CN102890398A - Light-emitting device and related projection system - Google Patents
Light-emitting device and related projection system Download PDFInfo
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- CN102890398A CN102890398A CN2012103670735A CN201210367073A CN102890398A CN 102890398 A CN102890398 A CN 102890398A CN 2012103670735 A CN2012103670735 A CN 2012103670735A CN 201210367073 A CN201210367073 A CN 201210367073A CN 102890398 A CN102890398 A CN 102890398A
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Abstract
The embodiment of the invention discloses a light-emitting device and a projection device. The light-emitting device comprises an excitation light source, a wavelength conversion device, a light collection device and a polarizing beam splitting device, wherein the excitation light source is used for emitting excitation light; the wavelength conversion device is used for receiving the excitation light and emitting excited light or the excited light and unabsorbed excitation light; the light collection device is used for collecting emergent light of the wavelength conversion device and emitting the emergent light from a light path which is separated from a light path of the excitation light; the polarizing beam splitting device is used for receiving the emergent light of the light collection device, transmitting light in a first polarization state and reflecting light in a second polarization state back to the light collection device; the light collection device can also be used for receiving reflected light of the polarizing beam splitting device and guiding the reflected light to a light emergent face of the wavelength conversion device; and the incident position of the reflected light on the light emergent face is the same as the emergent position of the emergent light of the wavelength conversion device. According to the embodiment of the invention, the light-emitting device which considers the technological requirements of the wavelength conversion device, the rotation stability and the brightness of the emergent light of the light-emitting device is provided.
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
Optical projection system in the market comprises three classes: DLP (Digital Light Processing substantially, the numeral light path is processed) optical projection system, LCD (liquid crystal display, liquid crystal display) optical projection system and LCOS (Liquid Crystal on Silicon, liquid crystal on silicon) optical projection system.Wherein, LCD optical projection system and LCOS optical projection system all need the emergent light of light source outgoing polarized light or light source to be converted to polarized light and just can be used for projection.
Fig. 1 is the structural representation of a kind of light-emitting device that can the outgoing polarized light in the prior art, and as shown in Figure 1, light-emitting device comprises light source 110, Wavelength converter 120, light splitting device 130, drive unit 140.Light source 110 outgoing exciting light L1, Wavelength converter 120 comprises material for transformation of wave length, and material for transformation of wave length absorbs exciting light L1 to produce Stimulated Light.The mixed light L2 of Stimulated Light and unabsorbed exciting light is from Wavelength converter 120 outgoing to light splitting device 130.Wherein, Wavelength converter 120 rotates under the driving of drive unit 140, to reduce the working temperature of Wavelength converter.Light splitting device 130 is understood the p polarized light L3 in the transmission incident lights and is reflected s polarized light L4, wherein s polarized light L4 is incident to again Wavelength converter 120 and is scattering into nonpolarized light by material for transformation of wave length, this nonpolarized light can incide light splitting device 130 again, thereby repeatedly circulation is so that light splitting device 130 outgoing p polarized light L3.
But the shortcoming of the light-emitting device of prior art is: because the emergent light of material for transformation of wave length has the full angle outgoing, this emergent light can spread in the process of propagating, light splitting device is enough near with the distance on the surface of Wavelength converter emergent light, could receive as much as possible the emergent light of Wavelength converter and change, this just has quite high requirement to technological requirement and the rotational stability of Wavelength converter.But in the prior art, Wavelength converter can be under the driving of drive unit high-speed rotation, the distance of light splitting device and Wavelength converter is difficult to accomplish very near, the hot spot that can cause light splitting device reflects in the light cyclic process polarized light to be incident on the Wavelength converter enlarges, cause brightness to reduce, and the degree that hot spot enlarges is very sensitive to the distance of light splitting device and Wavelength converter, and distance is far away, and the degree that hot spot enlarges is larger.Therefore in the prior art, exist contradiction between the brightness of the emergent light of the technological requirement of Wavelength converter, rotational stability and light-emitting device.
Summary of the invention
The technical matters that the present invention mainly solves provides a kind of light-emitting device and relevant projecting system, can take into account simultaneously the brightness of emergent light of technological requirement, rotational stability and the light-emitting device of Wavelength converter.
The embodiment of the invention provides a kind of light-emitting device, it is characterized in that, comprising:
Excitation source, this excitation source is used for the outgoing exciting light;
The Wavelength converter that comprises material for transformation of wave length, material for transformation of wave length is used for absorbing exciting light to produce Stimulated Light, this Wavelength converter is used for receiving exciting light, and at least part of light in the mixed light of at least part of Stimulated Light of outgoing or this Stimulated Light and unabsorbed exciting light;
Light collecting device, on the light path between Wavelength converter and the light splitting device, be used for to collect the emergent light of Wavelength converter, and with this emergent light from the emitting light path outgoing, and this emitting light path is separated with the light path that incides the exciting light of Wavelength converter;
Light splitting device be used for to receive the emergent light of light collecting device, and with the light transmission of the first polarization state in this emergent light, simultaneously with the light reflected light gathering-device of the second polarization state in this incident light;
Light collecting device also be used for to receive the light of the second polarization state of the reflection of light splitting device, and the light of this second polarization state is guided on the light-emitting face of emergent light of Wavelength converter, the position that the light of this second polarization state is incident on the light-emitting face is identical with the outgoing position of the emergent light of Wavelength converter.
The present invention also provides a kind of optical projection system, and this light-source system comprises above-mentioned light-emitting device.
Compared with prior art, the embodiment of the invention has following beneficial effect:
In the present embodiment, the emergent light of Wavelength converter is collected into light splitting device through light collecting device, the light of the second polarization state of light splitting device reflection is reflected back the wavelength conversion equipment through this light collecting device again, and the position that the light of the second polarization state is incident on the light-emitting face of Wavelength converter is identical with the outgoing position of the emergent light of Wavelength converter, therefore the hot spot on the Wavelength converter and the hot spot on the light splitting device can not enlarge in the process of circulation, thereby can avoid brightness to reduce.Because hot spot can not enlarge, so do not need the distance of requirement Wavelength converter and light collecting device very near, therefore can too high requirement not arranged to technological requirement and the job stability of Wavelength converter in the process of circulation yet.
Description of drawings
Fig. 1 is the structural representation of an embodiment of light-emitting device in the prior art;
Fig. 2 is the structural representation of an embodiment of embodiment of the invention light-emitting device;
Fig. 3 is another structural representation of embodiment of the invention light-emitting device;
Fig. 4 a is another structural representation of embodiment of the invention light-emitting device;
Fig. 4 b is another structural representation of light-emitting device in Fig. 4 a illustrated embodiment;
Fig. 5 is another structural representation of embodiment of the invention light-emitting device;
Fig. 6 is another structural representation of embodiment of the invention light-emitting device.
Embodiment
Below in conjunction with drawings and embodiments the embodiment of the invention is elaborated.
Embodiment one:
Fig. 2 is a kind of structural representation of embodiment of the invention light-emitting device, and as shown in Figure 2, light-emitting device 200 comprises excitation source 210, Wavelength converter 220, light collecting device 230, light splitting device 240.
What light splitting device 240 was used for receiving light collecting device 230 is excited emergent light L2, and this is excited the light L3 transmission of the first polarization state among the emergent light L2, simultaneously with light (not shown in FIG.) the reflected light gathering-device 230 of the second polarization state in this incident light.In the present embodiment, light splitting device is specially reflective polarizer, such as wire grid polarizers, the black type polarizer of courage etc., and wherein reflective polarizer is simple in structure, and is insensitive to the angle of incident light, is a kind of preferred device.
Particularly, for realizing that light splitting device 240 and the exiting surface of Wavelength converter 220 lay respectively on a pair of conjugate plane, light collecting device 230 can be imaging optical system, the collecting lens group in the present embodiment for example, the light-emitting face that collecting lens group 230 is collected Wavelength converters be second surface 220b be excited emergent light L2, and this is excited emergent light L2 focuses on a bit, the incidence surface of light splitting device 240 is positioned on this aspect, and this moment, light splitting device 240 laid respectively on a pair of conjugate plane with the exiting surface of Wavelength converter 220.The Wavelength converter that is positioned at object plane is excited the emergent light hot spot and is positioned at a pair of conjugate plane with the launching spot that is positioned at the light splitting device surface of image planes, according to optical imaging concept, from the reflected light on the surface of the light splitting device of image planes inevitable and Wavelength converter in the position of the light-emitting face that returns Wavelength converter to be excited the outgoing position of emergent light identical.In other embodiment of the present invention, light collecting device 230 can also be other device with focal imaging effect.
Compared with prior art, in the present embodiment, the emergent light L2 of Wavelength converter 220 is collected into light splitting device 240 through light collecting device 230, the light of the second polarization state of light splitting device 240 reflections is reflected back wavelength conversion equipment 220 through this light collecting device 230 again, and the position that the light of the second polarization state is incident on the light-emitting face of Wavelength converter 220 is identical with the outgoing position of the emergent light L2 of Wavelength converter 220, therefore the hot spot on the Wavelength converter and the hot spot on the light splitting device can not enlarge in the process of circulation, thereby can avoid brightness to reduce.Because hot spot can not enlarge, so do not need the distance of requirement Wavelength converter and light collecting device very near, therefore can too high requirement not arranged to technological requirement and the job stability of Wavelength converter in the process of circulation yet.
In the present embodiment, Wavelength converter 220 comprises wavelength conversion layer 221, substrate 222.Wavelength conversion layer 221 comprises material for transformation of wave length.Material for transformation of wave length is specially gold-tinted fluorescent powder, YAG fluorescent powder for example, and it can absorb the Stimulated Light of blue light and stimulated emission yellow.Material for transformation of wave length may be the material that quantum dot, fluorescent dye etc. have wavelength conversion capability also, is not limited to fluorescent powder.Substrate 222 is clear glass, can play a supporting role to wavelength conversion layer 221.Preferably, the surface of substrate 222 arranges one deck filter coating, and this filter coating can transmit blue and reflected yellow Stimulated Light, can improve the utilization factor of Stimulated Light; Further, the blue light that filter coating can the incident of transmission low-angle and reflect the blue light of yellow Stimulated Light and wide-angle can again excite the long conversion layer 221 of blu-ray reflection echo from the wide-angle of wavelength conversion layer 221 reflections, thereby raises the efficiency.But in the situation that the rigidity of wavelength conversion layer enough (for example wavelength conversion layer forms by fluorescent powder is entrained in the clear glass) own, substrate is omissible, can be plated in filter coating the surface of wavelength conversion layer this moment, has equally identical effect.
In the present embodiment, light-emitting device 200 also comprises drive unit 223, drive unit 223 is used for driving wavelength conversion layer 221 and substrate 222 motions, so that exciting light L1 acts on this wavelength conversion layer 221 at the hot spot that this wavelength conversion layer 221 forms along predefined paths, the problem that raises with this wavelength conversion layer temperature of avoiding the exciting light long duration of action to cause in the same position of wavelength conversion layer 221.Particularly, in the present embodiment, drive unit 223 is used for driving wavelength conversion layer 221 and rotates with substrate 222, so that exciting light acts on this wavelength conversion layer 221 at the hot spot that this wavelength conversion layer 221 forms along predetermined circular path.Preferably, substrate 222 is in the form of annular discs, and wavelength conversion layer 221 is the ring-type concentric with this disk, and drive unit 223 is cylindrical motor, and drive unit 223 is coaxial fixing with substrate 222.In other embodiment of the present invention, drive unit 223 also can drive wavelength conversion layer and otherwise move, such as horizontal reciprocating movement etc.In the material for transformation of wave length of wavelength conversion layer 221 can the situation of withstand higher temperatures, Wavelength converter 220 also can not arrange drive unit.
In the present embodiment, wavelength conversion layer 221 includes only a zone, and this region division has yellow fluorescent powder, and wavelength conversion layer 221 absorbs blue laser to produce yellow Stimulated Light, and this yellow Stimulated Light becomes the white light outgoing with unabsorbed blue light.In other embodiment of the present invention, wavelength conversion layer 221 can comprise zone more than two, at least one is provided with material for transformation of wave length in the zone more than two for this, and other zone can arrange the different material of function, such as the material for transformation of wave length of other kind or scattering material etc.For example, wavelength conversion layer 221 comprises Three regions, be respectively arranged with red fluorescence powder, green emitting phosphor and scattering material, red fluorescence powder and green emitting phosphor absorb respectively blue laser and produce ruddiness and green glow, scattering material receive blue laser and with its scattering with eliminating coherence after outgoing, so wavelength conversion layer 221 can red bluish-green three coloured light of outgoing.
In addition, because material for transformation of wave length always comprises the part exciting light to exciting Optical Absorption can not reach absolutely in the emergent light of wavelength conversion layer 221.Therefore, in other embodiment of the present invention, when not needing exciting light in the emergent light of light-emitting device, light-emitting device can also arrange filtering apparatus to be come the emergent light of wavelength conversion layer is filtered.Filtering apparatus comprises optical filter, can receive the emergent light of wavelength conversion layer, and filters out wherein at least part of exciting light.In the present embodiment, filtering apparatus can be arranged on the first surface of Wavelength converter, this filtering apparatus can the transmission Stimulated Light and the exciting light of low-angle incident, the exciting light of reflection wide-angle, and the exciting light composition in the Wavelength converter emergent light will reduce greatly.In addition, the optical filtering colour wheel can also be set, the optical filtering colour wheel can the transmission exciting light, the reflection Stimulated Light, and the optical filtering colour wheel rotates synchronously with Wavelength converter, can filter out the exciting light of Wavelength converter emergent light, and light-emitting device can an outgoing Stimulated Light at this moment.
Embodiment two:
Fig. 3 is another structural representation of embodiment of the invention light-emitting device, and as shown in Figure 3, light-emitting device 300 comprises excitation source 310, Wavelength converter 320, light collecting device 330 and light splitting device 340.
The light-emitting device of the present embodiment is from the difference of light-emitting device shown in Figure 2: the light collecting device of light-emitting device 300 330 is the lens different with light collecting device 230 effects in implemented, these lens 330 are adjusted into directional light with the emergent light of Wavelength converter 320, light splitting device 340 is perpendicular to the incident direction of this directional light, and the former road of this directional light is returned.The lens here are adjusted to directional light with incident light and it are vertically shone on the incidence surface of light splitting device 340, and the light that can realize equally the second polarization state of polarization spectro sheet 340 reflection is incident on position on the light-emitting face of Wavelength converter 320 with to be excited the outgoing position of emergent light L2 identical.With respect to embodiment shown in Figure 2, lens 330 in the present embodiment are that the emergent light with fluorescent powder is adjusted into directional light, therefore what the curvature of lens 330 did not need to design is very large, it is relatively easy to make, in addition, 340 of polarization spectro sheets need to keep its exiting surface directional light vertical and incident to get final product, and position accuracy demand is not high, relatively more easily regulates.In other embodiment of the present invention, light collecting device 330 can also be the combination that tulip lens etc. have optical element or the optical element of collimating effect.
Embodiment three:
Fig. 4 a is another structural representation of embodiment of the invention light-emitting device, and shown in Fig. 4 a, light-emitting device comprises excitation source 410, Wavelength converter 420, light collecting device 430 and light splitting device 440.The difference of the light-emitting device in the present embodiment and light-emitting device shown in Figure 2 200 is:
1) substrate 422 of Wavelength converter 420 is provided with the reflection horizon, and this reflection horizon is on the surface of contact between wavelength conversion layer 421 and the substrate 422, and the light that wavelength conversion layer 421 can be shone on this reflection horizon is reflected back first surface 420a.Part light in the mixed light of first surface 420a reception exciting light and emission parts Stimulated Light or Stimulated Light and unabsorbed exciting light.In the situation that the rigidity of wavelength conversion layer enough (for example wavelength conversion layer forms by fluorescent powder is entrained in the clear glass) own, substrate is omissible, this moment, the reflection horizon can be plated in the surface relative with first surface of wavelength conversion layer, had equally identical effect.In addition, in the situation that wavelength conversion layer medium wavelength transition material thickness is enough, also can not need to arrange the reflection horizon.In other embodiment of the present invention, substrate 422 also can be the hard material that high anti-aluminium sheet etc. has the highly reflective surface.
2) light collecting device 430 is the cambered surface reflection unit that comprises the reflecting surface 432 of light hole 431 and light hole outside, exciting light is incident on the wavelength conversion layer 421 through light hole 431, the major part of the emergent light of wavelength conversion layer 421 is by reflecting surface 432 reflections of cambered surface reflection unit and incided light splitting device 440, and fraction leaks from light hole 431.Cambered surface reflection unit 430 is the part of semielliptical shape or semielliptical shape, and wavelength conversion layer 421 is arranged at a focus of this ellipsoid, light splitting device 440 is positioned at another focus, thereby most of light of wavelength conversion layer outgoing reflexes to another focus of this ellipsoid through the reflecting surface of cambered surface reflection unit, namely light splitting device 440; Perhaps, cambered surface reflection unit 430 also can be semisphere or a hemispheric part, and wavelength conversion layer is arranged at the A point near this sphere centre of sphere, light splitting device is positioned at the B point, A and B are symmetrical about the centre of sphere, thereby most of light of wavelength conversion layer outgoing reflexes to light splitting device through the reflecting surface of cambered surface reflection unit, collects so that carry out light.Therefore, in the present embodiment, the emitting light path of wavelength conversion layer 421 emergent lights is through reflecting surface 432 reflections, the light path that incides the exciting light of wavelength conversion layer 421 then passes through light hole 431 transmissions, thereby realized the exciting light light path and be excited the separating of emergent light light path by arranging of curved reflectors.
In the present embodiment, curved reflectors is the light collecting device with a pair of conjugate plane of another kind of form.For curved reflectors, wavelength conversion layer and light splitting device are symmetric relation about its physical centre, optically have the character of conjugation.Therefore the reflected light that can realize equally light splitting device be incident on position and Wavelength converter on the light-emitting face of Wavelength converter to be excited the outgoing position of emergent light identical.In addition, light collecting device is not limited in the cambered surface reflection unit with light hole in the present embodiment, cambered surface reflection unit that in other embodiments also can be not with holes only needs from exciting light is got final product from the gap incident between cambered surface reflection unit and the Wavelength converter.
In the present embodiment, utilize the reflective Wavelength converter can be so that the structure of light-emitting device is compacter.Cambered surface reflection unit simple in structure, collection efficiency is higher, also has lower-cost advantage.
In other embodiment of the present invention, light collecting device can also be comprised of plural parts.Fig. 4 b is another structural representation of light-emitting device in Fig. 4 a illustrated embodiment, shown in Fig. 4 b, light collecting device 430 comprises square rod 432, curved reflectors 431, square rod 432 is on the light path between curved reflectors 431 and the light splitting device 440, curved reflectors 431 comprises a light hole and is centered around this light hole reflecting surface on every side, light hole is used for the transmission exciting light to the first surface of Wavelength converter, the emergent light of the first surface of reflecting surface collection Wavelength converter also is collected into a bit, the incident light plane of square rod 432 is positioned on this aspect, be used for receiving the emergent light of curved reflectors 431, and with this emergent light outgoing to polarization spectro element 440, square rod 432 also is used for the light of the second polarization state of reception polarization spectro element 440 reflections, and guides the light of this second polarization state to be incident to curved reflectors 431.Square rod 432 is specially the taper square rod, and the incidence surface of taper square rod 432 is positioned on the convergent point of emergent light of curved reflectors 431, and light splitting device 440 is near the exiting surface of taper square rod 432 and parallel with this exiting surface.The emergent light of light collecting device 431 is incident to light splitting device 440 behind taper square rod 432, the light of the second polarization state wherein can be polarized light-dividing device 440 reflections, because exiting surface and the incidence surface of taper square rod 432 are a pair of conjugate plane, come recovering light path identical in the taper square rod 432, the light of the second polarization state still can be back to the outgoing position of Wavelength converter 420 emergent lights.In the present embodiment, the taper square rod can also be spared light to the emergent light of Wavelength converter, and can also reduce the lighting angle of this emergent light so that the shape of the shape of this emergent light hot spot and projection screen is more approaching, improves transfer efficiency.In other embodiment of the present invention, square rod can also be excellent with other formal integral, CPC (Compound Parabolic Concentrator, the composite parabolic gatherer) etc. the device that has a pair of conjugate plane, namely inside comes the identical device of recovering light path to replace, and only need be arranged on the light path between Wavelength converter and the light splitting device to get final product.
Embodiment four
Fig. 5 is another structural representation of embodiment of the invention light-emitting device, and as shown in Figure 5, light-emitting device comprises excitation source 510, Wavelength converter 520, light collecting device 530 and light splitting device 540.The difference of light-emitting device is shown in light-emitting device in the present embodiment and Fig. 4 a: light collecting device 530 comprises catoptron with holes 531 and lens 532, this light collecting device 530 can be adjusted to directional light with the emergent light of Wavelength converter 520, and makes it impinge perpendicularly on light splitting device.Particularly, the through hole that exciting light sees through catoptron 531 incides lens 532, and lens 532 focus to exciting light the first surface 520a of Wavelength converter 520.The emergent light of Wavelength converter 520 is incident to lens 532 and is adjusted to directional light, and be incident to reflective mirror with holes 531, reflective mirror with holes 531 and the directional light slant setting that forms an angle, this directional light can be reflexed to light splitting device 540, realize that the emitting light path of emergent light of Wavelength converter 520 and the light path that exciting light is incident to Wavelength converter 520 are separated.The directional light vertical incidence is to light splitting device 540, can be polarized light-dividing device 540 reflections and returns along original optical path.In the present embodiment, on the basis of the cramped construction that utilizes reflective Wavelength converter, light collecting device 530 can be adjusted to directional light with the emergent light of Wavelength converter 520,540 of polarization spectro sheets need to keep its exiting surface directional light vertical and incident to get final product, position accuracy demand is not high, relatively more easily regulates.
When excitation source 510 comprises a plurality of light-emitting component, catoptron with holes 531 can be arranged a plurality of through holes corresponding one by one with light-emitting component, be incident in the through hole of catoptron 531 with holes after also the emergent light of a plurality of light-emitting components can being converged.Catoptron with holes also can replace with other material with reflection function, and for the ease of the processing through hole, preferably, catoptron can replace with the anti-aluminium sheet of height.In addition, the through hole of catoptron 531 with holes can also arrange optical filter, and this optical filter can the transmission exciting light and reflected Stimulated Light, thereby can improve the utilization ratio of Stimulated Light.
In addition, in the emergent light of light-emitting device, do not need in the situation of exciting light, catoptron with holes can replace with optical filter, this optical filter can the transmission exciting light and is reflected Stimulated Light, with respect to catoptron with holes, Stimulated Light can not lost from the through hole transmission, has improved the utilization ratio of Stimulated Light.In addition, optical filter can also have the effect that the spectrum of Stimulated Light is modified.
Embodiment five
Fig. 6 is another structural representation of embodiment of the invention light-emitting device, and as shown in Figure 6, light-emitting device comprises excitation source 610, Wavelength converter 620, light collecting device 630 and light splitting device 640.The difference of the light-emitting device in the present embodiment and light-emitting device shown in Figure 5 is: the light collecting device 630 in the present embodiment is the free form surface reflection horizon with light hole, this light hole is used for the transmission exciting light to the first surface 620a of Wavelength converter, the emergent light of the first surface 620a of Wavelength converter 620 can be collected in this free form surface reflection horizon, and this emergent light is adjusted to the vertical outgoing of directional light to the incident light plane of light splitting device 640.Compare with the light collecting device that catoptron with holes forms with lens, collection and the collimating effect of light just can be realized in the free form surface reflection horizon by an element, relatively simple for structure, but the collection area in free form surface reflection horizon is less, lower to the collection efficiency of the emergent light of Wavelength converter.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
The embodiment of the invention also provides a kind of optical projection system, comprises light-emitting device, and this light-emitting device can have structure and the function in the various embodiments described above.This optical projection system can adopt various shadow casting techniques, for example liquid crystal display (LCD, Liquid Crystal Display) shadow casting technique, digital light path processor (DLP, Digital Light Processor) shadow casting technique.
The above only is embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. a light-emitting device is characterized in that, comprising:
Excitation source, this excitation source is used for the outgoing exciting light;
The Wavelength converter that comprises material for transformation of wave length, described material for transformation of wave length is used for absorbing described exciting light to produce Stimulated Light, this Wavelength converter is used for receiving described exciting light, and at least part of light in the mixed light of at least part of described Stimulated Light of outgoing or this Stimulated Light and unabsorbed exciting light;
Light collecting device, on the light path between described Wavelength converter and the light splitting device, be used for collecting the emergent light of described Wavelength converter, and with this emergent light from the emitting light path outgoing, and this emitting light path is separated with the light path that incides the exciting light of described Wavelength converter;
Light splitting device is used for receiving the emergent light of described light collecting device, and with the light transmission of the first polarization state in this emergent light, simultaneously with the light reflected light gathering-device of the second polarization state in this incident light;
Described light collecting device also is used for receiving the light of the second polarization state of the reflection of described light splitting device, and the light of this second polarization state is guided on the light-emitting face of emergent light of described Wavelength converter, the position that the light of this second polarization state is incident on the described light-emitting face is identical with the outgoing position of the emergent light of described Wavelength converter.
2. light-emitting device according to claim 1, it is characterized in that, described Wavelength converter comprises wavelength conversion layer and reflection horizon, this wavelength conversion layer comprises relative first surface and second surface, described reflection horizon is arranged at the second surface of described wavelength conversion layer, be used for being reflected into exciting light or the Stimulated Light that is mapped to this reflection horizon, the first surface of described wavelength conversion layer is used for receiving described exciting light, and described first surface also is used at least part of light described light collecting device extremely of the mixed light of at least part of described Stimulated Light of outgoing or this Stimulated Light and unabsorbed exciting light.
3. light-emitting device according to claim 2, it is characterized in that: described light collecting device is curved reflectors, described curved reflectors comprises a light hole and is centered around this light hole reflecting surface on every side, described light hole is used for the described exciting light of transmission to the first surface of described Wavelength converter, described reflecting surface collect described Wavelength converter first surface emergent light and be collected into a bit, the incidence surface of described light splitting device is positioned on this aspect.
4. light-emitting device according to claim 2, it is characterized in that: described light collecting device comprises lens and plane reflection unit, described plane reflection device comprises through hole and is centered around this through hole reflection horizon on every side, described through hole is used for the described exciting light of transmission to the first surface of described Wavelength converter, outgoing was to described reflection horizon after described lens were adjusted to directional light for the emergent light of the first surface of collecting described Wavelength converter and with this emergent light, described reflection horizon is used for the directional light reflection of incident rear from the vertical outgoing of emitting light path to described light splitting device, and this emitting light path is separated with the input path that incides the exciting light of described Wavelength converter.
5. light-emitting device according to claim 2, it is characterized in that: described smooth adjusting gear is the free form surface reflection horizon that comprises with light hole, described light hole is used for the described exciting light of transmission to the first surface of described Wavelength converter, described reflecting surface is used for collecting the emergent light of the first surface of described Wavelength converter, and this emergent light is adjusted to the vertical outgoing of directional light to the incidence surface of described polarization spectro assembling device.
6. light-emitting device according to claim 1, it is characterized in that: described light collecting device comprises curved reflectors and square rod;
Described curved reflectors comprises a light hole and is centered around this light hole reflecting surface on every side, described light hole is used for the described exciting light of transmission to the first surface of described Wavelength converter, described reflecting surface collect described Wavelength converter first surface emergent light and be collected into a bit, the incidence surface of described square rod is positioned on this aspect;
Described square rod is used for receiving the emergent light of described light collecting device, and with this emergent light outgoing to described polarization spectro element, also be used for receiving the light of the second polarization state of described polarization spectro element reflects, guide the light of this second polarization state to be incident to described curved reflectors, and described square rod in come recovering light path identical.
7. light-emitting device according to claim 1, it is characterized in that, described Wavelength converter comprises relative first surface and second surface, described first surface is used for receiving described exciting light, and second surface is used at least part of light described light collecting device extremely of the mixed light of at least part of described Stimulated Light of outgoing or this Stimulated Light and unabsorbed exciting light.
8. light-emitting device according to claim 7, it is characterized in that, described light collecting device is lens, and these lens are used for collecting the emergent light of the second surface of described Wavelength converter, and this emergent light is adjusted to the vertical outgoing of directional light to the incidence surface of described light splitting device.
9. light-emitting device according to claim 1, it is characterized in that: described light splitting device is reflective polarizer.
10. an optical projection system is characterized in that, comprises such as each described light-emitting device in the claim 1 to 9.
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| CN105278226A (en) * | 2014-06-13 | 2016-01-27 | 中强光电股份有限公司 | Light source module and projection device |
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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. |