CN104460008A - Light emitting device - Google Patents
Light emitting device Download PDFInfo
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- CN104460008A CN104460008A CN201410712784.0A CN201410712784A CN104460008A CN 104460008 A CN104460008 A CN 104460008A CN 201410712784 A CN201410712784 A CN 201410712784A CN 104460008 A CN104460008 A CN 104460008A
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- blue light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/106—Beam splitting or combining systems for splitting or combining a plurality of identical beams or images, e.g. image replication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/12—Combinations of only three kinds of elements
- F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
Abstract
A light emitting device comprises a light splitting device located on a blue light path, a reflection device located on a first light path and a wavelength conversion device located on a second light path. The light splitting face of the light splitting device comprises a transmission area and a reflection area, blue light coming into the transmission area forms first blue light through the light splitting device, and blue light coming into the reflection area is reflected by the light splitting device to form second blue light; the first blue light is reflected by the reflection device and returns to the light splitting device reversely, and part of the first blue light is reflected by the reflection area of the light splitting device to form first emergent light; the wavelength conversion device absorbs the second blue light and is excited to emit excited light, and the excited light returns to the light splitting device and forms second emergent light after transmitting the light splitting device. By means of the light emitting device, part of the blue light is reflected by the reflection device to form the first emergent light, another part of the blue light excites the excited light to form the second emergent light, and accordingly output of hybrid light of the two kinds of emergent light is achieved.
Description
Technical field
The present invention relates to light source field, particularly relate to a kind of light-emitting device.
Background technology
Current, light source technology is applied to numerous areas, and applying maximum light sources is Halogen lamp LED and fluorescent light.The maximum problem of these light sources is luminance shortage.In recent years, rapidly, utilize blue LED to excite the yellow fluorescent powder being coated on LED surface to produce white light, this light source has started commercially to popularize in LED light source development.But problem is that the power of single LEDs light source is lower, still there is the problem of luminance shortage.
And high-luminance light source domain, conventional is high-pressure sodium lamp and xenon source, and such light source relies on ultrashort lamp arc and has very high brightness (energy density), but problem is its life-span only has 1000 hours, and use cost is very high.
Occurred a kind of semiconductor light sources at present, its structure as shown in Figure 7.The exciting light 721 that excitation source (not shown in FIG.) sends through the transmission of light splitting optical filter 711 be incident in lens 703 and through lens 703 refraction and focus on phosphor powder layer 701.Rear collimation is collected by lens 703, the final outgoing through the reflection of light splitting optical filter 711 from the Stimulated Light 722 of phosphor powder layer 701 outgoing.In this light source, light splitting optical filter 811 transmission exciting light reflects Stimulated Light simultaneously, its role is to the light path of exciting light and Stimulated Light to be separated.If not this light splitting optical filter, then Stimulated Light all will cause serious light loss to the outgoing of excitation source direction.
But this structure can only outgoing Stimulated Light, and Stimulated Light monochromatic light and can not be white light often.Therefore current semiconductor light source structure does not realize the white light of high brightness.
Summary of the invention
The present invention proposes a kind of light-emitting device, comprises the blue light source for launching blue light; Comprise the light-dividing device be positioned in blue light paths, the light splitting surface of this light-dividing device comprises transmission area and echo area, and the blue light being incident in transmission area forms the first blue light through light-dividing device, and the transmitted light path at its place is the first light path; The blue light being incident in echo area is split device reflection and form the second blue light, and the reflected light path at its place is the second light path; Comprise the reflection unit be positioned in the first light path, the first blue light is reflected by this reflection unit and turns back to light-dividing device along the first light path is reverse, a part be wherein split device echo area reflection and form the first emergent light; Comprise the Wavelength converter be positioned in the second light path, this Wavelength converter absorbs the second blue light and stimulated emission Stimulated Light, this Stimulated Light turns back to light-dividing device and transmission light-dividing device and form the second emergent light along the second light path is reverse, and the first emergent light and the second emergent light are combined into a branch of outgoing; Also comprising regulating device, moving along first direction in the plane at light splitting surface place for regulating this light-dividing device; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
The present invention also proposes a kind of light-emitting device, comprises the blue light source for launching blue light; Comprise the light-dividing device be positioned in blue light paths, the light splitting surface of this light-dividing device comprises transmission area and echo area, and the blue light being incident in transmission area forms the first blue light through light-dividing device, and the transmitted light path at its place is the first light path; The blue light being incident in echo area is split device reflection and form the second blue light, and the reflected light path at its place is the second light path; Comprise the reflection unit be positioned in the second light path, the second blue light is reflected by this reflection unit and turns back to light-dividing device along the second light path is reverse, a part be wherein split device transmissive region and form the first emergent light; Comprise the Wavelength converter be positioned in the first light path, this Wavelength converter absorbs the first blue light and stimulated emission Stimulated Light, this Stimulated Light along the first light path reverse turn back to light-dividing device and be split device reflection and form the second emergent light, the first emergent light and the second emergent light are combined into a branch of outgoing; Also comprising regulating device, moving along first direction in the plane at light splitting surface place for regulating this light-dividing device; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
The present invention also proposes a kind of light-emitting device, comprises the blue light source for launching blue light; Comprise the light-dividing device be positioned in blue light paths, the light splitting surface of this light-dividing device comprises transmission area and echo area, and the blue light being incident in transmission area forms the first blue light through light-dividing device, and the transmitted light path at its place is the first light path; The blue light being incident in echo area is split device reflection and form the second blue light, and the reflected light path at its place is the second light path; Comprise the reflection unit be positioned in the second light path, the second blue light is reflected by this reflection unit and turns back to light-dividing device along the second light path is reverse, a part be wherein split device transmissive region and form the first emergent light; Comprise and be positioned at light spacer assembly in the first light path and Wavelength converter, Wavelength converter is arrived after first blue light transmitted light spacer assembly, Wavelength converter absorbs the first blue light and stimulated emission Stimulated Light, this Stimulated Light turns back to light spacer assembly along the first light path is reverse and is reflected by light spacer assembly and form the second emergent light, and the first emergent light and the second emergent light are combined into a branch of outgoing; Also comprising regulating device, moving along first direction in the plane at light splitting surface place for regulating this light-dividing device; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
Utilize light-emitting device of the present invention, a part of blue light can form the first emergent light after reflection unit reflection; Another part blue light can excite Stimulated Light and form the second emergent light, and the mixed light so just achieving two kinds of emergent lights exports.
Accompanying drawing explanation
Figure 1A illustrates the structural representation of first embodiment of the invention;
Figure 1B illustrates the front elevation of the light-dividing device in Figure 1A embodiment;
Fig. 1 C illustrates a kind of preferred embodiment of the reflection unit in Figure 1A embodiment;
Fig. 2 illustrates the preferred transmission spectrum of the transmission area in the light-dividing device in Figure 1A illustrated embodiment;
Fig. 3 A illustrates the structural representation of another embodiment of the present invention;
Fig. 3 B illustrates the schematic diagram of the Wavelength converter in Fig. 3 A embodiment;
Fig. 4 A illustrates the structural representation of another embodiment of the present invention;
Fig. 4 B illustrates the front elevation of the light-dividing device in Fig. 4 A embodiment;
Fig. 5 illustrates the preferred transmission spectrum of the echo area of the light-dividing device in Fig. 4 A embodiment;
Fig. 6 A illustrates the structural representation of another embodiment of the present invention;
Fig. 6 B illustrates the front elevation of the light-dividing device in Fig. 6 B embodiment;
Fig. 7 illustrates existing a kind of light-source structure schematic diagram.
Embodiment
The present invention proposes a kind of light-emitting device, and its structural representation as shown in Figure 1A.This light-emitting device comprises and representing for launching blue light 141(heavy line) blue light source 101, also comprise the light-dividing device 104 be positioned in blue light paths.As shown in Figure 1B, wherein, the light splitting surface of light-dividing device 104 comprises transmission area 104a and echo area 104b to the front elevation of this light-dividing device 104.The blue light being incident in transmission area 104a forms the first blue light 142(fine line through light-dividing device 104 and represents), the transmitted light path at its place is the first light path.The blue light being incident in echo area 104b be split device reflection and to form the second blue light 143(represented by dashed line), the reflected light path at its place is the second light path.
Light-emitting device also comprises the reflection unit 107 be positioned in the first light path, first blue light 142 is reflected by this reflection unit 107 and turns back to light-dividing device 104 along the first light path is reverse, a part be wherein split device 104 echo area 104b reflect and form the first emergent light 142.
Light-emitting device also comprises the Wavelength converter be positioned in the second light path, this Wavelength converter comprises wavelength conversion layer 106 and substrate 105, substrate 105 is used for carrying wavelength conversion layer, plays the effect for the Stimulated Light that wavelength conversion layer dispels the heat and reflective wavelength-converting layer sends simultaneously.The structure of Wavelength converter just citing herein, the structure that certain Wavelength converter also can not adopt the present embodiment such, such as, adopt fluorescent glass sheet, so just do not need the carrying of substrate.
Wavelength conversion layer 106 absorbs the second blue light 143 and stimulated emission Stimulated Light 144, this Stimulated Light 144 turns back to light-dividing device 104 transmission light-dividing device 104 along the second light path is reverse and forms the second emergent light 144, the first emergent light and the second emergent light is combined into a branch of outgoing.
The light-emitting device of the present embodiment also comprises regulating device 121, moves in the plane at light splitting surface place for regulating this light-dividing device along first direction.In the present embodiment, the intersection direction of the light splitting surface of first direction and paper plane and light-dividing device 104, the A direction namely in Figure 1A.Wherein, as shown in Figure 1B, the transmission area of the light splitting surface of light-dividing device 104 and the area ratio of echo area are change on A direction.
In the present embodiment, light-dividing device 104 is optical filters 104 of subregion plated film, and each plated film district is the rectangle that the width arranged in parallel along A direction does not wait.Wherein, transmission area 104a not plated film or be coated with anti-reflection film, echo area 104b is coated with the film of reflect green light transmission Stimulated Light.Subregion plated film is the technology of comparative maturity, and cost is also more cheap.
Like this, through transmission area 104a the first blue light 142 by 107 reflection after can along the first light path reverse get back to light-dividing device 104, the part wherein inciding echo area 104b will form the first emergent light; Simultaneously, the the second blue light 143 excitation wavelength conversion layer 106 reflected by echo area 104b also makes its stimulated emission Stimulated Light, this Stimulated Light 144 along the second light path reverse turn back to light-dividing device 104, no matter be incident in the Stimulated Light of transmission area 104a or echo area 104b, can transmission form the second emergent light 144.Like this, the first emergent light and the second emergent light just can be combined into a branch of mixed light and outgoing, so just achieve the output of mixed light.Such as, Wavelength converter comprises yellow wavelengths transition material, and therefore the second emergent light is exactly yellow Stimulated Light, and it can form white light after mixing with the first blue emergent light.Certainly, Wavelength converter also can comprise green wavelength transition material, red wavelength transition material, also may comprise the mixing of multi-wavelength's transition materials such as green, redness, yellow.
As shown in Figure 1B, light-dividing device 104 in A direction from left to right, can find out that the area ratio of transmission area and echo area is increasing, namely when the position that blue light 141 is incident in light-dividing device 104 is moved from left to right on A direction, the ratio shared by first blue light 142 of transmission light-dividing device is more and more higher, the ratio shared by second blue light 143 of the device that is split reflection is more and more lower, and then the ratio regular meeting in emergent light shared by the first emergent light increases.Comprise yellow wavelengths transition material for Wavelength converter, the ratio of the first wherein blue emergent light increases the colour temperature increase meaning the white light of outgoing.Therefore, regulate light-dividing device movement along first direction in the plane at light splitting surface place by regulating device 121, the proportionate relationship of the first emergent light and the second emergent light in emergent light can be regulated, thus change the color of the emergent light of this mixing.
Obviously, the ratio of the from left to right transmission area shown in Figure 1B increases just a kind of citing, can certainly be that from left to right echo area increases, or foveal reflex district ratio is minimum and increase to both sides, or foveal reflex district ratio is the highest and reduce to both sides, or other Changing Pattern.In a word, as long as the area ratio of the transmission area of the light splitting surface of light-dividing device and echo area is change in a first direction, the color of outgoing mixed light so just can be changed by the adjustment of regulating device.
In the present embodiment, preferably also comprise the collecting lens 108 being positioned at the second light path, it simultaneously for collecting the Stimulated Light that wavelength conversion layer 106 sends, thus improves light collection efficiency for the second blue light 143 is converged at wavelength conversion layer 106.
Preferably, Wavelength converter also comprises motor, and motor driving wavelength conversion layer rotates, and makes blue-light excited periodically by incidence of each point on wavelength conversion layer, the thermal load of each point on wavelength conversion layer can be effectively reduced like this, thus improve the efficiency of wavelength conversion layer.
A kind of situation of reality is, blue light source 101 is blue laser light source, can be used for launching blue laser 141.Now, preferably, reflection unit is scattered reflection device, and such first blue light 142 is also eliminated the coherence of laser while reflection unit reflection by its scattering, avoid the appearance of laser speckle in emergent light.The method for making of scattered reflection device has a lot.Such as use the coating of the white powders such as barium sulphate, or use the Inorganic white such as titanium dioxide, aluminium oxide powder mix with colloid and form coating, or use porous whiteware, or by white scattering coating and reflection or half reflection plane, do not repeat one by one herein.
General diffuse reflective layer is not enough to the coherence of laser all to remove sometimes, and so a kind of structure of preferred scattered reflection device as shown in Figure 1 C.Fig. 1 C is the structural representation of scattered reflection device 107, and its left side plan is scattering surface, and this surface exists fluctuating, and this contoured surface is coated with diffuse reflective layer.When after laser 152 incidence, part scattered reflection light can direct outgoing, and another part scattered reflection light (such as light 153) can be incident in outgoing again after scattering surface again, some scattered reflection light even repeatedly can be incident in outgoing again after scattering surface, the number of times that such reflected light is scattered just increases, thus better eliminates the coherence of laser.Obviously, the fluctuating of the scattering surface used in reality not necessarily as shown in Figure 1 C be taper, also may be the depression of some other shapes, the darker then light scattering imaging therein that caves in be more, and the effect of eliminating coherence is better.Laser may be incident in multiple depression, and that also may determine is incident in a depression, and this is not construed as limiting the invention.
When reflection unit is scattered reflection device, more preferred, light-dividing device 104 to reflection unit 107 light path and light-dividing device 104 to Wavelength converter light path arrange identical, what is called arranges and identically refers to that optical path length is identical or close, lens type is identical or close.Such benefit is, owing to being all the light dispersed close to lambert along two reverse light returned of light path, and two light paths arrange identical, and such first emergent light is just identical with Light distribation with the hot spot of the second emergent light, and the mixed light of formation will be very even.Therefore above-mentionedly identical definition is set refers to that its difference is not enough to the homogeneity of the mixed light causing the first emergent light and the second emergent light to be formed.
In the light-emitting device of the present embodiment, preferably also comprise heating radiator 122, blue light source 101 and Wavelength converter share this heating radiator 122.Whole like this luminous device structure is very compact, and user can only for some of this heating radiator, and not need to design heat radiation respectively for blue light source 101 and Wavelength converter constantly doing heat dissipation design, and this brings convenience for heat dissipation design.
Be appreciated that, preferred technical characteristic in the present embodiment, as reflection unit be scattered reflection device, light-dividing device shares technical characteristic this heating radiator to light path and the light-dividing device of reflection unit to arrange identical, blue light source and the Wavelength converter of the light path of Wavelength converter, can be applied in the following embodiment of the present invention equally, just no longer repeated description in embodiment below describes.
In the present embodiment, light-dividing device can be turned back to along the first light path is reverse after first blue light 142 is reflected by reflection unit, wherein the echo area of a part of device that is split is reflected and forms the first emergent light, and another part is then incident in the transmission area of light-dividing device and transmission forms loss.Preferably, this loss can be reduced by the coating designs of transmission area 104a.Fig. 2 illustrate the optimization plated film of this transmission area through spectrum, what indicate " blue light " in figure is blue spectrum, what indicate " Stimulated Light " is Stimulated Light spectrum, indicate " S polarized light " for S polarized light be incident in this optimization plated film through spectrum, indicate " P polarized light " for P polarized light be incident in this optimization plated film through spectrum.Visible, the transmission area of light-dividing device has the attribute of transmit blue P polarized light, reflect blue S polarized light transmission simultaneously Stimulated Light.If the blue light that blue light source sends is polarized light (such as laser), and this blue light is incident in light-dividing device with P polarized light, then this blue light still achievement unit light splitting can be incident in transmission area and transmission forms the object of the first blue light; This first blue light retrodeviates polarization state through reflection unit reflection and can change (especially when reflection unit is scattered reflection device, the polarization state of blue light can be eliminated substantially), such reflected light along the first light path reverse turn back to light-dividing device time, its light being incident in transmission area has part for S polarized light and being reflected, thus improves the overall efficiency that light-dividing device reflects the first blue light.
The structural representation of an alternative embodiment of the invention as shown in Figure 3A.With above-described embodiment unlike, in the present embodiment, also comprise the second regulating device 323, for regulating the position of light-dividing device 304 or Wavelength converter (comprising wavelength conversion layer 306), the relative position making to be incident in blue light hot spot on Wavelength converter and Wavelength converter can be moved along second direction; Wherein, Wavelength converter wavelength convert attribute is in a second direction change.
In the present embodiment, second direction is the direction represented by arrow B, i.e. the horizontal direction of Fig. 3 A.Wavelength conversion layer 306 wavelength convert attribute is in directionb change, and the concentration of such as material for transformation of wave length changes, or the proportioning of two kinds of material for transformation of wave length changes.For example, wavelength conversion layer 306 comprises yellow and red two kinds of material for transformation of wave length, and from left to right the ratio of yellow wavelengths transition material reduces gradually, as shown in Figure 3 B, wavelength conversion layer 306 from left to right comprises three section 306a, 306b and 306c successively, wherein the ratio of red wavelength transition material improves successively, and the ratio of yellow wavelengths transition material once reduces.The change of this wavelength convert attribute on certain wavelength conversion layer also can be continually varying.When the relative position that the second regulating device 323 regulates the position of light-dividing device 304 or Wavelength converter to make to be incident in blue light hot spot on Wavelength converter and Wavelength converter is moved along B direction, the yellow that Stimulated Light 344 comprises and red composition will change, thus cause the adjustment of the second emergent light color.The white light of various colour temperature can be obtained in conjunction with regulating device 321 and the second regulating device 323.
In the present embodiment, concrete, the second regulating device 323 regulates light-dividing device 304 and collecting lens 308 integrally to move along B direction.Such benefit is that Wavelength converter can remain unchanged, thus it is relative fixing to keep with heating radiator, thus still can share same heating radiator with blue light source.
An alternative embodiment of the invention as shown in Figure 4 A.With the embodiment shown in Figure 1A unlike, the position of reflection unit and Wavelength converter has been exchanged, and namely reflection unit is positioned in the second light path and receives the second blue light, and Wavelength converter is positioned in the first light path and receives the first blue light.Embodiment shown in the present embodiment and Figure 1A does not have essential distinction in essence, all that the blue light sent by blue light source is divided into two parts, a part by reflection unit reflection after recycling, another part converts Stimulated Light to through Wavelength converter, last two strands photosynthetic be a branch of formation mixed light.But in the present embodiment, due to the exchange of reflection unit and Wavelength converter position, cause the light-dividing device in light-dividing device and Figure 1A illustrated embodiment different.Be described in detail below.
In the light-emitting device of the present embodiment, comprise the reflection unit 407 be positioned in the second light path, second blue light 442 is reflected by this reflection unit 407 and turns back to light-dividing device 404 along the second light path is reverse, a part be wherein split device 404 transmissive region and form the first emergent light.Light-emitting device also comprises the Wavelength converter (comprising wavelength conversion layer 406) be positioned in the first light path, this Wavelength converter absorbs the first blue light 443 and stimulated emission Stimulated Light, this Stimulated Light turns back to light-dividing device 404 and the device reflection and form the second emergent light 444, the first emergent light and the second emergent light is combined into a branch of outgoing of being split along the first light path is reverse.Also comprising regulating device 421, moving along A direction in the plane at light splitting surface place for regulating this light-dividing device 404; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
The schematic diagram of the light-dividing device 404 in the present embodiment as shown in Figure 4 B.Light-dividing device 404 comprises transmission area 404a and echo area 404b.The difference of the light-dividing device shown in it and Figure 1B has 2 points.First, the shape of transmission area and echo area is no longer bar shaped, transmission area be connect rotund, echo area be then removing transmission area outside remaining region.Spacing by controlling each circular transmission area in the present embodiment changes the ratio of transmission area and echo area.Transmission area and the echo area of its effect obvious and bar shaped are as broad as long.In a word, in the present invention, the shape of transmission area and echo area is not limited to the such shape of Figure 1B and Fig. 4 B and distribution, also can be other shape and distribution.In actual applications, the degree of the easy processing of main consideration subregion plated film designs the shape of transmission area and echo area.The prior difference of light-dividing device shown in light-dividing device shown in Fig. 4 B and Figure 1B is, transmission area is different with the light-filtering characteristic of echo area.In the present embodiment, transmission area 404a transmit blue reflects Stimulated Light simultaneously, echo area then simultaneously reflect blue and green glow.Such light-dividing device has multiple implementation, such as, realize for twice at the same face subregion plated film, and echo area direct plating reflectance coating.Better implementation is, plates echo area, such as, plate reflectance coating at light-dividing device towards the mode of the one side employing subregion plated film of blue light source; At the filter coating of the side towards Wavelength converter of light-dividing device plating transmit blue reflection Stimulated Light, this filter coating does not need subregion to plate, whole of direct plating.
In order to improve the final utilization ratio of the blue light that reflected by reflection unit, the present embodiment can be realized by the plated film optimizing echo area.Fig. 5 illustrate the optimization plated film of this echo area through spectrum, what indicate " blue light " in figure is blue spectrum, what indicate " Stimulated Light " is Stimulated Light spectrum, indicate " S polarized light " for S polarized light be incident in this optimization plated film through spectrum, indicate " P polarized light " for P polarized light be incident in this optimization plated film through spectrum.Visible, the attribute that echo area has transmit blue P polarized light, reflect blue S polarized light reflects Stimulated Light simultaneously of light-dividing device.If the blue light that blue light source sends is polarized light (such as laser), and this blue light is incident in light-dividing device with S polarized light, then this blue light still achievement unit light splitting can be incident in echo area and is reflected to form the object of the second blue light by it; This second blue light retrodeviates polarization state through reflection unit reflection and can change (especially when reflection unit is scattered reflection device, the polarization state of blue light can be eliminated substantially), such reflected light along the second light path reverse turn back to light-dividing device time, its light being incident in echo area has part for P polarized light and being transmitted, thus improves the overall efficiency that light-dividing device reflects the second blue light.
In fact, if the plating transmit blue of whole reflects the filter coating of Stimulated Light in the side towards Wavelength converter of light-dividing device, then the echo area whether transmission Stimulated Light of the another side of light-dividing device is just inessential, because Stimulated Light has been split, the one side towards Wavelength converter of device reflects.Now, the echo area of the side towards blue light source of light-dividing device also can adopt filter coating as shown in Figure 2.
In the present embodiment, light-dividing device can adopt the mode of two sides plated film respectively to realize, and wherein one side is the effect that subregion plated film plays fractional transmission blue light components reflect blue, and another side is the plated film of whole.In fact only have the one side of subregion plated film to serve the effect of separately blue light, therefore the effect of this two sides plated film is independently, also can be realized respectively by two devices.In the embodiment shown in Fig. 6 A, echo area 604b on light-dividing device 604 is identical with the optical filtering attribute of the echo area 404b shown in Fig. 4 B, and with the light-dividing device shown in Fig. 4 B unlike, transmission area 604a not plated film or the plating anti-reflection film of light-dividing device 604, part in blue light 641 can be reflected by echo area 604b, and remainder can from transmission area through.Simultaneously, another difference of embodiment shown in the present embodiment and Fig. 4 A is, comprise the light spacer assembly 614 being positioned at Wavelength converter (comprising wavelength conversion layer 606) light path front end be positioned in the first light path, Wavelength converter is arrived after first blue light 643 transmitted light spacer assembly 614, Wavelength converter absorbs the first blue light and stimulated emission Stimulated Light 644, and this Stimulated Light turns back to light spacer assembly 614 along the first light path is reverse and is reflected by light spacer assembly 614 and form the second emergent light 644.Also the function forming mixed light outgoing can be realized like this by light-dividing device and the acting in conjunction of light spacer assembly.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a light-emitting device, is characterized in that:
Comprise the blue light source for launching blue light;
Comprise the light-dividing device be positioned in blue light paths, the light splitting surface of this light-dividing device comprises transmission area and echo area, and the blue light being incident in transmission area forms the first blue light through light-dividing device, and the transmitted light path at its place is the first light path; The blue light being incident in echo area is split device reflection and form the second blue light, and the reflected light path at its place is the second light path;
Comprise the reflection unit be positioned in the first light path, the first blue light is reflected by this reflection unit and turns back to light-dividing device along the first light path is reverse, a part be wherein split device echo area reflection and form the first emergent light;
Comprise the Wavelength converter be positioned in the second light path, this Wavelength converter absorbs the second blue light and stimulated emission Stimulated Light, this Stimulated Light turns back to light-dividing device and transmission light-dividing device and form the second emergent light along the second light path is reverse, and the first emergent light and the second emergent light are combined into a branch of outgoing;
Also comprising regulating device, moving along first direction in the plane at light splitting surface place for regulating this light-dividing device; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
2. light-emitting device according to claim 1, is characterized in that, the blue light that blue light source sends is polarized light, and this blue light is incident in light-dividing device with P polarized light; The transmission area of described light-dividing device has the attribute of transmitting blue P polarized light, reflection blue S polarized light transmission simultaneously Stimulated Light.
3. light-emitting device according to claim 1, is characterized in that, described blue light source and Wavelength converter share same heating radiator.
4. a light-emitting device, is characterized in that:
Comprise the blue light source for launching blue light;
Comprise the light-dividing device be positioned in blue light paths, the light splitting surface of this light-dividing device comprises transmission area and echo area, and the blue light being incident in transmission area forms the first blue light through light-dividing device, and the transmitted light path at its place is the first light path; The blue light being incident in echo area is split device reflection and form the second blue light, and the reflected light path at its place is the second light path;
Comprise the reflection unit be positioned in the second light path, the second blue light is reflected by this reflection unit and turns back to light-dividing device along the second light path is reverse, a part be wherein split device transmissive region and form the first emergent light;
Comprise the Wavelength converter be positioned in the first light path, this Wavelength converter absorbs the first blue light and stimulated emission Stimulated Light, this Stimulated Light along the first light path reverse turn back to light-dividing device and be split device reflection and form the second emergent light, the first emergent light and the second emergent light are combined into a branch of outgoing;
Also comprising regulating device, moving along first direction in the plane at light splitting surface place for regulating this light-dividing device; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
5. light-emitting device according to claim 4, is characterized in that, the blue light that blue light source sends is polarized light, and this blue light is incident in light-dividing device with S polarized light; The echo area of described light-dividing device has the attribute of reflection blue S polarized light transmitting blue P polarized light simultaneously.
6. a light-emitting device, is characterized in that:
Comprise the blue light source for launching blue light;
Comprise the light-dividing device be positioned in blue light paths, the light splitting surface of this light-dividing device comprises transmission area and echo area, and the blue light being incident in transmission area forms the first blue light through light-dividing device, and the transmitted light path at its place is the first light path; The blue light being incident in echo area is split device reflection and form the second blue light, and the reflected light path at its place is the second light path;
Comprise the reflection unit be positioned in the second light path, the second blue light is reflected by this reflection unit and turns back to light-dividing device along the second light path is reverse, a part be wherein split device transmissive region and form the first emergent light;
Comprise and be positioned at light spacer assembly in the first light path and Wavelength converter, Wavelength converter is arrived after first blue light transmitted light spacer assembly, Wavelength converter absorbs the first blue light and stimulated emission Stimulated Light, this Stimulated Light turns back to light spacer assembly along the first light path is reverse and is reflected by light spacer assembly and form the second emergent light, and the first emergent light and the second emergent light are combined into a branch of outgoing;
Also comprising regulating device, moving along first direction in the plane at light splitting surface place for regulating this light-dividing device; Wherein, the transmission area of the light splitting surface of light-dividing device and the area ratio of echo area are change in a first direction.
7. the light-emitting device according to any one in claim 1 to 6, is characterized in that, described reflection unit is scattered reflection device.
8. light-emitting device according to claim 7, is characterized in that, described light-dividing device to reflection unit light path and light-dividing device to Wavelength converter light path arrange identical.
9. light-emitting device according to claim 7, is characterized in that, described scattered reflection device comprises a scattered reflection face risen and fallen.
10. light-emitting device according to any one of claim 1 to 6, it is characterized in that, also comprise the second regulating device, for regulating the position of light-dividing device or Wavelength converter, the relative position making to be incident in blue light hot spot on Wavelength converter and Wavelength converter can be moved along second direction; Wherein, described Wavelength converter wavelength convert attribute is in a second direction change.
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| CN201410712784.0A CN104460008B (en) | 2014-11-29 | 2014-11-29 | Light-emitting device |
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| CN201410712784.0A CN104460008B (en) | 2014-11-29 | 2014-11-29 | Light-emitting device |
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| CN104460008A true CN104460008A (en) | 2015-03-25 |
| CN104460008B CN104460008B (en) | 2017-06-06 |
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