CN102929086B - Light emitting device and related projection system - Google Patents
Light emitting device and related projection system Download PDFInfo
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- CN102929086B CN102929086B CN201210299786.2A CN201210299786A CN102929086B CN 102929086 B CN102929086 B CN 102929086B CN 201210299786 A CN201210299786 A CN 201210299786A CN 102929086 B CN102929086 B CN 102929086B
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Abstract
The embodiment of the invention discloses a light emitting device and a projection system. The light emitting device comprises a laser diode array, a wavelength conversion device and a light guiding system, wherein the laser diode array comprises a first laser diode and a second laser diode respectively emitting the first laser and the second laser; the wavelength conversion device is provided with wavelength conversion materials; a first surface of the wavelength conversion device is used for receiving laser; the wavelength conversion material is used for absorbing the laser to generate and emit simulated laser; the light guiding system comprises a first type of components and a second type of components which surround the first type of components; first guiding elements and second guiding elements in the first type of components respectively guide the first laser and the second laser to the first surface; the second type of components guide the emergent light on the first surface and are separated from a laser path; and the luminous flux of the emergent light guided by the second type of components is greater than that guided by the first type of components. The embodiment of the invention provides a light emitting device which separates most emergent light of the reflective wavelength conversion device from the path of laser entering the wavelength conversion device.
Description
Technical field
The present invention relates to illumination and display technique field, particularly relate to a kind of light-emitting device and relevant projecting system.
Background technology
LASER Light Source is the new type light source of a kind of high brightness, high collimation, and is applied to the every field such as illumination, projection gradually.Fig. 1 is a kind of light-emitting device comprising LASER Light Source that can be applied to illumination and projection field, and as shown in Figure 1, this light-emitting device 100 comprises LASER Light Source 110, lens 120, lens 130, optical filter 140, Wavelength converter 150, lens 160.Wherein, LASER Light Source 110 comprises diode laser matrix 111 and collimator lens array 112, emergent light outgoing after collimator lens array 112 collimates of diode laser matrix 111.The emergent light of collimator lens array 112 incides lens 130 and becomes directional light after lens 120 focus on, and is focused on Wavelength converter 150 after this directional light transmission filter 140 by lens 160.Wavelength converter 150 comprises material for transformation of wave length, and the laser of incidence can be converted to Stimulated Light and by it to lens 160 direction outgoing by it.The emergent light of Wavelength converter 160 after lens 160 are collected outgoing to optical filter 140 and by outgoing after the reflection of this optical filter.This light-emitting device 100 utilize LASER Light Source 110 emergent light that excitation wavelength conversion equipment 150 medium wavelength transition material can produce high brightness, but its problem is, for the light-emitting device needing fraction of laser light composition in emergent light, because light-emitting device 100 utilizes the different laser of optical filter 140 pairs of wavelength and Stimulated Light to carry out distinguishing light path, therefore it can not meet the requirement that emergent light comprises laser composition.On the other hand, because the light-emitting area of laser array is comparatively large, need to compress its outgoing beam, thus need to increase optical element, increase the volume of light-emitting device, be not suitable for some to the stricter occasion of the volume requirement of light-emitting device.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of light-emitting device with reflective Wavelength converter, and the light path of most of emergent light of Wavelength converter with the laser of this Wavelength converter incident can be separated by this light-emitting device.
Embodiments provide a kind of light-emitting device, it is characterized in that, comprising:
A kind of light-emitting device, is characterized in that, comprising:
Diode laser matrix, this diode laser matrix comprises the first laser diode and the second laser diode, respectively outgoing first laser and the second laser;
Be provided with the Wavelength converter of material for transformation of wave length, this Wavelength converter comprises first surface, this first surface is for receiving the first laser and the second laser, material for transformation of wave length absorbs this first laser and the second laser to produce Stimulated Light, and the mixed light of this Stimulated Light and unabsorbed laser is at least partly from this first surface outgoing;
Light guide system in light path between diode laser matrix and Wavelength converter, this light guide system comprises first kind assembly and is centered around the Equations of The Second Kind assembly around first kind assembly:
First kind assembly comprises the first induction element and the second induction element, the first surface of the first induction element for guiding the first laser to be incident to Wavelength converter, the first surface of the second induction element for guiding the second laser to be incident to Wavelength converter;
Equations of The Second Kind assembly is used for the part emergent light outgoing of the first surface of guide wavelength conversion equipment and is separated with laser optical path, and the luminous flux of the emergent light of the first surface of Equations of The Second Kind assembly guiding is greater than the emergent light luminous flux of the first surface that first kind assembly guides.
Present invention also offers a kind of optical projection system, this optical projection system comprises above-mentioned light-emitting device
Compared with prior art, the embodiment of the present invention has following beneficial effect:
In the embodiment of the present invention, laser is guided to be incident to the first surface of Wavelength converter to produce Stimulated Light by first kind assembly, because the optical extend of the emergent light of the first surface of Wavelength converter is larger than the optical extend of the laser of diode laser matrix outgoing, be incident upon diode laser matrix so the emergent light of the first surface of Wavelength converter not only can be guided out by first kind assembly and lose, the Equations of The Second Kind assembly that also can be centered around around first kind assembly guides outgoing as the emergent light of light-emitting device; Further, be greater than the luminous flux of the emergent light of the first surface that first kind assembly guides by the luminous flux of the emergent light controlling the first surface that Equations of The Second Kind assembly guides, thus the most of emergent light realizing Wavelength converter separates with the light path of the laser of this Wavelength converter incident.
Accompanying drawing explanation
Fig. 1 is the structural front view of an embodiment of light-emitting device in prior art;
Fig. 2 a is the structural representation of an embodiment of light-emitting device of the present invention;
Fig. 2 b is the partial structurtes schematic diagram of the light-emitting device shown in Fig. 2 a;
Fig. 3 a is the front view of another embodiment of light-emitting device of the present invention;
Fig. 3 b is the left view of the wavelength conversion layer of light-emitting device shown in Fig. 3 a;
Fig. 3 c is the front view of another embodiment of light-emitting device of the present invention;
Fig. 3 d is the wavelength conversion layer of the light-emitting device shown in Fig. 3 c and the left view of a kind of structure of filtering apparatus;
Fig. 3 e is the wavelength conversion layer of the light-emitting device shown in Fig. 3 c and the left view of another structure of filtering apparatus;
Embodiment
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Fig. 2 a is the structural representation of an embodiment of light-emitting device of the present invention, and as shown in Figure 2 a, light-emitting device 200 comprises diode laser matrix 210, light guide system 230, Wavelength converter 250.
Diode laser matrix 210 comprises the first laser diode 211 and the second laser diode 212, respectively outgoing first laser and the second laser.In the present embodiment, the first laser diode 211 and the second laser diode 212 are blue light laser diode.
Wavelength converter 250 is provided with material for transformation of wave length, here be specially yellow fluorescent powder, such as YAG fluorescent powder, 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.This Wavelength converter 251 comprises first surface 251a, this first surface 251a is for receiving the first laser and the second laser, simultaneously material for transformation of wave length absorbs the first laser and the second laser and outgoing Stimulated Light, and the mixed light of this Stimulated Light and laser is at least partly from this first surface 251a outgoing.
In the light path of light guide system 230 between diode laser matrix 210 and Wavelength converter 250, this light guide system 230 comprises first kind assembly 231 and is centered around the Equations of The Second Kind assembly 232 around first kind assembly 231: first kind assembly 231 comprises the first induction element 231a and the second induction element 231b, the first surface 251a of the first induction element 231a for guiding the first laser to be incident to Wavelength converter, the first surface 251a of the second induction element 231b for guiding the second laser to be incident to Wavelength converter, Equations of The Second Kind assembly 232 for the first surface 251a of guide wavelength conversion equipment the outgoing of part emergent light and be separated with the laser optical path inciding Wavelength converter, and the luminous flux of the emergent light of the first surface of Equations of The Second Kind assembly 232 guiding is greater than the luminous flux of the emergent light of the first surface that first kind assembly 231 guides.Particularly, in the present embodiment, the first kind assembly 231 of light guide system 230 is reflecting element group, first induction element 231a and the second induction element 231b is respectively the first reflecting element and the second reflecting element, and the first reflecting element 231a and the second reflecting element 231b receives the first laser and the second laser respectively and reflexed to the first surface 251a of Wavelength converter.The Equations of The Second Kind assembly 232 of light guide system 231 is for being centered around the first reflecting element 231a and the second reflecting element 231b ambient air medium 232, the part emergent light of the first surface of this air dielectric 232 transmission peak wavelength conversion equipment.
In addition, luminous flux for the emergent light ensureing the first surface that Equations of The Second Kind assembly 232 guides is greater than the luminous flux of the first surface that first kind assembly 231 guides, particularly, in the present embodiment, only need ensure that reflecting element group is less than the half of emergent light at the beam cross section area at this projecting plane place of Wavelength converter in the projected area of direction of beam propagation.
In the present embodiment, the laser guided by reflecting element group 231 is incident to the first surface 251a of Wavelength converter to produce Stimulated Light, because the optical extend of the emergent light of the first surface 251a of Wavelength converter is larger than the optical extend of the laser of diode laser matrix 210 outgoing, so the emergent light of the first surface 251a of Wavelength converter not only part can be guided out by reflecting element group and be incident upon diode laser matrix 210 direction and lose, also partly can be centered around reflecting element group 231 ambient air medium 232 guides outgoing as the emergent light of light-emitting device.Further, be less than the luminous flux being centered around the first surface that reflecting element group 231 ambient air medium 232 guides by the luminous flux of the emergent light controlling the first surface that reflecting element group 231 guides, thus the most of emergent light realizing Wavelength converter 250 separates with the light path of the laser of this Wavelength converter 250 incident.
What be worth explanation is a bit, in the present embodiment, diode laser matrix 210 only includes the first laser diode and the second laser diode, the first kind assembly of light guide system 230 only includes the first induction element and the second induction element accordingly, and in other embodiments of the present invention, diode laser matrix 210 can only include the laser diode of other quantity (as 3, more than 4 or 5), now the first kind assembly of light guide system 230 can only include the induction element of equal number, can realize the effect in the present embodiment too.
It is easily understood that the quantity of induction element that the first kind assembly of light guide system comprises is more, the directed element of Wavelength converter emergent light guides the light lost to diode laser matrix direction more.For this problem, the solution easily expected is: the laser of diode laser matrix outgoing is first carried out conjunction light and re-shoot to a light guide system, now only needs an induction element just can realize the laser aiming after by conjunction light to Wavelength converter.But such scheme introduces inevitably needing the optical element closing the purposes such as light, collimation, and this will increase the size of light-emitting device greatly, is unfavorable for the miniaturization of its application product.And reduce the optical element used, reduce the volume of light-emitting device to greatest extent, also be one of important goal of the present invention, therefore in light-emitting device of the present invention, preferably, diode laser matrix only includes N number of laser diode, the first kind assembly of light guide system only includes N number of induction element accordingly, N for being more than or equal to 2 natural numbers, thus makes light-emitting device small volume, can as the light source of the micro devices such as handheld projector equipment.
The element that the first reflecting element 231a in the present embodiment and the second reflecting element 231b can reflect all light for small reflector etc., also can be the elements such as the optical filter that size is less, this optical filter can reflect blue and transmission gold-tinted, thus the yellow component in increase emergent light, improve the utilization ratio of light.Preferably, the first laser beam of the first laser diode 211 outgoing incides the surface of the first induction element 231 completely, and the surface area of this first induction element 231a is less than 1.5 times of the facula area of the first laser on this first induction element 231a.Particularly, in the present embodiment, in perfect condition, the surface area of induction element equals the facula area of the first laser on this induction element, and the surface area of such induction element is minimum, also minimum to the loss of Stimulated Light, and then whole system is most effective.But, consider and may not to mate between the first laser facula and the shape of the first reflecting element 231a in actual applications and the first laser diode 211 and the first reflecting element 231a exist alignment error separately, the area of induction element needs suitably to expand to ensure sufficiently high boot efficiency.Verify by experiment, when the surface area of the first induction element 231a approximates 1.5 times of the facula area of the first laser on this first induction element 231a, can ensure that boot efficiency is higher, also having taken into account whole system efficiency can not lose greatly and too very much because of the area of induction element simultaneously.Certainly, if form fit and allowance control is better, is less than 1.5 times and can obtains higher system effectiveness.
Preferably, in the present embodiment, light-emitting device 200 also comprises collimator lens array 220, this collimator lens array 220 comprises the first collimation lens 221 and the second collimation lens 222, this first collimation lens 221 and the second collimation lens 222 are between diode laser matrix 220 and light guide system 230, receive the first laser and the second laser respectively, and after being collimated, shine the first induction element 231a and the second induction element 231b of first kind assembly respectively.Laser is relative to the Stimulated Light of fluorescent powder, and its dispersion angle is less, but laser still has certain dispersion angle, and its dispersion angle is generally between 30 degree to 40 degree.The emergent light of diode laser matrix 210 can carry out collimating rear outgoing by collimator lens array 220, its emergent light is in the process propagated, hot spot does not expand, and correspondingly can reduce the size of induction element to raise the efficiency, and collimated light is convenient to the process of subsequent optical element.
Preferably, in this enforcement, first collimation lens 221 has certain focussing force, incides the first smooth induction element 231a, to reduce the facula area inciding the first smooth induction element surface for receiving the first laser and being adjusted to by the first laser after dispersion angle is less than or equal to 30 degree.Obviously, now the first smooth induction element just can adopt less area, reduces blocking wavelength conversion layer 251 emergent light, improves the utilization factor to emergent light.Simultaneously due to the effect that the first collimation lens 221 focuses on, form hot spot can become large thereupon after laser reflection on fluorescent powder, hot spot becomes conference and reduces the power density of exciting light thus improve fluorescent powder transformation efficiency.But when the focussing force of the first collimation lens 221 is crossed strong, the transfer efficiency of the first laser will be affected, therefore through experimental verification, the dispersion angle of the first laser adjusts to that to be less than or equal to 30 degree be the propagation efficiency that can not affect the first laser.It is easily understood that for the second collimation lens 222, can focus on the emergent light of the second laser diode 212 equally, also can realize similar effect.
In addition, structure due to laser diode comprises the larger thermal conductive substrate of area and dispels the heat, even if it is very near that the first laser diode 211 and the second laser diode 212 are arranged, also gap is had between the outgoing beam of its light-emitting window, therefore the first reflecting element 231a can also become notch cuttype to place with the second reflecting element 231b, the gap be used between compression first laser and the second laser.As shown in Figure 2 b, first reflecting element 231a and the second reflecting element 231b receives the first laser and the second laser respectively and reflects, first reflecting element 231a and the parallel placement of the second reflecting element 231b, on the reflection direction of light inciding this reflecting element group surface, the spacing of the first element 231a and the second element 231b equals the spacing of the light beam of the first laser and the second laser, and the first element 231a and the second element 231b projection in the direction in which have a limit close contact.Particularly, emergent light outgoing after collimation of laser diode is directional light, its width of light beam is a, spacing between first laser and the second laser is b, therefore the width of the exiting light beams of collimator lens array is 2a+b, the width of the first reflecting element 231a and the second reflecting element 231b is a, this the first reflecting element 231a and the second reflecting element 231b and incident light are in angle of 45 degrees, and the width of the emergent light of diode laser matrix light beam of outgoing after the reflection of reflecting element group becomes 2a, thus reduce the gap between the first laser and the second laser.In other embodiments, the angle of the first reflecting element and the second reflecting element and incident light can be other angle, and is only limitted to 45 degree.
In the present embodiment, Wavelength converter 250 comprises wavelength conversion layer 251, reflection horizon 252, drive unit 253.Material for transformation of wave length is arranged on wavelength conversion layer 251, and first surface is the surface of wavelength conversion layer 251 towards light guide system.Reflection horizon 252 is positioned on the second surface 251b of wavelength conversion layer 251, and this second surface 251b is the surface of the wavelength conversion layer 251 relative with first surface 251a.This reflection horizon 252 is specially high anti-aluminium flake, the light inciding second surface 251b can be reflected back first surface 251a, improves the utilization ratio of laser and Stimulated Light, and plays a supporting role to wavelength conversion layer 251 simultaneously.In other embodiment of the present invention, reflection horizon 252 also can be that other has the device of reflection function.
Drive unit 253 moves for driving wavelength conversion layer 251, this wavelength conversion layer 251 is acted on along predefined paths, with the problem avoiding laser long duration of action to raise in this wavelength conversion layer 251 temperature that the same position of wavelength conversion layer 251 causes with the hot spot making laser be formed on this wavelength conversion layer 251.Particularly, in the present embodiment, drive unit 253 rotates for driving wavelength conversion layer 251, and the hot spot formed on this wavelength conversion layer to make laser acts on this wavelength conversion layer along predetermined circular path.Preferably, reflection horizon 252 is in the form of annular discs, and wavelength conversion layer 251 is in the ring-type concentric with this disk, and drive unit 253 is cylindrical motor, and drive unit 253 is coaxially fixed with reflection horizon 252 and wavelength conversion layer 251.In other embodiment of the present invention, drive unit also can drive wavelength conversion layer otherwise to move, such as horizontal reciprocating movement etc.But, when wavelength conversion layer 251 material for transformation of wave length can withstand higher temperatures, Wavelength converter 250 also can not arrange drive unit.
Preferably, in the present embodiment, light-emitting device 200 also comprises angular adjustment apparatus 240, and light adjusting gear 240 is specially lens, these lens are collected the emergent light of the first surface 251a of Wavelength converter and are reduced the dispersion angle of emergent light, and by emergent light outgoing to light guide system 230.In addition, the light that the reflecting element group 231 that these lens 240 can also receive light guide system 230 reflects back, and focus on the first surface of Wavelength converter, adjustment is incident on the spot size of first surface.In other embodiments, light adjusting gear 240 also can be CPC(CompoundParabolic Concentrator, composite parabolic gatherer) or the optical device that can reduce beam divergence angle of other form such as integrating rod.
In addition, the situation that emergent light for light-emitting device does not need blue light or needs the emergent light guided the Equations of The Second Kind assembly of light guide system to modify can be arrange a filtering apparatus (not shown in FIG.) to be positioned on the emergent light emitting light path of Equations of The Second Kind assembly guiding.Filtering apparatus comprises optical filter, receives emergent light also at least part of this emergent light of transmission of Equations of The Second Kind assembly.This filtering apparatus can under another drive unit drives, and synchronous with Wavelength converter by synchronous device.Preferably, filtering apparatus is coaxially connected on the same line with Wavelength converter, and under the driving of drive unit synchronous axial system, the two can realize accurate synchronous axial system, make the air dielectric of part emergent light transmission around reflecting element group of the first surface of wavelength rotary device, and incide the corresponding region of filtering apparatus.
Embodiment two
Fig. 3 a is the front view of another embodiment of light-emitting device of the present invention, as shown in Figure 3 a, light-emitting device 300 comprises diode laser matrix 310, Wavelength converter 320, apparatus for shaping 330, light guide system 340, angle regulator 360, Wavelength converter 350.
The difference of the light-emitting device in the present embodiment shown in light-emitting device and Fig. 2 is:
1, as shown in Figure 3 b, in the present embodiment, wavelength conversion layer 351 comprises ruddiness transition zone 351a, green glow transition zone 351b, blue light transition zone 351c, and these three transition zones are respectively arranged with red fluorescence powder, green emitting phosphor and scattering material.Ruddiness transition zone 351a and green glow transition zone 351b receives blue laser and the red Stimulated Light of outgoing and green Stimulated Light respectively, and blue light transition zone 351c receives laser and outgoing after scattering.Wavelength conversion layer 351 rotates under the driving of drive unit 352, makes on wavelength conversion layer 351 three transition zones receive the incidence of blue laser in turn.What deserves to be explained is, because the exit direction after laser is scattered is nondirectional, the optical extend of blue light transition zone 351c emergent light is by the optical extend of the laser much larger than incidence.
2, in the present embodiment, the first kind assembly 341 of light guide system 340 is light hole group, wherein the first induction element 341a is the first light hole, second induction element 341b is the second light hole, first light hole 341a and the second light hole 341b respectively transmission first laser and the second laser to the first surface 351d of Wavelength converter, Equations of The Second Kind assembly 342 is for being centered around the reflecting element around the first light hole 341a and the second light hole 341b, and the part emergent light of the first surface 351d of this reflecting element 342 reflection wavelength conversion equipment is also separated with laser optical path.
Similarly, by the guiding of light hole group 341, laser is incident to the first surface of Wavelength converter 350 to produce Stimulated Light, because the optical extend of the emergent light of the first surface of Wavelength converter 350 is larger than the optical extend of the laser of diode laser matrix 310 outgoing, be incident upon diode laser matrix direction so the emergent light of the first surface of Wavelength converter 350 not only can be guided out by light hole group 341 and lose, also outgoing can be guided as the emergent light of light-emitting device by reflecting element 342; Further, be greater than the luminous flux of the first surface that light hole 341 guides by the luminous flux of the emergent light controlling the first surface that reflecting element 342 guides, thus the most of emergent light realizing Wavelength converter 350 separates with the light path of the laser of this Wavelength converter 350 incident.
Preferably, light guide system also comprises the optical filter at covering first light hole place, this optical filter can transmit blue laser and reflect Stimulated Light and gold-tinted, therefore by arranging this optical filter, Stimulated Light in the emergent light of Wavelength converter 350 can not lose through light hole group, improve the utilization factor of Stimulated Light.Yes, the second light hole place arranges identical optical filter to easy understand too, to improve the utilization factor of Stimulated Light.
In the present embodiment, the plane of the shape of the reflecting element 342 of light guide system 340, it is simple that flat reflective element has structure, and the advantage that the volume that takes up room is little, is conducive to the miniaturization realizing light-emitting device.The luminous flux of the emergent light of the first surface guided for making reflecting element 342 is greater than the luminous flux of the first surface that light hole group 341 guides, and the area of light hole group 341 is less than the area that Wavelength converter emergent light is incident on reflecting element 342.In addition, the shape of the reflecting element 342 of light guide system 340 can also be free form surface, and the light to this reflecting element can reflex to a bit by the reflecting element of free form surface, is conducive to the collection of light, improves the utilization ratio of light.For free form surface, the dispersion angle of the Wavelength converter emergent light corresponding to light hole group is less than the dispersion angle of the Wavelength converter emergent light corresponding to reflecting element, just can ensure that the luminous flux of the emergent light of the first surface that reflecting element 342 guides is greater than the luminous flux of the first surface that light hole group 341 guides.In other embodiment of the present invention, the shape of the reflecting element of light guide system can also be a part for elliposoidal or elliposoidal, the incident light hot spot of wavelength conversion layer is positioned at a focus of elliposoidal, thus most of light of wavelength conversion layer outgoing through the reflective surface of elliposoidal reflection unit to another focus of this ellipsoid; Or, light directing arrangement is semisphere or a hemispheric part, and wavelength conversion layer is arranged at this spherical centre of sphere close a bit, thus most of light of wavelength conversion layer outgoing is through reflective surface another point extremely with this about centre of sphere symmetry of spheric reflection device, and carry out light collection at this point, wavelength conversion layer emergent light can be realized to guide outgoing the light path of laser separately.
3, in the present embodiment, light-emitting device 300 also comprises apparatus for shaping 330, this apparatus for shaping 330 is specially diffusion sheet, this diffusion sheet between collimator lens array 320 and light guide system 340 in light path, receive the first collimation lens 321 and the second collimation lens 322 emergent light and by outgoing after its shaping.Pass through shaping, first laser can carry out corresponding adjustment to the light spot shape of the second laser, and be adjusted to uniform hot spot simultaneously, such as when the first laser and the second laser incide the same position of wavelength conversion layer 351, namely the hot spot of the two overlaps, and the first laser can be adjusted to the shape identical with projection plane through diffusion sheet with the hot spot of the second laser; When the hot spot that the first laser and the second laser incide wavelength conversion layer 351 is adjacent, the hot spot of the first laser and the second laser can after diffusion sheet adjusts, and the first laser is identical with the shape of view field with the hot spot of the second Laser synthesizing.In addition, due to diffusion sheet 330 reception is collimated light, and the degree of divergence of the light beam after shaping does not have very large enhancing.In other embodiment of the present invention, apparatus for shaping can also be the device that lens curve array etc. has shaping operation.
Owing to there being the existence of blue light in the ruddiness transition zone of Wavelength converter and green glow transition zone, and then cause emergent light color not good, therefore preferably, as shown in Figure 3 c, light-emitting device can also comprise filtering apparatus 370, this filtering apparatus 370 is provided with optical filter, and filtering apparatus 370 receives the emergent light of Equations of The Second Kind assembly, and at least part of this emergent light of transmission.As shown in Fig. 3 c and 3d, filtering apparatus 370 is arranged on the cylindrical of wavelength conversion layer 351, with wavelength conversion layer 351 coaxial be connected and under the driving of drive unit 352 synchronous axial system.Filtering apparatus 370 comprises ruddiness filter area 370a, green glow filter area 370b, blue light filter area 370c, ruddiness transition zone 351a, green glow transition zone 351b, the blue light transition zone 351c of above-mentioned three regions difference corresponding wavelength conversion layer 351, and filtering apparatus 370 is identical with the angle of wavelength conversion layer 351 corresponding region.Three regions are provided with ruddiness optical filter, green glow optical filter and transparent section respectively.Such as, the Equations of The Second Kind assembly 342 of light guide system receives the part emergent light of the ruddiness transition zone 351a of wavelength conversion layer, and the ruddiness filter area guiding the light of outgoing to reflex to filtering apparatus by catoptron 380 filters it.Here be, by catoptron 380, the emergent light of the Equations of The Second Kind assembly 342 of light guide system is reflexed to filtering apparatus 370, in other embodiment of invention, also can utilize alternate manner that the emergent light of the Equations of The Second Kind assembly 342 of light guide system is guided to filtering apparatus, and the first kind assembly 342 in the present embodiment is not limited to the reflecting element of plane, it can be other shape.
In addition, in Fig. 3 d it is contemplated that the emergent light of reflecting element 342 other position of being also directed to filtering apparatus is incident.Such as, the part emergent light of Wavelength converter guides outgoing filtering apparatus 370 to surface to form hot spot by reflecting element 342 and catoptron 380, the line of the hot spot on this facula position and wavelength conversion layer is by the center of rotation of filtering apparatus and wavelength conversion layer, and the two is distributed in the both sides of this center of rotation, the now distribution of the regional of filtering apparatus and Wavelength converter as shown in Figure 3 e, ruddiness transition zone 351a and ruddiness filter area 370a places about spindle central symmetry, and the two angular distribution is identical, other the same corresponding setting in region, this structure can utilize the space of light-emitting device fully, it is one preferably mode.
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-emitting device, and this light-emitting device 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, Liquid Crystal Display) shadow casting technique, digital light path processor (DLP, Digital Light Processor) shadow casting technique.
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 (11)
1. a light-emitting device, is characterized in that, comprising:
Diode laser matrix, this diode laser matrix comprises the first laser diode and the second laser diode, respectively outgoing first laser and the second laser;
Be provided with the Wavelength converter of material for transformation of wave length, this Wavelength converter comprises first surface, this first surface is for receiving described first laser and the second laser, described material for transformation of wave length absorbs this first laser and the second laser to produce Stimulated Light, and the mixed light of this Stimulated Light and unabsorbed laser is at least partly from this first surface outgoing;
Light guide system in light path between described diode laser matrix and Wavelength converter, this light guide system comprises first kind assembly and is centered around the Equations of The Second Kind assembly around described first kind assembly:
Described first kind assembly comprises the first induction element and the second induction element, described first induction element is incident to the first surface of described Wavelength converter for guiding described first laser, and described second induction element is incident to the first surface of described Wavelength converter for guiding described second laser;
Described Equations of The Second Kind assembly is for guiding the part emergent light outgoing of the first surface of described Wavelength converter and being separated with the described laser optical path inciding Wavelength converter, and the luminous flux of the emergent light of the first surface of Equations of The Second Kind assembly guiding is greater than the luminous flux of the emergent light of the first surface that first kind assembly guides.
2. light-emitting device according to claim 1, it is characterized in that: described first laser beam is incident to the surface of described first induction element completely, and the surface area of this first induction element is less than 1.5 times of the facula area of described first laser on this first induction element.
3. light-emitting device according to claim 1, it is characterized in that: the first kind assembly of described light guide system is reflecting element group, described first induction element and the second induction element are respectively the first reflecting element and the second reflecting element, described first reflecting element and the second reflecting element receive described first laser and the second laser respectively and are reflexed to the first surface of described Wavelength converter, the Equations of The Second Kind assembly of described light guide system is for being centered around described first reflecting element and the second reflecting element ambient air medium, the part emergent light of the first surface of Wavelength converter described in this air dielectric transmission.
4. light-emitting device according to claim 3, it is characterized in that: described first reflecting element and the second reflective element parallel are placed, on the reflection direction of light inciding this reflecting element group surface, the spacing of described first element and the second element equals the spacing of the light beam of described first laser and the second laser, and described first element and the projection in the direction in which of the second element have a limit close contact.
5. light-emitting device according to claim 1, it is characterized in that: the first kind assembly of described light guide system is light hole group, wherein the first induction element is the first light hole, second induction element is the second light hole, described first light hole and the second light hole respectively the first laser described in transmission and the second laser to the first surface of described Wavelength converter, Equations of The Second Kind assembly is be centered around the reflecting element around described first light hole and the second light hole, and described reflecting element reflects the part emergent light of described first surface and is separated with described laser optical path.
6. light-emitting device according to claim 5, is characterized in that: described light guide system also comprises the optical filter of covering first light hole, and this filter transmission first laser also reflects Stimulated Light.
7. light-emitting device according to claim 5, is characterized in that: described reflecting element is plane.
8. light-emitting device according to claim 1, it is characterized in that: described light-emitting device also comprises collimator lens array, this collimator lens array comprises the first collimation lens and the second collimation lens, this first collimation lens and the second collimation lens, between described diode laser matrix and described light guide system, are respectively used to receive described first laser and the second laser and the first induction element and the second induction element that shine described first kind assembly after being collimated respectively.
9. light-emitting device according to claim 8, is characterized in that: described first collimation lens has focussing force, for the dispersion angle of described first laser is adjusted to be less than or equal to 30 degree after outgoing.
10. light-emitting device according to claim 1, it is characterized in that: described Wavelength converter also comprises drive unit and filtering apparatus, described filtering apparatus receives the emergent light of described Equations of The Second Kind assembly, and at least part of this emergent light of transmission, described filtering apparatus and Wavelength converter be coaxially connected and under the driving of described drive unit synchronous axial system.
11. 1 kinds of optical projection systems, is characterized in that, comprise the light-emitting device according to any one of claim 1 to 10.
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| CN201210299786.2A CN102929086B (en) | 2012-08-22 | 2012-08-22 | Light emitting device and related projection system |
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| CN201210299786.2A CN102929086B (en) | 2012-08-22 | 2012-08-22 | Light emitting device and related projection system |
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