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CN203025471U - Light-emitting device and projection system - Google Patents

Light-emitting device and projection system Download PDF

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Publication number
CN203025471U
CN203025471U CN2012203859507U CN201220385950U CN203025471U CN 203025471 U CN203025471 U CN 203025471U CN 2012203859507 U CN2012203859507 U CN 2012203859507U CN 201220385950 U CN201220385950 U CN 201220385950U CN 203025471 U CN203025471 U CN 203025471U
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light
blue laser
wavelength conversion
wavelength
blue
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胡飞
杨佳翼
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Shenzhen Appotronics Corp Ltd
Shenzhen Appotronics Technology Co Ltd
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Shenzhen Yili Ruiguang Technology Development Co Ltd
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Priority to PCT/CN2012/084931 priority patent/WO2014023067A1/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Lasers (AREA)

Abstract

本实用新型提供了一种发光装置及投影系统，其特征在于，包括：用于出射蓝光激光该蓝光激光光源；包括波长转换层的波长转换装置，该波长转换层包括第一转换区，该第一转换区包括黄光波长转换材料或/和绿光波长转换材料，该第一转换区用于接收蓝光激光并将其部分转换为受激光，以出射所述受激光与未被转换的蓝光激光；第一滤光片，用于接收所述第一转换区出射的受激光与未被转换的蓝光激光，并将蓝光激光与部分受激光的混合光及剩余受激光分别沿两个方向出射为发光装置的两路出射光，使得蓝光激光和部分受激光的混合光的色坐标更接近于预定蓝光的色坐标。本实用新型实施例可以改善蓝光激光的色坐标更加接近预定色坐标，同时对剩余受激光进行利用。

Figure 201220385950

The utility model provides a light emitting device and a projection system, which is characterized in that it comprises: the blue laser light source for emitting blue laser; a wavelength conversion device including a wavelength conversion layer, the wavelength conversion layer includes a first conversion area, and A conversion region includes a yellow wavelength conversion material or/and a green wavelength conversion material, the first conversion region is used to receive blue laser light and convert part of it into converted light, so as to emit the converted light and unconverted blue laser light ; the first optical filter is used to receive the converted light emitted by the first conversion area and the unconverted blue laser, and emit the mixed light of the blue laser and part of the converted light and the remaining converted light in two directions respectively as The two outgoing lights of the light-emitting device make the color coordinates of the mixed light of the blue laser light and part of the received light closer to the color coordinates of the predetermined blue light. The embodiment of the utility model can improve the color coordinates of the blue laser to be closer to the predetermined color coordinates, and at the same time utilize the remaining laser light.

Figure 201220385950

Description

Light-emitting device and optical projection system
Technical field
The utility model relates to illumination and field of projection display, particularly relates to light-emitting device and relevant projecting system.
Background technology
At present, solid state light emitter is applied to illumination and demonstration field more and more widely.Utilize solid state light emitter to come excitated fluorescent powder to produce Stimulated Light and also become a kind of more and more general technical scheme as projection light source.The energy density of the solid state light emitters such as laser is high, so the exciting light brightness that its excitated fluorescent powder produces is high.But the blue light wavelength that general blue laser itself sends is between 440nm-460nm, and its chromaticity coordinates is about (0.15,0.016).In international digital television standard Rec709, the chromaticity coordinates of ethereal blue light is (0.15,0.06), and its predominant wavelength is 462nm.Therefore, when the blue laser light source was used for showing as the primary lights of projection, its chromaticity coordinates had certain gap with the chromaticity coordinates of Projection Display requirement, thereby easily affects the visual effect that optical projection system produces.
The utility model content
The technical problem underlying that the utility model solves is for projection light source improves a kind of blue light color coordinate closer to the predetermined color coordinate, and the light-emitting device that utilizes remaining Stimulated Light.
The utility model provides a kind of light-emitting device, it is characterized in that, comprising:
The blue laser light source, this blue laser light source is used for the outgoing blue laser;
Wavelength converter, this Wavelength converter comprises wavelength conversion layer, this wavelength conversion layer comprises the first transition zone, this first transition zone comprises the yellow wavelengths transition material or/and the green wavelength transition material, this first transition zone is used for receiving blue laser and this blue laser partly being converted to Stimulated Light, with outgoing Stimulated Light and the blue laser that is not converted;
The first optical filter, this first optical filter is used for receiving the Stimulated Light of the first transition zone outgoing and the blue laser that is not converted, and be the two-way emergent light of light-emitting device along the both direction outgoing respectively with the mixed light of blue laser and partially-excited light and residue Stimulated Light, make the chromaticity coordinates of mixed light of blue laser and partially-excited light closer to the chromaticity coordinates of predetermined blue light.
The utility model also provides a kind of optical projection system, it is characterized in that comprising above-mentioned light-emitting device.
With respect to prior art, the utility model utilizes the blue laser light source to come the excitation wavelength transition material to produce the mixed light of Stimulated Light and blue light, and utilize the first optical filter to carry out light splitting to this mixed light, make mixed light one tunnel outgoing of blue light and partially-excited light, and the residue Stimulated Light is from another road outgoing, wherein by the first optical filter can so that the chromaticity coordinates of the mixed light of blue light and partially-excited light closer to predetermined blue light color coordinate, simultaneously remaining Stimulated Light part also can be used for projection, can not cause the waste of energy of light source.
Description of drawings
Fig. 1 a is the front view of luminous device structure in an embodiment of the present utility model;
Fig. 1 b is right view and the front view of Fig. 1 a illustrated embodiment medium wavelength conversion layer structure;
Fig. 1 c is the cut off system of selection schematic flow sheet of the first optical filter in Fig. 1 a illustrated embodiment;
Fig. 1 d is the spectrogram of Fig. 1 a illustrated embodiment medium wavelength conversion layer emergent light;
Fig. 2 a is the front view of luminous device structure in another embodiment of the present utility model;
Fig. 2 b is the left view of Fig. 2 a illustrated embodiment medium wavelength conversion layer structure.
Embodiment
Below in conjunction with drawings and embodiments, the utility model embodiment is elaborated.
Embodiment one
Fig. 1 a is the front view of luminous device structure in an embodiment of the present utility model, Fig. 1 b is right view and the front view of the wavelength conversion layer 121 shown in Fig. 1 a, as shown in Figure 1a, light-emitting device comprises blue laser light source 110, Wavelength converter 120, the first optical filter 130, the second optical filters 140.
Blue laser light source 110 is used for outgoing blue laser 151.As shown in Fig. 1 a and Fig. 1 b, Wavelength converter 120 comprises wavelength conversion layer 121.Wavelength conversion layer 121 comprises relative first surface 121a and second surface 121b, first surface 121a receives blue laser 151 and its part is converted to Stimulated Light, and second surface is with mixed light 152 outgoing to the first optical filters 130 of this Stimulated Light with the blue laser that is not converted.As shown in Fig. 1 b, wavelength conversion layer 121 includes only the first transition zone zone, is provided with the yellow wavelengths transition material.The most frequently used material for transformation of wave length is fluorescent powder, as YAG fluorescent powder, can absorb blue laser and be excited to produce yellow Stimulated Light.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.In other embodiment of the utility model, the first transition zone 121 also can comprise the composite material of green wavelength transition material or green wavelength transition material and yellow wavelengths transition material.
Preferably, wavelength conversion layer 121 comprises scattering material.Because laser has the coherence, directly do not project on screen if do not eliminate its coherence, can produce bright spot on screen, cause the brightness irregularities of screen.The coherence who eliminates part blue laser 151 although fluorescent powder itself has certain scattering process, but its effect is limited, can not have good eliminating coherence effect, therefore, in wavelength conversion layer 121, scattering material is set, can eliminate better the coherence of blue laser 151, thereby guarantee the brightness uniformity of projection.Preferably, scattering material is evenly distributed in wavelength conversion layer 121, can play better eliminating coherence effect.
The first optical filter 130 receives the mixed light 153 of the mixed light 152 of yellow Stimulated Light and the blue laser that is not converted and reflect blue laser and the yellow Stimulated Light of part and transmission residue light 154, and be the two-way emergent light of light-emitting device along the both direction outgoing respectively with mixed light and the residue Stimulated Light of blue laser and the yellow Stimulated Light of part, make mixed light 153 chromaticity coordinatess of blue laser and part gold-tinted Stimulated Light closer to the chromaticity coordinates of predetermined blue light.In other embodiment of the utility model, the first optical filter 130 can be also the yellow Stimulated Light of transmissive portion and the yellow Stimulated Light of reflect blue laser and other parts does not affect the outgoing effect of light.
The chromaticity coordinates of blue laser and part gold-tinted Stimulated Light more has a variety of near the method for predetermined blue light color coordinate.Preferably, the wavelength of the cut off of the first optical filter more than or equal to 490nm less than or equal in the 520nm scope.The cut off wavelength here is in the relation curve of the transmitance of the first optical filter and wavelength, the 50% corresponding wavelength location in transmitance place of rising edge or negative edge.At present, the wavelength coverage of general blue laser is 440nm-460nm, its chromaticity coordinates is about (0.15,0.016), through experimental verification, the wavelength of the cut off of the first filter plate 130 is arranged in the 490nm-520nm scope, can so that the chromaticity coordinates of the mixed light of blue laser and part gold-tinted Stimulated Light more near predetermined blue light color coordinate.For example, through experimental verification, when the wavelength of the cut off of the first filter plate 130 is arranged on 490nm, the chromaticity coordinates of the mixed light of blue laser and the yellow Stimulated Light of part is (0.1582,0.0182), more near the chromaticity coordinates (0.152,0.061) of blue light in digital television standard Rec.709.The predominant wavelength of the predetermined blue light here is greater than the predominant wavelength of blue laser, the wavelength of the scope that covers due to the spectrum of gold-tinted is greater than the wavelength of the spectral range of blue laser, and the predominant wavelength of the mixed light of blue laser and part gold-tinted will be greater than the predominant wavelength of blue laser obviously.
In order to improve more accurately the chromaticity coordinates of blue laser, as shown in Fig. 1 c, preferably, the cut off position of the first optical filter 130 obtains by the following method:
A) spectrum of the emergent light of the first transition zone of acquisition wavelength conversion layer 121;
B) select the wavelength X of the i cut off of the first optical filter 130 i, and obtain the rear blue laser chromaticity coordinates (x corresponding with the spectrum of the mixed light 154 of partially-excited light of intercepting i, y i), wherein i is more than or equal to 1;
C) according to the chromaticity coordinates (x of predetermined blue light 0, y 0), obtain chromaticity coordinates (x i, y i) and chromaticity coordinates (x i, y i) between apart from d i
D) the wavelength base material at the i cut off increases a step-length, obtains the wavelength X of the i+1 cut off of the first optical filter 130 i+1, and obtain the rear blue laser chromaticity coordinates (x corresponding with the spectrum of the mixed light 154 of partially-excited light of intercepting i+1, y i+1);
E) obtain chromaticity coordinates (x i+1, y i+1) with chromaticity coordinates be (x 0, y 0) between apart from d i+1
F) compare d iWith d i+1If size is d i+1＞d i, the wavelength of selective cut-off point is λ iThe first optical filter 130 be required optical filter; If d i+1≤ d i, also comprise after this step:
Repeating step D, E is until d i＜d i+1, the wavelength of selective cut-off point is λ iThe first optical filter 130 be required optical filter.
During i=1, the wavelength X of the i cut off of the first optical filter 130 1Can choose greater than the blue laser wavelength coverage.The step-length here is the difference between wavelength corresponding to the cut off of the selection each time wavelength corresponding with the last cut off of selecting.Step-length can be selected according to actual conditions.
The below's blue laser in the present embodiment excites gold-tinted fluorescent powder to make a concrete analysis of as example:
In steps A, the spectrum of the blue laser of acquisition wavelength conversion layer 121 outgoing and the mixed light 151 of yellow exciting light, Fig. 1 d is the spectrum of the emergent light of wavelength conversion layer 121 shown in Fig. 1 a, the spectrum of blue laser approximately is distributed in the 440nm-455nm wavelength coverage, and the spectrum of yellow Stimulated Light approximately is distributed in the 470nm-730nm wavelength coverage.
In step B, select the wavelength X of the first cut off of the first optical filter 130 1, our the reference position 470nm wavelength of selecting the spectral range of yellow Stimulated Light is initial cut off wavelength here, the chromaticity coordinates (x of spectrum correspondence in chromatic diagram CIE1931 of intercepting this moment 1, y 1) be (0.1598,0.0150).In actual applications, the position of the first cut off wavelength can be selected according to actual conditions.
In step C, we select the chromaticity coordinates (0.152,0.061) of blue light in digital television standard Rec.709 to be the chromaticity coordinates (x of predetermined blue light 0, y 0), the blue laser after the first cut off intercepts and the chromaticity coordinates of the mixed light of the yellow exciting light of part and the distance between predetermined blue light color coordinate:
d 1 = ( x 1 - x 0 ) + ( y 1 - y 0 ) = ( 0.1598 - 0.152 ) + ( 0.0150 - 0.061 ) = 0.1171
Step D, the second cut off wavelength of selection the first optical filter 130, here, the second cutoff wavelength point that we choose is the 471nm position, the chromaticity coordinates that the spectrum of its intercepting is corresponding is (0.1598,0.0150).Step-length in the present embodiment is taken as 1nm, in other embodiments, step-length between the first cut off and the second cut off can be selected according to actual needs, be not limited to here for example, like this too for choosing of other cut off wavelength, and the step-length between different cut off wavelength can be not identical.
In step e, similarly, can obtain the chromaticity coordinates of mixed light of blue laser after the second cut off wavelength intercepting and the yellow exciting light of part and the distance between predetermined blue light color coordinate:
d d = ( x 2 - x 0 ) + ( y 2 - y 0 ) = ( 0.1598 - 0.152 ) + ( 0.0150 - 0.061 ) = 0.1171
In step F, compare d 1With d 2Size, obvious here, d 1=d 2, therefore need to continue selective cut-off point wavelength.
In step G, continue to choose the 3rd cut off wavelength, circulation step F.The chromaticity coordinates of the blue laser after the intercepting that finally the cut off wavelength of acquisition is corresponding and the mixed light of the yellow exciting light of part and the data of the distance between predetermined blue light color coordinate are as shown in table 1, can find to work as λ iDuring=507nm, d i＜d i+1
Wavelength x y d i Wavelength x y d i
470 0.1598 0.0150 0.1171 491 0.1580 0.0188 0.1048
471 0.1598 0.0150 0.1171 492 0.1577 0.0193 0.1032
472 0.1598 0.0150 0.1171 493 0.1575 0.0201 0.1007
473 0.1597 0.0151 0.1167 494 0.1571 0.0210 0.0979
474 0.1597 0.0151 0.1167 495 0.1567 0.0221 0.0946
475 0.1597 0.0152 0.1164 496 0.1563 0.0233 0.0910
476 0.1597 0.0152 0.1164 497 0.1559 0.0248 0.0866
477 0.1596 0.0153 0.1160 498 0.1553 0.0264 0.0819
478 0.1596 0.0153 0.1160 499 0.1548 0.0283 0.0765
479 0.1595 0.0154 0.1157 500 0.1541 0.0305 0.0703
480 0.1594 0.0155 0.1153 501 0.1534 0.0330 0.0635
481 0.1594 0.0156 0.1150 502 0.1526 0.0358 0.0562
482 0.1593 0.0158 0.1144 503 0.1518 0.0391 0.0478
483 0.1592 0.0159 0.1140 504 0.1508 0.0428 0.0389
484 0.1591 0.0161 0.1134 505 0.1498 0.0469 0.0298
485 0.1590 0.0163 0.1127 506 0.1487 0.0516 0.0211
486 0.1589 0.0166 0.1118 507 0.1475 0.0568 0.01610
487 0.1587 0.0169 0.1108 508 0.1463 0.0625 0.0194
488 0.1586 0.0172 0.1098 509 0.1450 0.0689 0.0293
489 0.1584 0.0177 0.1082 510 0.1436 0.0758 0.0418
490 0.1582 0.0182 0.1066
Table 1
The wavelength location that can obtain the optimum cut off of the first optical filter 130 in the present embodiment from table 1 is 507nm, and the chromaticity coordinates of the blue laser that obtain this moment and the mixed light 153 of the yellow Stimulated Light of part is the chromaticity coordinates of predetermined blue light recently.According to said method, can determine when the chromaticity coordinates of the mixed light of blue laser and the yellow Stimulated Light of part during near the chromaticity coordinates of predetermined blue light, the position of the cut off wavelength of the first optical filter 130, this moment, the first optical filter 130 can be divided into two parts in the mode of transmission and reflection with the Stimulated Light of the outgoing of wavelength conversion layer, be not absorbed blue laser and short wavelength partially mixed from one tunnel outgoing, be divided into the two-way outgoing, and realize that emergent light has better display effect.Through experimental verification, generally be cut off some intercepting and with the yellow Stimulated Light of the part of the equidirectional outgoing of blue laser be short wavelength's part of yellow Stimulated Light, namely the cut off wavelength is less than the wavelength of yellow Stimulated Light crest location.
What deserves to be explained is, in the present embodiment, the cut off wavelength of the first optical filter 130 is to choose from the wavelength of yellow Stimulated Light spectrum shorter position, and in fact also can choose from the long position of wavelength, again choose this moment at every turn wavelength corresponding to cut off reduces gradually, can obtain equally optimum cut off.
In addition, preferably, in the preparation method of the first optical filter 130 cut off positions, chromaticity coordinates adopts chromaticity coordinates corresponding in the CIE1976 chromatic diagram carrying out corresponding calculating.Therefore because CIE1976 chromatic diagram homogeneity is better than the CIE1931 chromatic diagram, chromaticity coordinates is converted in the CIE1976 chromatic diagram coordinate and calculates and to obtain higher accuracy.
In other embodiment of the present utility model, the first optimum cut off of optical filter 130 position also can utilize other method to obtain.For example, chromaticity coordinates in said method is converted to corresponding predominant wavelength, and the difference size between the predominant wavelength of the spectrum that intercepts by different cut off wavelength selects the cut off wavelength of the first optical filter optimum, makes the predominant wavelength difference of the predominant wavelength of spectrum of intercepting and predetermined blue light minimum.
Wavelength converter 120 also comprises drive unit 123.Drive unit 123 is used for driving wavelength conversion layer 121 motions, so that the hot spot that blue laser light source 110 forms acts on this wavelength conversion layer along predefined paths, cause the problem of these wavelength conversion layer 121 temperature risings in the same position of wavelength conversion layer to avoid the laser long duration of action on this wavelength conversion layer 121.Particularly, in the present embodiment, drive unit 123 is used for driving wavelength conversion layer 121 periodic rotary, so that the hot spot that blue laser light source 110 forms on this wavelength conversion layer 121 acts on this wavelength conversion layer 121 along predetermined circular path.In other embodiment of the utility model, drive unit 123 also can drive wavelength conversion layer 121 and otherwise move, such as horizontal reciprocating movement etc.In the situation that the material for transformation of wave length of wavelength conversion layer 121 can withstand higher temperatures, Wavelength converter 120 also can not arrange drive unit.
Wavelength converter 120 also comprises substrate 122, is specially clear glass here, and this substrate 122 is arranged on the first surface of the first transition zone 121, is used for fixed wave length conversion layer 121.Exciting light incides this substrate 122 and is transmitted through on wavelength conversion layer 121.Preferably, the surface of substrate 122 is provided with one deck filter coating, and this filter coating can transmit blue laser 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 improve exciting light and Stimulated Light utilization factor simultaneously.But in the situation that the rigidity of wavelength conversion layer enough (for example wavelength conversion layer 121 forms in fluorescent powder is entrained in clear glass) own, substrate is omissible, can be plated in filter coating on the surface of wavelength conversion layer 121 this moment, has equally identical effect.
In the present embodiment, light-emitting device 100 also comprises the second optical filter 140, this second optical filter 140 is positioned on the light path of wavelength conversion layer 121 emergent lights, receive the residue light 154 of the first optical filter 130 transmissions, and by transmission green glow 156 reflect red 155 wherein will remain in light 154 ruddiness from another road outgoing and green glow along the original optical path outgoing.In prior art, the wavelength corresponding to cut off of the second optical filter 140 commonly used is arranged on 590nm, found through experiments, in the present embodiment, intercepting by the first optical filter 130, the wavelength that cut off is corresponding is arranged on that the chromaticity coordinates of green glow 156 is (0.34 after the second optical filter 140 transmissions of 590nm, 0.64), green light color coordinate (0.33 during situation about yellow Stimulated Light not being intercepted with respect to the first optical filter 130,0.63), the gamut range of the final emergent light of light-emitting device increases slightly, and drop shadow effect also has improvement slightly.Setting by the second optical filter 140, light-emitting device 100 in the present embodiment is with the mixed light 153 of outgoing ruddiness 155, green glow 156 and blue laser and part gold-tinted, can be used as the light source of optical projection system, in this optical projection system, the mixed light 153 of ruddiness 155, green glow 156 and blue laser and part gold-tinted three light valves of incident is respectively modulated simultaneously, and finally projects to and carry out projection on same screen.In addition, in other embodiment of the utility model, the the second all right transmit red light of optical filter 140 and reflect green light, on the other hand, the position of the second optical filter 140 is not limited to be placed on after the first optical filter 130 on light path, also can be placed on the light path before the first optical filter 130, and the second optical filter 130 receives the emergent light of the first transition zones 121, with the ruddiness in this emergent light with residue light respectively along the both direction outgoing, and should remain light outgoing to the first optical filter 130.The residue light here is the mixed light of the green glow composition in blue laser and Stimulated Light.The second optical filter 130 can be arranged in parallel with the first optical filter 140, also can form the cruciform light-dividing device with the first optical filter 140, and this is known technology, does not repeat them here.
Preferably, light-emitting device 100 also comprises light adjusting gear 160, outgoing to the first optical filter 130 after this light adjusting gear 160 is collected the emergent light of wavelength conversion layer 121 and reduced its dispersion angle.Particularly, angular adjustment apparatus 160 in the present embodiment is the taper square rod, this taper square rod 160 is collected the emergent light of wavelength conversion layer 121, be incident to the first optical filter 130 after adjustment, to reduce the dispersion angle of emergent light, make the incident light of the part wide-angle that originally can be reflected from the first optical filter 130 transmissions, the light loss that causes with the angle drift characteristic that reduces because of the first optical filter 130.In other embodiments, light adjusting gear 160 also can be CPC (Compound Parabolic Concentrator, the composite parabolic gatherer) or the integrating rod of other form, can also be the optical device that can reduce the beam divergence angle of other forms such as lens.But in the less demanding situation of light transmission efficient for the first optical filter, light-emitting device also can not arrange the light adjusting gear.
Embodiment two
Fig. 2 a is the front view of another embodiment luminous device structure of the present utility model, and as shown in Fig. 2 a, light-emitting device 200 comprises blue laser light source 210, Wavelength converter 220, the first optical filters 230, light adjusting gear 250.
In the present embodiment, light-emitting device 200 is with the difference of light-emitting device shown in Fig. 1 a:
1) in the present embodiment, Wavelength converter 220 comprises wavelength conversion layer 221, reflection horizon 222, drive unit 223.Wavelength conversion layer 221 comprises relative first surface and second surface, and reflection horizon 222 is arranged on second surface one side of wavelength conversion layer 221.Reflection horizon 222 is specially high anti-aluminium flake, and the anti-aluminium flake 222 of this height can reflect away exciting light and the Stimulated Light that incides the anti-aluminium flake 222 of this height.The high anti-aluminium flake 222 here also has the effect of supporting wavelength conversion layer 221, and it can also replace with the device that catoptron etc. has a reflection function.In other embodiment of the utility model, in the enough situation of the thickness of the material for transformation of wave length of wavelength conversion layer 221, also reflection horizon 222 can be set.
Fig. 2 b is the left view of wavelength conversion layer 221 structures, as shown in Fig. 2 b, wavelength conversion layer 221 comprises the first transition zone 221a and the second transition zone 221b, comprise respectively green light fluorescent powder and red light fluorescent powder, the first transition zone 221a receive blue laser and with its part be converted to green Stimulated Light and with together outgoing of the blue laser that is not converted, the second transition zone 221b receives blue laser and also is converted into red Stimulated Light and outgoing.Wavelength conversion layer 221 cyclical movement under the driving of drive unit 223 makes the first transition zone 221a and the first transition zone 221b periodically be positioned on the emitting light path of blue laser.When the first transition zone 221a is positioned on light path, the first optical filter 230 receives the emergent light of the first transition zone 221a, and transmit blue laser and part green glow and reflect residue light, when the second transition zone 221b is positioned on light path, the first optical filter 230 receive the emergent light of wavelength transition zone 221b and with reflect red and transmit blue laser respectively along the both direction outgoing.In other embodiment of the present utility model, the second transition zone can be other material for transformation of wave length, and differs and be limited to red light wavelength transition material in the present embodiment.
With in the embodiment shown in Fig. 1 a similarly, preferably, because the first transition zone 221a is provided with the green wavelength transition material, the wavelength of the cut off of the first optical filter more than or equal to 480nm less than or equal to 510nm, through experimental verification, the wavelength of the cut off of the first filter plate is arranged in the 480nm-510nm scope, can so that the chromaticity coordinates of the blue laser of the first transition zone 221a outgoing and part green glow Stimulated Light more near predetermined blue light color coordinate.Because the red light wavelength transition material of the second transition zone 221b can not absorb blue laser fully, the second transition zone 221b can the outgoing blue light and the mixed light of red Stimulated Light.Therefore the blue laser of the second transition zone 221b outgoing can superpose with the mixed light of blue light in the mixed light of the first transition zone 221a outgoing with the part green glow, form final blue light effect, but in the mixed light of the first transition zone 221a outgoing, the chromaticity coordinates of blue light and part green glow makes moderate progress with respect to the chromaticity coordinates of blue laser, so final blue light effect also can be improved.Certainly, similarly, can utilize with the embodiment shown in Fig. 1 a in similar method, determine the optimum cut off position of the first optical filter 230, the spectrum of the emergent light of the first filter area 221a and the second filter area 221b can be superposeed here considered as a spectrum, determines that chromaticity coordinates calculates.
In the present embodiment, wavelength conversion layer 221 is with mixed light and the red exciting light of sequential outgoing blue laser and green exciting light, blue laser and green exciting light will be divided into the mixed light of blue laser and the green Stimulated Light of part and the green exciting light of remainder by the first optical filter 230, red Stimulated Light will by the first optical filter 230 reflections and with the outgoing of the same light path sequential of the green exciting light of part.Therefore, this light-emitting device 200 can be as the light source of two light valve projection systems, one of them light valve modulation blue light, the sequence light of another light valve modulation green glow and ruddiness.
What deserves to be explained is, in other embodiment of the present utility model, wavelength conversion layer can also comprise the zone more than 3, no matter how much quantity in the zone of wavelength conversion layer is, as long as the first transition region comprises green wavelength transition material or yellow wavelengths transition material or both potpourris, can act on by the light splitting of the first optical filter and add part green glow or gold-tinted to improve the blue laser chromaticity coordinates in blue laser.
2) in the present embodiment, light-emitting device 200 also comprises light collecting device 240.Light collecting device 240 is the cambered surface reflection unit that comprises the reflecting surface of light hole and light hole outside, blue laser is incident on the first surface of wavelength conversion layer 221 through light hole, the major part of the emergent light of wavelength conversion layer 221 is by the reflection of the reflecting surface of cambered surface reflection unit 240 and be collected into the first optical filter 230 by light adjusting gear 260, and fraction leaks from light hole.Preferably, cambered surface reflection unit 240 is the part of semielliptical shape or semielliptical shape, and wavelength conversion layer 221 is arranged at a focus of this ellipsoid, thereby most of light of wavelength conversion layer 221 outgoing reflexes to another focus of this ellipsoid through the reflecting surface of cambered surface reflection unit; Perhaps, cambered surface reflection unit 240 is semisphere or a hemispheric part, and wavelength conversion layer 221 is arranged at a bit near this spherical centre of sphere, thereby most of light of wavelength conversion layer 221 outgoing reflexes to and this another point about centre of sphere symmetry through the reflecting surface of cambered surface reflection unit, collects so that carry out light.In addition, light collecting device 240 is not limited in the cambered surface reflection unit with light hole in the present embodiment, can be also the reflection unit of lens, other shape with holes, the devices such as cambered surface reflection unit not with holes in other embodiments.
The above is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.

Claims (10)

1.一种发光装置，其特征在于，包括：  1. A lighting device, characterized in that, comprising: 蓝光激光光源，该蓝光激光光源用于出射蓝光激光；  Blue light laser light source, the blue light laser light source is used to emit blue light laser; 波长转换装置，该波长转换装置包括波长转换层，该波长转换层包括第一转换区，该第一转换区包括黄光波长转换材料或/和绿光波长转换材料，该第一转换区用于接收所述蓝光激光并将该蓝光激光部分转换为受激光，以出射所述受激光与未被转换的蓝光激光；  A wavelength conversion device, the wavelength conversion device includes a wavelength conversion layer, the wavelength conversion layer includes a first conversion region, the first conversion region includes a yellow wavelength conversion material or/and a green wavelength conversion material, and the first conversion region is used for receiving the blue laser and converting part of the blue laser into converted light, so as to emit the converted laser and unconverted blue laser; 第一滤光片，该第一滤光片用于接收所述第一转换区出射的受激光与未被转换的蓝光激光，并将蓝光激光与部分受激光的混合光及剩余受激光分别沿两个方向出射为所述发光装置的两路出射光，使得所述蓝光激光和部分受激光的混合光的色坐标更接近于预定蓝光的色坐标。  The first optical filter, the first optical filter is used to receive the converted light and the unconverted blue laser emitted from the first conversion area, and separate the mixed light of the blue laser and part of the converted light and the rest of the converted light along the The two directions are emitted as two outgoing lights of the light emitting device, so that the color coordinates of the mixed light of the blue laser light and part of the received light are closer to the color coordinates of the predetermined blue light. the 2.根据权利要求1所述的发光装置，其特征在于：所述第一转换区包括相对的第一表面与第二表面，该第一表面用于接收来自所述蓝光激光光源的蓝光激光，该第二表面用于将所述受激光与未被转换的蓝光激光的混合光出射至第一滤光片。  2. The light-emitting device according to claim 1, wherein the first conversion region comprises a first surface and a second surface opposite to each other, the first surface is used to receive the blue laser light from the blue laser light source, The second surface is used to emit the mixed light of the converted light and the unconverted blue light to the first filter. the 3.根据权利要求2所述的发光装置，其特征在于：所述波长转换装置还包括设置在第一转换区的第一表面一侧的基板，该基板表面设置有滤光膜，该滤光膜用于透射所述蓝光激光并反射所述受激光。  3. The light emitting device according to claim 2, characterized in that: the wavelength conversion device further comprises a substrate disposed on the first surface side of the first conversion region, a filter film is provided on the surface of the substrate, and the filter film The film is used to transmit the blue laser light and reflect the stimulated light. the 4.根据权利要求1所述的发光装置，其特征在于：第一转换区包括相对的第一表面与第二表面，所述波长转换装置还包括设置在第一转换区的第二表面一侧的反射层；  4. The light-emitting device according to claim 1, wherein the first conversion region comprises a first surface and a second surface opposite to each other, and the wavelength conversion device further comprises a the reflective layer; 所述发光装置还包括光收集装置，该光收集装置包括透光孔与透光孔外部的反射面的反射装置，该透光孔用于将所述蓝光激光透射至第一表面，该反射面用于将来自第一转换区的受激光与未被转换的蓝光激光的混合光反射至第一滤光片。  The light-emitting device also includes a light-collecting device, the light-collecting device includes a reflection device comprising a light-transmitting hole and a reflecting surface outside the light-transmitting hole, the light-transmitting hole is used to transmit the blue laser light to the first surface, and the reflecting surface It is used to reflect the mixed light of the converted light from the first conversion area and the unconverted blue laser light to the first optical filter. the 5.根据权利要求1所述的发光装置，其特征在于：所述第一转换区只包括黄光波长转换材料，所述第一滤光片的截止点的波长大于等于490nm且小于等于520nm。  5 . The light emitting device according to claim 1 , wherein the first conversion region only includes yellow light wavelength conversion material, and the wavelength of the cut-off point of the first filter is greater than or equal to 490 nm and less than or equal to 520 nm. the 6.根据权利要求1所述的发光装置，其特征在于：所述第一转换区只包括绿光波长转换材料，所述第一滤光片的截止点的波长大于等于480nm且小于等于510nm。  6 . The light emitting device according to claim 1 , wherein the first conversion region only includes green light wavelength conversion material, and the wavelength of the cut-off point of the first filter is greater than or equal to 480 nm and less than or equal to 510 nm. the 7.根据权利要求5所述的发光装置，其特征在于：所述第一转换区包括黄光波长转换材料，所述发光装置还包括第二滤光片；  7. The light emitting device according to claim 5, wherein the first conversion region comprises a yellow light wavelength conversion material, and the light emitting device further comprises a second filter; 第二滤光片接收所述第一滤光片出射的部分黄色受激光，并透射绿光反射红光或者透射红光反射绿光，或者接收所述第一转换区的出射光，将该出射光中的红光与剩余光分别沿两个方向出射，并将该剩余光出射至所述第一滤光片。  The second optical filter receives part of the yellow received light emitted by the first optical filter, and transmits green light and reflects red light or transmits red light and reflects green light, or receives the outgoing light of the first conversion area, and the outgoing light The red light and the remaining light in the emitted light are respectively emitted in two directions, and the remaining light is emitted to the first filter. the 8.根据权利要求1所述的发光装置，其特征在于：所述波长转换层还包括第二转换区，该第二转换区包括不同于所述第一转换区的波长转换材料，接收所述蓝光激光并将其至少部分转换为受激光，所述波长转换装置还包括驱动装置，所述波长转换层在所述驱动装置的驱动下周期性运动，使得所述第一转换区和第一转换区周期性地位于蓝光激光的出射光路上。  8. The light-emitting device according to claim 1, wherein the wavelength conversion layer further comprises a second conversion region, the second conversion region comprises a wavelength conversion material different from the first conversion region, and receives the Blue light and converting it into at least part of the converted light, the wavelength conversion device also includes a driving device, and the wavelength conversion layer moves periodically under the driving of the driving device, so that the first conversion region and the first conversion The regions are periodically located on the outgoing light path of the blue laser. the 9.根据权利要求8所述的发光装置，其特征在于：所述第一转换区包括绿光波长转换材料，所述第二转换区包括红光波长转换材料，所述第一滤光片还用于接收所述第二转换区的出射光，并将该出射光中的红光与蓝光分别沿两个方向出射。  9. The light-emitting device according to claim 8, wherein the first conversion region comprises a green wavelength conversion material, the second conversion region comprises a red wavelength conversion material, and the first filter further comprises It is used for receiving the outgoing light of the second conversion area, and emitting the red light and the blue light in the outgoing light along two directions respectively. the 10.一种投影系统，其特征在于，包括权利要求1至9中所述的任一项的发光装置。  10. A projection system, characterized by comprising the light emitting device according to any one of claims 1-9. the
CN2012203859507U 2012-08-05 2012-08-05 Light-emitting device and projection system Expired - Lifetime CN203025471U (en)

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