CN105159020A - Light source system and associated projection system - Google Patents
Light source system and associated projection system Download PDFInfo
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- CN105159020A CN105159020A CN201510570816.2A CN201510570816A CN105159020A CN 105159020 A CN105159020 A CN 105159020A CN 201510570816 A CN201510570816 A CN 201510570816A CN 105159020 A CN105159020 A CN 105159020A
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Abstract
Embodiments of the invention disclose a light source system and an associated projection system. The light source system comprises an excitation light source for generating exciting light and a wavelength conversion apparatus; the exciting light enters the wavelength conversion apparatus; the wavelength conversion apparatus comprises a base including a first surface where a micro-structure array is formed; the micro-structure array comprises concave-pit-shaped micro-structure units; wavelength conversion materials are arranged in each concave pit; scattering reflection layers are arranged among the concave pits; the first surface of the base faces to the incident exciting light; the wavelength conversion apparatus further comprises a reflection layer positioned on one side, back to the exciting light incidence, of the wavelength conversion materials; the light spots formed on the first surface of the exciting light cover at least part of one micro-structure unit as well as cover at least part of the scattering reflection layers to enable the exciting light, after being scattered and reflected, to be mixed with excited light to emit from the first surface. The invention can provide a light source system capable of controlling the color coordinate of the mixed incident light more easily.
Description
The application is applicant is 201210428520.3 in the application number that on October 31st, 2012 submits, and denomination of invention is the divisional application of " light-source system and relevant projecting system ".
Technical field
The present invention relates to illumination and display technique field, particularly relate to a kind of light-source system and relevant projecting system.
Background technology
At present, solid state light emitter, due to its feature such as long-life, environmental protection, is widely used in general illumination, special lighting and Projection Display.Wherein, white solid state light source has huge development potentiality especially at lighting field.
The method realizing white solid state light source uses a blue-light excited yellow fluorescent powder, the gold-tinted utilizing yellow fluorescent powder to be excited to produce with do not have absorbed residue blue light to obtain white light.Although this scheme can obtain the mixed light of Stimulated Light and exciting light, there is the bad problem of color homogeneity in such mixed light.In two kinds of compositions of mixed light, the luminous Light distribation of Stimulated Light is generally lambertian distribution, i.e. isotropic distribution, the Light distribation of exciting light is then subject to the impact of the factors such as the Light distribation of exciting light before inciding fluorescent powder, the thickness distribution of fluorescent powder, general is not desirable isotropic distribution, this ratio regular meeting just causing exciting light and Stimulated Light in all directions of mixing emergent light changes, and then the color of the white light synthesized is changed, destroy the color homogeneity of light source.
In order to make the white light of outgoing more even, generally also adulterate in yellow fluorescence bisque some diffusion materials, to carry out scattering to blue excitation light, improves the homogeneity of the white light of outgoing.But, predetermined chromaticity coordinates is reached to the chromaticity coordinates of the white light making outgoing in this scheme, the technique that fluorescent powder grain and diffusion material particle need be mixed is controlled, as thickness, ratio, the granularity of diffusion material, the settling velocity and settling time etc. of diffusion material particle that astigmatism particle accounts for of phosphor powder layer.But the control difficulty of these techniques is comparatively large, cause making the white light of wavelength conversion layer outgoing to reach the difficulty of predetermined chromaticity coordinates larger.
Summary of the invention
The technical matters that the present invention mainly solves is to provide the light-source system that a kind of chromaticity coordinates controlling to mix emergent light is more prone to.
The embodiment of the present invention provides a kind of light-source system, comprises the excitation source for generation of exciting light and Wavelength converter, and this exciting light is incident in this Wavelength converter, and this Wavelength converter comprises:
Substrate, comprises first surface, and the first surface of this substrate is formed with micro structure array, and this micro structure array comprises microstructure unit, and wherein each microstructure unit is pit shape, and is provided with material for transformation of wave length in each pit;
Spacing between two microstructure units of arbitrary neighborhood is greater than zero, and first surface is equipped with diffuse reflective layer between each microstructure unit;
The first surface of described substrate is towards the exciting light of described incidence, and described Wavelength converter also comprises reflection horizon, is positioned at the side of described material for transformation of wave length described exciting light incidence dorsad; The hot spot that described exciting light is formed on the first surface covers at least part of of a microstructure unit, Stimulated Light is produced to excite the material for transformation of wave length in this microstructure unit, this hot spot also covers at least part of of diffuse reflective layer between this microstructure unit and adjacent microstructure unit, mixes and from first surface outgoing to make described exciting light after this diffuse reflective layer scattered reflection with this Stimulated Light.
The embodiment of the present invention also provides a kind of optical projection system, comprises above-mentioned light-source system.
Compared with prior art, the present invention includes following beneficial effect:
In the present invention, due to Wavelength converter being separated from each other for the microstructure unit being provided with material for transformation of wave length of outgoing Stimulated Light and the diffuse reflective layer for outgoing exciting light, predetermined color coordinate time controls to mix emergent light chromaticity coordinates by the ratio of the area controlling micro structure array shared by the amount of material for transformation of wave length and diffuse reflective layer is reached at the chromaticity coordinates of the mixed light of the exciting light and Stimulated Light that make Wavelength converter outgoing, compare the control device of background technology scheme, the present invention can be more prone to easy; And each microstructure unit is pit shape, compare the wavelength conversion layer of surfaces being flat shape, the contact area of medium wavelength transition material of the present invention and substrate increases, and is more conducive to the heat radiation of material for transformation of wave length, and then improves the work efficiency of material for transformation of wave length.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of light-source system of the present invention;
Fig. 2 is the vertical view of the micro structure array shown in Fig. 1;
Fig. 3 is the structural representation of another embodiment of light-source system of the present invention.
Embodiment
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Refer to Fig. 1, Fig. 1 is the structural representation of an embodiment of light-source system of the present invention.Light-source system 100 comprises excitation source 11 and Wavelength converter 12.Wavelength converter 12 comprises substrate 101, reflection horizon 109 and material for transformation of wave length 103.
Substrate 101 comprises first surface 101a, and this first surface 101a is formed with micro structure array 105, and this micro structure array 105 comprises microstructure unit 15, and wherein each microstructure unit 15 is in pit shape.In the present embodiment, this pit is tetrapyamid shape.As shown in Figure 2, Fig. 2 is the vertical view of the micro structure array shown in Fig. 1.In the present embodiment, the opening of each pit 15 in tetrapyamid shape is square.In practice, each microstructure unit 15 also can be other pyramid-shaped, coniform, prism-frustum-shaped, prism-shaped or other shapes hemispherical etc.
First surface 101a is provided with reflection horizon 109, and the fluctuating on the surface in this reflection horizon 109 and the fluctuating of this first surface consistent.Micro-structure surface on first surface 101a is arranged reflection horizon and have multiple method, wherein one plates reflectance coating in this microstructure.Modal reflectance coating is silverskin, its reflectivity up to 98% or more than; All right aluminizer, its reflectivity reaches more than 94%; Or also can the hybrid films of plating and medium.
When plated film, if directly may there is the not high problem of plated film firmness in silver-plated film or aluminium film on the surface of the substrate.Therefore, before silver-plated film or aluminium film, one deck chromium film or titanium film is first plated to improve plated film firmness.Consider that silver and aluminium are very easily oxidized in atmosphere, this greatly can reduce reflectivity; Therefore, the diaphragm of layer of transparent medium is preferably plated again with starvation at silverskin or aluminium film surface, such as silicon oxide film.
On reflection horizon 109 on each microstructure unit 15 surface in micro structure array 105, be filled with material for transformation of wave length 103.This material for transformation of wave length is for absorbing a kind of light of wavelength coverage and the light of the another kind of wavelength coverage of outgoing.The most frequently used material for transformation of wave length is fluorescent powder, such as YAG fluorescent powder, and it can absorb blue light and the Stimulated Light of stimulated emission yellow.Material for transformation of wave length may be also the material that quantum dot, fluorescent dye etc. have wavelength conversion capability, is not limited to fluorescent powder.
Under many circumstances, material for transformation of wave length is Powdered or granular often, needs to use a kind of bonding agent that each material for transformation of wave length particle is fixed together, and forms specific shape.In the present embodiment, material for transformation of wave length fully can be mixed with organic transparent adhesive, material for transformation of wave length is dispersed among organic transparent adhesive and form fluorescent slurry, then this fluorescent slurry is inserted in each microstructure unit 15.
In fact, cementing agent is not limited to organic translucent adhesive, also can be inorganic binder, such as water glass, silica dioxide granule, titanium dioxide granule etc.After inorganic binder fully mixes with material for transformation of wave length, intergranular Van der Waals force and intermolecular acting force can be utilized together with adjacent material for transformation of wave length particles stick, play fixing and shaping effect.
In micro structure array 105 arbitrary neighborhood two microstructure units 15 between spacing be greater than zero, and be equipped with diffuse reflective layer 107 between each microstructure unit.
Excitation source 11 for generation of exciting light L1, to excite the material for transformation of wave length 103 in Wavelength converter 12 and then to produce Stimulated Light.Conventional excitation source has LED light source, LASER Light Source or other solid luminescent light sources.In the present embodiment, excitation source 11 is for generation of blue excitation light L1.Yellow fluorescent powder is provided with, for absorbing blue light and producing yellow Stimulated Light L2 in micro structure array 105.Yellow Stimulated Light L2 is mixed to form white light outgoing with the blue Stimulated Light being scattered reflection horizon 107 scattered reflection.
Micro structure array 105 has the exciting light L1 of one side towards incidence of fluctuating.The hot spot that exciting light L1 is formed on first surface 101a covers at least part of of a microstructure unit, produces Stimulated Light to excite the material for transformation of wave length in this microstructure unit.This hot spot also covers at least part of of diffuse reflective layer between this microstructure unit and adjacent microstructure unit, mixes and from first surface 101a outgoing to make exciting light L1 after this diffuse reflective layer scattered reflection with by the Stimulated Light of reflective layer reflects.
Because the microstructure unit 15 being provided with material for transformation of wave length for outgoing Stimulated Light on Wavelength converter 12 is separated from each other with the diffuse reflective layer 107 for reflected excitation light in the present embodiment, make when the chromaticity coordinates of the mixed light of the exciting light and Stimulated Light controlling Wavelength converter 12 outgoing, ratio by the area controlling micro structure array 105 shared by the amount of microstructure unit 15 medium wavelength transition material and diffuse reflective layer 107 controls to mix the chromaticity coordinates of emergent light, compare the scheme in background technology, the present invention can be more prone to control the chromaticity coordinates of mixing emergent light.And each microstructure unit 15 is in pit shape, compare the wavelength conversion layer of surfaces being flat shape, the contact area of medium wavelength transition material of the present invention and substrate increases, and is more conducive to the heat radiation of material for transformation of wave length, and then improves the work efficiency of material for transformation of wave length.
In the present embodiment, diffuse reflective layer 107, by the face first on the first surface 101a of substrate between each microstructure unit plates reflectance coating, then arranges astigmatism stratum granulosum to realize between each microstructure unit.After exciting light L1 enters diffuse reflective layer 107, the refraction on different directions is there is at the different astigmatism particles in astigmatism stratum granulosum, again through the reflection of reflectance coating, make exciting light from direction of propagation during diffuse reflective layer 107 outgoing by upsetting from multiple directions outgoing, and then and outgoing Stimulated Light mixing outgoing.Because astigmatism particle itself to have the effect of reflection to light beam, this astigmatism stratum granulosum, when the thickness along direction of beam propagation is enough large, does not need this astigmatism stratum granulosum of plating reflectance coating can reflected excitation light L1 yet.In the present embodiment, because reflection horizon is arranged on the surface of each microstructure unit in micro structure array, in the manufacturing process of this Wavelength converter, can be on the first surface, comprise on the face between the surface of each microstructure unit and each microstructure unit, all plate reflectance coating, realize the reflection function of reflection horizon in the present embodiment and diffuse reflective layer, and then face between each microstructure unit arranges astigmatism stratum granulosum.
In the present embodiment, also first by the face roughening between microstructure unit 15 each on first surface 101a, and then reflectance coating can be plated to realize diffuse reflective layer 107 on the face of roughening at this.By making this surface irregularity, when making exciting light enter this diffuse reflective layer, because incident angle is different, refraction angle is different at same place for uneven light; And the light be parallel to each other to not the existing together of face of this roughening time, because the angle of inclination of the reflecting surface do not existed together is different, the direction of propagation of the exciting light after reflection becomes not parallel, to make exciting light after multiple directions outgoing, and then reaches the mixed uniformly effect with Stimulated Light.
It is easily understood that when the microstructure unit that hot spot that exciting light is formed on Wavelength converter 12 covers and diffuse reflective layer more time, the Stimulated Light of outgoing and the mixed light of exciting light more even.Because in practice, the size of hot spot is certain, the microstructure unit therefore on Wavelength converter is that array is arranged, and the size of each microstructure unit is done less as far as possible.
Material for transformation of wave length can produce heat in the process be stimulated, and the accumulation of these heats can affect luminescence efficiency and the life-span of material for transformation of wave length, therefore, substrate is preferably made up of Heat Conduction Material, as silicon, metal or glass, to dispel the heat to material for transformation of wave length.Wherein the making material of substrate is preferably silicon.Due to the wet anisotropic corrosive property of monocrystalline silicon, namely there is very large difference to the corrosion speed of the different crystal faces of monocrystalline silicon in corrosive liquid in specific wet etching liquid, can form the smooth pit array of multiple smooth surface on the monosilicon.Smooth being conducive to of pit surface plates reflectance coating in pit array.
Embodiment two
Refer to Fig. 3, Fig. 3 is the structural representation of another embodiment of light-source system of the present invention.Light-source system 300 comprises excitation source 31 and Wavelength converter 32.Wavelength converter 32 comprises substrate 301, reflection horizon (not shown) and material for transformation of wave length 303.
The difference part of the present embodiment and embodiment one comprises:
Material for transformation of wave length 303 is arranged in each microstructure unit 35 with stratiform, and the fluctuating on the surface of wavelength conversion layer 303 is consistent with the fluctuating on the surface of microstructure unit 35 each in micro structure array 305.Like this, be parallel in the bearing of trend of micro structure array 305 on edge, the surface area of the material for transformation of wave length of the reception exciting light L1 in unit plane area increases, compare the wavelength conversion layer 303 that an overall and surface is plane, the optical power density that material for transformation of wave length in Wavelength converter 32 in the present embodiment receives declines, and then light conversion efficiency improves.And the surface area of wavelength conversion layer 303 increases, and makes its radiating effect better.
Be full-shape outgoing during wavelength conversion layer 303 outgoing Stimulated Light, because each microstructure unit in microstructure unit is pit shape, in the present embodiment, the Stimulated Light outgoing in two kinds of situation that the wavelength conversion layer 303 in pit produces: one is direct outgoing, as the Stimulated Light L2 in figure; Incide when another kind is outgoing on the wavelength conversion layer in this pit and be reflected again, as the Stimulated Light L3 in figure, and can not incide in other microstructures and be reflected again.
Therefore, if the hot spot S1 that exciting light L1 is formed on Wavelength converter 32 just in time covers a microstructure unit, so Stimulated Light emergent light spot area is the aperture area of this microstructure unit, emergent light spot area does not cause expansion, and wherein this hot spot S1 refers to that exciting light L1 is along Wavelength converter 32 being parallel to the hot spot that the plane of the bearing of trend of first surface is formed.The hot spot S1 formed on Wavelength converter 32 as exciting light L1 covers multiple microstructure unit, if the marginal portion of this hot spot S1 covers a part for a microstructure unit respectively, owing to being full-shape outgoing during wavelength conversion layer 303 outgoing Stimulated Light, Stimulated Light in outgoing direct in each microstructure unit or outgoing after the inwall reflection of this microstructure unit, the reflection of the microstructure unit inside that the facula area of the Stimulated Light of final outgoing is covered at hot spot edge because of light and increasing.The upper limit increased is increase the bore of a microstructure unit respectively at the two ends of a radial direction of hot spot.
It is easily understood that when enough relative to the diameter of hot spot S1 hour of the bore of each microstructure, the enlarged degree of Stimulated Light emergent light spot can be ignored.Now, for improving the utilization factor of exciting light, make exciting light to be all incident on wavelength conversion layer, the microstructure unit on first surface is that array is arranged.And when the mean distance of two microstructure units adjacent in micro structure array is less than or equal to 1/4 of the external diameter of a circle D1 at hot spot S1 place, the enlarged degree of Stimulated Light emergent light spot can also accepting in scope.More preferably, the mean distance of two microstructure units adjacent in micro structure array is less than or equal to 1/10 of the external diameter of a circle D1 at hot spot S1 place, and such micro structure array can neglect the effect that the emergent light spot of Stimulated Light expands.
In the present embodiment, if the thickness of wavelength conversion layer 303 is excessive, the fluctuating quantity on the surface of wavelength conversion layer 303 can be made less, reduce the effect of micro structure array 305 pairs of wavelength conversion layer 303 area increaseds on first surface 301a.Therefore, the average thickness of wavelength conversion layer 303 is preferably less than or equal to the mean distance of two microstructure units adjacent in micro structure array 305, mean distance wherein between adjacent two microstructure units refers to the mean value of the distance of the central shaft of any two adjacent microstructure units in micro structure array.More preferably, the average thickness of wavelength conversion layer 303 is less than or equal to 0.25 times of the mean distance of two microstructure units adjacent in micro structure array 305, and like this, the effectiveness comparison that the surface area of wavelength conversion layer increases is remarkable.
Concrete example, in practice, the external diameter of a circle at hot spot S1 place is generally and is greater than 1mm and is less than 3mm.So corresponding, the mean distance of two microstructure units adjacent in micro structure array is preferably greater than 0.1mm and is less than 0.3mm.According to the size of microstructure unit, consider the manufacture craft of wavelength conversion layer, the average thickness of preferred wavelength conversion layer is preferably greater than 0.05mm and is less than 0.2mm.
In above two embodiments, substrate also can be made with transparent material, and the reflection horizon be arranged on micro structure array also can not be arranged in microstructure unit, but is arranged on the second surface relative with first surface of substrate.A Stimulated Light part for material for transformation of wave length outgoing in each microstructure unit is from first surface outgoing, and another part Stimulated Light enters substrate and reflected by second surface rear through material for transformation of wave length and from first surface outgoing.Like this, because reflection horizon is arranged on plane second surface instead of be provided with on the first surface of micro structure array, can be fairly simple during plating reflectance coating.But have partially-excited light in substrate after multiple reflections outgoing cause the hot spot of the Stimulated Light of outgoing to spread.
As seen from the above embodiment, reflection horizon is not to be arranged on the surface of each microstructure unit, as long as be arranged on the side of material for transformation of wave length exciting light incidence dorsad, the mixed light of Stimulated Light and exciting light just can be made from the exciting light light incident side outgoing of Wavelength converter.But, device such as the reflectance coating realizing the reflection function of diffuse reflective layer then needs to arrange on the first surface between each microstructure unit, can ensure directly to be used for carrying out conjunction light with Stimulated Light through the exciting light of diffuse reflective layer scattered reflection, and then make to be more prone in the amount for the exciting light closing light that controls.If the reflectance coating of the reflection function realizing diffuse reflective layer is arranged on other positions, such as be arranged on together with reflection horizon on the second surface of substrate, have part exciting light and enter on the reflectance coating on second surface transmitted through the scattering surface between each microstructure unit, exciting light through this reflecting film reflects has portions incident on the material for transformation of wave length in micro structure array, and this material for transformation of wave length is excited, and the ratio of this part exciting light is more difficult determines, cause final uncertain for the amount of the exciting light closing light.
In above each embodiment, the exciting light for the synthesis of mixing emergent light is different with the ratio of Stimulated Light, and the chromaticity coordinates of the mixing emergent light that it can be caused to synthesize is different.Concentration one timing of the micro structure array medium wavelength transition material in Wavelength converter, the ratio of the surface area that in the mixed light of outgoing, the ratio of exciting light and Stimulated Light is decided by each microstructured bodies that the hot spot that exciting light is formed on Wavelength converter covers and the surface area of scattering surface covered; It is easily understood that work as microstructure enough hour, this ratio is similar to the ratio of the surface area of each microstructured bodies and the surface area of scattering surface in micro structure array.The ratio accounting for the micro structure array total area by the surface area of scattering surface due to the ratio of the exciting light composition in mixing emergent light determines, the ratio that the ratio of Stimulated Light composition accounts for the micro structure array total area by the surface area of each microstructured bodies determines; Therefore, the chromaticity coordinates of mixing emergent light as required can determine the ratio of exciting light and Stimulated Light, and then determine the ratio of the surface area of each microstructured bodies and the surface area of scattering surface in micro structure array, reach with the chromaticity coordinates of the mixed light making final light-source system outgoing the chromaticity coordinates needed in advance.
In above each embodiment, excitation source and Wavelength converter are geo-stationary.In practice, drive unit also can be adopted to drive Wavelength converter motion, and the hot spot that exciting light is formed on Wavelength converter moves by predefined paths.Like this, the heat-sinking capability of Wavelength converter can be improved further.Such as, motor can be adopted to drive Wavelength converter to rotate, and the hot spot formed on Wavelength converter to make exciting light periodically acts on micro structure array by circular path.
Further, light-source system can also comprise control device, and micro structure array comprises at least two zoness of different, the surface area of each microstructure wherein on these two regions is different from the ratio of the surface area of scattering surface, and the predetermined color coordinate of mixing emergent light corresponding to different proportion in zones of different.When needing the chromaticity coordinates changing mixing emergent light, control device sends a control signal to drive unit, and wherein this control signal comprises type of drive.Drive unit obtains this control signal, and according to type of drive included in this control signal, Wavelength converter is driven, the motion path of the hot spot that exciting light is formed on Wavelength converter is converted in presumptive area, with the mixed light making Wavelength converter outgoing meet predetermined color coordinate figure.
Concrete example, in the present embodiment, drive unit is for driving Wavelength converter periodic rotary.Accordingly, each microstructured bodies in micro structure array can be multiple endless parallel laid out in parallel.In different rings, the spacing between each microstructured bodies is different, and namely the area of scattering surface is different.In the present embodiment, the spacing in the ring that outermost one encloses between each microstructured bodies is maximum.Direction radially, the spacing in different rings between each microstructured bodies reduces gradually, and the area of the scattering surface in namely more inner ring is less, then to account for the ratio of the mixed light of outgoing less for exciting light, and the ratio that Stimulated Light accounts for the mixed light of outgoing is larger.When changing the chromaticity coordinates of mixed light of outgoing, the ratio that exciting light accounts for the mixed light of outgoing if need increase, then control device sends a control signal to drive unit, drive unit is made to drive Wavelength converter motion, to change the position of the hot spot that exciting light is formed on micro structure array, the direction making it the center of circle radially carrying micro structure array is moved toward outer shroud.The ratio that Stimulated Light accounts for the mixed light of outgoing if need increase, control device sends a control signal to drive unit, makes drive unit drive Wavelength converter motion, radially moves toward inner ring towards the center of circle of micro structure array to make the position of hot spot.
More than just different from the ratio of the surface area of scattering surface to the surface area of the microstructured bodies in micro structure array in the zones of different of Wavelength converter citings is described, it is not limited.In practice, also can be that the spacing in the ring of outermost one circle between each microstructured bodies is minimum; And direction radially, the spacing in different rings between each microstructured bodies increases gradually, and the area of the scattering surface in namely more inner ring is larger, then to account for the ratio of the mixed light of outgoing larger for exciting light, and the ratio that Stimulated Light accounts for the mixed light of outgoing is less.
Or in micro structure array, each microstructured bodies is square array distribution, and in the every a line wherein in this square array, each microstructured bodies is uniformly distributed, namely the surface area of each microstructured bodies is consistent and the surface area of scattering surface between each microstructured bodies is consistent; And the surface area of each microstructured bodies is different from the ratio of the surface area of scattering surface in different rows.Such as, along the direction perpendicular to each row, in different rows, the ratio of the surface area of each microstructured bodies and the surface area of scattering surface reduces gradually.Accordingly, drive unit is linear translation device, make hot spot respectively linearly path act on certain a line in this micro structure array.When the chromaticity coordinates of mixed light of outgoing need be changed, by control device accessory drive, to change the row at the hot spot place that exciting light is formed on Wavelength converter.Certainly, in the present embodiment, also can uneven distribution with microstructured bodies each in a line in square micro structure array, as long as the mean color coordinates of the mixing emergent light produced when the hot spot making exciting light be formed on Wavelength converter moves in a line is wherein different from the mean color coordinates of the mixing emergent light produced when other row move.
For realizing the chromaticity coordinates more accurately changing mixing emergent light, light-source system can further include sniffer, for detecting and the chromaticity coordinates this detected feeds back to user or control device the chromaticity coordinates of mixing emergent light.If feed back to user, then user can carry out Non-follow control control device according to the gap of the chromaticity coordinates detected and predetermined color coordinate and carry out accessory drive, and the hot spot that exciting light is formed on Wavelength converter moves toward precalculated position.If feed back to control device, then control device can pre-determine predetermined color coordinate, and calculate the gap of chromaticity coordinates and the predetermined color coordinate detected, when this gap exceeds predetermined threshold, control device transmits control signal to drive unit, drive unit drives Wavelength converter to move according to this control signal, and the hot spot that exciting light is formed on Wavelength converter moves to the chromaticity coordinates that makes the to detect position consistent with predetermined color coordinate.
Concrete example, in the present embodiment, blue excitation light and yellow Stimulated Light are mixed into white light outgoing.Because the chromaticity coordinates of white light and colour temperature can convert mutually, for ease of calculating, sniffer is for detecting the colour temperature of white light.The amplitude that the pre-set Wavelength converter of control device moves at every turn, in the present embodiment, this amplitude is the amplitude D0 of wavelength conversion layer radially translation, and the colour temperature presetting white light is S1, and predetermined threshold is S0.
The light signal of the white light of detection Wavelength converter outgoing, and obtain the colour temperature of this white light, be recorded as S2.This colour temperature is fed back to control device by sniffer.Control device first judges the difference of predetermined colour temperature S1 and actual colour temperature S2.If the difference of S1 and S2 is less than S0, then control device does not have action.If the difference of S1 and S2 is more than or equal to S0, then the size of control device to S1 and S2 judges.If S1 is greater than S2, then control device transmits control signal to drive unit, and make drive unit drive Wavelength converter toward increasing the direction translation of colour temperature S2 once, the amplitude of translation is predetermined amplitude D0.If S1 is less than S2, then control device transmits control signal to drive unit, and make drive unit drive Wavelength converter toward reducing the direction translation of colour temperature S2 once, the amplitude of translation is predetermined amplitude D0.After Wavelength converter translation, sniffer detects light signal again, and obtains the new colour temperature of white light, is recorded as S3.This colour temperature is fed back to control device by sniffer.Control device first judges the difference of predetermined colour temperature S1 and actual colour temperature S3.With this reciprocally, until when the difference of actual colour temperature and predetermined colour temperature S1 is less than pre-established threshold S0, control device stops drive unit to the driving of Wavelength converter.Like this, the adjustment of the colour temperature of white light is made to reach robotization, and more accurate.
Additionally, control device can also pre-set mapping table.The different range of the difference of actual colour temperature and predetermined colour temperature is contained in this mapping table, and the type of drive corresponding to variant difference range, this type of drive comprises the amplitude and direction that drive Wavelength converter motion.When the actual colour temperature detected is sent to control device by sniffer, control device first judges whether the difference of this actual colour temperature and predetermined colour temperature exceeds predetermined threshold.If this difference does not exceed predetermined threshold, then control device does not have action.When this difference exceeds predetermined threshold, control device obtains the type of drive corresponding to this difference and produces control signal from mapping table, and sending this control signal to drive unit, this control signal comprises type of drive, namely drives direction and the amplitude of Wavelength converter motion.Drive unit drives Wavelength converter according to the type of drive in control signal, makes Wavelength converter according to predetermined amplitude and direction motion.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
The embodiment of the present invention also provides a kind of optical projection system, comprises light-source system, and this light-source system can have the structure and fuction in the various embodiments described above.This optical projection system can adopt various shadow casting technique, such as liquid crystal display (LCD, LiquidCrystalDisplay) shadow casting technique, digital light path processor (DLP, DigitalLightProcessor) shadow casting technique.In addition, above-mentioned light-source system also can be applied to illuminator, such as stage lighting illumination.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a light-source system, for ejecting white light, is characterized in that, comprising:
For generation of the excitation source of exciting light;
The Wavelength converter of stimulated luminescence is produced for receiving exciting light; Described Wavelength converter comprises the microstructure unit of pit shape, be provided with diffuse reflective layer between two microstructure units of wherein arbitrary neighborhood and spacing is greater than zero, exciting light is for covering at least part of of at least part of and at least one diffuse reflective layer of at least one microstructure unit;
Sniffer, the actual colour temperature for the white light to outgoing detects and actual colour temperature is fed back to control device;
Control device, for receiving actual colour temperature, and produces control signal according to the difference of the gentle actual color coordinate of predetermined color;
Drive unit, for receiving described control signal, and drives Wavelength converter to move to the actual colour temperature position consistent with predetermined colour temperature according to control signal.
2. light-source system according to claim 1, is characterized in that,
Described control device for storing the mapping table of the difference of predetermined colour temperature S0 and actual colour temperature S1, and produces the control signal corresponding to mapping table to drive unit according to difference; The different control signals that different difference range is corresponding are stored in described mapping table;
Described drive unit, for reception control signal, and drives the Wavelength converter motion amplitude corresponding with control signal and direction.
3. light-source system according to claim 1, is characterized in that,
Described control device is used for according to difference, produces predetermined control signal to drive unit; Wherein, control signal comprises direction and the predetermined amplitude of Wavelength converter motion;
Described drive unit, for receiving described control signal, and drives Wavelength converter motion predetermined amplitude according to control signal.
4. a method for the chromaticity coordinates adjustment of the white light of light-source system outgoing, described light-source system, for generation of white light, comprises the excitation source for generation of exciting light; The Wavelength converter of stimulated luminescence is produced for receiving exciting light; Described Wavelength converter comprises the microstructure unit of pit shape, diffuse reflective layer is provided with and spacing is greater than zero between two microstructure units of wherein arbitrary neighborhood, exciting light, for covering at least one microstructure unit and a diffuse reflective layer, is characterized in that, described method comprises the steps:
A1, sniffer for detecting the actual colour temperature S1 of the white light of outgoing, and feed back actual colour temperature S1 to control device;
A2, control device, according to the difference of predetermined colour temperature S0 and actual colour temperature S1, judge whether the control signal producing drive unit; If generation control signal, then enter steps A 3; Otherwise, terminate;
A3, drive unit drive Wavelength converter motion according to control signal;
Repeat above-mentioned steps, until the difference of the gentle actual colour temperature of predetermined color is in predetermined threshold range.
5. method according to claim 4, is characterized in that, described A2 is specially:
Controller judges that the difference of predetermined colour temperature S0 and actual colour temperature S1 is whether in predetermined threshold range;
If be greater than predetermined threshold, and S0 > S1, then produce the first control signal, if be greater than predetermined threshold, and S0 < S1, then produce the second control signal; Enter steps A 3;
If be less than predetermined threshold, then do not produce control signal; Terminate.
6. method according to claim 5, is characterized in that, described A3 is specially:
Drive unit receives the first control signal, and drive unit drives Wavelength converter to move to first direction; Drive unit receives the second control signal, and drive unit drives Wavelength converter to move to second direction; Wherein, Wavelength converter moves to first direction, and actual colour temperature increases; Wavelength converter moves to second direction, and actual colour temperature reduces.
7. method according to claim 4, is characterized in that, described steps A 3 is specially:
Drive unit drives Wavelength converter translation predetermined amplitude D0 according to control signal.
8. method according to claim 4, is characterized in that, described steps A 2 is specially:
Control device prestores the mapping table of difference of predetermined colour temperature S0 and actual colour temperature S1, according to the difference of predetermined colour temperature S0 and actual colour temperature S1, judges difference position in the mapping table, produces corresponding control signal.
9. method according to claim 8, is characterized in that, described steps A 2 is specially:
Control device prestores the mapping table of control signal corresponding to the difference range of predetermined colour temperature S0 and actual colour temperature S1;
Control device receives actual colour temperature S1, and judges whether the difference of predetermined colour temperature S0 and actual colour temperature S1 is greater than threshold value;
If be greater than predetermined threshold, search the control signal of the correspondence of difference range in mapping table, and send corresponding control signal to drive unit;
If be less than predetermined threshold, then do not produce control signal; Terminate.
10. method according to claim 8, is characterized in that, described steps A 3 is specially:
Drive unit drives amplitude and the direction of Wavelength converter motion according to corresponding control signal; Wherein, the amplitude that different difference range is corresponding different.
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Also Published As
| Publication number | Publication date |
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| CN105159020B (en) | 2017-07-11 |
| CN103792768B (en) | 2015-09-09 |
| CN103792768A (en) | 2014-05-14 |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address after: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518055 Guangdong province Shenzhen Nanshan District Xili town Cha Guang road Shenzhen integrated circuit design application Industrial Park 401 Patentee before: APPOTRONICS Corp.,Ltd. |