CN102854723A - Light-emitting device and projection apparatus - Google Patents

Light-emitting device and projection apparatus Download PDF

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Publication number
CN102854723A
CN102854723A CN2012100041498A CN201210004149A CN102854723A CN 102854723 A CN102854723 A CN 102854723A CN 2012100041498 A CN2012100041498 A CN 2012100041498A CN 201210004149 A CN201210004149 A CN 201210004149A CN 102854723 A CN102854723 A CN 102854723A
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light
wavelength converter
section
green
color section
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CN2012100041498A
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CN102854723B (en
Inventor
杨毅
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Shenzhen Appotronics Corp Ltd
Shenzhen Appotronics Technology Co Ltd
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Appotronics Corp Ltd
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Priority to CN201210004149.8A priority Critical patent/CN102854723B/en
Priority to PCT/CN2012/080737 priority patent/WO2013102358A1/en
Publication of CN102854723A publication Critical patent/CN102854723A/en
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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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Filters (AREA)
  • Projection Apparatus (AREA)

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

Light-emitting device and projection arrangement
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 people's attention.At present, the projection display technique of main flow is to use Digital Micromirror Device (Digital Micromirror Device, DMD) modulate the monochromatic light sequence of a sequential as light valve, by carrying out obtaining the monochromatic light image of sequential at screen synchronously with the sequential of this monochromatic light sequence, and the persistence of vision effect that finally relies on human eye is with each monochromatic light image formation coloured image that is superimposed.
In this projection display technique, the formation of the monochromatic light sequence of sequential is a gordian technique.A method is to use white light source to focus on to be radiated on the filter disc, this filter disc is distributed with the optical filter of a plurality of colors along circumferencial direction, these optical filters are the focal beam spot by this white light source successively along with the periodicity uniform rotation of this filter disc, and then forms the periodic sequence of each color.
United States Patent (USP) 7547114 discloses another kind of feasible method, namely use an excitation source to shine one by the fluorescent powder color wheel that is distributed with a plurality of fluorescent powder sections 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.Present this scheme has become the focus of research.
Yet the problem that this scheme exists is that the efficient of red fluorescence powder is too low, and serviceable life is too short, and then so that ruddiness becomes the efficient of whole light-source system and the bottleneck in life-span.
In order to solve the problem that produces ruddiness, the someone proposes to use high-level efficiency and stable yellow or green emitting phosphor, by optical filter the green glow composition in its emission spectrum is filtered out to produce ruddiness.At present shown in 101 in as shown in Figure 1 of the emission spectrum of the most frequently used yellow and green emitting phosphor.The General Definition wherein above spectra part of 590nm is ruddiness, is expressed as SPECTRAL REGION 102 in Fig. 1.Certainly because the color of light is continually varying with wavelength, the boundary line of 590nm herein only be for convenience of description for example.
In actual applications, this optical filter is installed on the filter wheel, and this filter wheel and fluorescent powder color wheel rotate synchronously so that on the filter wheel on each optical filter and the fluorescent powder color wheel fluorescent powder section of a certain color corresponding.
Have very good stability because yellow and green emitting phosphor is proved to be, this method can well solve the problem of the life-span bottleneck of ruddiness, yet the introducing of optical filter has produced new problem.
The transmittance curve of a typical optical filter as shown in Figure 2, wherein 201 is that incident angle when incident ray is 0 transmittance curve when spending, and 202,203,204,205 is respectively that the incident angle of incident ray is 20 degree, 40 degree, the transmittance curve when 60 degree, 80 are spent; This shows that to the drift of short wavelength's direction, namely there is different responses in this optical filter to the light of different incidence angles to the transmittance curve of optical filter along with the increase of incident angle.
When considering that sodium yellow that fluorescent powder color wheel sends or green light are on inciding this optical filter, certainly exist an angular range, namely form a light cone, so this optical filter should be comprehensive effect to the response of the light of each different angles for the response of the sodium yellow of incident or green light.Through experiment, can obtain this optical filter to the comprehensive transmittance curve of the incident ray of different angles scope, shown in Fig. 3 a, wherein 302 is to be the comprehensive transmittance curve of this optical filter of light cone of 20 degree for entrance half-angle, and 303,304,305 is respectively to be the comprehensive transmittance curve of this optical filter of light cone of 40 degree, 60 degree, 80 degree for entrance half-angle.Be appreciated that the incident light of same spectra when forming this optical filter of light cone incident of different incidence angles, the color of the emergent light after the filtration that obtains all is different with luminous flux.
In order to obtain specific red light color coordinate, can make comprehensive transmittance curve translation by the design optical filter, for example the color of the emergent light after wishing filtration is more red, then can make comprehensive transmittance curve to long wavelength's translation.
By experiment, the inventor has found such rule: the yellow spectrum shown among Fig. 1 101 is being filled under the prerequisite of identical red light color coordinate, and the angular range of incident light light cone is larger, and the ruddiness luminous flux after then filtering is lower, shown in Fig. 3 b.Among the figure, horizontal ordinate is the half-angle angle of incident light light cone, and ordinate is the relative luminous flux of ruddiness after filtering; In this experiment, the chromaticity coordinates of the ruddiness after each light cone filters is (0.64,0.33).
This shows that in order to realize maximum ruddiness luminous flux output, the angle of light cone that is incident in optical filter is the smaller the better.Yet, according to the optical extend law of conservation, the size increase that the angle of light cone diminishes and means hot spot, and spot size increases the increase of the spoke light (spoke light) on the filter wheel that further can cause above-mentioned optical filter place.When the seam of adjacent two optical filters turned on the formed hot spot of above-mentioned light cone, these two optical filters can be had an effect and then form this hot spot simultaneously and be crosstalked, and the light after the filtration of this moment is called spoke light.The existence of spoke light can reduce contrast and the effect that image shows.Can imagine that 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 ruddiness luminous flux and image forms conflict at present.
Summary of the invention
The technical problem underlying that the present invention solves is the contradiction that solves between the display quality of above-mentioned ruddiness luminous flux and image.
The present invention proposes a kind of light-emitting device, comprise the excitation source for the emission exciting light, receive exciting light and launch the Wavelength converter of Stimulated Light with being used for, this Wavelength converter comprises at least two look sections, wherein comprise at least 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 light-struck drive unit that is excited periodically successively.This light-emitting device also comprises the filtering apparatus that is synchronized with the movement with Wavelength converter that is arranged at Wavelength converter light path rear end, this filtering apparatus comprises at least two the filter sections corresponding with at least two look sections of Wavelength converter, these at least two sections that filter comprise the ruddiness optical filtering section corresponding with red light color section at least, and the light that this ruddiness optical filtering section is sent this red light color section is filtered into ruddiness; Also comprise the light collecting device between the light path that is arranged at Wavelength converter and filtering apparatus, the light that this Wavelength converter sends be used for to be collected and assembled to this light collecting device makes its incident angle that is incident in filtering apparatus more than or equal to 25 degree and less than or equal to 45 degree.
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 optimization and control to be incident in the ranges of incidence angles of filtering apparatus light, taken into account ruddiness luminous flux and image displaying quality, realized the optimization of compromise and overall performance between the two.
Description of drawings
Fig. 1 is the luminescent spectrum of existing yellow fluorescent powder;
Fig. 2 is that existing a kind of optical filter of ruddiness that filters is for the transmittance curve of different incidence angles light;
What Fig. 3 a was optical filter shown in Figure 2 for the light cone of different incidence angles degree scope is corresponding;
Fig. 3 b is reaching the shown spectrum of Fig. 1 under the prerequisite of identical red light color coordinate through the relation curve between the half-angle angle of the ruddiness luminous flux after filtering and incident light light cone;
Fig. 4 is reaching the relation of the shown spectrum of Fig. 1 under the prerequisite of identical red light color coordinate through ruddiness luminous flux after filtering and incident light spot size;
Fig. 5 a, 5b and 5c are the synoptic diagram of first embodiment of the invention;
Fig. 6 is the synoptic diagram of second embodiment of the invention;
Fig. 7 is the synoptic diagram of third embodiment of the invention.
Embodiment
The inventor has obtained reaching the shown yellow spectrum of Fig. 1 under the prerequisite of identical red light color coordinate through the relation between the spot size of the ruddiness luminous flux after filtering and incident light, as shown in Figure 4 by experiment.Wherein, 401 to refer to the half-angle that is incident in the input ray pencil on the optical filter be 10 relative spot size and ruddiness relative brightnesses when spending, and 402 to 409 to refer to respectively the half-angle that is incident in the input ray pencil on the optical filter be 20 degree, 25 degree, 30 degree, 40 degree, 45 degree, 50 degree, relative spot size and ruddiness relative brightness when 60 degree, 70 are spent.As seen from the figure, when the half-angle of incident light light cone is between 10 degree and 25 degree, relatively spot size is very large and the lifting ruddiness relative brightness is not remarkable, and when incident light light cone half-angle is between 45 degree and 70 degree, the ruddiness relative brightness is excessively low, when incident light light cone half-angle is spent more than or equal to 25 degree and less than or equal to 45, can take into account relative spot size and ruddiness relative brightness, realize the optimization of both compromise and overall performances.Wherein, preferred incident light light cone half-angle is that this is because at this moment ruddiness relative brightness is larger, and the incident angle of light of the DMD of this angular range comparison match rear end, is convenient to optical design more than or equal to 25 degree and less than or equal to 35 degree.
The structure of the first embodiment of the present invention is shown in Fig. 5 a, and wherein light-emitting device 500 comprises the excitation source (not shown in FIG.) for emission exciting light 501, and is used 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, comprises wavelength conversion layer 503 on this Wavelength converter 502.In the present embodiment, Wavelength converter 502 and wavelength conversion layer 503 all are processed to circle, and wavelength conversion layer 503 comprises along the circumferential direction two look section 503a and the 503b that arranges.Wherein look section 503a is red light color section, comprises the yellow wavelengths transition material on this red light color section, 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 the surface of substrate 511, and this surface has reflective characteristic.The method that forms wavelength conversion layer 503 on substrate 511 surfaces has multiple, for example with material for transformation of wave length and the surface that is coated on substrate 511 after cementing agent mixes, form wavelength conversion layer after solidifying, form sheet material such as moulding by casting after material for transformation of wave length is mixed with liquid clear material such as glass or epoxy resin etc. again, again this sheet material is fixed in substrate 511 surfaces and forms wavelength conversion layer.
Light-emitting device 500 also comprises for driving Wavelength converter 502 and exciting light 501 periodic relative motions and making two look section 503a of this Wavelength converter 502 and be excited the periodically successively drive unit 504 of light 501 irradiations of 503b.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 503b light 501 irradiation that is excited successively produces Stimulated Light gold-tinted and green glows, 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 surfaces, and final outgoing is in the outside of Wavelength converter 502.Simultaneously outgoing may comprise also that directly from the exciting light of Wavelength converter 502 surface reflections, this has consisted of the emergent light 510 of Wavelength converter 502 jointly.
Light-emitting device 500 also comprises the filtering apparatus 507 that is synchronized with the movement with Wavelength converter 502 that is arranged at Wavelength converter 502 light path rear ends, and the front elevation of this filtering apparatus 507 is shown in Fig. 5 c.This filtering apparatus 507 also has circular profile, and it comprises two filter section 507a and the 507bs corresponding with two look sections of Wavelength converter 502, and 507a is corresponding with look section 503a for the section that wherein filters, and 507b is corresponding with look section 503b for the section that filters.Correspondence herein refers to: when the some look sections in the Wavelength converter 502 moved to the range of exposures of exciting light and launch Stimulated Light, the optical filtering section corresponding with it also moved on the rear end light path of this look section and the light that this look section is sent filters.
In the present embodiment, optical filtering section 507a is the ruddiness optical filtering section corresponding with red light color section 503a.This ruddiness section that filters is interference filter, and its transmit red light and reflect green light are filtered into ruddiness in the mode of transmission with the light that this red light color section 503a sends.
Light-emitting device 500 also comprises the light collecting device between the light path that is arranged at Wavelength converter 502 and filtering apparatus 507.This light collecting device makes its incident angle that is incident in filtering apparatus 507 more than or equal to 25 degree and less than or equal to 45 degree for the light of collecting and convergence Wavelength converter 502 sends.In the present embodiment, light collecting device comprises curved reflector 506 and taper integrating rod 505.
There is through hole 506a on the curved reflector 506, and on the inside surface of curved reflector 506 reflector layer arranged.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 also goes out to shoot out from light-emitting window 505b behind section's Multi reflection within it.According to the optical extend conservation principle, light remains unchanged at the light inlet 505a of this taper integrating rod 505 and the optical extend of light-emitting window 505b, shown in formula (1):
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 with square being directly proportional of the sine of its half-angle.According to Fig. 4 and above-mentioned discussion, wish that in the present invention outgoing is in the half-angle of the light cone of light-emitting window 505b more than or equal to 25 degree and less than or equal to 45 degree, and in the present embodiment, therefore the light cone half-angle that is incident in light inlet 505a is 90 degree, can obtain the in the present embodiment Area Ratio of light inlet 505a and light-emitting window 505b:
Figure BDA0000129323140000051
Preferably, therefore outgoing can obtain the Area Ratio of preferred light inlet 505a and light-emitting window 505b in the half-angle of the light cone of light-emitting window 505b more than or equal to 25 degree and less than or equal to 35 degree:
Figure BDA0000129323140000052
In the present embodiment, curved reflector 506 has hemispheric inside surface, and place about this hemispheric centre of sphere is symmetrical the position of the light inlet 505a of the position that Wavelength converter 502 is excited and taper integrating rod 505.Exciting light 501 is incident in Wavelength converter 502 surfaces from the through hole 506a of this curved reflector 506, simultaneously the most of energy in the emergent light 510 of Wavelength converter 502 be incident in this curved reflector 506 inside surface reflector layer and be reflected the light inlet 505a that enters taper integrating rod 505, 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 part loss can be ignored.
Be incident on the filtering apparatus 507 from the light beam of the light-emitting window 505b outgoing of taper integrating rod 505, and the emergent light 509 after finally obtaining filtering.Owing to be incident in the light cone half-angle of filtering apparatus 507 more than or equal to 25 degree and less than or equal to 45 degree, therefore taken into account ruddiness brightness and spot size in the emergent light 509, be that the entire system performance reaches optimization.
In the present embodiment, utilize taper integrating rod 505 and optical extend conservation principle, can realize the compression of light cone half-angle angle, and then satisfy the angle requirement of the light cone that is incident in filtering apparatus 507.In fact, the taper integrating rod is not perfect optical extend conservation device, can also use composite parabolic optical collector (CPC, Compound parabolic concentrator) to replace this taper integrating rod.This CPC has light inlet and light-emitting window equally, and satisfies formula (2) or (3) according to the same needs of Area Ratio of its light inlet of optical extend conservation principle and light-emitting window.CPC is the better optical extend conservation of performance device, but its shortcoming is that processing cost is higher.This is prior art, does not give unnecessary details herein.
The taper integrating rod can also be replaced by lens, has discussion among this 3rd embodiment below.
In the present embodiment, comprise the yellow wavelengths transition material on the red light color section 503a, the stimulated luminescence spectrum of this yellow wavelengths transition material as shown in Figure 1; In fact also can be the green wavelength transition material on this red light color section 503a, as long as have the ruddiness composition in its Stimulated Light spectrum.
In the present embodiment, look section 503b is green light color section, and the above comprises yellow or green wavelength transition material.Certainly this look section also can be the look section of other color, and this is for not impact of the optimization that the present invention is directed to red light color section.Red light color section 503a is with green light color section 503b even can use identical material for transformation of wave length, for example all use the yellow wavelengths transition material, when red light color section turned 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 was red light; When green light color section turned 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 was green light.
Be appreciated that the look section that can also comprise on the Wavelength converter among the present invention more than two sections, comprise simultaneously the corresponding section that filters more than two sections on the filtering apparatus.A kind of structure commonly used is, Wavelength converter comprises red light color section, green light color section, three look sections of blue light color section, 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 was blue light, blue light color section may not comprise any material for transformation of wave length, directly used exciting light to export as monochromatic light, and corresponding blue light optical filtering section then may be the clear glass that is coated with anti-reflection film; When exciting light was 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 was purple light or ultraviolet light, blue light color section then may comprise the blue light wavelength transition material.Another kind of common structure is on the basis of above-mentioned three look sections, increases gold-tinted or white color section, and the above comprises the yellow wavelengths transition material, is used for strengthening white brightness.
In the present embodiment, the curved reflector 506 with semisphere inside surface plays that to collect Wavelength converter luminous and make its effect that is incident in the light inlet of light collecting device 505, in fact also can make otherwise to achieve this end.For example use plane reflector, or have the curved reflector of paraboloidal inside surface, or have the reverberator of step-like surface, as long as it is luminous and it is converged at the purpose of the light inlet of taper integrating rod to realize collecting Wavelength converter.This is prior art, does not give unnecessary details herein.
In the present invention, filtering apparatus and Wavelength converter are synchronized with the movement; In the present embodiment, another drive unit 508 is used for driving filtering apparatus 507 motions, and drive unit 508 keeps synchronously with drive unit 504.A kind ofly keep synchronous easily mode to be, drive unit 504 is fixedly connected with drive unit 508, become the drive unit of an integral body, drive simultaneously filtering apparatus and Wavelength converter.Certainly this do not limit method of using circuit control realize between two drive units 504 and 508 synchronously.
Mechanism in the second embodiment of the present invention as shown in Figure 6, different from above-described embodiment is, filtering apparatus 607 comprises the optical filtering face 6071 that is the miter angle placement with the optical axis of incident light incident thereon, the effect of the mode filter light that this optical filtering mask has to reflect in the present embodiment.Comprise at least two sections that filter on this optical filtering face, wherein comprise at least a ruddiness optical filtering section, this ruddiness optical filtering section reflect red and transmit green, and then the light that the red light color section on the Wavelength converter is sent in the mode of reflection is filtered into ruddiness.
The structure of the third embodiment of the present invention as shown in Figure 7, it has different optical textures from above-mentioned two embodiment.Wherein, Wavelength converter 702 light 701 that is excited excites the generation Stimulated Light, and filtering apparatus 707 is collected and converged to this Stimulated Light by light collecting device 705, and the filtration of electro-optical device 707 forms emergent light 709 after filtration.Wavelength converter 702 driven devices 704 drive and exciting light 701 relative motions, and filtering apparatus 707 keeps synchronously 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, preferred, Wavelength converter 702 comprises that also one 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 optical filter transmission exciting light reflects Stimulated Light simultaneously.
In the present embodiment, light collecting device 705 comprises lens or lens combination, Wavelength converter and filtering apparatus lay respectively on the conjugate plane of these lens or lens combination light path both sides simultaneously, and this has guaranteed that the hot spot on the Wavelength converter is by the light collecting device 705 rear pictures that form this hot spot at filtering apparatus.By optical design, lens or lens combination 705 satisfy the optical extend conservation principle equally, shown in formula (4):
S 1Ω 1＝S 2Ω 2(4)
S wherein 1And S 2Be respectively on the Wavelength converter 702 and filtering apparatus 707 on the area of hot spot, Ω 1And Ω 2Be respectively the solid angle and the light cone solid angle that is incident in filtering apparatus 707, wherein Ω of the light cone of the emergent light of being collected by light collecting device 705 on the Wavelength converter 702 1Corresponding half-angle is roughly 60 degree between 80 degree.As seen, the picture that can make hot spot scioptics on the Wavelength converter or lens combination 705 become to amplify at filtering apparatus by design, i.e. S 1＜S 2, just can make Ω this moment 2Less than Ω 1Therefore, the enlargement factor S of the imaging by adjusting lens or lens combination 705 2/ S 1, the half-angle of the light cone that is incident in filtering apparatus is realized more than or equal to 25 degree and less than or equal to 45 degree.
The present invention also proposes a kind of projection arrangement, comprises above-mentioned light-emitting device.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.

Claims (10)

1. a light-emitting device is characterized in that, comprising:
The excitation source that is used for the emission exciting light;
Be used for receiving exciting light and launching the Wavelength converter of Stimulated Light, this Wavelength converter comprises at least two look sections;
At least two look sections that are used for driving described Wavelength converter and described exciting light periodic relative motion and make this Wavelength converter are excited light-struck drive unit by described periodically successively;
At least comprise a red light color section at least two look sections of described Wavelength converter, this red light color section comprises yellow or green wavelength transition material;
Also comprise:
The filtering apparatus that is synchronized with the movement with Wavelength converter that is arranged at described Wavelength converter light path rear end, this filtering apparatus comprises at least two the filter sections corresponding with at least two look sections of described Wavelength converter, these at least two sections that filter comprise the ruddiness optical filtering section corresponding with described red light color section at least, and the light that this ruddiness optical filtering section is sent this red light color section is filtered into ruddiness;
Be arranged at the light collecting device between the light path of described Wavelength converter and described filtering apparatus, this light collecting device is used for collecting and assemble the light that this Wavelength converter sends makes its incident angle that is incident in described filtering apparatus more than or equal to 25 degree and less than or equal to 45 degree.
2. light-emitting device according to claim 1 is characterized in that, ruddiness optical filtering section transmit red light and the reflect green light of described filtering apparatus, and the light that this red light color section is sent in the mode of transmission is filtered into ruddiness.
3. light-emitting device according to claim 1 is characterized in that, ruddiness optical filtering section reflect red and the transmit green of described filtering apparatus, and the light that this red light color section is sent in the mode of reflection 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 composite parabolic optical 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 less than or equal to 0.5.
5. light-emitting device according to claim 4 is characterized in that, the light inlet of described taper integrating rod or composite parabolic optical collector and the Area Ratio of light-emitting window are more than or equal to 0.179 and 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 on the conjugate plane of these lens or lens combination light path both sides; These lens or lens combination become the picture of amplification to the thing of Wavelength converter one side.
7. light-emitting device according to claim 1 is characterized in that, the light that described Wavelength converter sends is incident in the incident angle of described filtering apparatus more than or equal to 25 degree and less than or equal to 35 degree.
8. light-emitting device according to claim 1 is characterized in that, comprises at least a green light color section at least two look sections of described Wavelength converter, and this green light color section comprises yellow or green wavelength transition material.
9. according to claim 1 or 8 described light-emitting devices, it is characterized in that, described Wavelength converter comprises red light color section, green light color section, three look sections of blue light color section at least, 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 described light-emitting device of any one in the claim 1 to 9.
CN201210004149.8A 2012-01-07 2012-01-07 Light-emitting device and projection apparatus Active CN102854723B (en)

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CN110083000A (en) * 2018-01-26 2019-08-02 中强光电股份有限公司 Lighting system and projection arrangement
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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
CN114830029A (en) * 2019-12-16 2022-07-29 巴科股份有限公司 High efficiency light engine system

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