CN101498415A - Light source for improving mixing light emergent efficiency by fluorescent powder and method thereof - Google Patents
Light source for improving mixing light emergent efficiency by fluorescent powder and method thereof Download PDFInfo
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Abstract
The invention relates to a light source based on fluorescent powder for enhancing outgoing efficiency of mixed light and a method thereof, comprising an excitation light source (1) and a spectrophotometry filter (2). Excitation light can be divided to two pathways through transmission and reflection, one pathway is guided to an excited material (3) and is converted to excited light to be guided to a light source outgoing face, and the other pathway is guided to the light source outgoing face to be mixed with the excited light. The guide of the two pathways of light is completed respectively by a first reflecting face and a second reflecting face to obtain output of the mixed light with scheduled proportion and higher efficiency. The first reflecting face (4) can be made of head-conducting medium, and is tightly clung to the excited material (3). The excited material (3) can comprise a plurality of types, and is distributed according to zones of a rotation disc (5). The invention enhances the light source efficiency and has the advantages of convenient color design, long service life and low cost.
Description
Technical field the present invention relates to light source module, relates in particular to the light source module that excites based on fluorescent material, and particularly combination makes outgoing mixed light efficient higher light-source structure and method by element.
Background technology is since earlier 1990s, along with the new generation of semiconductor photoelectron material based on InGaA1P and InGaN develops rapidly, led light sources such as red, yellow, blue, green, the ultraviolet of various high power high luminances and white light emerge in large numbers one after another, emerge in an endless stream, obtained application more and more widely in various demonstrations and lighting field.
The method that obtains shades of colour light source (especially white light source) is except adopting the respective color light emitting diode, and the main technical schemes that can also adopt has RGB mixed light and fluorescence to change two kinds.Wherein, the fluorescence conversion plan is to be used to excite the light that makes fluorescent material produce longer wavelength from the emission light of other light source (such as but not limited to led chip).For example, the white light LEDs patent of Japanese Ri Ya company (Nichia) discloses and has utilized 470 nano blue light led chips to excite yellow YAG fluorescent material to send the technical scheme of white light.This scenario-frame is simple, low cost of manufacture, product have very strong practicality.
Application number is that 2005100720291 Chinese patent application discloses a kind of scheme that is obtained white light by the fluorescence conversion, fluorescent material is coated on the speculum, thereby separate with light emitting diode, the light that utilizes this speculum to make fluorescent material be inspired is penetrated by predetermined exit facet by reflection.In this scheme, the mixed light of the actual diffusion exciting light that is not absorbed by fluorescent material for stimulated luminescence and part of light source emergent light.Utilize the disclosed light-source structure of this scheme, only change fluorescent material composition or distribution proportion, can the color or the colourity of light source emergent ray be designed.Its weak point is: because the exciting light that has part not absorbed by fluorescent material may be by diffusion to excitation source, the diffusion of considerable part stimulated luminescence is also arranged toward described excitation source simultaneously, thereby these light are difficult to be fully utilized, and have reduced the efficient of light source mixed light output.Simultaneously, described exciting light is generally minimum toward the ratio of light source exit facet by diffusion, and is less than normal to the colourity influence of mixed light, is unfavorable for the adjustment design of light source colour or colourity.
The summary of the invention the technical problem to be solved in the present invention is at above-mentioned the deficiencies in the prior art, and a kind of light-source structure and method thereof are proposed, be convenient to make up the delivery efficiency that improves the light source mixed light, and then be convenient to the color or the colourity of light source emergent ray are designed with simple elements.
For solving the problems of the technologies described above, what this reality was invented is contemplated that substantially: use and select a beam split optical filter, and transmission simultaneously and reflection exciting light, thus described exciting light is divided into two-way, the one tunnel leads the past material of being excited, and lead toward the light source exit facet on another road; Reflecting surface by necessity guides this two-way light, wherein has one the tunnel to convert stimulated luminescence to through being excited material, thereby obtains predetermined ratio and the mixed light of higher delivery efficiency is arranged at the light source exit facet.
As one of technical scheme that realizes the present invention's design be, a kind of method based on fluorescent material raising mixed light outgoing efficient be provided, be used for light source, comprise step:
A. the included excitation source of this light source produces exciting light;
B. this light source be excited material layer included be excited material stimulated luminescence under the effect of described exciting light, with the light-emitting face of described stimulated luminescence guiding toward described light source;
C. with the light-emitting face of part exciting light guiding toward described light source;
D. this light source is exported mixed light;
Especially, also comprise in described steps A: select and a beam split optical filter is set, make described exciting light oblique fire to this beam split optical filter, be divided into two-way with mode of penetrating and reflection mode respectively, the one tunnel leads toward the described material of being excited and uses for step B; Use for step C on another road;
Also comprise in described step C: second reflecting surface is set, and with this beam split optical filter of exciting light reflected back of leading from described beam split optical filter, thereby this exciting light is divided into two-way again, and one the tunnel leads toward described excitation source, and the light-emitting face toward described light source is led on another road;
In described step B, also comprise: first reflecting surface is set, described stimulated luminescence is guided toward the same side, and led the light-emitting face of past described light source behind the described beam split optical filter that leads.
In the such scheme, in the described steps A, be the one tunnel described past described material of being excited of photoconduction that excites of deriving by described beam split optical filter with in the mode of penetrating; Correspondingly, stimulated luminescence described in the step B by this beam split optical filter with the lead light-emitting face of described light source of reflection mode.
In the such scheme, in the described steps A, be the one tunnel described past described material of being excited of photoconduction that excites of deriving by described beam split optical filter with in the reflection mode; Correspondingly, stimulated luminescence described in the step B by this beam split optical filter with the lead light-emitting face of described light source of the mode of penetrating.
In the such scheme, also comprise among the described step C: between the described beam split optical filter and second reflecting surface near or the position of being close to described second reflecting surface be provided with second and be excited material layer, be used for holding second and be excited material, thereby the exciting light that will lead from described beam split optical filter converts second stimulated luminescence to and leads past described beam split optical filter, replaces described exciting light to be directed the light-emitting face of past described light source.
As two of the technical scheme that realizes the present invention's design be, provide a kind of and improve the light source of mixed light outgoing efficient, comprise excitation source, be excited the material layer of being excited at material place based on fluorescent material; Be excited the first adjacent reflecting surface of material layer with this, make this stimulated luminescence of being excited material all be led the same side of past this first reflecting surface by reflection, especially, also comprise the beam split optical filter and second reflecting surface, described excitation source makes the excitation line oblique fire to this beam split optical filter in the face of described beam split optical filter; Described material layer and second reflecting surface of being excited splits in the both sides of described beam split optical filter, roughly just meeting the excitation line that comes to by this beam split optical filter guiding respectively.
In the such scheme, described beam split optical filter is arranged on described excitation source and described being excited between the material layer, in the mode of penetrating a part is led toward the described material of being excited from the excitation line of described excitation source, in the reflection mode another part is led toward described second reflecting surface from the excitation line of described excitation source simultaneously; This beam split optical filter also in the reflection mode with the described photoconduction that is stimulated of being excited material toward the light-emitting face of this light source, will lead light-emitting face from the part of the excitation line of described second reflecting surface reflection in the mode of penetrating simultaneously toward this light source.
In the such scheme, the light-emitting face of described excitation source and the described material layer of being excited are arranged on the same side of described beam split optical filter, intersect in twos on the plane at place separately, thereby described beam split optical filter is led a part toward the described material of being excited from the excitation line of described excitation source in the reflection mode, in the mode of penetrating another part is led toward described second reflecting surface from the excitation line of described excitation source simultaneously; This beam split optical filter also in the mode of penetrating with the described photoconduction that is stimulated of being excited material toward the light-emitting face of this light source, will lead light-emitting face from the part of the excitation line of described second reflecting surface reflection in the reflection mode simultaneously toward this light source.
In the such scheme, described light source comprises that also second is excited material layer, between the described beam split optical filter and second reflecting surface near or be close to described second reflecting surface.
In the such scheme, described first reflecting surface or second reflecting surface are made of heat-conducting medium, are close to the pairing material layer of being excited of this first reflecting surface or second reflecting surface.
In the such scheme, described light source also comprises the transparent light guide medium, is arranged on the one or both sides of described beam split optical filter.
In the such scheme, also comprising the described rotating disk of being excited material layer of carrying, is the center with the rotating shaft of this rotating disk, has at least two kinds to be excited material and to be distributed in the described material layer of being excited along the circumference subregion; Described first reflecting surface is fixed on this rotating disk, or is the card of described rotating disk.
Adopt above-mentioned each technical scheme, improved the outgoing efficient of mixed light, when light source can be exported more high brightness and power, have and be convenient to design colours, long service life, advantage that cost is low.
Description of drawings Fig. 1 is the structural principle schematic diagram of one of light source embodiment of the present invention;
Fig. 2 is the special case structural principle schematic diagram of Fig. 1 embodiment;
Fig. 3 is the relevant spectrum exemplary plot that Fig. 1 or Fig. 2 embodiment obtain white light,
Wherein curve a1 represents the spectrum of beam split optical filter, and curve a2 represents the spectrum of exciting light, and curve a3 represents the spectrum of stimulated luminescence;
Fig. 4 is two the structural principle schematic diagram of light source embodiment of the present invention;
Fig. 5 is the special case of Fig. 4 embodiment and improves the structural principle schematic diagram;
Fig. 6 is the relevant spectrum exemplary plot that Fig. 4 or Fig. 5 embodiment obtain blue green light,
Wherein curve d1 represents the spectrum of beam split optical filter, and curve d2 represents the spectrum of exciting light, and curve d3 represents the spectrum of stimulated luminescence;
Fig. 7 is that light source of the present invention is a kind of principle schematic of improving structure of example with Fig. 5
Fig. 8 is the relevant spectrum exemplary plot that the light source embodiment of another improvement structure of the present invention obtains white light
Wherein curve b1 represents the spectrum of beam split optical filter, and curve b2 represents the spectrum of exciting light, and curve b3 and b4 represent the spectrum of first and second stimulated luminescences respectively;
Label among above-mentioned each figure is: 1---excitation source; 2---the beam split optical filter; 3,3 '---be excited material/be excited material layer; 4---first reflecting surface; 5---second reflecting surface; 6---the transparent light guide medium; 7---rotating shaft.
Below the specific embodiment, the most preferred embodiment shown in is further set forth the present invention in conjunction with the accompanying drawings.
Based on the existing included step of light source: make the excitation source 1 of light source produce exciting light, shoot to and be excited material layer and make and be excited material 3 stimulated luminescences, this stimulated luminescence is led the light-emitting face toward described light source; To be excited part exciting light guiding that material 3 absorbs toward the light-emitting face of described light source, with described stimulated luminescence mixing output by described; The key of the inventive method is: select and be provided with a beam split optical filter 2, oblique fire is divided into two-way by mode of penetrating and reflection mode respectively to the described exciting light of this beam split optical filter 2, one the tunnel leads and shoots to the described material layer of being excited, another road does not offer the described material 3 of being excited and utilizes but led light-emitting face toward light source, can improve the mixed proportion of exciting light in the light source emergent light largely, thereby be convenient to adjust the color of output light source.In order to adapt to above-mentioned allocative decision to described exciting light, and make light-source structure simple as far as possible and compact, the inventive method also comprises step: second reflecting surface 5 is set, be used for to lead from described that this beam split optical filter 2 of road exciting light reflected back of being excited material 3 of not offering of described beam split optical filter 2, thereby this part exciting light is divided into two-way again, one the tunnel is led toward described excitation source 1, and another road is led the light-emitting face of past described light source and is used; First reflecting surface 4 is set, will be excited the stimulated luminescence guiding of material 3 scatterings toward the same side of this first reflecting surface 4 thereby be used for reflecting stimulated luminescence, and the light-emitting faces toward described light source is led in described beam split optical filter 2 backs of leading.
According to this method, light source of the present invention comprises excitation source 1 at least, be excited the material layer of being excited at material 3 places, and be excited the first adjacent reflecting surface 4 of material layer, make described stimulated luminescence of being excited material 3 all be led the same side toward this first reflecting surface 4 by reflection with this; Also comprise the beam split optical filter 2 and second reflecting surface 5, described excitation source 3 makes the excitation line oblique fire to this beam split optical filter 2 in the face of described beam split optical filter 2; Described material layer and second reflecting surface 5 of being excited splits in the both sides of described beam split optical filter 2, roughly just meeting the excitation line that comes to by these beam split optical filter 2 guiding respectively.Among the present invention, described excitation source can be a spot light, also can be area source.When described excitation source is spot light, for sake of convenience, if no special instructions, all replace the primary optical axis light of the exciting light of this spot light in this description with excitation line, described " just meeting to " refers to be orthogonality relation between the primary optical axis of light on plane and this plane of incident.
In the inventive method, distribute and occupation mode, should select simultaneously stimulated luminescence to be had the described beam split optical filter 2 of corresponding different optical characteristic according to difference to described two-way exciting light.Such as, when leading when being chosen as that road of deriving by described beam split optical filter 2 by the mode of penetrating toward described exciting light of being excited material 3, described stimulated luminescence should be by this beam split optical filter 2 with the lead light-emitting face of described light source of reflection mode, thereby selected beam split optical filter must have reflex to stimulated luminescence simultaneously.Conversely, when leading when being chosen as that road that reflection mode derived by described beam split optical filter 2 toward described exciting light of being excited material 3, described stimulated luminescence should be by this beam split optical filter 2 with the lead light-emitting face of described light source of the mode of penetrating, thereby selected beam split optical filter must have the transmission effect to stimulated luminescence simultaneously.
Light-source structure below by illustrated embodiment is further illustrated this.
One of structure embodiment of light source of the present invention as shown in Figure 1, described beam split optical filter 2 is arranged on described excitation source 1 and the described material/be excited between the material layer 3 of being excited, acceptance is from the oblique fire of the excitation line of described excitation source 1, and with the mode that penetrates will be wherein a part of excitation line lead toward described material/the be excited material layer 3 of being excited, in the reflection mode another part excitation line is led toward described second reflecting surface 5 simultaneously; Therefore, this beam split optical filter also will be in the reflection mode with the described photoconduction that is stimulated of being excited material 3 toward the light-emitting face of this light source, will lead light-emitting face from the part of the excitation line of described second reflecting surface 5 reflections in the mode of penetrating simultaneously toward this light source.
Fig. 2 is the special case of this Fig. 1 light-source structure.In this special case, the light-emitting face of described excitation source 1 and described plane almost parallel of being excited material layer 3 places roughly are 45 degree inclination angles with the plane at described beam split optical filter 2 places, thus with described second reflecting surface 5 quadrature roughly.The angle of this structure is provided with and will light is utilized, and makes light-source structure more compact.But the embodiment of Fig. 1 is convenient to according to the needs of actual size light source is set flexibly, and its saving grace is also arranged.
Fig. 3 embodiment has illustrated in above-mentioned Fig. 1 and Fig. 2 light-source structure to the selection of described beam split optical filter 2 characteristics.Curve a2 represents the spectrum of exciting light, is blue light; Curve a3 represents the spectrum of stimulated luminescence, for example select gold-tinted, use 00901 of (but be not limited to be) grand company in Taiwan, the spectrum of then described beam split optical filter 2 can be shown in curve a1, be designed to allow the incident light of shorter wavelength to pass through, the turning point of the logical characteristic of its ripple is in blue region, thus a reflection another part blue light transmissive part blue light time.Change the position of the logical characteristic turning point of this curve a1 ripple, can adjust the blue light ratio of transmission and reflection, thereby change blue light and gold-tinted mixed proportion, and then can design the white light that obtains different-colour at the light source exit end.
The structure embodiment of light source of the present invention two as shown in Figure 4: the light-emitting face of described excitation source 1 and the described material 3 of being excited are arranged on the same side of described beam split optical filter 2, intersect in twos on the plane at place separately, thereby described beam split optical filter 2 is led a part toward the described material 3 of being excited from the excitation line of described excitation source 1 in the reflection mode, in the mode of penetrating another part is led toward described second reflecting surface 5 from the excitation line of described excitation source 1 simultaneously; This beam split optical filter 2 also in the mode of penetrating with the described photoconduction that is stimulated of being excited material 3 toward the light-emitting face of this light source, will lead light-emitting face from the part of the excitation line of described second reflecting surface 5 reflections in the reflection mode simultaneously toward this light source.
Fig. 5 is the special case of this Fig. 4 light-source structure.Described excitation source 1 light-emitting face and described plane of being excited material 3 places be quadrature roughly, and the plane with described beam split optical filter 2 places roughly is 45 degree angles respectively, thus described excitation source 1 light-emitting face and described second reflecting surface, 5 almost parallels.
Fig. 6 embodiment has illustrated in above-mentioned Fig. 4 and Fig. 5 light-source structure to the selection of described beam split optical filter 2 characteristics.Wherein curve d2 represents the blue spectrum of exciting light, and curve d3 represents the green spectrum of stimulated luminescence; The spectrum of then described beam split optical filter 2 can be shown in curve d1, and being designed to can be by the incident light of longer wavelength, thus the transmissive green glow, and a reflection another part blue light transmissive part blue light time.Same change curve d1 ripple leads to the position of characteristic turning point, can influence the color or the colourity of outgoing mixed light by the ratio of adjusting blue light transmission and reflection.If suppose that as shown the transmission ratio of 2 pairs of blue lights of beam split optical filter described in this embodiment is 20%, then 80% blue light will be reflected and inspire gold-tinted toward fluorescent material in addition; And described 20% blue light that penetrates described beam split optical filter 2 is during by described this beam split optical filter 2 of second reflecting surface, 5 reflected backs, to there be the blue light of 20%*80%=16% to enter the light-emitting face of light source in the reflection mode, and 20%*20%=4% gets back to the blue light of described excitation source 1 in the mode of penetrating, and can be considered as the exciting light loss of light-source system.As seen, this loss can be very low, thereby light source of the present invention can provide higher mixed light outgoing efficient than prior art.In other words, under the prerequisite that is not less than existing mixed light outgoing efficient, light source of the present invention can be only by changing the color that described beam split optical filter 2 easily and in a big way changes emergent light.
In the light source of the present invention, when optical output power is big, can constitute described first reflecting surface 4, and make it to be close to described material/the be excited material layer 3 of being excited, spread the heat that produces on the fluorescent material in time, avoid gathering with heat-conducting medium.Can improve like this and be excited the light conversion efficiency of material, help simultaneously prolonging and be excited service life of material.Described heat-conducting medium thermal conductivity at room temperature can adopt metal (such as but not limited to aluminium) or thermal conductive ceramic more preferably greater than 10W/ (m.K) (watt/meter * degree Kelvin).This first reflecting surface 4 can also connect radiator, or is a surface of described radiator.According to the power designs of light-source system, can add auxiliary heat dissipation means such as exhaust fan in case of necessity, because of belonging to prior art, repeat no more.
In order further to reduce the loss of light, the inventive method can also in the one or both sides of described beam split optical filter, increase the transparent light guide medium in the various embodiments described above, described exciting light or stimulated luminescence are conducted.With Fig. 2 and transparent light guide medium shown in dotted lines in Figure 46 is example, can use glass prism (such as but not limited to triangular prism).Described beam split optical filter 2 is close in the side that this prism is set, and the light-emitting face or the described material 3 of being excited of excitation source 1 is close in the another side, or described second reflection 5, thereby this prism can play the effect of fiber waveguide in the transmission course of light.
What Fig. 7 had illustrated that light-source structure of the present invention can also implement improves one's methods, and is that example is improved (also being applicable to Fig. 4) with Fig. 5, and specifically: set up a rotating disk shown in dotted portion, what be used for carrying two or more is excited material 3 and 3 '.Especially can make these be excited material is the center with the rotating shaft 7 of this rotating disk, is distributed in the described material layer of being excited along the circumference subregion.Described first reflecting surface 4 can be the card of this rotating disk, or is fixed on the surface of the radiator on this rotating disk.Like this, on the one hand in having the light-source system of ventilating fan, the rotatablely moving of rotating disk can quicken to be excited the heat diffusion on the material; Another important aspect is, considers that fluorescent material has the extremely short simulated response time in the prior art, can think: along with the rotating disk rotation, when exciting light shines different stimulated luminescence materials, can obtain the stimulated luminescence of different colours.Select suitable can the reflection simultaneously or the beam split optical filter 2 of these two kinds of stimulated luminescences of transmission, then constantly in difference, the stimulated luminescence color that shoots to these beam split optical filter 2 same positions is constantly rotated, can make between the stimulated luminescence of output and realize uniform color mixture, and mix mutually with the part exciting light that is directed toward light-emitting face.An embodiment who utilizes this improvement structure to obtain white light source can be: exciting light is set to blue light; What the subregion distributed described first is excited material 3 and second and is excited material 3 ' and adopts green emitting phosphor and red fluorescence powder respectively, and green glow and ruddiness are stimulated; A selected described beam split optical filter 2 makes described blue light is had certain transmissivity, and described green glow and ruddiness are had the transmission effect, and then the emergent light of described light source is that the green glow of this beam split optical filter 2, the mixed white light of ruddiness are crossed in scheduled volume blue light and transmission.In this embodiment, can also add the 3rd and be excited material, yellow fluorescent powder for example, thus obtain the mixed white light that red, blue, green, yellow four colour cells become.
This improvement structure can also be carried out based on Fig. 1 and Fig. 2, only needs the characteristic of 2 pairs of described two or more stimulated luminescences of the described beam split optical filter of corresponding change, does not give unnecessary details at this.
Be excited material when having two kinds at least when what light source of the present invention comprised, except being excited the even mixed distribution of material at the described material layer of being excited with described two kinds, or outside the embodiment subregion distribution by above-mentioned improvement structure, it is also conceivable that being improved to that light source carries out: based on the light-source structure shown in Fig. 1,2,4 or 5, between the described beam split optical filter 2 and second reflecting surface 5, near or the position of being close to described second reflecting surface 5 be provided with second and be excited material layer, be used for holding second kind and be excited material; Utilize this second kind to be excited material and to convert the exciting light on this road to second stimulated luminescence, guide toward light-emitting face, mix with described first stimulated luminescence at least by selected suitable beam split optical filter 2.Fig. 8 is an example to carry out above-mentioned improved structure based on Fig. 4 or structure shown in Figure 5, has illustrated to obtain the correlation spectrum of an embodiment of white light source.Wherein curve b2 represents the spectrum of exciting light, for example is ultraviolet light; Curve b3 represents described first spectrum of stimulated luminescence of being excited material 3 (for example for yellow fluorescent powder), is yellow; Curve b4 represents described second spectrum of stimulated luminescence of being excited material (for example for blue colour fluorescent powder), is blueness; Curve b1 represents the spectral characteristic of described beam split optical filter 2, is chosen to be described ultraviolet light is had certain transmissivity, and described blue light is had reflex, and described gold-tinted is had the transmission effect; The emergent light of the described light source mixed white light of crossing the gold-tinted of this beam split optical filter 2 for the blue light that reflected by this beam split optical filter 2 and transmission then, this moment is owing to described second be excited the absorption of material to exciting light, make can return described excitation source 1 in the light source excite ultraviolet light very a small amount of, have the light loss consumption of system hardly.
Equally, change the characteristic of 2 pairs of two kinds of stimulated luminescences of described beam split optical filter, this improvement also is applicable to structure illustrated in figures 1 and 2, does not also give unnecessary details at this.In this improves structure, also can constitute described second reflecting surface, and make described second to be excited material layer and to be close to this second reflecting surface 5 with heat-conducting medium.This second reflecting surface 5 also can connect radiator, or is a surface of described radiator.
In having the light source module of structure of the present invention, described radiator also may be the thermal conductive shell of this light source module, and described first reflecting surface 4 or second reflecting surface 5 are the inwall of this shell, or the minute surface for being fixed on this shell or being provided with based on this outer casing inner wall.
Claims (18)
1. one kind is improved the light source of mixed light outgoing efficient based on fluorescent material, comprises excitation source (1), is excited the material layer of being excited at material (3) place; Be excited adjacent first reflecting surface (4) of material layer with this, make this stimulated luminescence of being excited material (3) all be led the same side toward this first reflecting surface (4) by reflection; It is characterized in that:
Also comprise beam split optical filter (2) and second reflecting surface (5), described excitation source (1) makes the excitation line oblique fire to this beam split optical filter (2) in the face of described beam split optical filter (2); Described material layer and second reflecting surface (5) of being excited splits in the both sides of described beam split optical filter (2), roughly just meeting the excitation line that comes to by this beam split optical filter (2) guiding respectively.
2. according to the described light source of claim 1, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
Described beam split optical filter (2) is arranged on described excitation source (1) and described being excited between the material layer, in the mode of penetrating a part is led toward the described material (3) of being excited from the excitation line of described excitation source (1), in the reflection mode another part is led toward described second reflecting surface (5) from the excitation line of described excitation source (1) simultaneously;
This beam split optical filter (2) also in the reflection mode with the described photoconduction that is stimulated of being excited material (3) toward the light-emitting face of this light source, will lead light-emitting face from the part of the excitation line of described second reflecting surface (5) reflection in the mode of penetrating simultaneously toward this light source.
3. according to the described light source of claim 2, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
The light-emitting face of described excitation source (1) and described plane almost parallel of being excited the material layer place roughly are 45 degree inclination angles with the plane at described beam split optical filter (2) place.
4. according to the described light source of claim 1, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
The light-emitting face of described excitation source (1) and the described material layer of being excited are arranged on the same side of described beam split optical filter (2), intersect in twos on the plane at place separately, thereby described beam split optical filter (2) is led a part toward the described material (3) of being excited from the excitation line of described excitation source (1) in the reflection mode, in the mode of penetrating another part is led toward described second reflecting surface (5) from the excitation line of described excitation source (1) simultaneously;
This beam split optical filter (2) also in the mode of penetrating with the described photoconduction that is stimulated of being excited material (3) toward the light-emitting face of this light source, will lead light-emitting face from the part of the excitation line of described second reflecting surface (5) reflection in the reflection mode simultaneously toward this light source.
5. according to the described light source of claim 4, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
Described excitation source (1) light-emitting face and described plane of being excited the material layer place be quadrature roughly, and the plane with described beam split optical filter (2) place roughly is 45 degree angles respectively.
6. according to the described light source of claim 1, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
Comprise that also second is excited material layer, between described beam split optical filter (2) and second reflecting surface (5) near or be close to described second reflecting surface (5).
7. according to claim 1 and 6 described light sources, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
Described first reflecting surface (4) or second reflecting surface (5) are made of heat-conducting medium, are close to this first reflecting surface (4) or the pairing material layer of being excited of second reflecting surface (5).
8. according to the described light source of claim 7, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
Described first reflecting surface (4) or second reflecting surface (5) connect radiator, or are a surface of described radiator.
9. the described according to Claim 8 light source based on fluorescent material raising mixed light outgoing efficient is characterized in that:
Described radiator is the thermal conductive shell of this light source module; Described first reflecting surface (4) or second reflecting surface (5) are the inwall of this shell, or the minute surface for being fixed on this shell or being provided with based on this outer casing inner wall.
10. according to each described light source of claim 1～5, it is characterized in that based on fluorescent material raising mixed light outgoing efficient:
Also comprise transparent light guide medium (6), be arranged on the one or both sides of described beam split optical filter (2).
11., it is characterized in that according to the described light source of claim 10 based on fluorescent material raising mixed light outgoing efficient:
Described transparent light guide medium (6) is the triangular glass column, is close to described beam split optical filter (2) with a side.
12., it is characterized in that according to the described light source of claim 1 based on fluorescent material raising mixed light outgoing efficient:
Also comprising the described rotating disk of being excited material layer of carrying, is the center with the rotating shaft (7) of this rotating disk, has at least two kinds to be excited material (3,3 ') and to be distributed in the described material layer of being excited along the circumference subregion; Described first reflecting surface (4) is fixed on this rotating disk, or is the card of described rotating disk.
13. the method based on fluorescent material raising mixed light outgoing efficient is used for light source, comprises step:
A. the included excitation source (1) of this light source produces exciting light;
B. this light source be excited material layer included be excited material (3) stimulated luminescence under the effect of described exciting light, with the light-emitting face of described stimulated luminescence guiding toward described light source;
C. with the light-emitting face of part exciting light guiding toward described light source;
D. this light source is exported mixed light;
It is characterized in that,
Also comprise in described steps A: select and a beam split optical filter (2) is set, make described exciting light oblique fire to this beam split optical filter (2), be divided into two-way with mode of penetrating and reflection mode respectively, the one tunnel leads toward the described material (3) of being excited, and uses for step B; Use for step C on another road;
In described step C, also comprise: second reflecting surface (5) is set, to lead this beam split optical filter (2) of exciting light reflected back from described beam split optical filter (2), thereby this exciting light is divided into two-way again, and one the tunnel leads toward described excitation source (1), and the light-emitting face toward described light source is led on another road;
In described step B, also comprise: first reflecting surface (4) is set, described stimulated luminescence is guided toward the same side, and the light-emitting face toward described light source is led in described beam split optical filter (2) back of leading.
14., it is characterized in that according to the described method of claim 13 based on fluorescent material raising mixed light outgoing efficient:
In the described steps A, be the one tunnel described past described material (3) of being excited of photoconduction that excites of deriving by described beam split optical filter (2) with in the mode of penetrating; Correspondingly, stimulated luminescence described in the step B by this beam split optical filter (2) with the lead light-emitting face of described light source of reflection mode.
15., it is characterized in that according to the described method of claim 13 based on fluorescent material raising mixed light outgoing efficient:
In the described steps A, be the one tunnel described past described material (3) of being excited of photoconduction that excites of deriving by described beam split optical filter (2) with in the reflection mode; Correspondingly, stimulated luminescence described in the step B by this beam split optical filter (2) with the lead light-emitting face of described light source of the mode of penetrating.
16., it is characterized in that according to the described method of claim 13 based on fluorescent material raising mixed light outgoing efficient:
Also comprise among the described step C: between described beam split optical filter (2) and second reflecting surface (5) near or the position of being close to described second reflecting surface (5) be provided with second and be excited material layer, be used for holding second and be excited material (3 '), thereby the exciting light that will lead from described beam split optical filter (2) converts second stimulated luminescence to and leads past described beam split optical filter (2), replaces described exciting light to be directed the light-emitting face of past described light source.
17., it is characterized in that according to claim 13 or 16 described methods based on fluorescent material raising mixed light outgoing efficient:
Described first reflecting surface (4) or second reflecting surface (5) are made of heat-conducting medium, are configured to be close to this first reflecting surface (4) or the pairing material layer of being excited of second reflecting surface (5).
18., it is characterized in that according to the described method of claim 13 based on fluorescent material raising mixed light outgoing efficient:
The described material (3) of being excited comprises at least two kinds, and the rotating shaft (7) that is configured to a rotating disk is the center, distributes along the circumference subregion.
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| CN2008100652601A CN101498415B (en) | 2008-01-30 | 2008-01-30 | Light source for improving mixing light emergent efficiency by fluorescent powder and method thereof |
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