CN203587953U - Light source, projection display device and optical fiber lighting device - Google Patents
Light source, projection display device and optical fiber lighting device Download PDFInfo
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- CN203587953U CN203587953U CN201320626320.9U CN201320626320U CN203587953U CN 203587953 U CN203587953 U CN 203587953U CN 201320626320 U CN201320626320 U CN 201320626320U CN 203587953 U CN203587953 U CN 203587953U
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Abstract
The utility model provides a light source. The light source comprises a wavelength conversion layer and a substrate, the wavelength conversion layer comprises a first surface and a second surface which are opposite to each other, the first surface of the wavelength conversion layer is attached to a first surface of the substrate, and the first surface of the substrate has reflectivity for light emitted from the wavelength conversion layer; the light source comprises a plurality of excitation light sources fixed on the first surface of the substrate and arranged around the wavelength conversion layer; and the light source also comprises a plurality of reflection devices corresponding to the plurality of excitation light sources one by one, exciting light emitted from each excitation light source irradiates on the second surface of the wavelength conversion layer after being reflected by the corresponding reflection device, spatial position and/or space angle of each reflection device are adjustable, so that position of each light spot formed by each exciting light irradiating on the wavelength conversion layer is adjustable. The light source is compact in structure and low in cost, and positions of light spots formed by excitation light sources irradiating on the wavelength conversion layer can be controlled by the reflection devices.
Description
Technical field
The utility model relates to light source field, particularly relates to the light source of applying semiconductor technology.
Background technology
Current, light source technology has been applied to numerous areas, and applying maximum light sources is Halogen lamp LED and fluorescent light.The maximum problem of these light sources is luminance shortage.In recent years, LED light source development rapidly, utilizes blue LED to excite the yellow fluorescent powder that is coated on LED surface to produce white light, and this light source has started on market universal.But problem is that the power of single LEDs light source is lower, still has the problem of luminance shortage.
And high-luminance light source domain, conventional is high-pressure sodium lamp and xenon source, and such light source relies on ultrashort lamp arc and has very high brightness (energy density), but problem is its life-span, only has about 1000 hours, and use cost is very high.
Occurred at present a kind of semiconductor light sources, its structure as shown in Figure 8.The exciting light 821 that excitation source (not shown in FIG.) sends is incident in the refraction of lens 803 process lens 803 and focuses on phosphor powder layer 801 through the transmission of light splitting optical filter 811.Collimation being collected by lens 803 from the Stimulated Light 822 of phosphor powder layer 801 outgoing, through the reflection of light splitting optical filter 811 and finally outgoing.In this light source, light splitting optical filter 811 transmission exciting lights reflect Stimulated Light simultaneously, its role is to the light path of exciting light and Stimulated Light to be separated.If this light splitting optical filter not, thereby Stimulated Light will all cause serious light loss to the outgoing of excitation source direction.
Yet owing to there being the existence of light splitting optical filter, it is complicated and huge that whole light-source structure becomes, this is unfavorable for the development trend of current light source miniaturization.In addition, light splitting optical filter can filter out the remaining exciting light in emergent light, and this is also a part of light loss.
Summary of the invention
The utility model proposes a kind of light source, comprise wavelength conversion layer and substrate, wavelength conversion layer comprises relative first surface and second, and the first surface of wavelength conversion layer depends on the first surface of substrate, and the light that send for wavelength conversion layer on this surface has reflectivity; Comprise a plurality of excitation sources that are fixed on substrate first surface, the plurality of excitation source is arranged around described wavelength conversion layer; Also comprise a plurality of reflection units, a plurality of reflection units are corresponding one by one with a plurality of excitation sources, the exciting light of each excitation source transmitting is incident in the second surface of wavelength conversion layer through the reflection of a reflection unit, locus and/or the space angle of described reflection unit are adjustable, make each exciting light be incident in the position of hot spot that wavelength conversion layer forms adjustable.
The utility model also proposes a kind of projection display equipment, comprises that above-mentioned light source, as its lighting device, also comprises light valve, and light valve is for receiving the incident light of lighting device and it being carried out to image modulation.
The utility model also proposes a kind of fiber illumination device, comprises that above-mentioned light source, as its light emitting source, also comprises lens and optical fiber, and the light process lens focus that light emitting source sends is in the entrance of optical fiber.
Light-source structure of the present utility model is compact, cost is low, and can control the facula position that each excitation source is incident in wavelength conversion layer by reflection unit.
Accompanying drawing explanation
Fig. 1 a has represented the structural representation of the utility model the first embodiment;
Fig. 1 b has represented the vertical view of the function lens in Fig. 1 a illustrated embodiment;
Fig. 2 a has represented the structural representation of another embodiment of the utility model;
Embodiment medium wavelength conversion layer shown in Fig. 2 b presentation graphs 2a and the vertical view of arranging of excitation source;
Fig. 3 has represented the structural representation of another embodiment of the utility model;
Fig. 4 has represented the structural representation of another embodiment of the utility model;
Fig. 5 has represented the principle of work schematic diagram of the reflector in Fig. 4 embodiment;
Fig. 6 a and 6b have represented two kinds of possible structures of wavelength conversion layer;
Fig. 7 has represented structure and the principle of work of another kind of substrate and wavelength conversion layer;
Fig. 8 has represented existing a kind of light-source structure schematic diagram.
Fig. 9 a has represented the structural representation of another embodiment of the present utility model;
The inner region of function lens and the division of outskirt in the embodiment of Fig. 9 b presentation graphs 9a;
The schematic diagram of the light exit in Fig. 9 c presentation graphs 9a embodiment.
Embodiment
The structure of the light source of the first embodiment of the present utility model as shown in Figure 1a.This light source comprises wavelength conversion layer 101 and substrate 102, and wavelength conversion layer 101 comprises relative first surface and second.In Fig. 1 a, first surface is the lower surface of wavelength conversion layer 101, and the second face is the upper surface of wavelength conversion layer.The first surface of wavelength conversion layer 101 depends on the first surface 102a of substrate, the light that this surface 102a sends for wavelength conversion layer 101 has reflectivity, so light (Stimulated Light that comprises the stimulated emission of wavelength conversion layer own from wavelength conversion layer towards substrate outgoing, and/or remaining exciting light) can be reflected back wavelength conversion layer by this first surface 102a, and final second (upper surface) outgoing from wavelength conversion layer.Therefore, due to the existence of substrate, all can be from its second outgoing from the light of wavelength conversion layer outgoing.Particularly point out, in the following description, the emergent light of wavelength conversion layer refers to the Stimulated Light of the stimulated emission of wavelength conversion layer own, or Stimulated Light and there is no the mixed light of absorbed remaining exciting light.
Light source also comprises the function optical element 103 that is positioned at second side of wavelength conversion layer, and in the present embodiment, function optical element 103 comprises function lens 103.From the light of second outgoing of wavelength conversion layer 101, can be received and reflect by function lens 103, refraction can make from the angle of the wide-angle light of wavelength conversion layer outgoing to diminish, thereby realizes the effect of collimation.
As shown in Figure 1 b, its surface is divided into inner region 103b and outskirt 103a to the vertical view of function lens 103, and outskirt is positioned at the outside that is located farther from function lens center of inner region.In the present embodiment, the surface of function lens 103 is complete smooth, is not therefore divided in shape Liang Ge district, and inner region 103b and outskirt 103a are artificial settings.Certainly, function lens 103 also can be divided into inner region and outskirt in external form, and this does not affect the normal work of light source in the utility model.
The light source of the present embodiment also comprises excitation source 104 and 105, the exciting light 124 of excitation source 104 transmittings is incident in the outskirt of function lens 103, and through these function lens 103, focus on the surperficial also excitation wavelength conversion layer 101 of wavelength conversion layer 101 and generation Stimulated Light, the exciting light 125 of excitation source 105 transmittings is incident in the outskirt of function lens 103, and through these function lens 103, focuses on the surperficial also excitation wavelength conversion layer 101 of wavelength conversion layer 101 and generation Stimulated Light.Stimulated Light or Stimulated Light and there is no the mixed light of absorbed residual excitation light from second (upper surface) outgoing collected by function lens 103 of wavelength conversion layer 101.
Light source also comprises the light exit 106 that is positioned at function lens 103 light path rear ends, the optical channel of the inner region emergent light of the scope covering function lens 103 of light exit 106 and the not optical channel of the outskirt emergent light of covering function lens 103.The scope of light exit 106 is determined by the frame 106a of energy shading light around it.The inner region of function lens 103 and outskirt play the effect of the emergent light of collecting and collimate wavelength conversion layer 101 simultaneously, and the light of wherein being collected by inner region can and become the emergent light of light source via light exit 106 outgoing, and the light of being collected by outskirt can not outgoing.According to light path principle of reversibility, the light of being collected by outskirt can the reverse outgoing along the incident direction of exciting light, and what this part light can part inciding on excitation source, and all the other can be blocked by the frame 106a of light exit.Therefore only have the light of being collected by the inner region of function lens 103 just can become effective emergent light.
In the present embodiment, function lens play simultaneously and converge exciting light to the effect of the emergent light of wavelength conversion layer and collection wavelength conversion layer, wherein the outskirt of function lens is used for converging exciting light, the inner region of function lens is for collecting the emergent light of wavelength conversion layer, separated in light path of the emergent light of so just having realized exciting light and wavelength conversion layer.In the present embodiment, owing to avoiding having used light splitting optical filter to make system become simple and compact; And if exciting light is not absorbed completely by wavelength conversion layer, this part remaining exciting light also can be collected by the inner region of function lens and a final part that forms the emergent light of light source, this is of great use for some occasion.For example, excitation source can be used blue laser diode, wavelength conversion layer is yellow phosphor coating, the blue laser of excitation source transmitting excites yellow fluorescent powder to produce yellow Stimulated Light like this, and yellow Stimulated Light has not formed white light emergent light via the inner region of function lens and light exit outgoing together with there is no absorbed remaining blue light.Certainly this just for example, also can use the wavelength conversion layer of blue-light excited other color of optical excitation, even can use uv excitation light excitation wavelength conversion layer, and the utility model does not limit.
In the present embodiment, function lens only include a slice convex lens, but in fact may be balsaming lens or lens combination, and therefore function lens are to be not limited to a slice lens herein, but refer to a lens optical system.Use in the present embodiment two excitation sources, easily understood, used an excitation source can realize the beneficial effects of the utility model equally.
The present embodiment exists a problem to be, the emergent light of the wavelength conversion layer of being collected by the outskirt of function lens 103 can form loss.Known according to optical knowledge, the outskirt of function lens is corresponding to the high angle scattered light of wavelength conversion layer transmitting, and total luminous energy of this part wavelength of light conversion layer transmitting is less, so this part loss is little, in practice acceptable often.
The structural representation of the light source of another embodiment of the present utility model as shown in Figure 2 a.The difference of this light source and previous embodiment is, light source comprises eight excitation sources (light source 204 is one of them), and these eight excitation sources are also fixed on the first surface of substrate 202.The vertical view of first surface as shown in Figure 2 b, arrange around wavelength conversion layer 201 by visible eight excitation sources.Such benefit has two, and the firstth, excitation source and wavelength conversion layer can share same substrate, and this substrate can, for they scatterings simultaneously, can make system simplify the most like this; The secondth, a plurality of excitation sources are arranged and also can be made system the compactest around wavelength conversion layer.
Excitation source and wavelength conversion layer are fixed on same substrate, this brings a problem, be exactly that excitation source can not directly be launched exciting light in the face of wavelength conversion layer, therefore in the present embodiment, comprise well a plurality of reflection units, a plurality of reflection units are corresponding one by one with a plurality of excitation sources, and the exciting light of each excitation source transmitting is incident in the outskirt of function lens 203 through the reflection of a reflection unit, and are finally incident in the second surface of wavelength conversion layer.One of them excitation source is example, and the exciting light 224 of excitation source 204 transmitting, along the outgoing that makes progress of the direction perpendicular to substrate first surface, is incident in reflection unit 207.The cross section of this reflection unit 207 is wedge shape, and its lower surface is inclined-plane, and this inclined-plane, with reflection horizon or catoptron, can reflex to function lens 203 by exciting light 224.The gradient on the lower surface inclined-plane of reflection unit can be controlled, and makes the reflected light of exciting light 224 can be incident in the outskirt of function lens 203.
In the present embodiment, adopt the mode of a plurality of excitation sources jointly to form excitation source and be used for excitation wavelength conversion layer, such benefit is, can jointly realize higher excitation light power with the excitation source of a plurality of lower-wattages, and this is helpful for the cost of controlling light source.On the other hand, this can bring again a problem, and a plurality of exciting lights are incident in wavelength conversion layer and can form a plurality of hot spots, if these a plurality of hot spots can not effectively be controlled, may cause the dispersion of energy and the decline of whole light-source brightness.Therefore preferred, locus and/or the space angle of reflection unit are adjustable.For a plurality of excitation sources, can exist a plurality of reflection units to send light to it and reflect respectively, 207 in figure is exactly in these reflection units.Thereby finely tune respectively each reflection unit and can control the position that the trend of each exciting light is controlled its hot spot on wavelength conversion layer.For example can, so that a plurality of hot spot overlaps, also may form other and specifically distribute.
Another difference of the present embodiment and previous embodiment is, the light source of the present embodiment also comprises the lens 212 that are positioned at light exit, and these lens 212 cover whole light exit.From the emergent light of the inner region outgoing of function lens, through in light exit, can also adjusted by lens 212 like this, for example lens 212 can further collimate the emergent light of the inner region outgoing from function lens 203 in the present embodiment, certainly also may change lens 212 and make to be focused on from the emergent light of the inner region outgoing of function lens 203.These are not all to be construed as limiting for example.
In the present embodiment, reflection unit is positioned at around the light exit of light source, and such benefit is, light exit is a part for the shell of light source, and the surrounding that reflection unit is positioned at light exit therefore reflection unit is also exposed to outside naturally, and this facilitates the adjusting of reflection unit.Such design can realize the compactest light-source structure.
Easily understand, in the present embodiment, function optical element also can only play the effect to the light collecting device of wavelength conversion layer, for for collecting from the light of wavelength conversion layer outgoing and by its collimation.This does not affect the realization of the adjustable beneficial effect of the present embodiment compactness, low cost and exciting light hot spot.
The structural representation of another embodiment of the present utility model as shown in Figure 3.The difference of the light source shown in the light source of this embodiment and Fig. 2 a is, the exit direction of the exciting light of each excitation source transmitting is not orthogonal to the first surface of substrate, but tilts to the direction of wavelength conversion layer.Such benefit is, can simplify the processing and manufacturing of reflection unit 307, makes reflection unit not need to be wedge shape and need to be only a plane.In the present embodiment, it is by the collimation lens lateral excursion of excitation source is realized that exciting light is tilted to wavelength conversion layer direction, the giving an example with excitation source 304 of lower mask body.First the exciting light 324 that excitation source 304 sends collimates through collimation lens 308, known according to optical knowledge, the position of collimation lens 308 is offset to wavelength conversion layer direction, will be to identical direction skew through the light beam of collimation lens 308 collimations, this exciting light 324 is incident in the outskirt of function lens by reflection unit 307 reflections of plane.
In the present embodiment, collimation lens 308 has been drawn out by ben, and in fact collimation lens also may exist in other embodiments, but emphasizes this details and do not draw owing to not having necessity.It should be noted that not drawing in other embodiments collimation lens does not represent that this collimation lens can not be applied to other embodiment.
In actual applications, except being offset collimation lens, realize the inclination of exciting light, can also adopt other method.For example, the first surface of process substrate is dip plane in the installation place of each excitation source, and excitation source itself tilts like this, and its emergent light also tilts naturally.
The structural representation of the light source of next embodiment of the present utility model as shown in Figure 4.Different from the first embodiment of the present utility model, the function optical element that is positioned at 401 second sides of wavelength conversion layer does not comprise function lens, and this function optical element comprises reflector 403.Reflector 403 has relative large mouth 403b and osculum 403a, and osculum 403a is towards wavelength conversion layer 401.
The principle of work of reflector is carried out special explanation in Fig. 5.In Fig. 5, from the light of the large mouthful 503b incident of reflector 503 can not be all from the osculum 503a outgoing of reflector 503, this is to meet " optical extend conservation " principle in optics.The light that is incident in the large mouthful 503b of reflector 503 has the first angular range, and the light in this angular range can be through reflector 503 and from the osculum 503a outgoing of reflector, the light outside this angular range can not pass reflector 503.According to " optical extend conservation " principle, light beam is constant at large mouthful and the area at osculum place and the product at light-emitting 3 D angle of reflector, and no matter osculum 503a place is that emergent light or its lighting angle of incident light are half-angle 90 degree to the maximum, therefore the area due to large mouthful 503b is greater than osculum 503a, therefore the angular range of the light at large mouthful 503b place must be less than positive and negative 90 degree at osculum 503a place, and the light that exceeds this angular range cannot pass through the system of this reflector.For example, in Fig. 5, low-angle light 521 can be directly through reflector and without any reflection, 522 of the light that angle is slightly large go out to be shot out from the osculum 503a of reflector through primary event, and angle compared with 523 of large light, the final large mouthful of 503b from reflector after multiple reflections has occurred in reflector and reflected again and can not pass reflector.
Therefore in the present embodiment, the first angular range of reflector is exactly to allow that light is from the angular range of osculum outgoing.The first angular range is divided into inner region and outskirt, and the angle of outskirt is greater than the angle of inner region.The exciting light that excitation source 404 sends is incident in large mouthful of 403b of reflector 403 after catoptron 407 reflections, and its incident angle belongs to the outskirt of reflector; This part exciting light can and be incident in wavelength conversion layer 401 and produces Stimulated Light from the osculum 403a outgoing of reflector; Stimulated Light or Stimulated Light and there is no the mixed light of absorbed residual excitation light from second outgoing collected by the osculum 403a of reflector of wavelength conversion layer, all light of collecting are all able to outgoing from large mouthful of 403b of reflector.This part emergent light is divided into two parts according to angle difference: the part in inner region and the part in outskirt.The light exit 406(of this light source is expressed as lens 406 in the drawings) be positioned at reflector light path rear end, the scope of light exit cover reflector inner region emergent light optical channel and do not cover the optical channel of the outskirt emergent light of reflector.Specifically, the optical channel of inner region emergent light refers to the optical channel that emergence angle is less, and the optical channel of outskirt emergent light refers to the optical channel that emergence angle is larger.And light exit is positioned at the center of optical axis, so it can optionally cover from some small angle ranges of large mouthful of outgoing of reflector, therefore can make the angular range that light exit is corresponding consistent with the angular range of the inner region of reflector by controlling the size (being exactly the pore size of controlling lens 406 in the present embodiment) of light exit, the scope of light exit just covers the optical channel of the inner region emergent light of reflector, so just can make the emergent light of reflector inner region part be able to from light exit outgoing.
Another difference of the present embodiment and previous embodiment is, excitation source 404 is fixed on another substrate 409 of the side of whole light source, and first the exciting light that it sends is adjusted direction through the reflection of catoptron 407.By adjusting the space angle of catoptron 407, can change the direction of light that excites by its reflection.Substrate 409 is for fixing excitation source 404 and be its heat radiation, and this substrate 409 can be combined into the substrate 402 of wavelength conversion layer an integral body, can one dispel the heat like this.
Compare embodiment above, use in the present embodiment reflector to replace function lens.Its benefit is, owing to being incident in exciting light that reflector is large mouthful as long as thereby angle is suitable for that be incident in wavelength conversion layer from the osculum outgoing of reflector surely and the corresponding position of osculum, this problem with regard to effectively having avoided the exciting light of a plurality of excitation source transmittings too to disperse at the formed hot spot of wavelength conversion layer: as long as control the large mouth that a plurality of exciting lights are incident in reflector, these exciting lights formed hot spot one on wavelength conversion layer is established a capital in the corresponding scope of osculum of reflector, this also helps these exciting lights and on wavelength conversion layer, forms uniform hot spot simultaneously, this light conversion efficiency to wavelength conversion layer is very helpful.Use another benefit of reflector to be, from major part the light of wavelength conversion layer outgoing first after the reflection of reflector sidewall again from large mouthful outgoing, this process has the effect of even light and shaping, makes from the light of large mouthful outgoing more evenly, and shape is identical with the shape of the large mouth of reflector.In general, large mouthful of reflector and the shape of osculum are identical, for example, be all circle or rectangle or square.This is very useful in practice, and for example, when the light that light source need to be sent focuses on a fibre bundle entrance, fibre bundle entrance is all circular, now uses reflector most effective with circular large mouthful; And in Projection Display, display chip is all rectangular, for example length breadth ratio is the rectangle of 4:3 or 16:9, if now the large mouth of reflector is for having the rectangle of identical aspect ratio, system effectiveness is now the highest.
Reflector can adopt hollow-core construction, and realizes at the inwall plating reflectance coating of hollow-core construction; Also can adopt solid construction, and keep its sidewall smooth, light can be in sidewall generation total reflection when portion propagates within it like this.The efficiency of solid construction is higher than hollow-core construction, but also higher to the requirement of assembly technology.The section edges of reflector may be that this is corresponding to the reflector of round platform or terrace with edge shape than the straight line that is easier to processing; The section edges of reflector also may make curved surface, and this is corresponding to composite parabolic or Composite Double curved surface optical collector, and this optical collector is higher but processing cost is also higher simultaneously than the efficiency of the reflector of round platform or terrace with edge shape.The shape design of reflector belongs to prior art, does not do too much description herein.Reflector can be close to wavelength conversion layer installation, the highest to the collection efficiency of the light of wavelength conversion layer emergent light like this; Certainly reflector can not contact with wavelength conversion layer yet, although efficiency decreases and still may bring other benefit like this, for example the embodiment medium wavelength conversion layer shown in Fig. 7 will be moved below, and now reflector just can not contact with wavelength conversion layer.
Be appreciated that, in embodiment above, different embodiment have different separately features, for example the position of the excitation source in different embodiment may be different, function optical element may be different, can independent assortment but these features are actually, be not limited to the combination in the utility model embodiment, the cited embodiment of the utility model is unlimited several giving an example of planting in combination just.For example, in the embodiment shown in fig. 4, excitation source also can be fixed on substrate 402.
In the above in embodiment, no matter function optical element is function lens or reflector, all there is inner region and outskirt, difference is that the inner region of function lens and outskirt are the divisions in the physical extent of lens surface, and the division of light angle within the scope of the special angle that the inner region of reflector and outskirt are reflectors can be received, no matter being any division, is all optical channel to be divided into Er Zheliangge district, Liang Ge district play different effects.Before mention inner region and outskirt division be actually artificial setting, the rule so that its boundary line also may not be as shown in Figure 1 b, level and smooth.The setting rule of inner region and outskirt is such: the light that wavelength conversion layer sends is through the outgoing of function optical element, and this light has an optical channel; Design light exit does not cover all optical channels, but the part (center refers to Shang center, locus or angle Shang center herein) at the center of covering optical channel, the region of the corresponding function optical element of this part optical channel that its covers is exactly inner region, and the remaining part not covered by light exit and the part that light path covered of the light that is excited is exactly outskirt.The scope of the inner region of visible function optical element is that the scope of design by light exit decides.
For instance, Fig. 9 a has represented that the utility model has the light-source structure schematic diagram of an embodiment, compare with the embodiment of Fig. 1 a, its difference is only that two excitation sources 904 and 905 are positioned at the pore diameter range of light source outlet 906, the light exit of this light source is not just whole aperture 906 like this, but a part in aperture 903.As shown in Fig. 9 c, in aperture 906, dash area is the projection of excitation source 904 and 905, that is to say that this part light path light source 904 and 905 that is excited has blocked, so the light exit of this light source is remaining part 906b.The region on the corresponding function lens of this light-emitting window 906b 903 surfaces is as shown in Fig. 9 b, the lip-deep region 903b of function lens 903, this region 903b is exactly inner region, remaining area 903a1 and 903a2 are exactly outskirt, outskirt 903a1 is for receiving the exciting light that excitation source 904 sends, and outskirt 903a2 is for receiving the exciting light that excitation source 905 sends.Therefore, " outskirt is positioned at the outside that is located farther from function lens center of inner region " mentioned in description above, it is an average concept, be not the outside that all positions of outskirt are all positioned at all positions of inner region, but the distance of outskirt range capability lens center is far away than inner region on average.Same, for reflector, " angle of outskirt is greater than the angle of inner region " refers to the angle that the angle of outskirt is on average greater than inner region.
In the embodiment describing, wavelength conversion layer is not had to special regulation in the above.In fact wavelength conversion layer only plays the effect that absorbs exciting light outgoing Stimulated Light, and will wavelength conversion layer be described for some special application below, and these features or technical scheme can be applied to any one embodiment above.
In actual applications, may there is such demand: a kind of material for transformation of wave length can not meet the requirement of user to light, need two kinds of even more kinds of material for transformation of wave length to form wavelength conversion layer.Certainly the simplest method is exactly that different material for transformation of wave length is mixed, but this may bring a problem, be exactly between different wave length transition material, to occur the effect of absorption mutually, for example red fluorescence powder can absorb the green glow that green emitting phosphor sends.The light conversion efficiency of the reduction wavelength conversion layer that so certain meeting is serious.A kind of method of solution is as shown in Figure 6 a, to comprise at least two adjacent subregion 601a and 601b on wavelength conversion layer in light-struck region 601 that is excited, the material for transformation of wave length difference that this two sub regions is used.So both can use at least two kinds of material for transformation of wave length simultaneously, also can avoid occurring between them mutual absorption.In example shown in Fig. 6 a, two region 601a represent two kinds of regions of using different material for transformation of wave length, these two kinds of mutual cross arrangements in region with 601b.And two region 601a and 602b in Fig. 6 b represented another kind of arrangement mode.Be appreciated that arrangement mode is a lot, do not need to enumerate herein.Certainly should be in this way, the subregion of the two or more kinds of also can arranging.
In the practical application of light source, also there is a kind of like this actual demand: need the color of light source emergent light or colour temperature adjustable, can in different occasions, be adjusted to different colors or colour temperature as required.To this demand, can adopt scheme below to be solved:
In light source, also comprise drive unit, for driving substrate to drive wavelength conversion layer to move.As shown in Figure 7, drive unit (not shown in FIG.) drives substrate 702 and wavelength conversion layer 701 along left and right directions translation.The composition of the direction that wavelength conversion layer moves along this changes, composition due to wavelength conversion layer changes like this, the composition of emergent light also will change, and control the position of wavelength conversion layer by accessory drive, just can control color or the colour temperature of emergent light.For example, wavelength conversion layer 701 is fewer and feweri along its contained yellow fluorescent powder of direction from left to right, when using blue light to excite, by the position of adjusting wavelength conversion layer, just can control the colour temperature of emergent light like this.Specifically, wavelength conversion layer is regulated to the right, yellow fluorescent powder reduces, and remaining exciting light increases, so the colour temperature of emergent light improves.Another example is, wavelength conversion layer 701 is constant along the amount of direction yellow fluorescent powder from left to right, and the amount of red fluorescence powder increases, along with regulating the red composition of the emergent light of light source to the right, will increase wavelength conversion layer like this, and remaining blue light composition will reduce.Obviously, in this case, can in conjunction with the method in Fig. 6 a and Fig. 6 b, increase the composition of red fluorescence powder, for example, increase the area ratio of red fluorescence powder subregion.Do not do too much for example, what need to explicitly point out is the composition variation of wavelength conversion layer, comprises changes in material wherein, also comprises the variation of the ratio of each material herein.
The utility model also proposes a kind of projection display equipment, comprises that above-mentioned light source, as its lighting device, also comprises light valve, and light valve is for receiving the incident light of lighting device and it being carried out to image modulation.
The utility model also proposes a kind of fiber illumination device, comprises that above-mentioned light source, as its light emitting source, also comprises lens and optical fiber, and the light process lens focus that light emitting source sends is in the entrance of optical fiber.
The foregoing 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 conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; 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 utility model.
Claims (10)
1. a light source, is characterized in that:
Comprise wavelength conversion layer and substrate, wavelength conversion layer comprises relative first surface and second, and the first surface of described wavelength conversion layer depends on the first surface of substrate, and the light that send for wavelength conversion layer on this surface has reflectivity;
Comprise a plurality of excitation sources that are fixed on substrate first surface, the plurality of excitation source is arranged around described wavelength conversion layer;
Also comprise a plurality of reflection units, a plurality of reflection units are corresponding one by one with a plurality of excitation sources, the exciting light of each excitation source transmitting is incident in the second surface of wavelength conversion layer through the reflection of a reflection unit, locus and/or the space angle of described reflection unit are adjustable, make each exciting light be incident in the position of hot spot that wavelength conversion layer forms adjustable.
2. light source according to claim 1, is characterized in that, the exit direction of the exciting light of each excitation source transmitting tilts to the direction of wavelength conversion layer.
3. light source according to claim 1, is characterized in that, also comprises the light collecting device that is positioned at wavelength conversion layer second surface one side, for collecting from the light of wavelength conversion layer outgoing and by its collimation.
4. light source according to claim 3, is characterized in that, described exciting light is through the second surface that is incident in wavelength conversion layer after described light collecting device.
5. light source according to claim 1, is characterized in that, described reflection unit is positioned at around the light exit of light source.
6. light source according to claim 1, is characterized in that, described excitation source transmitting blue laser, described wavelength conversion layer stimulated emission gold-tinted.
7. according to the light source described in any one in claim 1 to 6, it is characterized in that, comprise at least two adjacent subregions on described wavelength conversion layer in light-struck region that is excited, the material for transformation of wave length that this two sub regions is used is different.
8. according to the light source described in any one in claim 1 to 6, it is characterized in that, also comprise drive unit, for driving described substrate to drive wavelength conversion layer to move; Wavelength conversion layer changes along the composition of the direction of described movement.
9. a projection display equipment, is characterized in that, comprises that light source described in any one in claim 1 to 8, as its lighting device, also comprises light valve, and light valve is for receiving the incident light of lighting device and it being carried out to image modulation.
10. a fiber illumination device, is characterized in that, comprises that right to use requires light source described in any one in 1 to 8 as its light emitting source, also comprises lens and optical fiber, the light that light emitting source sends through lens focus in the entrance of optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320626320.9U CN203587953U (en) | 2013-10-11 | 2013-10-11 | Light source, projection display device and optical fiber lighting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626320.9U CN203587953U (en) | 2013-10-11 | 2013-10-11 | Light source, projection display device and optical fiber lighting device |
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| CN203587953U true CN203587953U (en) | 2014-05-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390148A (en) * | 2014-10-12 | 2015-03-04 | 杨毅 | Polarized light-emitting device |
| CN106338015A (en) * | 2015-07-08 | 2017-01-18 | 法雷奥照明公司 | Optical device, light module and lighting device comprising same |
| CN109634038A (en) * | 2019-01-15 | 2019-04-16 | 广东省半导体产业技术研究院 | Light supply apparatus and electronic equipment |
| JP2021529355A (en) * | 2018-06-29 | 2021-10-28 | 深▲せん▼市繹立鋭光科技開発有限公司Ｙｌｘ Ｉｎｃｏｒｐｏｒａｔｅｄ | Light source device |
| CN113671780A (en) * | 2021-08-31 | 2021-11-19 | 青岛海信激光显示股份有限公司 | Light emitting unit, light source system, and laser projection apparatus |
| CN114517896A (en) * | 2020-11-18 | 2022-05-20 | 杨毅 | Lighting device and lamp |
| CN115248527A (en) * | 2021-04-26 | 2022-10-28 | 成都极米科技股份有限公司 | Light source device and projection equipment |
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2013
- 2013-10-11 CN CN201320626320.9U patent/CN203587953U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390148A (en) * | 2014-10-12 | 2015-03-04 | 杨毅 | Polarized light-emitting device |
| CN106338015A (en) * | 2015-07-08 | 2017-01-18 | 法雷奥照明公司 | Optical device, light module and lighting device comprising same |
| JP2021529355A (en) * | 2018-06-29 | 2021-10-28 | 深▲せん▼市繹立鋭光科技開発有限公司Ｙｌｘ Ｉｎｃｏｒｐｏｒａｔｅｄ | Light source device |
| JP7123231B2 (en) | 2018-06-29 | 2022-08-22 | 深▲せん▼市繹立鋭光科技開発有限公司 | Light source device |
| CN109634038A (en) * | 2019-01-15 | 2019-04-16 | 广东省半导体产业技术研究院 | Light supply apparatus and electronic equipment |
| CN114517896A (en) * | 2020-11-18 | 2022-05-20 | 杨毅 | Lighting device and lamp |
| CN115248527A (en) * | 2021-04-26 | 2022-10-28 | 成都极米科技股份有限公司 | Light source device and projection equipment |
| CN113671780A (en) * | 2021-08-31 | 2021-11-19 | 青岛海信激光显示股份有限公司 | Light emitting unit, light source system, and laser projection apparatus |
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