modulation converges guiding projection lens 440 through color-combination prism 420.
The another Application Example of Figure 17 synoptic diagram light supply apparatus of the present invention is used for the photosystem of transport facility.It comprises light source and control circuit.Described control circuit comprises optical controller 450, provides the corresponding driving electric power to described light source 300 according to steering order.In conjunction with above-mentioned each light source embodiment, here optimized light source includes: by the solid state light emitter array of forming in radiative solid state light emitter under the effect of described driving electric power, the fibre bundle 154 that comprises multifiber, comprise each between the light collection assembly array that the light collection assembly between described solid state light emitter and the optical fiber is formed, the light conversion device that active material is formed, the light filter between described fibre bundle output terminal and described light conversion device, and it is neighbouring so that reflect the radiative reflective optical system 460 of this light conversion device to be positioned at described light conversion device.This reflective optical system 460 can be used shot-light light and be produced predetermined illumination profile.Optical controller 450 can receive the feedback signal from light source, to improve the performance and the serviceable life of present embodiment photosystem.
The design that is embodied as the light source output performance of light supply apparatus of the present invention is provided convenience, and can bring tangible technical advantage.For example, when the encapsulation embodiment of LED provides the efficiency light coupling, keep optical extend.And for example, the light source manufacture process of this coupling scheme has advantage low-cost and that be easy to upgrade.For another example, described LED encapsulation embodiment can provide effective heat radiation solution.
Above-mentioned described some embodiment do not limit protection scope of the present invention, and any equivalents of having done based on these embodiment also will be protected by the present invention.
Claims (18)
1. the solid-state light light supply apparatus of an efficient coupling, comprise one or more can radiative solid state light emitter, it is characterized in that:
Also comprise one or more optical waveguide; And the light collection assembly corresponding with described solid state light emitter quantity, between each described solid state light emitter and corresponding optical waveguide, described optical waveguide is coupled in the light projection of collecting from this solid state light emitter respectively;
The optical extend of described optical waveguide incident end is little or equal the optical extend of this solid state light emitter.
2. according to the solid-state light light supply apparatus of the described efficient coupling of claim 1, it is characterized in that:
Described solid state light emitter is a light emitting semiconductor device.
3. according to the solid-state light light supply apparatus of the described efficient coupling of claim 2, it is characterized in that:
Described light emitting semiconductor device is a light emitting diode.
4. according to the solid-state light light supply apparatus of the described efficient coupling of claim 1, it is characterized in that:
The fibre bundle that described optical waveguide comprises optical fiber, is made up of multifiber, or by the fibre bundle of multifiber Shu Zucheng.
5. according to the solid-state light light supply apparatus of the described efficient coupling of claim 4, it is characterized in that:
Described fibre bundle comprises the multifiber core in covering and this covering, and fill with the transparent material with matching factor in the space between each fiber cores.
6. according to the solid-state light light supply apparatus of the described efficient coupling of claim 4, it is characterized in that:
At described fibre bundle input end or outlet end part, each optical fiber or fibre bundle are melt into predetermined geometrical body.
7. according to the solid-state light light supply apparatus of the described efficient coupling of claim 1, it is characterized in that:
The input end of each described smooth collection assembly is adaptive to touch or comes bonding described solid state light emitter by the material with coupling refraction coefficient, and output terminal touches or comes the input end of bonding described optical waveguide by the material with coupling refraction coefficient;
When described smooth collection assembly directly touched described solid state light emitter and optical waveguide, the refraction coefficient of selecting this light collection assembly was between the refraction coefficient of described solid state light emitter and optical waveguide.
8. according to the solid-state light light supply apparatus of the described efficient coupling of claim 7, it is characterized in that:
The light delivery outlet of described smooth collection assembly is greater than optical input; Described optical input has with described solid state light emitter shape, big or small adaptive sensitive surface or is subjected to photohole.
9. according to the solid-state light light supply apparatus of the described efficient coupling of claim 1, it is characterized in that:
Also comprise substrate and supporting structure, described one or more solid state light emitters are fixed on the substrate respectively, and obtain electric power by the electrode that forms respectively on substrate; Described supporting structure also is fixed on the substrate, and supporting and fixing described each light collection assembly dock with optical waveguide.
10. according to the solid-state light light supply apparatus of the described efficient coupling of claim 9, it is characterized in that:
Described substrate is a printed circuit board (PCB), and described supporting structure is a reflecting body that is pre-assembled on this printed circuit board (PCB), and this reflecting body comprises some cup-shaped shrinkage pools, and is corresponding with each described solid state light emitter respectively; Each described smooth collection assembly comprises the surface that has high reflectance in the described shrinkage pool.
11. the solid-state light light supply apparatus according to the described efficient coupling of claim 9 is characterized in that:
Described a plurality of solid state light emitter is light emitting semiconductor device, and they are arranged in array; Described substrate is for forming the substrate of these light emitting semiconductor devices, and each described electrode forms outside the light-emitting area of this substrate; Described supporting structure is a reflecting body bonding with this substrate light-emitting area, and this reflecting body comprises some cup-shaped shrinkage pools, and is corresponding with each described light emitting semiconductor device respectively; Each described smooth collection assembly comprises the surface that has high reflectance in the described shrinkage pool.
12. the solid-state light light supply apparatus according to claim 10 or 11 described efficient couplings is characterized in that:
Described reflecting body inside also comprises the circulation passage of some air or cooling medium.
13. the solid-state light light supply apparatus according to the described efficient coupling of claim 1 is characterized in that:
Also comprise the light intensity lifting subassembly of output terminal aperture less than the input end aperture, the output end face of each described optical waveguide touches or comes by the material with coupling refraction coefficient the input end face of bonding this light intensity lifting subassembly.
14. the solid-state light light supply apparatus according to claim 1,9 or 13 described efficient couplings is characterized in that:
Also comprise the light conversion device of forming by active material, reception is from the light of described optical waveguide, and launches the light of another wavelength or wave band, and the light filter that is arranged on described light conversion device front end, conduction is also reflected the emission light from this light conversion device simultaneously from the light of described optical waveguide.
15. the solid-state light light supply apparatus according to the described efficient coupling of claim 14 is characterized in that:
Described active material comprises fluorescent material or nano luminescent material.
16. the solid-state light light supply apparatus of an efficient coupling comprises substrate and the Sony ericsson mobile comm ab with big light-emitting area that forms on this substrate, it is characterized in that:
Also comprise a fibre bundle of being made up of multifiber, these optical fiber are melt into one at the input end of this fibre bundle; And the light collection assembly between described luminescent device and fibre bundle, described fibre bundle is coupled in the light projection of collecting from this luminescent device; The refraction coefficient of described smooth collection assembly is between the refraction coefficient of described luminescent device and fibre bundle, and the optical extend of described fibre bundle incident end is little or equal the optical extend of described luminescent device.
17. display system of using the solid-state light light supply apparatus, comprise the red light source, green light source and the blue-light source that are used for producing a branch of ruddiness, a branch of green glow and a branch of blue light respectively, and be used for modulating the light valve that makes described red, green, blue light beam produce coloured image, with be used for throwing red, green, blue light beam after described light valve modulation to the optical projection camera lens of screen with the generation image, it is characterized in that:
Described red, green, blue light source comprises the solid state light emitter array that produces red, green, blue respectively; Also comprise the fibre bundle of forming by multifiber separately, and between each described solid state light emitter and optical fiber, will collect the light collection assembly array that is coupled to corresponding optical fiber from the light projection of each described solid state light emitter.
18. a photosystem of using the solid-state light light supply apparatus is used for transport facility, comprises light source and control circuit, described control circuit provides the corresponding driving electric power to described light source according to steering order, it is characterized in that: described light source comprises
The solid state light emitter array, each described solid state light emitter is launched light under the effect of described driving electric power; And
The fibre bundle that comprises multifiber, each optical fiber receives the light beam from light source;
Light collection assembly array, each light collection assembly are coupled to corresponding optical fiber with the light projection of collecting from described light source between the solid state light emitter and optical fiber of correspondence;
The light conversion device that active material is formed receives the light of described fibre bundle output, and launches the light of another wavelength or wave band;
Light filter, between described fibre bundle output end face and described light conversion device, the output light of conduction fibre bundle reflects the emission light from described light conversion device simultaneously;
Reflective optical system, be positioned at described light conversion device near so that reflect the emission light of this light conversion device towards predetermined direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66749605P | 2005-04-01 | 2005-04-01 | |
| US60/667,496 | 2005-04-01 |
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| CN1847898A true CN1847898A (en) | 2006-10-18 |
| CN100501476C CN100501476C (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100742401A Active CN100501476C (en) | 2005-04-01 | 2006-04-03 | High efficient light coupling of solid-state light source device and application system thereof |
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| CN (1) | CN100501476C (en) |
| WO (1) | WO2006102846A1 (en) |
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| CN100501476C (en) | 2009-06-17 |
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Effective date of registration: 20190226 Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: Shenzhen Guangfeng Polytron Technologies Inc Address before: 518057 4TH-5TH Floor, Qiongyu Road, Nanshan Science Park, Shenzhen, Guangdong Province Co-patentee before: Xu Li Patentee before: Li Yi |