CN102854723B - Light-emitting device and projection apparatus - Google Patents
Light-emitting device and projection apparatus Download PDFInfo
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- CN102854723B CN102854723B CN201210004149.8A CN201210004149A CN102854723B CN 102854723 B CN102854723 B CN 102854723B CN 201210004149 A CN201210004149 A CN 201210004149A CN 102854723 B CN102854723 B CN 102854723B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3158—Modulator illumination systems for controlling the spectrum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B33/00—Colour photography, other than mere exposure or projection of a colour film
- G03B33/08—Sequential recording or projection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
- H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
Abstract
The invention provides a light-emitting device and a projection apparatus. The light-emitting device comprises an exciting light source, a wavelength conversion device, a driving device and a light filtering device, as well as a light collection device, wherein the exciting light source is used for emitting exciting light, the wavelength conversion device is used for receiving the exciting light and emitting excited light and at least comprises a red light section, the driving device is used for driving the wavelength conversion device to periodically move relative to the exciting light, the light filtering device moves synchronously to the wavelength conversion device, the light filtering device at least comprises a red light filtering section corresponding to the red light section, the red light filtering section filters the light emitted from the red light section into red light, the light collection device is used for collecting and converging light emitted from the wavelength conversion device and enabling the incident angle of the light, entering the light filtering device, to be larger than or equal to 25 degrees and smaller than or equal to 45 degrees. According to the light-emitting device and the projection apparatus, both luminous flux of the red light and image display quality are achieved by optimizing and controlling the range of incident angles of light entering the light filtering device.
Description
Technical field
The present invention relates to optical technical field, particularly relate to light-emitting device and projection arrangement.
Background technology
At present, Projection Display more and more causes the attention of people.At present, the projection display technique of main flow uses Digital Micromirror Device (Digital Micromirror Device, DMD) the monochromatic light sequence of a sequential is modulated as light valve, by carrying out the synchronous monochromatic light image obtaining sequential on screen with the sequential of this monochromatic light sequence, and each monochromatic light imaging importing is formed coloured image by the final persistence of vision effect of human eye that relies on together.
In this projection display technique, the formation of the monochromatic light sequence of sequential is a gordian technique.A method uses white light source focusing illumination on a filter disc, this filter disc is circumferentially distributed with the optical filter of multiple color, these optical filters along with the periodicity uniform rotation of this filter disc is successively by the focal beam spot of this white light source, and then form the periodic sequence of each color.
United States Patent (USP) 7547114 discloses another kind of feasible method, namely an excitation source is used to be irradiated to one by the fluorescent powder color wheel being distributed with multiple fluorescent powder section at circumferencial direction, along with these fluorescent powder of rotation of this colour wheel are excited successively and then realize the periodic sequence of each color.Current this scheme has become the focus of research.
But program Problems existing is, the efficiency of red fluorescence powder is too low, and serviceable life is too short, and then makes ruddiness become the efficiency of whole light-source system and the bottleneck in life-span.
Produce the problem of ruddiness to solve, someone proposes to use high-level efficiency and stable yellow or green emitting phosphor, by optical filter the green color components in its emission spectrum is filtered out and produces ruddiness.Yellow the most frequently used at present and the emission spectrum of green emitting phosphor as shown in Figure 1 in 101 shown in.The spectra part of general definition wherein more than 590nm is ruddiness, is expressed as SPECTRAL REGION 102 in FIG.Certain color due to light is continually varying with wavelength, and the boundary line of 590nm is herein only citing for convenience of description.
In actual applications, this optical filter is installed on a filter wheel, this filter wheel and fluorescent powder color wheel synchronous axial system, makes each optical filter on filter wheel corresponding with the fluorescent powder section of color a certain on fluorescent powder color wheel.
Have very good stability because yellow and green emitting phosphor are proved to be, this method can well solve the problem of the life-span bottleneck of ruddiness, but the introducing of optical filter creates new problem.
The transmittance curve of a typical optical filter as shown in Figure 2, wherein 201 is the transmittance curves when the incident angle of incident ray is 0 degree, the transmittance curve that 202,203,204,205 is the incident angle of incident ray respectively when being 20 degree, 40 degree, 60 degree, 80 degree; As can be seen here, the transmittance curve of optical filter is along with the increase of incident angle to the drift of short wavelength direction, and namely the light of this optical filter to different incidence angles exists different responses.
Consider that the sodium yellow that fluorescent powder color wheel sends or green light are when inciding on this optical filter, certainly exist an angular range, namely form a light cone, therefore this optical filter should be the comprehensive effect of the response of light to each different angles for the sodium yellow of incidence or the response of green light.Through experiment, the comprehensive transmittance curve of this optical filter to the incident ray of different angles scope can be obtained, as shown in Figure 3 a, wherein 302 is combined permeation curves of this optical filter of light cone being 20 degree for entrance half-angle, and 303,304,305 is the combined permeation curve of this optical filter of light cone being 40 degree, 60 degree, 80 degree respectively for entrance half-angle.Be appreciated that the incident light of same spectra is when the light cone forming different incidence angles this optical filter incident, the color of the emergent light after the filtration obtained and luminous flux are all different.
In order to obtain specific red light color coordinate, can make combined permeation curvilinear translation by design optical filter, the color of such as, emergent light after hope is filtered is more red, then combined permeation curve can be made to long wavelength's translation.
By experiment, inventor has found such rule: by under in such as Fig. 1, the yellow spectrum shown in 101 is filled into the prerequisite of identical red light color coordinate, and the angular range of incident light light cone is larger, then the ruddiness luminous flux after filtering is lower, as shown in Figure 3 b.In figure, horizontal ordinate is the half-angle angle of incident light light cone, and ordinate is the luminous flux that the ruddiness after filtering is relative; In this experiment, the chromaticity coordinates of the ruddiness after the filtration of each light cone is (0.64,0.33).
As can be seen here, export to realize maximum ruddiness luminous flux, the angle being incident in the light cone of optical filter is the smaller the better.But according to optical extend law of conservation, the angle of light cone diminishes, mean that the size of hot spot increases, and spot size increases the increase of the spoke light (spoke light) that further can cause on the filter wheel at above-mentioned optical filter place.When the seam of adjacent two optical filters turns on the hot spot that above-mentioned light cone formed, these two optical filters can be had an effect to this hot spot simultaneously and then form crosstalk, and the light after filtration is now called spoke light.The existence of spoke light can reduce contrast and the effect of image display.Can imagine, light cone half-angle angle is less, then the size of hot spot is larger, and then spoke light is larger, and image displaying quality is lower.
In sum, the display quality of current ruddiness luminous flux and image forms conflict.
Summary of the invention
The technical problem underlying that the present invention solves solves the contradiction between above-mentioned ruddiness luminous flux and the display quality of image.
The present invention proposes a kind of light-emitting device, comprise the excitation source for launching exciting light, with for receiving exciting light and launching the Wavelength converter of Stimulated Light, this Wavelength converter comprises at least two look sections, wherein at least comprise a red light color section, this red light color section comprises yellow or green wavelength transition material.Also comprise for driving Wavelength converter and exciting light periodic relative motion and making at least two look sections of this Wavelength converter be excited periodically successively light-struck drive unit.This light-emitting device also comprises the filtering apparatus be synchronized with the movement with Wavelength converter being arranged at Wavelength converter light path rear end, this filtering apparatus comprises at least two the optical filtering sections corresponding with at least two of Wavelength converter look sections, these at least two optical filtering sections at least comprise the ruddiness optical filtering section corresponding with red light color section, and the light that this red light color section sends is filtered into ruddiness by this ruddiness optical filtering section; Also comprise the light collecting device be arranged between Wavelength converter and the light path of filtering apparatus, this light collecting device makes its incident angle being incident in filtering apparatus be more than or equal to 25 degree and be less than or equal to 45 degree for collecting and assembling the light that this Wavelength converter sends.
The present invention also proposes a kind of projection arrangement, comprises above-mentioned light-emitting device.
In light-emitting device of the present invention and projection arrangement, utilize the ranges of incidence angles optimizing and control to be incident in filtering apparatus light, taken into account ruddiness luminous flux and image displaying quality, achieve the optimization of compromise and overall performance between the two.
Accompanying drawing explanation
Fig. 1 is the luminescent spectrum of existing yellow fluorescent powder;
Fig. 2 is the existing a kind of transmittance curve of optical filter for different incidence angles light filtering ruddiness;
What Fig. 3 a was the optical filter shown in Fig. 2 for the light cone of different incidence angles degree scope is corresponding;
Fig. 3 b is the relation curve between ruddiness luminous flux after filtering of spectrum under the prerequisite reaching identical red light color coordinate shown by Fig. 1 and the half-angle angle of incident light light cone;
Fig. 4 is the relation of spectrum ruddiness luminous flux and incident light spot size after filtering under the prerequisite reaching identical red light color coordinate shown by Fig. 1;
Fig. 5 a, 5b and 5c are the schematic diagram of first embodiment of the invention;
Fig. 6 is the schematic diagram of second embodiment of the invention;
Fig. 7 is the schematic diagram of third embodiment of the invention.
Embodiment
Inventor by experiment, obtains the relation between ruddiness luminous flux after filtering of yellow spectrum under the prerequisite reaching identical red light color coordinate shown by Fig. 1 and the spot size of incident light, as shown in Figure 4.Wherein, relative spot size when 401 half-angles referring to the input ray pencil be incident on optical filter are 10 degree and ruddiness relative brightness, relative spot size when 402 to 409 half-angles referring to the input ray pencil be incident on optical filter are respectively 20 degree, 25 degree, 30 degree, 40 degree, 45 degree, 50 degree, 60 degree, 70 degree and ruddiness relative brightness.As seen from the figure, when the half-angle of incident light light cone is between 10 degree and 25 degree, relative spot size is very large and the lifting of ruddiness relative brightness is not remarkable, and when incident light light cone half-angle is between 45 degree and 70 degree, ruddiness relative brightness is too low, when incident light light cone half-angle is more than or equal to 25 degree and is less than or equal to 45 degree, relative spot size and ruddiness relative brightness can be taken into account, the optimization of the compromise and overall performance of both realizations.Wherein, preferred incident light light cone half-angle is for being more than or equal to 25 degree and being less than or equal to 35 degree, this is because at this moment ruddiness relative brightness is comparatively large, and the incident angle of light of the DMD of this angular range comparison match rear end, be convenient to optical design.
As shown in Figure 5 a, wherein light-emitting device 500 comprises the excitation source (not shown in FIG.) for launching exciting light 501 to the structure of the first embodiment of the present invention, and for receiving exciting light 501 and launching the Wavelength converter 502 of Stimulated Light.Fig. 5 b is the front elevation of this Wavelength converter 502, and this Wavelength converter 502 comprises wavelength conversion layer 503.In the present embodiment, Wavelength converter 502 and wavelength conversion layer 503 are all processed to circle, and wavelength conversion layer 503 comprises two the look section 503a and 503b along the circumferential direction arranged.Wherein look section 503a is red light color section, this red light color section comprises yellow wavelengths transition material, and the stimulated luminescence spectrum of this yellow wavelengths transition material as shown in Figure 1; Look section 503b is green light color section.
In the present embodiment, Wavelength converter 502 also comprises substrate 511, and wavelength conversion layer 503 is attached on a surface of substrate 511, and this surface has light-reflecting property.The method forming wavelength conversion layer 503 on substrate 511 surface has multiple, such as, be coated on the surface of substrate 511 after being mixed with cementing agent by material for transformation of wave length, wavelength conversion layer is formed after solidification, after such as being mixed with liquid clear material such as glass or epoxy resin etc. by material for transformation of wave length again, moulding by casting forms sheet material, then this sheet material is fixed on substrate 511 surface formation wavelength conversion layer.
Light-emitting device 500 also comprises for driving Wavelength converter 502 with exciting light 501 periodic relative motion and make two of this Wavelength converter 502 look section 503a and 503b be excited periodically successively drive unit 504 that light 501 irradiates.In the present embodiment, drive unit 504 is motor, it drives Wavelength converter 502 around its center of circle uniform rotation, look section 503a and the 503b light 501 that is excited successively irradiates and produces Stimulated Light gold-tinted and green glow, this Stimulated Light is divided into two parts, directly outgoing is in the outside of Wavelength converter 502 for a part, and another part is reflected after being incident in substrate 511 surface, and final outgoing is in the outside of Wavelength converter 502.Also may comprising directly from the exciting light of Wavelength converter 502 surface reflection of outgoing simultaneously, this together constitutes the emergent light 510 of Wavelength converter 502.
Light-emitting device 500 also comprises the filtering apparatus 507 be synchronized with the movement with Wavelength converter 502 being arranged at Wavelength converter 502 light path rear end, and the front elevation of this filtering apparatus 507 as shown in Figure 5 c.This filtering apparatus 507 also has circular profile, and it comprises two the optical filtering section 507as and 507b corresponding with two of Wavelength converter 502 look sections, and wherein optical filtering section 507a is corresponding with look section 503a, and optical filtering section 507b is corresponding with look section 503b.Correspondence herein refers to: when the some look sections in Wavelength converter 502 move to the range of exposures of exciting light and launch Stimulated Light, and the rear end light path that the optical filtering section corresponding with it also moves to this look section is filtered the light that this look section sends.
In the present embodiment, optical filtering section 507a is the ruddiness optical filtering section corresponding with red light color section 503a.This ruddiness optical filtering section is interference filter, its transmit red light reflect green light, in transmission mode the light that this red light color section 503a sends is filtered into ruddiness.
Light-emitting device 500 also comprises the light collecting device between the light path being arranged at Wavelength converter 502 and filtering apparatus 507.This light collecting device makes its incident angle being incident in filtering apparatus 507 be more than or equal to 25 degree and be less than or equal to 45 degree for collecting and assembling the light that Wavelength converter 502 sends.In the present embodiment, light collecting device comprises curved reflector 506 and taper integrating rod 505.
Curved reflector 506 exists through hole 506a, and the inside surface of curved reflector 506 has reflector layer.Taper integrating rod 505 comprises light inlet 505a and light-emitting window 505b, and light is incident in this taper integrating rod 505 from light inlet 505a and goes out to shoot out from light-emitting window 505b after multiple reflections therein.According to optical extend conservation principle, light remains unchanged, as shown in formula (1) at the light inlet 505a of this taper integrating rod 505 and the optical extend of light-emitting window 505b:
S
enterΩ
enter=S
go outΩ
go out(1)
Wherein, S
enterand S
go outbe respectively the area of light inlet 505a and light-emitting window 505b, Ω
enterand Ω
go outbe respectively light cone and be incident in light inlet 505a and outgoing in the solid angle of light-emitting window 505b, and the solid angle of light cone generally to square being directly proportional of the sine of its half-angle.According to Fig. 4 and above-mentioned discussion, wish that outgoing is more than or equal to 25 degree in the half-angle of the light cone of light-emitting window 505b and is less than or equal to 45 degree in the present invention, and in the present embodiment, the light cone half-angle being incident in light inlet 505a is 90 degree, therefore can obtain the area ratio of light inlet 505a and light-emitting window 505b in the present embodiment:
Preferably, outgoing is more than or equal to 25 degree in the half-angle of the light cone of light-emitting window 505b and is less than or equal to 35 degree, therefore can obtain the area ratio of preferred light inlet 505a and light-emitting window 505b:
In the present embodiment, curved reflector 506 has hemispheric inside surface, and the position of the light inlet 505a of the position that Wavelength converter 502 is excited and taper integrating rod 505 is placed about this hemispheric centre of sphere symmetry.Exciting light 501 is incident in Wavelength converter 502 surface from the through hole 506a of this curved reflector 506, most of energy-incident in the emergent light 510 of simultaneously Wavelength converter 502 in the inside surface of this curved reflector 506 reflector layer and entered the light inlet 505a of taper integrating rod 505 by reflection, all the other fraction energy are revealed from through hole 506a and are formed loss.Because the size of general through hole 506a is less, this partition losses is negligible.
Be incident in filtering apparatus 507 from the light beam of the light-emitting window 505b outgoing of taper integrating rod 505, and finally obtain the emergent light 509 after filtering.Being more than or equal to 25 degree due to the light cone half-angle being incident in filtering apparatus 507 and being less than or equal to 45 degree, therefore having taken into account ruddiness brightness and spot size in emergent light 509, is that entire system performance reaches optimization.
In the present embodiment, utilize taper integrating rod 505 and optical extend conservation principle, the compression of light cone half-angle angle can be realized, and then meet the angle requirement being incident in the light cone of filtering apparatus 507.In fact, taper integrating rod is not perfect optical extend conservation device, and compound parabolic collector (CPC, Compound parabolic concentrator) can also be used to replace this taper integrating rod.This CPC has light inlet and light-emitting window equally, and according to its light inlet of optical extend conservation principle demand fulfillment formula (2) same with the area ratio of light-emitting window or (3).CPC is performance better optical extend conservation device, but its shortcoming is that processing cost is higher.This is prior art, does not repeat herein.
Taper integrating rod can also be replaced by lens, has discussion in this 3rd embodiment below.
In the present embodiment, red light color section 503a comprises yellow wavelengths transition material, the stimulated luminescence spectrum of this yellow wavelengths transition material as shown in Figure 1; In fact this red light color section 503a also can be green wavelength transition material, as long as there is red color light component in its Stimulated Light spectrum.
In the present embodiment, look section 503b is green light color section, comprises yellow or green wavelength transition material above.Certainly this look section also can be the look section of other color, and this is for the optimization not impact that the present invention is directed to red light color section.Red light color section 503a and green light color section 503b even can use identical material for transformation of wave length, such as all use yellow wavelengths transition material, when red light color section turns to the irradiation position of exciting light, the sodium yellow that the ruddiness optical filtering section filtration yellow wavelengths transition material corresponding with red light color section sends is red light; When green light color section turns to the irradiation position of exciting light, the sodium yellow that the green glow optical filtering section filtration yellow wavelengths transition material corresponding with green light color section sends is green light.
Be appreciated that the look section that the Wavelength converter in the present invention can also comprise more than two sections, filtering apparatus comprise more than the two sections corresponding sections of optical filtering simultaneously.A kind of conventional structure is, Wavelength converter comprises red light color section, green light color section, blue light color section three look sections, wherein red light color section comprises yellow or green wavelength transition material, green light color section comprises yellow or green wavelength transition material, and blue light color section then has different selections according to the difference of excitation wavelength.When exciting light is blue light, blue light color section may not comprise any material for transformation of wave length, and directly use exciting light to export as monochromatic light, corresponding blue light optical filtering section may be then the clear glass being coated with anti-reflection film; When exciting light is blue light, blue light color section also may comprise a small amount of blue green light material for transformation of wave length or green wavelength transition material or yellow wavelengths transition material, and the blue light of output is the Stimulated Light of these material for transformation of wave length and mixing of remaining exciting light; And when exciting light be purple light or ultraviolet light time, blue light color section then may comprise blue light wavelength transition material.Another kind of common structure is on the basis of above-mentioned three look sections, increasing gold-tinted or white color section, comprising yellow wavelengths transition material above, for strengthening white brightness.
In the present embodiment, the curved reflector 506 with hemispherical inner surface plays to be collected Wavelength converter luminescence and makes it be incident in the effect of the light inlet of light collecting device 505, in fact also can make otherwise to achieve this end.Such as use plane reflector, or there is the curved reflector of paraboloidal inside surface, or there is the reverberator of step-like surface, as long as can realize collecting Wavelength converter luminescence and the object being converged at the light inlet of taper integrating rod.This is prior art, does not repeat herein.
In the present invention, filtering apparatus and Wavelength converter are synchronized with the movement; In the present embodiment, another drive unit 508 moves for driving filtering apparatus 507, and drive unit 508 keeps synchronous with drive unit 504.A kind ofly keep synchronous mode to be easily be fixedly connected with drive unit 508 by drive unit 504, become an overall drive unit, drive filtering apparatus and Wavelength converter simultaneously.Certainly this does not limit use method of control circui to realize between two drive units 504 and 508 synchronous.
Mechanism in the second embodiment of the present invention as shown in Figure 6, with above-described embodiment unlike, filtering apparatus 607 comprises with the optical axis of incident light incident thereon is in the present embodiment the optical filtering face 6071 that miter angle is placed, and this optical filtering mask has the effect of the mode filter light reflected.This optical filtering face comprises at least two optical filtering sections, wherein at least comprise a ruddiness optical filtering section, this ruddiness optical filtering section reflect red transmit green, and then in the mode of reflection, the light that the red light color section on Wavelength converter sends is filtered into ruddiness.
As shown in Figure 7, it has different optical textures from above-mentioned two embodiments to the structure of the third embodiment of the present invention.Wherein, Wavelength converter 702 light 701 that is excited excites generation Stimulated Light, and this Stimulated Light is collected by light collecting device 705 and converged at filtering apparatus 707, and the filtration of electro-optical device 707 forms emergent light 709 after filtration.Wavelength converter 702 driven device 704 drives and exciting light 701 relative motion, and filtering apparatus 707 keeps synchronous with Wavelength converter 702 simultaneously.The structure of Wavelength converter 702 and filtering apparatus 707 is same as the previously described embodiments, no longer repeats herein.
In the present embodiment, preferably, Wavelength converter 702 also comprises one and is arranged at the light splitting optical filter (not shown in FIG.) that material for transformation of wave length receives the one side of exciting light, and this light splitting filter transmission exciting light reflects Stimulated Light simultaneously.
In the present embodiment, light collecting device 705 comprises lens or lens combination, simultaneously Wavelength converter and filtering apparatus lay respectively in the conjugate plane of these lens or lens combination light path both sides, which ensure that hot spot on Wavelength converter by forming the picture of this hot spot on filtering apparatus after light collecting device 705.By optical design, lens or lens combination 705 meet optical extend conservation principle equally, as shown in formula (4):
S
1Ω
1＝S
2Ω
2(4)
Wherein S
1and S
2be respectively the area with the hot spot on filtering apparatus 707 on Wavelength converter 702, Ω
1and Ω
2be respectively the solid angle of the light cone of the emergent light that Wavelength converter 702 is collected by light collecting device 705 and be incident in the light cone solid angle of filtering apparatus 707, wherein Ω
1corresponding half-angle is roughly between 60 degree to 80 degree.Visible, the picture that the hot spot scioptics on Wavelength converter or lens combination 705 can be made to become to amplify on filtering apparatus by design, i.e. S
1< S
2, now just can make Ω
2be less than Ω
1.Therefore, by adjusting the enlargement factor S of the imaging of lens or lens combination 705
2/ S
1, the half-angle of the light cone being incident in filtering apparatus just can be made to realize being more than or equal to 25 degree and being less than or equal to 45 degree.
The present invention also proposes a kind of projection arrangement, comprises above-mentioned light-emitting device.
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, comprising:
For launching the excitation source of exciting light;
For receiving exciting light and launching the Wavelength converter of Stimulated Light, this Wavelength converter comprises at least two look sections;
For driving described Wavelength converter and described exciting light periodic relative motion and making at least two look sections of this Wavelength converter periodically be excited light-struck drive unit by described successively;
A red light color section is at least comprised at least two look sections of described Wavelength converter;
Also comprise:
Light collecting device;
The filtering apparatus be synchronized with the movement with Wavelength converter being arranged at described Wavelength converter light path rear end;
It is characterized in that:
Described filtering apparatus comprises at least two the optical filtering sections corresponding with at least two look sections of described Wavelength converter, described red light color section comprises yellow or green wavelength transition material, these at least two optical filtering sections at least comprise the ruddiness optical filtering section corresponding with described red light color section, and the light that this red light color section sends is filtered into ruddiness by this ruddiness optical filtering section;
Described light collecting device is arranged between the light path of described Wavelength converter and described filtering apparatus, and this light collecting device makes its incident angle being incident in described filtering apparatus be more than or equal to 25 degree and be less than or equal to 45 degree for collecting and assembling the light that this Wavelength converter sends.
2. light-emitting device according to claim 1, is characterized in that, the ruddiness optical filtering section transmit red light of described filtering apparatus reflect green light, in transmission mode the light that this red light color section sends is filtered into ruddiness.
3. light-emitting device according to claim 1, is characterized in that, the ruddiness optical filtering section reflect red of described filtering apparatus transmit green, in the mode reflected, the light that this red light color section sends is filtered into ruddiness.
4. light-emitting device according to claim 1, it is characterized in that, described light collecting device comprises taper integrating rod or compound parabolic planar laser, this taper integrating rod or compound parabolic collector comprise light inlet and light-emitting window, and the area ratio of light inlet and light-emitting window is more than or equal to 0.179 and is less than or equal to 0.5.
5. light-emitting device according to claim 4, is characterized in that, described taper integrating rod or the light inlet of compound parabolic collector and the area ratio of light-emitting window are more than or equal to 0.179 and are less than or equal to 0.329.
6. light-emitting device according to claim 1, is characterized in that, described light collecting device comprises lens or lens combination, and described Wavelength converter and filtering apparatus lay respectively in the conjugate plane of these lens or lens combination light path both sides; The picture that these lens or lens combination become to amplify to the thing of Wavelength converter side.
7. light-emitting device according to claim 1, is characterized in that, the incident angle that the light that described Wavelength converter sends is incident in described filtering apparatus is more than or equal to 25 degree and is less than or equal to 35 degree.
8. light-emitting device according to claim 1, is characterized in that, at least comprise a green light color section at least two look sections of described Wavelength converter, this green light color section comprises yellow or green wavelength transition material.
9. the light-emitting device according to claim 1 or 8, it is characterized in that, described Wavelength converter at least comprises red light color section, green light color section, blue light color section three look sections, wherein red light color section comprises yellow or green wavelength transition material, green light color section comprises yellow or green wavelength transition material, and blue light color section comprises blue light wavelength transition material or blue green light material for transformation of wave length or green wavelength transition material or yellow wavelengths transition material or do not comprise any material for transformation of wave length.
10. a projection arrangement, is characterized in that, comprises the light-emitting device described in any one in claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210004149.8A CN102854723B (en) | 2012-01-07 | 2012-01-07 | Light-emitting device and projection apparatus |
| PCT/CN2012/080737 WO2013102358A1 (en) | 2012-01-07 | 2012-08-29 | Light-emitting device and projection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210004149.8A CN102854723B (en) | 2012-01-07 | 2012-01-07 | Light-emitting device and projection apparatus |
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| CN102854723B true CN102854723B (en) | 2015-02-04 |
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| CN201210004149.8A Active CN102854723B (en) | 2012-01-07 | 2012-01-07 | Light-emitting device and projection apparatus |
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| WO (1) | WO2013102358A1 (en) |
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| CN102854733B (en) * | 2012-08-06 | 2015-06-24 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device and relevant projection system |
| CN104460199A (en) * | 2014-12-16 | 2015-03-25 | 无锡视美乐激光显示科技有限公司 | Dual-mode display device and method for projector |
| CN204420882U (en) | 2015-02-09 | 2015-06-24 | 深圳市绎立锐光科技开发有限公司 | Heat radiating type repaiies look colour wheel |
| CN106933009A (en) * | 2015-12-30 | 2017-07-07 | 深圳市光峰光电技术有限公司 | Light supply apparatus and the optical projection system including the light supply apparatus |
| CN105629648B (en) * | 2016-03-18 | 2017-12-15 | 济南金永大传媒科技有限公司 | A kind of double-colored wheel system for laser projection |
| CN109917610B (en) | 2017-12-12 | 2020-12-01 | 中强光电股份有限公司 | Light source module and projection device |
| CN109991803B (en) * | 2018-01-03 | 2022-02-22 | 深圳光峰科技股份有限公司 | Color wheel assembly, light source device and projection system |
| CN109991801B (en) * | 2018-01-03 | 2022-08-05 | 深圳光峰科技股份有限公司 | Color wheel assembly, light source device and projection system |
| CN110083000B (en) * | 2018-01-26 | 2021-10-15 | 中强光电股份有限公司 | Illumination system and projection device |
| WO2020024610A1 (en) * | 2018-08-01 | 2020-02-06 | 深圳市绎立锐光科技开发有限公司 | Light source system and light-emitting apparatus |
| CN110865503A (en) * | 2018-08-28 | 2020-03-06 | 青岛海信激光显示股份有限公司 | Fluorescent wheel, laser light source device and laser projection system |
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| TWI266141B (en) * | 2005-01-18 | 2006-11-11 | Young Optics Inc | Projector |
| WO2006133214A2 (en) * | 2005-06-07 | 2006-12-14 | Optical Research Associates | Phosphor wheel illuminator |
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| CN101799583A (en) * | 2009-02-09 | 2010-08-11 | 绎立锐光科技开发(深圳)有限公司 | Light wavelength conversion based method for improving emergent light color |
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| WO2013102358A1 (en) | 2013-07-11 |
| CN102854723A (en) | 2013-01-02 |
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