CN107272311A

CN107272311A - Light-emitting device and relevant projecting system and illuminator

Info

Publication number: CN107272311A
Application number: CN201610211201.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Blue Lake Lighting Technology Co Ltd
Current assignee: Shanghai Blue Lake Lighting Technology Co Ltd
Priority date: 2016-04-06
Filing date: 2016-04-06
Publication date: 2017-10-20
Anticipated expiration: 2036-04-06
Also published as: CN107272311B

Abstract

The embodiment of the invention discloses a kind of light-emitting device and relevant projecting system and illuminator.Light-emitting device includes first laser device, collimating element, the first lens and Wavelength converter；First laser device is used for outgoing exciting light to collimating element, and collimating element is used to collimate the exciting light；First lens include the firstth area and the secondth area, the light-receiving area in firstth area is less than the 1/2 of the light-receiving area in secondth area, the focal length in the focal distance ratio in firstth area secondth area is short, exciting light from collimating element is incident to firstth area, and firstth area is used to the exciting light focusing to Wavelength converter；It is Stimulated Light that Wavelength converter, which is used at least part wavelength convert of exciting light, and its emergent light is reflexed into the firstth area of the first lens and the secondth area；First lens are additionally operable to collect emergent light and the outgoing of Wavelength converter incident thereon.The embodiment of the present invention has the advantages that small volume.

Description

Light-emitting device and relevant projecting system and illuminator

Technical field

The present invention relates to illumination and display technology field, more particularly to a kind of light-emitting device and relevant projecting system and illuminator.

Background technology

At present, LASER Excited Fluorescence powder is widely used to illumination and display technology field with the technology of outgoing colourama or white light.

Fig. 1 is a kind of structural representation of light-emitting device in the prior art.As shown in figure 1, light-emitting device 10 includes laser 11, collimation lens 12, speculum 13, light splitting optical filter 14, lens 15, lens 16, yellow fluorescent powder piece 17.The blue laser of the outgoing of laser 11 reflexes to light splitting optical filter 14 after the collimation of collimation lens 12 by speculum 13.There is light splitting optical filter 14 reflection blue light to transmit the attribute of gold-tinted, and blue laser is incident in lens 15 and 16 after the reflection of light splitting optical filter 14, successively, and focuses on phosphor sheet 17 after lens 15 and 16（Light is shown in dotted line）.Yellow fluorescent powder piece 17 absorbs at least part blue laser and produces gold-tinted, and the gold-tinted reflexes to lens 16 by reflection substrate, and is collected successively by lens 16, and collimates outgoing by lens 15（Light is such as with the shown in solid of arrow）.

Luminous due to material for transformation of wave length is lambertian distribution, and the light of this wide-angle distribution wants to collect, and generally requires that by least two lens efficient collection and collimation could be realized.Light-emitting device 10 completes two effects jointly by lens 16 and lens 15, and one is that, by parallel Laser Focusing to phosphor sheet 17, one is that directional light is collected and be collimated into the light that phosphor sheet 17 is sent.The bore of lens 16 is smaller and apart from luminous point（Phosphor sheet）It is close, the light of wide-angle（Such as all light within 70 degree）It is incident in angle after lens 16 to be zoomed in, is further collimated after being then incident in bigbore lens 15.

But, etendue law of conservation is limited to, the collimation of the collimated light beam of the outgoing of lens 15 is higher（I.e. the angle of divergence is smaller）, it is desirable to the bore of lens 15 is bigger（Because the sinusoidal product of bore and the angle of divergence is a constant, i.e. etendue conservation）.And laser optical path needs to bypass the edge of lens 15, and it is incident from the top of lens 15, therefore the bore of lens 15 is bigger, the light path of laser is longer, and the position for placing laser is also more remote, and whole system volume is also huger.

The content of the invention

The present invention solves the technical problem of the light-emitting device and relevant projecting system and illuminator for providing a kind of small volume.

The embodiment of the present invention provides a kind of light-emitting device, including first laser device, collimating element, the first lens and Wavelength converter；First laser device is used for outgoing exciting light to collimating element, and collimating element is used to collimate the exciting light；First lens include the firstth area and the secondth area, the light-receiving area in firstth area is less than the 1/2 of the light-receiving area in secondth area, the focal length in the focal distance ratio in firstth area secondth area is short, exciting light from collimating element is incident to firstth area, and firstth area is used to the exciting light focusing to Wavelength converter；It is Stimulated Light that Wavelength converter, which is used at least part wavelength convert of exciting light, and its emergent light is reflexed into the firstth area of the first lens and the secondth area；First lens are additionally operable to collect emergent light and the outgoing of Wavelength converter incident thereon.

Alternatively, light-emitting device also includes light-operated product, and at least most of outgoing of emergent light for the Wavelength converter that the first lens are collected is to the light-operated product, and the light-operated product is used to control the emergent light to realize specific light distribution.

Alternatively, light-emitting device also includes light guiding piece, exciting light for auto-collimation element in future is guided to the firstth area of the first lens along the first light path, and at least most of of emergent light for the Wavelength converter that the first lens are collected is guided to light-operated product along the second light path.

Alternatively, light guiding piece is light splitting optical filter, and the exciting light for auto-collimation element in future reflexes to the firstth area of the first lens along the first light path, and the Stimulated Light that the first lens are collected is transmitted through light-operated product along the second light path；Or, the exciting light for auto-collimation element in future is transmitted through the firstth area of the first lens along the first light path, and the Stimulated Light that the first lens are collected reflexes to light-operated product along the second light path.

Alternatively, light guiding piece includes the firstth area and the secondth area, the light-receiving area in firstth area is less than the 1/2 of the light-receiving area in the secondth area, the exciting light that firstth area is used for auto-collimation element in future is guided to the firstth area of the first lens along the first light path, and the emergent light that secondth area is used for the Wavelength converter for collecting first the secondth area of lens is guided to light-operated product along the second light path；Firstth area of light guiding piece is the first speculum, and the secondth area is the light transmission medium of the first mirror environment；Or, the firstth area of light guiding piece is loophole, and the secondth area is the speculum around loophole.

Alternatively, the firstth area of light guiding piece is loophole, and the secondth area is the speculum around loophole, and the speculum is reflecting curved surface；Light guiding piece is also light-operated product.

Alternatively, for the first lens are compared to planoconvex spotlight, bottom surface is plane or concave surface, and there is projection upper surface, the projection and the firstth area that the first lens are partly constituted below projection.

Alternatively, the light-emitting device also includes second laser and corresponding collimating element, and the exciting light of first laser device outgoing is distinguished after collimated element collimation with the laser of second laser outgoing, is combined into beam of laser and is incident to the firstth area of the first lens；Wavelength converter is additionally operable to scatter the laser from second laser.

The embodiment of the present invention also provides a kind of optical projection system, including any of the above-described light-emitting device.

The embodiment of the present invention also provides a kind of illuminator, including any of the above-described light-emitting device.

Compared with prior art, the embodiment of the present invention includes following beneficial effect：

The embodiment of the present invention is by by the first lens are divided into shorter focal length, less firstth area of light-receiving area and focal length is longer, light-receiving area is larger the secondth area, not only exciting light is caused to focus to Wavelength converter by the firstth shorter area of focal length, and most of emergent light of Wavelength converter can longer, light-receiving area is larger by focal length the secondth area collect, therefore most of emergent light of the Wavelength converter of the first lens outgoing will not be straightened, the problem of system bulk is big in the prior art so as to real solution.

Brief description of the drawings

Fig. 1 is a kind of structural representation of light-emitting device in the prior art；

Fig. 2 a are the structural representations of one embodiment of light-emitting device in the embodiment of the present invention；

Fig. 2 b are the structural representations of the first lens in Fig. 2 a illustrated embodiments；

Fig. 3 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Fig. 4 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Fig. 5 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Fig. 6 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Fig. 7 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Fig. 8 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Fig. 9 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 10 is the structural representation of the first lens of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 11 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 12 be light-emitting device in the embodiment of the present invention another embodiment in focus control structural representation；

Figure 13 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 14 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 15 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 16 a are the structural representations of another embodiment of light-emitting device in the embodiment of the present invention；

Figure 16 b are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident P polarization light and S-polarization light；

Figure 16 c are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident different wavelengths of light.

Embodiment

For the sake of quoting and understanding, the technical term that hereafter and in accompanying drawing uses is described as follows：

Material for transformation of wave length：Material for transformation of wave length can use phosphorescent material, and such as phosphor, it would however also be possible to employ nano material, such as quantum dot can also use fluorescent material.

Exciting light：Being capable of excitation wavelength transition material so that material for transformation of wave length produces the light of different wavelengths of light.

Stimulated Light：The light that material for transformation of wave length stimulated luminescence is excited and produced.

Exciting light, material for transformation of wave length, Stimulated Light are relative concepts.For example, blue light excites yellow fluorescent powder to produce gold-tinted, now blue light is exciting light, and gold-tinted is Stimulated Light.And gold-tinted excitated red fluorescent powder produces feux rouges, now gold-tinted is exciting light, and feux rouges is Stimulated Light.

The embodiment of the present invention is described in detail with embodiment below in conjunction with the accompanying drawings.

In order to solve the problems of the prior art, the present inventor initially considers directly to move down speculum 13 with 14, and move down into speculum 14 between lens 15 and lens 16, the laser that i.e. speculum 14 reflects only is incident in phosphor sheet by lens 16, so it is the periphery that first laser device can be caused without being arranged on lens 15, and can be arranged between lens 15 and lens 16 so that compact conformation, volume reduce.

But, laser only cannot focus on phosphor sheet 17 by lens 16, and to those skilled in the art, laser can not be focused on to have no relations on phosphor sheet 17, as long as fully can converge on phosphor sheet.In order to realize fully convergence or focus on, the curvature that lens 16 are designed must become big（Curvature conference enhancing convergence）.Because light path is reversible, the fluorescence of phosphor sheet outgoing can be more straight after the lens 16 that curvature becomes big, need to be diffused into lens 15 by long distance from the straight fluorescence of the comparison of the outgoing of lens 16, finally outgoing could be collimated by lens 15, thus cause length of the system on from lens 16 to this direction of lens 15, volume becomes big, and the problem of system bulk is big in the prior art is not still solved really.Therefore, the present inventor proposes the embodiment of the present invention veritably to solve bulky problem.

Embodiment one

Fig. 2 a are referred to, Fig. 2 a are the structural representations of one embodiment of light-emitting device in the embodiment of the present invention；Fig. 2 b are the structural representations of the first lens in Fig. 2 a illustrated embodiments.As shown in Figure 2 a, light-emitting device 100 includes first laser device 110, collimation lens 120, the second speculum 130, the first speculum 140, the first lens 150, Wavelength converter 160, the second lens 170.

First laser device 110 is used for outgoing exciting light（Such as blue light）To collimation lens 120.Collimation lens 120 is used to collimate the exciting light for directional light, and outgoing is to the second speculum 130.Second speculum 130 reflects the exciting light of the collimation to light guiding piece 140.Light guiding piece 140 is used for the exciting light from the second speculum 130 along the first light path（Shown in band arrow dotted line）Guide to the first area 151 of the first lens 150.

As shown in Figure 2 b, the first lens 150 include the first area 151（Unshaded area）With the second area 152（Shadow region）.In the present embodiment, the first lens 150 are compared to planoconvex spotlight（Such as collecting lens 16 of the prior art）For, upper face center has projection, the projection and part below projection（Dotted line area encompassed）Constitute the first area 151；I.e. relative to lens 16 of the prior art, the upper table face curvature in the first area 151 of the first lens 150 becomes big, and the upper table face curvature in the second area 152 is constant.First lens 150 can be processed directly（Molding processing）, it would however also be possible to employ the glued mode of small one and large one two lens.

Firstth area of the first lens is used to the exciting light of collimation focusing to Wavelength converter 160.It is understood that " focusing " in the embodiment of the present invention is not limited in focus and fallen on phosphor sheet, focus relative fluorescence powder piece is further along slightly before, as long as those skilled in the art's acceptable is converged enough.

Wavelength converter 160 includes material for transformation of wave length, for being Stimulated Light by the whole wavelength converts of exciting light from the first lens 150, and its emergent light, the i.e. Stimulated Light are reflexed to the first area 151 and the second area 152 of the first lens.In the present invention, Wavelength converter 160 is reflective, can include reflective with setting wavelength conversion sheet on reflective substrates（Such as yellow fluorescent powder piece）, the Stimulated Light that wavelength conversion sheet is produced reflexes to the first lens by reflective.

The light-receiving area in the firstth area of the first lens is less than the 1/2 of the light-receiving area in the secondth area.The light-receiving area in first the firstth area of lens refers to that the emergent light of Wavelength converter is incident on the surface area in the firstth area covered during firstth area, and the light-receiving area in first the secondth area of lens refers to that the emergent light of Wavelength converter is incident on the surface area in the secondth area covered during secondth area.The emergent light of Wavelength converter 160 is incident to the firstth area and the secondth area of the first lens 150, because the emergent light of Wavelength converter 160 is distributed in Lambert cosine, i.e. wide-angle is distributed, and the light-receiving area in the first area 151 of the first lens is less than the 1/2 of the light-receiving area in the second area 152, therefore the emergent light small portion of Wavelength converter 160 is incident to the first area 151 of the first lens, is largely incident to the second area 152 of the first lens.First lens 150 are additionally operable to collect the emergent light of Wavelength converter 160 incident thereon and outgoing is to light guiding piece 140, and emergent light dispersion angle after the first lens is zoomed in.

Light guiding piece 140 is additionally operable to the emergent light for the Wavelength converter for collecting the first lens, i.e. Stimulated Light along the second light path（With the shown in solid of arrow）Guide to the second lens 170.In the present embodiment, light guiding piece 140 is light splitting optical filter, the attribute of Stimulated Light is transmitted with reflected excitation light, the firstth area for whole exciting lights from the second speculum 130 to be reflexed to the first lens 150 along the first light path, whole Stimulated Lights that the first lens are collected are transmitted through the second lens 170 along the second light path.Certainly, light splitting optical filter can also be largely reflected exciting light, and Stimulated Light is largely transmitted.

Second lens 170 are designed for the emergent light from first the secondth area of lens collimating outgoing.Therefore, received from light guiding piece 140 after light, for the emergent light from first the secondth area of lens 152, the second lens 170 are collimated into directional light.The emergent light in first the secondth area of lens is incident to for Wavelength converter, completes to collect and be collimated into directional light jointly by the first lens 150 and the second lens 170.And it is incident to the emergent light of the Wavelength converter 160 in the first area 151 of the first lens, because light path is reversible, it is directional light that collimation can be changed into by first the firstth area of lens 151, so can be dissipated after the second lens 170, and can not be collimated by the second lens 170, although this part light be not carried out the collimating effect of design, but the ratio that light energy accounts for total light energy is relatively low, therefore it is acceptable to be not carried out collimating effect.Certainly, in order to reduce this loss for not meeting design, the firstth area of the first lens should be as far as possible small, as long as being enough to receive the exciting light for carrying out self-focus lenses.It is therefore preferred that the light-receiving area in the firstth area of the first lens is less than the 1/4 of the light-receiving area in the secondth area.

Relative to prior art, light guiding piece is arranged between the first lens and the second lens by the present embodiment so that first laser device can be arranged between the second lens and the first lens without being arranged on the periphery of the second lens, and structure is more compact.And, the characteristics of etendue for the emergent light that the present embodiment is much smaller than Wavelength converter using the etendue of incident laser, independent design area is smaller on the first lens, upper table face curvature becomes the firstth big area to receive laser, and make Laser Focusing on Wavelength converter, design area is larger on the first lens, the secondth constant area of upper table face curvature collect most of emergent light of Wavelength converter, therefore most of emergent light will not become more straight, so that the first lens to the distance between the second lens is not required to lengthen, second lens are with regard to that can make most of emergent light of Wavelength converter collimate outgoing.

The present embodiment is by by the first lens are divided into shorter focal length, less firstth area of light-receiving area and focal length is longer, light-receiving area is larger the secondth area, not only exciting light is caused to focus to Wavelength converter by the firstth shorter area of focal length, and most of emergent light of Wavelength converter can longer, light-receiving area is larger by focal length the secondth area collect, therefore most of emergent light of the Wavelength converter of the first lens outgoing will not be straightened, the problem of system bulk is big in the prior art so as to real solution.Also, the direct scheme being arranged on the first speculum between two lens without the first lens are carried out with subregion initially considered compared to the present inventor（Abbreviation initial scheme）, present inventor has performed many experiments contrast, the spot size that discovery the present embodiment focuses to Wavelength converter is more much smaller than the spot size of initial scheme.

Herein it should be noted that laser alignment is that the light collimation from first the secondth area of lens 152 is that directional light is a citing by directional light, the second lens 170 by collimation lens described above 120.As long as in fact, the second lens 170 can reduce the dispersion angle of the light from first the secondth area of lens 152, it is not required that the emergent light after the dispersion angle reduces is directional light.Similarly, as long as collimation lens 120 can reduce the dispersion angle of the exciting light of first laser device outgoing, it is not required that the emergent light of collimation lens is directional light.In addition, collimation lens 120 can be non-spherical lens, cylindrical mirror, arc-shaped reflecting mirror or other collimating elements.

In the present embodiment, the second speculum 130 is arranged on the top of collimation lens 120, and future, the laser of self-focus lenses bent 90 degree to light guiding piece 140.In other embodiments, the second speculum 130 can also be omitted, as long as the putting position and angle of adjustment first laser device 110 and collimation lens 120 so that the laser straight of collimation lens outgoing connects incident light guiding piece 140.

In other embodiments, light guiding piece 140 can also be the light splitting optical filter that Stimulated Light attribute is reflected with transmission exciting light, exciting light for self-focus lenses in future is transmitted through the firstth area of the first lens along the first light path, and the Stimulated Light that the first lens are collected reflexes to the second lens along the second light path.Certainly, light splitting optical filter can also largely be transmitted to exciting light, and Stimulated Light is largely reflected.

In addition, in other embodiments, Wavelength converter can use LED as substrate, material for transformation of wave length（Such as fluorescent material）It is arranged on modes such as coating or pad pastings in LED light-emitting area.For example, when use blue led as Wavelength converter substrate when, the one side of material for transformation of wave length is excited by the laser from the first lens, and another side is excited by the blue led, i.e. material for transformation of wave length is two-sided is excited simultaneously, thus can improve the outgoing brightness of light-emitting device.For another example, when use red LED as Wavelength converter substrate when, although material for transformation of wave length will not be excited by the red LED, but the feux rouges of red LED outgoing can with material for transformation of wave length produce Stimulated Light together with outgoing, so as to increase the energy of red-light spectrum for light-emitting device, the not enough defect of the red energy of Stimulated Light compensate for；This time guiding piece 140 is preferably the light splitting optical filter of reflected excitation light and transmission Stimulated Light and feux rouges.

Due to setting the technics comparing of material for transformation of wave length complicated on LED, therefore for the not enough defect of the red energy for making up Stimulated Light, light-emitting device can also include outgoing second laser second laser, with corresponding collimation lens.The exciting light of first laser device outgoing is distinguished after collimated collimated with the laser of second laser outgoing, is combined into beam of laser（Can outgoing closing light side by side, light splitting optical filter closing light can also be passed through）, it is another to play the firstth area through incident first lens of light guiding piece.And Wavelength converter is additionally operable to scatter the second laser from second laser so that outside Wavelength converter outgoing Stimulated Light, also outgoing is wavelength-converted the second laser of material scattering.Now, light guiding piece 140 can be the transmission of part reflecting part for second laser, so as to must have part light can be through light guiding piece outgoing to the second lens from the second laser of Wavelength converter.Second laser can be red laser or green laser, can so increase feux rouges or the energy of green spectrum for light-emitting device.Second laser can also be infrared laser, can so increase the energy of infrared spectrum for light-emitting device, in order to which user can have found the light-emitting device at night by infrared detector.

Embodiment two

Referring to Fig. 3, Fig. 3 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 3, light-emitting device 200 includes first laser device 210, collimation lens 220, the second speculum 230, the first lens 250, Wavelength converter 260, the second lens 270.

The present embodiment in place of the difference of embodiment one with being：

（One）In the present embodiment, light guiding piece 240 includes the firstth area and the secondth area, and the firstth area is the first speculum, and the secondth area is the air of the first mirror environment；Also, the light-receiving area in the area of light guiding piece first is less than the 1/2 of the light-receiving area in the secondth area.Specifically, first speculum of light guiding piece 240 reflexes to the first area 251 of the first lens 250 for the exciting light of self-focus lenses in future 220 along the first light path, the air of first mirror environment is used for the major part of the emergent light for the Wavelength converter for collecting the first lens 250, i.e. the emergent light of the Wavelength converter of the secondth area collection of the first lens 250 is transmitted through the second lens 270 along the second light path.Herein it should be noted that the first speculum herein is for the laser from first laser device to be reflection, it is not offered as all reflecting any light.In addition, the air of the first mirror environment can also be substituted for other light transmission mediums.

（Two）Exciting light partial wavelength conversion from the first lens 250 is Stimulated Light by the material for transformation of wave length of Wavelength converter 260, therefore the emergent light of Wavelength converter is Stimulated Light and the mixed light for the exciting light do not changed, the white light that for example yellow Stimulated Light is mixed with blue excitation light.Air of the emergent light through the first mirror environment for the Wavelength converter that secondth area of the first lens 250 is collected is transmitted through the second lens 270, and by the second collimated into directional light.The emergent light for the Wavelength converter that firstth area of the first lens 250 is collected reflect through the first speculum and can not be from emergent light of the outgoing of the second lens 270 for light-emitting device, because this part light energy ratio is smaller, so be acceptable in some occasions, such as long sight occasion.In order to reduce light loss, the area of the first speculum should be as far as possible small, as long as being enough to receive the exciting light for carrying out self-focus lenses.

（Three）Light-emitting device 200 also includes diffusion sheet 280, for exciting light scattering to the collimation for carrying out self-focus lenses, and outgoing is to the first speculum of light guiding piece 240.Diffusion sheet 280 is in order that laser one small angle of divergence of formation, it can so to focus on the laser facula homogenization on material for transformation of wave length, improve the efficiency of material for transformation of wave length, therefore diffusion sheet 280 can be arranged on any position of the collimation lens 220 to the light path of Wavelength converter 260, be preferably provided in the light path between collimation lens and the first lens.

Relative to prior art, the first speculum is arranged between the first lens and the second lens by the present embodiment so that first laser device can be arranged between the second lens and the first lens without being arranged on the periphery of the second lens, and structure is more compact.And, the characteristics of etendue for the emergent light that the present embodiment is much smaller than Wavelength converter using the etendue of incident laser, independent design area is smaller on the first lens, upper table face curvature becomes the firstth big area to receive laser, and make Laser Focusing on Wavelength converter, design area is larger on the first lens, the secondth constant area of upper table face curvature collect most of emergent light of Wavelength converter, therefore most of emergent light will not become more straight, so that the first lens to the distance between the second lens is not required to lengthen, second lens are with regard to that can make most of emergent light of Wavelength converter collimate outgoing, the problem of system bulk is big in the prior art so as to real solution.

In the present embodiment, the firstth area of the first lens 250 is arranged on the center of the first lens, and the first speculum is arranged on the over top of the first lens, and incident laser is bent 90 degree of first areas 251 for reflexing to the first lens by the first speculum.In other embodiments, the firstth area of the first lens can also be arranged on the edge or other positions of the first lens, and the first speculum can also be correspondingly disposed in other positions, and incident laser can also be bent other angles by the first speculum.

Embodiment three

Referring to Fig. 4, Fig. 4 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 4, light-emitting device 300 includes first laser device 310, collimation lens 320, light guiding piece 340, the first lens 350, Wavelength converter 360, the second lens 370 and diffusion sheet 380.

The present embodiment in place of the difference of embodiment two with being：

The present embodiment eliminates the second speculum, and changes the firstth area of the first lens and the position of the first speculum.Specifically, the first speculum of light guiding piece 340 is positioned close to the position at the edge of the second lens 370, to cause laser from the marginal incident of the first lens 350, the first area 351 of the first lens 350 also relative set at the edge of the first lens homonymy.More specifically, for the first lens are compared to planoconvex spotlight, top surface edge has projection.Light distribution due to the light from material for transformation of wave length outgoing in space is substantially distributed in Lambert cosine：Light intensity at centre normal is most strong, and the bigger local light intensity of angle is weaker, therefore the first speculum to light guiding piece 340 is arranged such with the first area 351, can reduce the energy loss that Stimulated Light is reflected by the first speculum.

From this example, it can be seen that the first speculum can also be omitted, as long as the putting position and angle of adjustment first laser device 310 and collimation lens 320 so that the first lens 350 are penetrated in the laser straight access of collimation lens outgoing.Equally, in embodiment two, first speculum is also dispensed, as long as first laser device 210 and collimation lens 220 to be placed on to the surface of the first lens 250, certainly, the first laser device and collimation lens for trying one's best small from volume are now needed, to reduce their stops to the first lens emergent light as far as possible.

Example IV

Referring to Fig. 5, Fig. 5 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 5, light-emitting device 400 includes first laser device 410, collimation lens 420, the second speculum 430, light guiding piece 440, the first lens 450, Wavelength converter 460, the second lens 470 and diffusion sheet 480.

（One）In order to reduce light loss, in the present embodiment, first speculum of light guiding piece 240 is small optical filter, the small optical filter has reflected excitation light and transmits the attribute of Stimulated Light, carry out the exciting light of self-focus lenses 420 for reflecting, and the Stimulated Light for collecting first the firstth area of lens 451 is transmitted through the second lens 470 along the second light path, such as reflection blue excites light transmission yellow Stimulated Light.Now the Stimulated Light of the outgoing of the firstth area 451 of the first lens 450 can also be incident to the second lens 470.

（Two）Because the Stimulated Light of the outgoing of the firstth area 451 of the first lens 450 has been directional light, so can be dissipated after the second lens in embodiment two, and can not be by second collimated, although this part light be not carried out the collimating effect of design, but the ratio that light energy accounts for total light energy is relatively low, therefore it is acceptable to be not carried out collimating effect in some application scenarios.For it is this do not meet design the problem of, in the present embodiment, the second lens 470 also include the first area 471 and the second area 472 with the first lens 450 correspondingly.The Stimulated Light of the outgoing of the firstth area 451 of first lens 450 after the small optical filter of light guiding piece 440 outgoing to the first area 471 of the second lens 470, two surfaces that first area 471 of the second lens 470 is relative are parallel to each other, it is specially two parallel curved surfaces in the present embodiment, so that the direction of the collimated light in the first area 451 from the first lens will not change, directional light is still.The emergent light for the Wavelength converter 460 that second area 452 of the first lens is collected, this there is the Stimulated Light of certain dispersion angle to be collimated into parallel light emergence by the second area 472 from the air outgoing around small optical filter to the second lens, the second area 472 of the second lens.

In the present embodiment, by carrying out subregion to the second lens, so that while the light of the secondth area outgoing of the first lens is collimated into directional light, direction will not be changed by making the directional light of the firstth area outgoing of the first lens, so that the emergent light of the second lens is directional light, light extraction collimation is improved.

Embodiment five

Referring to Fig. 6, Fig. 6 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in fig. 6, light-emitting device 500 includes first laser device 510, collimation lens 520, the second speculum 530, light guiding piece 540, the first lens 550, Wavelength converter 560, the second lens 570 and diffusion sheet 580.

It is in place of the difference of the present embodiment and example IV：

Second lens 570 are planoconvex spotlight, and the upper surface in the first area 571 of the second lens is the plane parallel with the lower surface of planoconvex spotlight.In the present embodiment, by carrying out subregion to the second lens, so that while the light of the secondth area outgoing of the first lens is collimated into directional light, direction will not be changed by making the directional light of the firstth area outgoing of the first lens, so that the emergent light of the second lens is directional light, light extraction collimation is improved；Meanwhile, the second lens use planoconvex spotlight, therefore the firstth area of the second lens only needs to do the operation polished in upper surface and can just realize the purpose parallel with lower surface, makes relatively simple.

Although example IV can realize that all emergent lights are directional light with embodiment five, there is problems with.For convenience of description, the emergent light of light-emitting device is represented with 6 band arrow solid lines in Fig. 6, from left to right numbering is followed successively by 91-96.Light 91,92 is the light of the outgoing of the secondth area 572 by the second lens 570, and wherein light 92 is close to the first area 571 and the border in the second area 572；Light 93 and 94 is the light of the outgoing of the firstth area 571 by the second lens 570, and wherein light 93 is close to the left margin in the first area 571, right margin of the light 94 close to the first area 571.92 and 93 two light are observed, two light are all close to the intersection in the firstth area and the secondth area, but light 92 is after the secondth area outgoing of the first lens 550, and the angle of divergence of light 92 is more than the angle of divergence of the light 93 from the firstth area outgoing of the first lens 550（Because light 93 is entirely collimated by the firstth area of the first lens）, therefore this two light reach after one section of propagation distance after the second lens 570, just have one it is intersegmental away from.After the second lens 570, light 92 is collimated, the outgoing parallel with light 93, but spacing between the two is still present.It is axisymmetric so to consider system, and the hot spot of outgoing will form Crape ring in the position between this two light, that is, this position does not have a light outgoing, and the light in the firstth area and the secondth area does not all have.In order to solve this problem, the embodiment of the present invention proposes embodiment six.

Embodiment six

Referring to Fig. 7, Fig. 7 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in fig. 7, light-emitting device 600 includes first laser device 610, collimation lens 620, the second speculum 630, light guiding piece 640, the first lens 650, Wavelength converter 660, the second lens 670 and diffusion sheet 680.

The present embodiment in place of the difference of embodiment five with being：

Relative two surface in the firstth area of the second lens 670 is no longer parallel, but two confocal curved surfaces, and in the two confocal curved surfaces, light path rear end surface 671a area is more than the area of end curved surface 671b before light path, therefore the two curved surfaces constitute beam-expanding system.

4 band arrow solid lines represent the emergent light of light-emitting device in Fig. 7, and from left to right numbering is followed successively by 91-94.Light 91,92,94 is the light of the secondth area outgoing by the second lens 670, and wherein light 92 is close to the firstth area and the border in the secondth area；Light 93 is the light of the firstth area outgoing by the second lens 670, and close to the left margin in the firstth area.The priority of light 93 passes through end curved surface 671b and light path rear end surface 671a before light path, the lifting of light collimation（The angle of divergence diminishes）Light beam expands, and the border of light 92 after the secondth area outgoing with the second lens 670 is mutually made up, so as to avoid or weaken Crape ring phenomenon.

Embodiment seven

Referring to Fig. 8, Fig. 8 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 8, light-emitting device 700 includes first laser device 710, collimation lens 720, the second speculum 730, light guiding piece 740, the first lens 750, Wavelength converter 760, the second lens 770 and diffusion sheet 780.

The present embodiment in place of the difference of embodiment six with being：First lens 750 are lens group, including collecting lens 750a and lenslet 750b, collecting lens 750a includes the firstth area and the secondth area, lenslet 750b and collecting lens 750a the firstth area constitutes the firstth area of the first lens 750, and collecting lens 750a the secondth area constitutes the secondth area of the first lens 750.The present embodiment is with the functions that combines firstth area to realize in embodiment six first lens of the lenslet 750b with collecting lens 750a so that lens are easier processing.Furthermore it is possible to collecting lens 750a and lenslet 750b is glued together, to fix lenslet 750b.

Embodiment eight

The various embodiments described above have the first lens of projection to illustrate with upper surface, it was found from the principle of the present invention, for the secondth area of the first lens, firstth area of the first lens needs faster to converge light, that is to say, that the firstth area of the first lens is more shorter than the focal length in the secondth area in optical design.Therefore, the first lens of the invention can also have other design methods, as long as can realize that its firstth area is shorter than the focal length in the secondth area.For ease of understanding, the present invention also provides other design methods of the first lens.Referring to Fig. 9, Fig. 9 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 9, light-emitting device 800 includes first laser device 810, collimation lens 820, the second speculum 830, light guiding piece 840, the first lens 850, Wavelength converter 860, the second lens 870 and diffusion sheet 880.

For first lens 850 are compared to planoconvex spotlight, there is projection in lower surface center, and the projection above projection with partly constituting the first area 851, therefore the focal length in the area of focal distance ratio second in the first area 851 of the first lens is short.In fact, first lens of the present embodiment are relative to planoconvex spotlight of the prior art, the following table face curvature in the firstth area of the first lens becomes big, and the following table face curvature in the secondth area is constant.Identical with example IV, the projection of the first lens lower surface can also be arranged on edge or other positions.

The characteristics of the present embodiment is the etendue for the emergent light for being much smaller than Wavelength converter using the etendue of incident laser, independent design area is smaller on the first lens, following table face curvature becomes the firstth big area to receive laser, and make Laser Focusing on Wavelength converter, design area is larger on the first lens, the secondth constant area of following table face curvature collect most of emergent light of Wavelength converter, and the second lens are collimated to most of emergent light, therefore the secondth area of the first constant lens of curvature is depended on from the first lens to the distance between the second lens, rather than curvature becomes the firstth big area, therefore the distance is not required to lengthen, second lens are with regard to that can make most of emergent light of Wavelength converter collimate outgoing.Therefore, the present embodiment veritably solves the problem of system bulk is big in the prior art.Also, the spot size that the present embodiment focuses to Wavelength converter is more much smaller than the spot size of initial scheme.

Embodiment nine

Referring to Fig. 10, Figure 10 is the structural representation of the first lens of another embodiment of light-emitting device in the embodiment of the present invention.As shown in Figure 10, for the first lens 950 are compared to planoconvex spotlight, bottom surface is concave surface, and upper face center has projection, the first area 951 is partly constituted below the projection and projection, other parts are the second area 952, to cause the focal length in the area of focal distance ratio second in the firstth area short.Because the incidence angle that the emergent light of Wavelength converter is incident in concave surface is smaller relative to the incidence angle for being incident in plane, accordingly, with respect to the first lens bottom surface be plane embodiment, the Fresnel loss of the first lens surface in the present embodiment（Reflection loss）It is smaller.Certainly, the bottom surface of the first lens is to be easily worked for the benefit of plane.

Embodiment ten

Embodiment two distinguishes the exciting light of incidence and the light path of Wavelength converter emergent light in the following way into embodiment nine,：First speculum reflected excitation light to the first lens, air of the emergent light through the first mirror environment of the Wavelength converter of the secondth area collection of the first lens is transmitted through the second lens.It is understood that can also distinguish in turn, i.e., exciting light is guided to be incident to the first lens by transmiting, by reflecting come the emergent light outgoing of guide wavelength conversion equipment to the second lens.Specifically, Figure 11 is referred to, Figure 11 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 11, light-emitting device 1000 includes first laser device 1010, collimation lens 1020, light guiding piece 1040, the first lens 1050, Wavelength converter 1060, the second lens 1070 and diffusion sheet 1080.

The present embodiment in place of the difference of embodiment two with including：

Firstth area of light guiding piece 1040 is loophole 1041, and the secondth area is the speculum 1042 around loophole.Loophole 1041 is transmitted through the first area 1051 of the first lens 1050 for the exciting light of self-focus lenses in future 1020 along the first light path, speculum 1042 is used for the major part of the emergent light for the Wavelength converter 1060 for collecting the first lens, i.e. the emergent light for the Wavelength converter that first the secondth area of lens is collected reflexes to the second lens 1070 along the second light path.Herein it should be noted that loophole herein is for the laser from first laser device to be transmission, it is not offered as all transmiting any light.

The loophole 1041 of light guiding piece 1040 is simplest to be achieved in that through hole；But now, the emergent light meeting via through holes for the Wavelength converter 1060 that the first area 1051 of the first lens 1050 is collected escape.Therefore in order to reduce this partial loss, firstth area of light guiding piece, i.e. loophole 1041 is preferably the small optical filter with transmission exciting light and reflection Stimulated Light attribute, the small optical filter is used to transmit the exciting light for carrying out self-focus lenses, and the Stimulated Light for being additionally operable to collect in the area of the first lens 1,050 first reflexes to the second lens 1070 along the second light path.

Technical characteristic in the various embodiments described above can be applied equally in the present embodiment with function, for example：It is same as in example IV and embodiment five, the present embodiment, the second lens 1070 can also include the firstth area and the secondth area；Firstth area of the Stimulated Light of the outgoing of the firstth area 1051 of first lens through light guiding piece, outgoing is to the firstth area of the second lens 1070 after i.e. small optical filter 1041, two faces in the firstth area of the second lens 1070 are parallel to each other so that the collimated light direction in the firstth area from the first lens will not change.The emergent light for the Wavelength converter 1060 that secondth area of the first lens 1050 is collected, from the secondth area of light guiding piece, the i.e. outgoing of speculum 1042 to the secondth area of the second lens 1070, and collimates outgoing by the secondth area of the second lens.

For another example, it is same as in embodiment six and embodiment seven, the present embodiment, the second lens 1070 can also include the firstth area and the secondth area；Firstth area of the Stimulated Light of the outgoing of the firstth area 1051 of first lens 1050 through light guiding piece, outgoing is to the firstth area of the second lens 1070 after i.e. small optical filter 1041, two surfaces that firstth area of the second lens is relative are two confocal curved surfaces, and the area of light path rear end surface is more than the area of end curved surface before light path, therefore two curved surfaces constitute beam-expanding system.The emergent light for the Wavelength converter that secondth area of the first lens 1050 is collected, from the secondth area of light guiding piece, the i.e. outgoing of speculum 1042 to the secondth area of the second lens 1070, and collimates outgoing by the secondth area of the second lens.

Light guiding piece in the present embodiment can be located at the side of the first lens and the second lens, compared to the first speculum being located in above-described embodiment between the first lens and the second lens, and the light guiding piece in the present embodiment is easier fixed with installing.

Embodiment 11

The embodiment of the present invention also provides another embodiment, and light-emitting device also includes focus control in the embodiment, and the first lens are fixed on the focus control, and the focus control is used to adjust the distance from the first lens to Wavelength converter.Refer to Figure 12, Figure 12 be light-emitting device in the embodiment of the present invention another embodiment in focus control structural representation.

As shown in figure 12, the both sides of the first lens 1150 grow a support 1153 respectively, and focus control is symmetrically arranged with two skewed slots 1191, the first lens 1150 are fixed on two skewed slots 1191 of focus control by two supports 1153 in cylindrical on its side wall.Leader 1192 is fixed with the wall of focus control side, the handle is rotated, the side wall of focus control can be rotated.Also, support 1153 is in the horizontal direction by immobilising device（Not shown in figure）Fix and can not translate, when rotating the handle 1192 of focus control, the skewed slot 1191 of focus control is and then rotated, support 1153 is motionless in the horizontal direction, in the vertical direction followed by the rotation of skewed slot 1191 and be raised and lowered, thus the first lens 1150 followed by the rotation of skewed slot and be raised and lowered, so that the first lens are remote or close to Wavelength converter.For example, when rotating clockwise handle 1192, skewed slot 1191 is rotated clockwise, and support 1153 is motionless in the horizontal direction, thus the lens of support 1153 and first are raised with the rotation of skewed slot 1191.

Usually, it is conventional technology from lens focus defocus to make light source, but has especially good effect in the present invention.When being reduced when the first lens because of skewed slot rotation, first lens are close to Wavelength converter, laser just has the effect of first time defocus when being incident in material for transformation of wave length, hot spot i.e. on material for transformation of wave length becomes big, then the first lens and the second lens are also the collection of defocus when collecting this hot spot after becoming greatly, so beam divergence angle just becomes much larger.That is, the position of mobile first lens generates the effect of defocus twice, such beam divergence angle is more sensitive for the displacement of the first lens so that beam divergence angle is more easily adjusted.

Embodiment 12

In the various embodiments described above, the most of outgoing of emergent light for the Wavelength converter that the first lens are collected is to the second lens, and the second lens are used to control the emergent light to collimate outgoing.In other embodiments, the second lens can be used for controlling the emergent light from Wavelength converter to focus on outgoing.Figure 13 specifically is referred to, Figure 13 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 13, light-emitting device 1200 includes first laser device 1210, collimation lens 1220, the second speculum 1230, light guiding piece 1240, the first lens 1250, Wavelength converter 1260, the second lens 1270 and diffusion sheet 1280.

In the present embodiment, light-emitting device also includes the 3rd lens 1290 positioned at the second lens light path rear end, after emergent light from the area of the first lens 1,250 second is transmitted through the second lens 1270 through the air of the first mirror environment, the second lens 1270 and the 3rd lens 1290 are common by emergent light focusing outgoing.It is understood that in other embodiments, the 3rd lens can also be omitted, the emergent light from Wavelength converter is only controlled to focus on outgoing by the second shorter lens 1270 of focal length.Also, the second lens can also be designed so that it is used to control the emergent light from Wavelength converter to realize other specific light distributions in addition to collimation, focusing, the light distribution of such as automobile lamp.

Similarly, can be by designing the second lens so that the second lens in embodiment illustrated in fig. 11 are used to control the emergent light from Wavelength converter to focus on outgoing.

Embodiment 13

In the various embodiments described above, the effect of the second lens is for controlling the emergent light from Wavelength converter to realize specific light distribution.The function of second lens can also be realized with other light-operated products, illustrate another form of light-operated product with another embodiment below.Figure 14 is referred to, Figure 14 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 14, light-emitting device 1300 includes first laser device 1310, collimation lens 1320, the second speculum 1330, light guiding piece 1340, the first lens 1350, Wavelength converter 1360 and diffusion sheet 1380.

In the present embodiment, light-operated product is not the second lens, but reflective surface 1370.The emergent light for the Wavelength converter 1360 that the area of first lens 1,350 second is collected, the air through the first mirror environment is transmitted through reflective surface 1370, and the reflective surface is used for the light distribution for controlling the emergent light from Wavelength converter to realize automobile lamp.The light distribution of automobile lamp has the standard determined in the prior art, does not repeat herein.In other embodiments, can also by designing reflective surface, make reflective surface be used for control the emergent light from Wavelength converter realize other specific light distributions such as collimation, focusing.

Embodiment 14

Figure 15 is referred to, Figure 15 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.As shown in figure 15, light-emitting device 1400 includes first laser device 1410, collimation lens 1420, light guiding piece 1440, the first lens 1450, Wavelength converter 1460 and diffusion sheet 1480.

The present embodiment in place of the difference of embodiment ten with including：

（One）In the present embodiment, light guiding piece 1440 is reflective surface, and the firstth area of light guiding piece 1440 is loophole 1441, and the secondth area is the speculum 1442 around loophole, and speculum 1442 is reflecting curved surface.

（Two）In the present embodiment, light guiding piece 1440 is also light-operated product, i.e., light-operated product is integrated with light guiding piece.The whole outgoing of emergent light for the Wavelength converter that first lens 1450 are collected to light guiding piece 1440, wherein, the emergent light outgoing of the Wavelength converter that first the secondth area of lens is collected to light guiding piece 1440（Light-operated product）Reflecting curved surface 1442, the reflecting curved surface 1442 is used to control the emergent light from Wavelength converter to realize the light distribution of automobile lamp.In other embodiments, can also by designing reflective surface 1442, make reflective surface be used for control the emergent light from Wavelength converter realize other specific light distributions such as collimation, focusing.

The technical problem that the various embodiments described above are solved is, when needing the wide-angle for collecting Wavelength converter outgoing to be distributed light, the bulky problem that light-emitting device is present.It is understood that the present invention is not limited in being distributed the Wavelength converter of light for outgoing wide-angle, and other devices that outgoing wide-angle is distributed light are equally applicable to, such as scattering device.In fact, the second laser for the outgoing second laser mentioned in embodiment one, such as red laser, Wavelength converter is for the second laser that is, scattering device.Therefore, the Wavelength converter in the various embodiments described above can be substituted for scattering device, and now, the laser of first laser device outgoing needs not be exciting light.

The light-emitting device that Wavelength converter is substituted for into scattering device includes first laser device, collimation lens, the first lens and scattering device；First laser device is used for shoot laser to collimation lens, and collimation lens is used to collimate the laser；First lens include the firstth area and the secondth area, the light-receiving area in the firstth area is less than the 1/2 of the light-receiving area in the secondth area, the focal length in the focal distance ratio in firstth area secondth area is short, carrys out the laser light incident of self-focus lenses to firstth area, firstth area is used for the Laser Focusing to scattering device；It is scattered light that scattering device, which is used for laser light scattering, and it is included to the firstth area and the secondth area that the emergent light of the scattered light reflexes to the first lens；First lens are additionally operable to collect emergent light and the outgoing of scattering device incident thereon.Herein, the light-receiving area in first the firstth area of lens refers to that the emergent light of scattering device is incident on the surface area in the firstth area covered during firstth area, and the light-receiving area in first the secondth area of lens refers to that the emergent light of scattering device is incident on the surface area in the secondth area covered during secondth area.

The embodiment of the present invention is by by the first lens are divided into shorter focal length, less firstth area of light-receiving area and focal length is longer, light-receiving area is larger the secondth area, not only exciting light is caused to focus to scattering device by the firstth shorter area of focal length, and most of emergent light of scattering device can longer, light-receiving area is larger by focal length the secondth area collect, therefore most of emergent light of the scattering device of the first lens outgoing will not be straightened, the problem of system bulk is big in the prior art so as to real solution.

The light-emitting device that Wavelength converter is substituted for into scattering device can possess structure and function in the various embodiments described above, and detailed description refer to the various embodiments described above, only simply enumerate some herein：

Alternatively, the light-emitting device for Wavelength converter being substituted for into scattering device also includes light-operated product, and at least most of outgoing of emergent light for the scattering device that the first lens are collected is to the light-operated product, and the light-operated product is used to control the emergent light to realize specific light distribution.Light-operated product can be the second lens, reflecting curved surface or other can realize the optical element of specific light distribution.

Alternatively, the light-emitting device that Wavelength converter is substituted for into scattering device also includes light guiding piece, laser for self-focus lenses in future is guided to the firstth area of the first lens along the first light path, and at least most of of emergent light for the scattering device that the first lens are collected is guided to light-operated product along the second light path.

Light guiding piece can be the attribute that now light splitting optical filter should reflect with the laser part transmissive portion to first laser device such as the light splitting optical filter in embodiment one.Light guiding piece can also be the light guiding piece for being divided into the firstth area and the secondth area as in other embodiments.Therefore, alternatively, light guiding piece includes the firstth area and the secondth area, the light-receiving area in firstth area is less than the 1/2 of the light-receiving area in the secondth area, the laser that firstth area is used for self-focus lenses in future is guided to the firstth area of the first lens along the first light path, and the emergent light that secondth area is used for the scattering device for collecting first the secondth area of lens is guided to light-operated product along the second light path.Firstth area of light guiding piece is the first speculum, and the secondth area is the light transmission medium of the first mirror environment；Or, the firstth area of light guiding piece is loophole, and the secondth area is the speculum around loophole.

Can also be identical with embodiment 14, the firstth area of light guiding piece is loophole, and the secondth area is the speculum around loophole, and the speculum is reflecting curved surface；It is also light-operated product with time guiding piece.

Alternatively, Wavelength converter is substituted in the light-emitting device of scattering device, for the first lens are compared to planoconvex spotlight, bottom surface is plane or concave surface, and there is projection upper surface, the projection and the firstth area that the first lens are partly constituted below projection.

Alternatively, the light-emitting device that Wavelength converter is substituted for into scattering device also includes second laser and corresponding collimation lens, the laser of first laser device outgoing is distinguished after collimated collimated with the laser of second laser outgoing, is combined into beam of laser and is incident to the firstth area of the first lens；Scattering device is additionally operable to scatter the laser from second laser.Second laser can be red laser, green laser or infrared laser

Alternatively, the light-emitting device for Wavelength converter being substituted for into scattering device also includes focus control, and the first lens are fixed on the focus control, and the focus control is used to adjust the distance from the first lens to scattering device.

Embodiment 15

In embodiment one, if light splitting optical filter is all reflected exciting light, the exciting light do not changed of Wavelength converter outgoing can not outgoing to the second lens, light-emitting device can not outgoing Stimulated Light and exciting light mixed light；If light splitting optical filter is transmitted to exciting light part reflecting part, although the exciting light do not changed has part light can be with outgoing to the second lens, the exciting light from first laser device has part light to transmit light splitting optical filter and cause light loss.For this, the present invention also provides another embodiment, in the embodiment, there are two the first lens, second lens and a light-dividing device, incident laser is divided into two parts by light-dividing device, be separately directed to two the first lens, two the first lens respectively guide this two parts incident laser to Wavelength converter and scattering device, the emergent light of Wavelength converter and the emergent light of scattering device after light-dividing device closing light outgoing to the second lens.For ease of distinguishing, two the first lens are referred to as the first lenslet and the second lenslet below, the second lens are referred to as big lens.

Figure 16 a are referred to, Figure 16 a are the structural representations of another embodiment of light-emitting device in the embodiment of the present invention.As illustrated in fig 16 a, light-emitting device 1500 includes first laser device 1510a, the first collimation lens 1520a, second laser 1510b, the second collimation lens 1520b, speculum 1530a, optical filter 1530b, light-dividing device 1540, the first lenslet 1550a, the second lenslet 1550b, first wave length conversion equipment 1560a, scattering device 1560b, big lens 1570 and diffusion sheet 1580.First lenslet 1550a, the second lenslet 1550b structure and function are with reference to the first lens in the various embodiments described above, structure and the second lens in function reference the various embodiments described above of big lens 1570.

First laser device 1510a is used for the light of outgoing first to the first collimation lens 1520a, the first collimation lens 1520a for collimating first light；Second laser 1510b is used for the light of outgoing second to the second collimation lens 1520b, and the second collimation lens is used to collimate second light, and the first light and the second light are exciting light（For example it is blue light）.

The reflected mirror 1530a of the first light after first collimation lens 1520a collimations reflexes to optical filter 1530b side, the opposite side of the incident optical filter 1530b of the second light after second collimation lens 1520b collimations, optical filter 1530b is used to transmit first light and reflects second light, first light and second is photosynthetic for after light beam, outgoing is to diffusion sheet 1580, and diffusion sheet 1580 is by outgoing after first light and the second light scattering to light-dividing device 1540.

Light-dividing device 1540 is used for the second light of the first light and the second collimation lens 1520b outgoing that the first collimation lens 1520a outgoing is received from diffusion sheet 1580, and the first light and the equal fractional transmission part of the second light are reflected, the first light and the second smooth outgoing are guided to the first lenslet 1550a the firstth area and the second lenslet 1550b the firstth area.

First lenslet 1550a the firstth area is used to the first light and the second light from light-dividing device 1540 focusing to first wave length conversion equipment 1560a；Second lenslet 1550b the firstth area is used to the first light and the second light from light-dividing device 1540 focusing to scattering device 1560b.

It is the first Stimulated Light that first wave length conversion equipment 1560a, which is used for the first light and the second light wavelength conversion from the first lenslet 1550a, and first Stimulated Light is reflexed into the first lenslet 1550a；First lenslet 1550a is used to collect first Stimulated Light to light-dividing device 1540.It is scattered light that scattering device 1560b, which is used for the first light from the second lenslet 1550b and the second light scattering, and the scattered light is reflexed into the second lenslet 1550b；Second lenslet 1550b is used to collect the scattered light to light-dividing device 1540.

Light-dividing device 1540 is used for the first Stimulated Light for transmiting the first lenslet 1550a outgoing, reflects some scattered light of the second lenslet 1550b outgoing, so that the part of this two-way light is photosynthetic for a branch of closing light（Because the scattered light of the second lenslet outgoing has part light and is transmitted through diffusion sheet 1580 through light-dividing device）, and outgoing is to big lens 1570.Big lens 1570 are used in the closing light, and the scattered light in first Stimulated Light in the secondth area from the first lenslet 1550a and the secondth area from the second lenslet collimates outgoing.

Because light path is reversible, the first Stimulated Light of the first lenslet 1550a the firstth area outgoing has been collimated light, and collimated light outgoing after light-dividing device 1540, to big lens 1570, can be dissipated by big lens 1570, and can not be collimated by big lens 1570.The scattered light of second lenslet 1550b the firstth area outgoing is equally collimated light, it is impossible to collimated by big lens 1570.

Identical with the various embodiments described above, the present embodiment veritably solves the problem of system bulk is big in the prior art, meanwhile, the present embodiment focuses to Wavelength converter and the spot size of scattering device is more much smaller than the spot size of initial scheme.Also, light-dividing device is reflected exciting light fractional transmission part, not only allows the exciting light of Wavelength converter outgoing to have part light to be transmitted through big lens through light-dividing device so that light-emitting device can be with outgoing Stimulated Light and the mixed light of exciting light；And after the exciting light fractional transmission light-dividing device from laser, it is scattered light to have scattering device scattering, and the scattered light has part light can also be through light-dividing device outgoing to big lens, therefore reduces light loss.It is can be seen that from the derivation for outgoing mixed light and reduce light loss, as long as there is first laser device, second laser set out above, only to facilitate illustrating following more preferably scheme.

In the present embodiment, it is preferable that light-dividing device is in different Transflective ratios, firstth area in the firstth area and the second lenslet of the first light of guiding and the second smooth outgoing to the first lenslet.For example, 1540 pair of first reflection of light transmission 20% 80% of light-dividing device, to the second light transmission 10% reflection 90%.Because light-dividing device is different to the Transflective ratio of the first light, the second light, it therefore, it can the luminous power of the emergent light by changing first laser device and/or second laser（For example by way of the driving current or voltage that change laser）, to change light-dividing device outgoing to the emergent light ratio of the first lenslet and the second lenslet, and then the first Stimulated Light and the ratio of scattered light in light-emitting device emergent light are adjusted, so as to change the color or colour temperature of emergent light.Concrete analysis is as follows：

Assuming that the luminous power of the first light and the second light is respectively p and q, the transmissivity of 1540 pair of first light of light-dividing device is a, reflectivity is 1-a, light-dividing device is b to the transmissivity of the second light, reflectivity is 1-b, and the first light of the outgoing of light-dividing device 1540 to the first lenslet 1550a and the luminous power of the second light are x, and the first light of the outgoing of light-dividing device 1540 to the second lenslet 1550b and the luminous power of the second light are y, then x=p (1-a)+q (1-b), y=pa+qb.Because light-dividing device is different to the Transflective ratio of the first light, the second light, i.e. a ≠ b, so changing p and/or q, can change y/x, and then adjust the first Stimulated Light and the ratio of scattered light in light-emitting device emergent light, so as to change the color or colour temperature of emergent light.Also, color or colour temperature are adjusted by way of adjusting driving current or driving voltage, not only fast and easy, and it is more accurate.

Specifically, in the present embodiment, first laser device 1510a and second laser 1510b is wavelength identical blue laser, and two lasers are positioned orthogonally with respect to each, first light of first laser device 1510a outgoing is P polarization light relative to the plane of incidence of light-dividing device 1540, and the second light of second laser 1510b outgoing is S-polarization light relative to the plane of incidence of light-dividing device 1540.Optical filter 1530b has the attribute of transmitting P-type polarisation light reflection S-polarization light.The reflected mirror 1530a of P polarization light of first laser device 1510a outgoing reflexes to optical filter 1530b, the S-polarization light of second laser 1510b outgoing is incident to optical filter 1530b, optical filter 1530b by P polarization light and S-polarization it is photosynthetic be a branch of closing light, and shine on diffusion sheet 1580.

The incident P polarization light of 1540 pairs of light-dividing device realizes fractional transmission and reflection, and fractional transmission and reflection are also realized to incident S-polarization light, but different to the Transflective ratio of both polarised lights.For example, referring to Figure 16 b, Figure 16 b are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident P polarization light and S-polarization light.In Figure 16 b, abscissa is wavelength, and ordinate is transmissivity, and the solid line curve of spectrum is the curve of spectrum to P polarization light, and the dotted line curve of spectrum is the curve of spectrum to S-polarization light.As can be seen that for wave-length coverage in 440nm-460nm blue light, light-dividing device is 30% or so to the transmissivity of incident P polarization light, and reflectivity is 70% or so from Figure 16 b, the transmissivity to incident S-polarization light is 10% or so, and reflectivity is 90% or so.

First wave length conversion equipment 1560a is specially yellow fluorescent powder, and the blue laser from the first light path is changed into yellowly Stimulated Light, and the yellow Stimulated Light is wavelength-converted device 1560a reflections and through the first lenslet 1550a to light-dividing device 1540.Scattering device 1560b is scattered to incident blue laser, and the blue scattered light is reflected by scattering device 1560b and through the second lenslet 1550b to light-dividing device.

The yellow Stimulated Light of the transmission peak wavelength conversion equipment 1560a of light-dividing device 1540 outputs, the blue scattered light in part of reflective scattering device 1560b outputs, beam of white light is mixed into by the blue scattered light and yellow Stimulated Light, and outgoing is the emergent light of light-emitting device.In this specific embodiment, the natural quality that can be separated to the plated film curve of p-polarization light and s polarised lights using light-dividing device, to realize Transflective ratio that light-dividing device is different from the second light to the first light, so as to which not only the p-polarization light of outgoing and the luminous power of s polarised lights can be distinguished by adjusting two lasers, and then adjust outgoing blue light ratio of the light-dividing device from the first lenslet and the second lenslet, finally the color or colour temperature of emergent light are changed, and also avoid the strict control to light-dividing device coating process.

Light-dividing device 1540 guides part exciting light to scattering device from the second lenslet 1550b, and this part exciting light proportion is smaller, and that is capable of return laser light device ratio when being reflected back light-dividing device by scattering device is just smaller, otherwise bigger.Therefore, in order to reduce the loss that scattered light return laser light device is caused, preferably, in the second smooth two-way light that the first light that first laser device is sent and second laser are sent, light-dividing device at least guides light outgoing to be all the way more than 0 and less than 0.5 to the ratio of the second lenslet；I.e. the guiding of light-dividing device 1,540 first smooth outgoing to the second lenslet 1550b light accounts for the ratio of the first light more than 0 and less than 0.5；Or/and, the ratio that guiding the second smooth outgoing to the second lenslet 1550b light of light-dividing device 1540 accounts for the second light is more than 0 and less than 0.5.For example, in the present embodiment, the transmissivity of the incident P polarization light of 203 pairs of light-dividing device is more than 0 and less than 50%, to the transmissivity of incident S-polarization light also greater than 0 and less than 50%.

In the present embodiment, light-dividing device specifically uses polarization spectro, in other embodiments, it would however also be possible to employ wavelength light splitting.Specifically, the first light of first laser device 1510a and second laser 1510b outputs is identical with the polarization characteristic of the second light, but wavelength is different.Now the first light has different first wave length and second wave length respectively from the second light, and optical filter 1530b reflects the wavelength Multiplexing apparatus of second wave length for transmission first wave length.The exciting light of 1540 pairs of two kinds of different wave lengths of light-dividing device has different Transflective ratios.For example, referring to Figure 16 c, Figure 16 c are optical filtering curve of spectrum schematic diagram of the light-dividing device to incident different wavelengths of light.In Figure 16 c, abscissa is wavelength, and ordinate is transmissivity.As can be seen that light-dividing device is different from the transmissivity of wavelength b2 light to wavelength b1 from Figure 16 c.Now, the driving current that drive circuit adjusts two lasers is again may be by, to adjust light-dividing device outgoing to the emergent light ratio of the first lenslet and the second lenslet, and then the color or colour temperature of last output light is adjusted.In this specific embodiment, the natural quality that can be separated to the plated film curve of different wavelengths of light using light-dividing device, to realize Transflective ratio that light-dividing device is different from the second light to the first light, so that not only can be by adjusting the luminous power that two lasers distinguish two kinds of wavelength lights of outgoing, finally the color or colour temperature of emergent light are changed, and also avoid the strict control to light-dividing device coating process.

It is understood that speculum 1530a can also be omitted, as long as adjustment first laser device 1510a and the first collimation lens 1520a putting position and angle so that optical filter 1530b is penetrated in the laser straight access of the first collimation lens 1520a outgoing.Even, should not ask emergent light spot try one's best it is small in the case of, optical filter 1530b is also dispensed, and now first laser device 1510a and the direct shoot lasers of second laser 1510b be to diffusion sheet, and two hot spots side by side and in close proximity to and be combined into a large spot.

In the present embodiment, first wave length conversion equipment 1560a is reflective, can include reflective with setting wavelength conversion sheet on reflective substrates（Such as yellow fluorescent powder piece）, the Stimulated Light that wavelength conversion sheet is produced reflexes to the first lenslet 1550a by reflective.In the present embodiment, material for transformation of wave length absorbs all exciting lights, part exciting light can also be only absorbed in other embodiments, now first wave length conversion equipment is by its emergent light, that is the mixed light of the first Stimulated Light and the exciting light do not changed reflexes to the first lenslet 1550a, and light-dividing device transmits the first Stimulated Light and the partly exciting light do not changed.

In the present embodiment, the first light and the second light specifically are used for blue light, and blue scattered light is mixed into the example of white light to illustrate how the present invention changes emergent light color with yellow Stimulated Light.In other embodiments, it would however also be possible to employ the example of other colors.For example, the first light and the second light are green light, cyan scattered light is mixed into white light with red Stimulated Light；Or, the first light and the second light are blue light, and blue excitation light is mixed into purple light with red Stimulated Light；Or, the first light and the second light are respectively blue light and green light, and blue cyan scattered light is mixed into white light etc. with yellow Stimulated Light, as long as the first light and the second light can excite first wave length conversion equipment to produce the first Stimulated Light.

But do not limit the first light actually and the second light be exciting light, the first light and the second light can also only one of which be exciting light, now first wave length conversion equipment absorbs exciting light therein, and another light is scattered.Such as the first light and the second light are respectively blue light and feux rouges, blue light is together with feux rouges after the incident first wave length conversion equipment comprising yellow fluorescent powder, yellow fluorescent powder absorbs blue light and produces gold-tinted, and feux rouges is scattered, therefore the feux rouges after first wave length conversion equipment outgoing gold-tinted and scattering；Correspondingly, light-dividing device transmits the gold-tinted and feux rouges of first wave length conversion equipment outgoing, and some blue light of reflective scattering device outgoing.

In addition, identical with described in embodiment one, Wavelength converter and scattering device can use LED as substrate, material for transformation of wave length（Such as fluorescent material）Or scattering material is to coat or the mode such as pad pasting is arranged in LED light-emitting area.Or, light-emitting device can also include the 3rd laser and corresponding collimation lens, after the exciting light of 3rd laser emitting is collimated through the collimation lens, beam of laser is combined into the laser of first laser device, second laser outgoing and is incident to light-dividing device, and the firstth area guided through the light-dividing device to the firstth area of the first lenslet and/or the second lenslet so that the light of the 3rd laser is included in the emergent light of first wave length conversion equipment or scattering device；3rd laser is preferably infrared laser or red laser.Describe in detail with reference to embodiment one, do not repeat herein.

In other embodiments, first wave length conversion equipment 1560a can be exchanged with scattering device 1560b position, i.e. the reflected light of light-dividing device is incident to scattering device, and the transmitted light of light-dividing device is incident to first wave length conversion equipment；And light-dividing device is used to reflect the Stimulated Light that first wave length conversion equipment is produced, and transmit some scattered light of scattering device outgoing.

Also, in other embodiments, scattering device 1560b can also be by another Wavelength converter（Referred to herein as second wave length conversion equipment）To substitute.Now, the outgoing together with the second Stimulated Light of second wave length conversion equipment outgoing of the first Stimulated Light of first wave length conversion equipment outgoing is the emergent light of light-emitting device.For example, the first light and the second light can specifically be used for blue light, first wave length conversion equipment includes red fluorescence powder and green emitting phosphor respectively with second wave length conversion equipment, the gold-tinted that light-emitting device outgoing is mixed by red Stimulated Light with green Stimulated Light, or outgoing is by the white light of red Stimulated Light and green Stimulated Light and the blue light for not being wavelength-converted device conversion.The driving current or voltage of drive circuit two lasers of regulation are again may be by herein, to adjust light-dividing device outgoing to the emergent light ratio of the first lenslet and the second lenslet, and then the ratio of the first Stimulated Light and the second Stimulated Light in light-emitting device emergent light is adjusted, so as to change the color or colour temperature of emergent light.

In the present embodiment, so that emergent light realizes the big lens of collimation as being illustrated exemplified by light-operated product.In other embodiments, light-operated product can also be reflecting curved surface or other can realize the optical element of specific light distribution.Light-operated product can also realize other specific light distributions such as focusing, the light distribution of automobile lamp.

There can not be proposition that big lens are carried out with subregion this method in above-described embodiment by this problem of big collimated for the emergent light in the firstth area of two lenslets, detailed description refers to Fig. 5, Fig. 6, embodiment illustrated in fig. 7, only briefly described herein.

It is same as Fig. 5, embodiment illustrated in fig. 6, it is preferable that big lens 1570 include the firstth area and the secondth area, and two surfaces that the firstth area of big lens is relative are parallel to each other；The emergent light for the first wave length conversion equipment that first lenslet 1550a the firstth area is collected is after light-dividing device 1540, the firstth area of at least most of outgoing to big lens, so that light direction will not change.For example, when the emergent light of first wave length conversion equipment only has Stimulated Light, the emergent light can whole outgoing to the firstth area of big lens；When the emergent light of first wave length conversion equipment includes the first light or the second light time, emergent light major part outgoing to the firstth area of big lens.The emergent light for the first wave length conversion equipment 1560a that first lenslet 1550a the secondth area is collected is after light-dividing device, the secondth area of at least most of outgoing to big lens, and collimates outgoing by the secondth area of big lens.The emergent light for the scattering device 1560b that second lenslet 1550b the firstth area is collected is after light-dividing device, the firstth area of part outgoing to big lens, so that light direction will not change.The emergent light for the scattering device that second lenslet 1550b the secondth area is collected is after light-dividing device, the secondth area of part outgoing to big lens, and collimates outgoing by the secondth area of big lens.

Or, embodiment illustrated in fig. 6 is same as, preferably, big lens 1570 include the firstth area and the secondth area, two relative surfaces of firstth area are two confocal curved surfaces, and the area of light path rear end surface is more than the area of end curved surface before light path, therefore two curved surfaces constitute beam-expanding system.The emergent light for the first wave length conversion equipment that firstth area of the first lenslet is collected is after light-dividing device, the firstth area of at least most of outgoing to big lens；The emergent light for the first wave length conversion equipment that secondth area of the first lenslet is collected is after light-dividing device, the secondth area of at least most of outgoing to big lens, and collimates outgoing by the secondth area of the big lens.The emergent light for the scattering device that firstth area of the second lenslet is collected is after light-dividing device, the firstth area of part outgoing to big lens；The emergent light for the scattering device that secondth area of the second lenslet is collected is after light-dividing device, the secondth area of part outgoing to big lens, and collimates outgoing by the secondth area of the big lens.

In this specification, what each embodiment was stressed be between the difference with other embodiment, each embodiment identical similar portion mutually referring to.

The embodiment of the present invention also provides a kind of optical projection system, including light-emitting device, and the light-emitting device can have structure and function in the various embodiments described above.The optical projection system can use various shadow casting techniques, such as liquid crystal display（LCD, Liquid Crystal Display）Shadow casting technique, digital light processor（DLP, Digital Light Processor）Shadow casting technique.For example, the light-emitting device of above-mentioned ejecting white light can as optical projection system white light source.

The embodiment of the present invention also provides a kind of illuminator, including light-emitting device, and the light-emitting device can have structure and function in the various embodiments described above.Illuminator for example has torch for illumination system, automobile lamp illuminating system, stage lamp illuminating system etc..

It the foregoing is only embodiments of the present invention; it is not intended to limit the scope of the invention; equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made; or other related technical fields are directly or indirectly used in, it is included within the scope of the present invention.

Claims

1. a kind of light-emitting device, it is characterised in that including first laser device, collimating element, the first lens and Wavelength converter；

First laser device is used for outgoing exciting light to the collimating element, and the collimating element is used to collimate the exciting light；

First lens include the firstth area and the secondth area, the light-receiving area in firstth area is less than the 1/2 of the light-receiving area in secondth area, the focal length in the focal distance ratio in firstth area secondth area is short, exciting light from the collimating element is incident to firstth area, and firstth area is used to the exciting light focusing to the Wavelength converter；

It is Stimulated Light that the Wavelength converter, which is used at least part wavelength convert of the exciting light, and its emergent light is reflexed into the firstth area of the first lens and the secondth area；

First lens are additionally operable to collect emergent light and the outgoing of the Wavelength converter incident thereon.

2. light-emitting device according to claim 1, it is characterized in that, the light-emitting device also includes light-operated product, and at least most of outgoing of emergent light for the Wavelength converter that the first lens are collected is to the light-operated product, and the light-operated product is used to control the emergent light to realize specific light distribution.

3. light-emitting device according to claim 2, it is characterized in that, the light-emitting device also includes light guiding piece, for the exciting light from the collimating element to be guided to the firstth area of the first lens along the first light path, at least most of of emergent light for the Wavelength converter that the first lens are collected is guided to the light-operated product along the second light path.

4. light-emitting device according to claim 3, it is characterized in that, the smooth guiding piece is light splitting optical filter, the firstth area for the exciting light from the collimating element to be reflexed to the first lens along the first light path, the Stimulated Light that the first lens are collected is transmitted through the light-operated product along the second light path；Or, the firstth area for the exciting light from the collimating element to be transmitted through to the first lens along the first light path, the Stimulated Light that the first lens are collected reflexes to the light-operated product along the second light path.

5. light-emitting device according to claim 3, it is characterized in that, the smooth guiding piece includes the firstth area and the secondth area, the light-receiving area in firstth area is less than the 1/2 of the light-receiving area in the secondth area, firstth area is used to along the first light path guide the exciting light from the collimating element to the firstth area of the first lens, and the emergent light that secondth area is used for the Wavelength converter for collecting first the secondth area of lens is guided to the light-operated product along the second light path；

Firstth area of the smooth guiding piece is the first speculum, and the secondth area is the light transmission medium of the first mirror environment；Or, the firstth area of the smooth guiding piece is loophole, and the secondth area is the speculum around loophole.

6. light-emitting device according to claim 5, it is characterised in that the firstth area of the smooth guiding piece is loophole, and the secondth area is the speculum around loophole, and the speculum is reflecting curved surface；The smooth guiding piece is also the light-operated product.

7. light-emitting device according to claim 1, it is characterised in that for the first lens are compared to planoconvex spotlight, bottom surface is plane or concave surface, there is projection upper surface, the projection and the firstth area that the first lens are partly constituted below projection.

8. light-emitting device according to claim 1, it is characterized in that, the light-emitting device also includes second laser and corresponding collimating element, the exciting light of first laser device outgoing is distinguished after collimated element collimation with the laser of second laser outgoing, is combined into beam of laser and is incident to the firstth area of the first lens；The Wavelength converter is additionally operable to scatter the laser from second laser.

9. a kind of optical projection system, it is characterised in that including the light-emitting device as any one of claim 1 to 8.

10. a kind of illuminator, it is characterised in that including the light-emitting device as any one of claim 1 to 8.