CN107621746B

CN107621746B - Light emitting device and relevant projecting system

Info

Publication number: CN107621746B
Application number: CN201610562701.3A
Authority: CN
Inventors: 郭祖强; 陈红运; 李屹
Original assignee: Shenzhen Appotronics Technology Co Ltd
Current assignee: Shenzhen Appotronics Technology Co Ltd
Priority date: 2016-07-15
Filing date: 2016-07-15
Publication date: 2019-07-02
Anticipated expiration: 2036-07-15
Also published as: CN107621746A; WO2018010467A1

Abstract

The present invention relates to a kind of light emitting device and relevant projecting systems.The light emitting device includes first light source, Wavelength converter, second light source, light source control portion and regulating device.The Wavelength converter includes the first sectional area, the mixture of the carrying of the first sectional area first color fluorescence material and the second color fluorescence material.For emitting the first color of light, the first color of light that the first color of light of the second light source transmitting is used to generate with the Wavelength converter carries out light combination and constitutes the first color of light that the light emitting device issues the second light source.The light source control portion adjusts the driving current of the first light source and the driving current of the second light source, so that the actual color coordinate and intrinsic brilliance and the normal brightness of scheduled first color of light of the first color of light that the light emitting device issues are consistent with reference color coordinate.The light emitting device shines with relevant projecting system or display effect is preferable.

Description

Light emitting device and relevant projecting system

Technical field

The present invention relates to projection art, in particular to a kind of light emitting device and relevant projecting system.

Background technique

Existing optical projection system generally comprises light emitting device, light valve and control device, and the light emitting device is emitted RGB three Kind color light, the control device receive three kinds of color lights and according to input image data for controlling the light valve Modulation image.However, all there may be inclined for the light for each color that existing light emitting device issues or the image of light valve modulation The bad phenomenon of white balance caused by color or luminance shortage influences the projected picture effect of the optical projection system.

Summary of the invention

To solve the problems, such as that prior art light emitting device and optical projection system white balance are bad and influence display effect, it is necessary to It is proposed luminous one kind or the preferable light emitting device of display effect and optical projection system.

A kind of light emitting device comprising first light source, Wavelength converter, second light source, light source control portion and adjusting dress It sets.The Wavelength converter includes at least the first sectional area, and first sectional area carries the first color fluorescence material With the mixture of the second color fluorescence material, the first color fluorescence material is excited by the light of the first light source and generates the One color of light, the second color fluorescence material are excited by the light of the first light source and generate the second color of light, and described second Color of light can isolate the first color of light and another color of light.The second light source is for emitting the first color of light, and described the The first color of light that first color of light of two light sources transmitting is used to generate with the Wavelength converter carries out light combination and constitutes institute The first color of light of light emitting device sending is stated, the first color of light that the Wavelength converter generates includes that first color is glimmering The first color of light in the second color of light that the first color of light and the second color fluorescence material that luminescent material generates generate. The regulating device is used to obtain one in the actual color coordinate and intrinsic brilliance of the first color of light that the light emitting device issues Kind or two kinds, and one or both of the actual color coordinate of first color of light that will acquire and intrinsic brilliance with it is scheduled One or both of the reference color coordinate of first color of light and normal brightness compare.The light source control portion is comparing The driving current of the first light source and the driving current of the second light source are adjusted when the two is unequal, so that described shine The actual color coordinate for the first color of light that device issues and the reference color coordinate and standard of intrinsic brilliance and first color of light Brightness is consistent.

Preferably, the light emitting device further includes detection device, and the detection device is for detecting the light emitting device hair One or both of actual color coordinate and intrinsic brilliance of the first color of light out, and the reality for the first color of light that will test One or both of border chromaticity coordinates and intrinsic brilliance are supplied to the regulating device.

Preferably, when described the two to compare is unequal, the light source control portion adjusts the driving electricity of first light source Stream is so that the brightness for the first color of light that Wavelength converter generates is Y1 ', if the first face that Wavelength converter generates at this time The chromaticity coordinates of coloured light is (x1 ', y1 '), and the regulating device also controls the light source control portion and adjusts the second light source Driving current makes the brightness of the first color of light of the second light source transmitting be Y2 '；Above-mentioned each parameter Y1 ', Y2 ', x1 ', y1 ' Meet following formula: Y1+Y2=Y1 '+Y2 '；(Y1 × x1/y1+Y2 × x2/y2)/(Y1/y1+Y2/y2)=(Y1 ' × x1 '/ y1'+Y2'×x2/y2)/(Y1'/y1+Y2'/y2)；And (Y1+Y2)/(Y1/y1+Y2/y2)=(Y1 '+Y2 ')/(Y1 '/y1+ Y2'/y2)；Wherein: the first color of light that the light emitting device issues under an original state reaches the reference color coordinate and described When normal brightness, the brightness for the first color of light that the Wavelength converter generates is expressed as Y1, chromaticity coordinates be expressed as (x1, Y1), the brightness of the first color of light of the second light source transmitting is expressed as Y2, chromaticity coordinates is expressed as (x2, y2).

Preferably, the original state is the shape that aging does not occur for the first color fluorescence material and the second color fluorescence material State.

Preferably, the Wavelength converter further includes the second sectional area, and second sectional area carries third face Color fluorescent material, the third color fluorescence material are excited by the light of the first light source and generate third color of light；The tune Regulating device is also used to obtain the intrinsic brilliance for the third color of light that second sectional area issues, and the third color that will acquire Compared with the normal brightness of scheduled third color of light, the light source control portion is comparing the intrinsic brilliance of light The driving current of the first light source is adjusted when the two is unequal, so that the third color of light that second sectional area issues Intrinsic brilliance it is consistent with the normal brightness of the third color of light.

Preferably, the first color fluorescence material is red fluorescence material, and the second color fluorescence material is yellow Fluorescent material, the third color fluorescence material are green fluorescent material, and first color of light is red light, second face Coloured light is sodium yellow, and the third color of light is green light, and second color of light can isolate red light and green light.

Preferably, in one embodiment, the Wavelength converter further includes third sectional area, the first light source The 4th color of light is issued, the third sectional area is transmitted or scattered and projected to the 4th color of light of the first light source 4th color of light；The regulating device is also used to obtain the intrinsic brilliance for the 4th color of light that the third sectional area issues, And the intrinsic brilliance for the 4th color of light that will acquire is compared with the normal brightness of scheduled 4th color of light, the light source Control unit adjusts the driving current of the first light source when the two to compare is unequal, so that the third sectional area The intrinsic brilliance of the 4th color of light issued is consistent with the normal brightness of the 4th color of light.

Preferably, in another embodiment, the Wavelength converter further includes third sectional area, the third point Section region carries the 4th color fluorescence material, and the first light source issues ultraviolet light, and the 4th color fluorescence material is by described The light of first light source excites and generates the 4th color of light；The regulating device is also used to obtain what the third sectional area issued In the intrinsic brilliance of 4th color of light, and the intrinsic brilliance of the 4th color of light that will acquire with scheduled 4th color of light Normal brightness compares, and the light source control portion adjusts the driving electricity of the first light source when the two to compare is unequal Stream, so that the normal brightness of the intrinsic brilliance for the 4th color of light that the third sectional area issues and the 4th color of light Unanimously.

Preferably, the 4th color of light is blue light.

The present invention also provides a kind of optical projection systems comprising light emitting device, the light emitting device include first light source, wavelength Conversion equipment, second light source, light source control portion and regulating device.The Wavelength converter includes at least the first sectional area, The mixture of the carrying of first the sectional area first color fluorescence material and the second color fluorescence material, first color are glimmering Luminescent material is excited by the light of the first light source and generates the first color of light, and the second color fluorescence material is by first light The light in source excites and generates the second color of light, and second color of light can isolate the first color of light and another color of light.Institute State second light source for emit the first color of light, the first color of light of second light source transmitting is used for and wavelength convert dress The first color of light for setting generation carries out light combination and constitutes the first color of light that the light emitting device issues, the Wavelength converter The first color of light generated includes the first color of light and second color fluorescence that the first color fluorescence material generates The first color of light in the second color of light that material generates.The regulating device is used to obtain the light emitting device issues first One or both of actual color coordinate and intrinsic brilliance of color of light, and the practical color of first color of light that will acquire are sat One of mark and one or both of intrinsic brilliance and the reference color coordinate of scheduled first color of light and normal brightness or Two kinds compare.The light source control portion adjusts driving current and the institute of the first light source when the two to compare is unequal The driving current of second light source is stated, so that the actual color coordinate and intrinsic brilliance of the first color of light that the light emitting device issues It is consistent with the reference color coordinate of first color of light and normal brightness.

Preferably, the Wavelength converter further includes the second sectional area, and second sectional area carries third face Color fluorescent material, the third color fluorescence material are excited by the light of the first light source and generate third color of light.

Preferably, the regulating device be also used to obtain the third color of light that second sectional area issues reality it is bright Degree, and the intrinsic brilliance of third color of light that will acquire is compared with the normal brightness of scheduled third color of light, it is described Light source control portion adjusts the driving current of the first light source when the two to compare is unequal, so that second segmentation The intrinsic brilliance for the third color of light that region issues is consistent with the normal brightness of the third color of light.

Preferably, the 4th color of light is blue light.

The present invention further provides a kind of optical projection system, the optical projection system includes light emitting device, light valve, light source control portion And regulating device.The light emitting device includes first light source, Wavelength converter and second light source.The Wavelength converter packet Include at least the first sectional area, first sectional area carries the mixed of the first color fluorescence material and the second color fluorescence material Zoarium, the first color fluorescence material are excited by the light of the first light source and generate the first color of light, second color Fluorescent material is excited by the light of the first light source and generates the second color of light, and second color of light can isolate the first face Coloured light and another color of light.The second light source, for emitting the first color of light, the first color of light of the second light source transmitting The first color of light for generating with the Wavelength converter carries out light combination and constitutes the first face that the light emitting device issues Coloured light, the first color of light that the Wavelength converter generates include the first color of light that the first color fluorescence material generates And the first color of light in the second color of light of the second color fluorescence material generation.The light valve is for receiving the hair The first color of light that electro-optical device issues carries out image modulation with the second color of light and according to predetermined image data to be emitted modulation figure As light.The projection lens is for receiving the modulation image light to show predetermined image.The regulating device is for obtaining Take one in the actual color coordinate and intrinsic brilliance of the first color of light in the modulation image light or the predetermined image Kind or two kinds, and the light valve that will acquire issue or the practical color of first color of light in the predetermined image sit One of mark and one or both of intrinsic brilliance and the reference color coordinate of scheduled first color of light and normal brightness or Two kinds compare, and the light source control portion adjusts driving current and the institute of the first light source when the two to compare is unequal The driving current of second light source is stated, so that the actual color coordinate and intrinsic brilliance of the first color of light that the light emitting device issues It is consistent with the reference color coordinate of first color of light and normal brightness.

Compared to the prior art, the driving current that light emitting device of the present invention and optical projection system pass through the adjusting first light source And the driving current of the second light source is so that the modulation image light that the light emitting device issues, described or described predetermined The actual color coordinate and intrinsic brilliance of the first color of light in image keep it consistent with the reference color coordinate and normal brightness, It can be effectively improved the bad phenomenon of white balance caused by colour cast or luminance shortage, improve Projection Display effect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of light emitting device first embodiment of the present invention.

Fig. 2 is a kind of planar structure schematic diagram of Wavelength converter.

Fig. 3 is the light-source system for the various colors light that first light source is projected via Wavelength converter.

Fig. 4 is the timing diagram for the compensation light that second light source issues.

Fig. 5 is spectral comparison schematic diagram of the light of Wavelength converter sending before and after fluorescent material aging.

Fig. 6 is the structural schematic diagram of light emitting device second embodiment of the present invention.

Fig. 7 is the structural schematic diagram of light emitting device third embodiment of the present invention.

Fig. 8 is the structural schematic diagram of the 4th embodiment of light emitting device of the present invention.

Fig. 9 is the timing diagram for the compensation light that third light source shown in Fig. 8 issues.

Figure 10 is the block diagram of optical projection system first embodiment of the present invention.

Figure 11 is the block diagram of optical projection system second embodiment of the present invention.

Main element symbol description

Light emitting device 100,200,300,400

Light source assembly 110

Wavelength converter 120,220,320,420,620

Detect regulating device 130,630

First light source 112,212,312,412,612

Second light source 114,214,314,414,614

Multiplexing apparatus 140,242,340,440

First sectional area 122

Second sectional area 124

Third sectional area 126

Even light and light relay system 150,250,350,450

Reflection unit 360,460

Detection device 132,632

Regulating device 134,634

Light source control portion 136,636

Optical projection system 50,60

Light emitting device 41,61,600

Light valve 52,62

Projection lens 54,64

Projection screen 55,65

Control device 53

First period T1

Second period T2

Third period T3

Green spectrum curve G1, G2

Blue light spectrum curve B1, B2

Yellow spectrum curve Ye1, Ye2

Red-light spectrum curve R1, R2

The present invention that the following detailed description will be further explained with reference to the above drawings.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.In the absence of conflict, the feature in following embodiment and embodiment can To be combined with each other.

It should be noted that in the present invention, when a component is considered as with another component " being connected ", it can be with It is to be connected directly with another component, is also possible to be indirectly connected by component placed in the middle and another component.

Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.

In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention Specific embodiment be described in detail.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention In the case of do similar application, therefore the present invention is not limited by the specific embodiments disclosed below.

Secondly, combination schematic diagram of the present invention is described in detail, when describing the embodiments of the present invention, for purposes of illustration only, table Show that the sectional view of device architecture can disobey general proportion and make partial enlargement, and the schematic diagram is example, is not answered herein Limit the scope of protection of the invention.In addition, the three-dimensional space of length, width and depth should be included in actual fabrication.

It is described in detail below by several embodiments.

The light emitting device of first embodiment

Referring to Fig. 1, Fig. 1 is the structural schematic diagram of 100 first embodiment of light emitting device of the present invention.The light emitting device 100 include light source assembly 110 and Wavelength converter 120.

The light source assembly 110 includes first light source 112 and second light source 114.The first light source 112 is exciting light Source, for issuing exciting light, such as blue excitation light, the first light source 112 can be blue laser light source (or blue laser Device).In a kind of change embodiment, the first light source 112 is also possible to the light source of other colors, not with blue-light source It is limited, such as first light source 112 can be ultraviolet laser light source (or ultraviolet laser), to issue uv excitation light. Further, the first light source 112 is preferably semiconductor laser light resource, to provide the exciting light of high brightness.

The second light source 114 can be compensatory light, for generating compensation light, such as red compensation light, but not with red Colorimetric compensation light is limited, when needing to compensate the light of other colors such as blue or green, the second light source 114 or hair The supplement light source of the light of other colors such as blue or green out.Further, the second light source 114 can be light-emitting diodes Pipe light source, such as red light emitting diodes issue red compensation light.

In present embodiment, the light emitting device 100 further includes Multiplexing apparatus 140, and what the first light source 112 generated swashs The compensation light generated with the second light source 114 that shines reenters after the Multiplexing apparatus 140 carries out light combination is incident upon the wavelength Conversion equipment 120.Specifically, in present embodiment, the Multiplexing apparatus 140 is set to the first light source 112 and the wave It can be a light combination diaphragm, the light combination diaphragm can be at 45 degree relative to the first light source between long conversion equipment 120 Overturning angle setting, the exciting light that the first light source 112 issues are incident to the wavelength directly through the Multiplexing apparatus 140 and turn Changing device 120.The second light source 114 is set to above or below the Multiplexing apparatus 140, the Multiplexing apparatus 140 also phase The second light source 114 is arranged at 45 degree of overturning angles, the compensation light that the second light source 114 issues is incident to the light combination Device 140, and the Wavelength converter 120 is provided to after the Multiplexing apparatus 140 reflection.

The Wavelength converter 120 is for receiving the light of the light source assembly 110 via the Multiplexing apparatus 140 and penetrating The light of at least two color out.Referring to Fig. 2, Fig. 2 is the planar structure schematic diagram of the Wavelength converter 120.Institute Stating Wavelength converter 120 is discoid colour wheel comprising along at least two sectional areas of its circular motion direction setting (such as 122,124,126), for projecting at least two light respectively.In present embodiment, the Wavelength converter 120 is The light of transmission-type Wavelength converter, i.e., the described light source assembly 110 is incident from the side of the Wavelength converter 120, and Project at least two light in the other side of the Wavelength converter 120.It is appreciated that at least two sectional area The size of (such as 122,124,126) can be set as identical or different according to actual needs.

In present embodiment, the quantity of the sectional area (122,124,126) is three, the Wavelength converter 120 Including the first sectional area 122, the second sectional area 124 and third sectional area 126.

First sectional area 122 carries the mixture of the first color fluorescence material and the second color fluorescence material, institute It states the first color fluorescence material to be excited by the light of the first light source 112 and generate the first color of light, second color fluorescence Material is excited by the light of the first light source 112 and generates the second color of light, and second color of light can isolate the first face Coloured light and third color of light.It is appreciated that the first color fluorescence material can be uniform with the second color fluorescence material First sectional area 122 is mixed and be set to, first sectional area 122 can also be set to subregion.This embodiment party In formula, the first color fluorescence material is red fluorescence material, and the second color fluorescence material is yellow fluorescent material.Institute Stating the first color of light is red light.Second color of light is sodium yellow.The third color of light is green light.It is appreciated that The first color of light that the Wavelength converter 120 generates include the first color of light for generating of the first color fluorescence material with And the first color of light in the second color of light of the second color fluorescence material generation.

Second sectional area 124 carries third color fluorescence material, and the third color fluorescence material is by described the The light of one light source excites and generates third color of light.The third color fluorescence material is green fluorescent material, the third face Coloured light is green light.

The third sectional area 126 receives the light of the first light source 112 and is emitted the 4th color of light.Described Four color of light are blue light.It is appreciated that in present embodiment, first color of light, third color of light and the 4th color of light For three primary colours light, such as red, green, blue three primary colours light.

In one embodiment, the first light source 112 issues blue excitation light, and the third sectional area 126 can It is transmitted or is scattered with the 4th color of light to the first light source and project the 4th color of light.Preferably, the third point Scattering layer is provided on section region 126, the scattering layer issues blue excitation light to the first light source 112 and is scattered, To which the third sectional area 126 issues the 4th color of light.

In another embodiment, the first light source 112 issues burst of ultraviolel light, the third sectional area 126 The 4th color fluorescence material is carried, the 4th color fluorescence material is excited by the light of the first light source and generates the 4th color Light, so that the third sectional area 126 issues the 4th color of light.

It is appreciated that the second light source 114 is for emitting the first color of light in present embodiment.The second light source The first color of light that first color of light of 112 transmittings and the Wavelength converter 120 generate carries out light combination and constitutes the hair The first color of light that electro-optical device 100 issues.

Please refer to Fig. 3 and Fig. 4, light-source system when Fig. 3 and Fig. 4 are light emitting device 100 of the present invention work.Specifically Ground, Fig. 3 are the light-source systems for the various colors light that the first light source 112 is projected via Wavelength converter 120.In Fig. 3 The driving current value of the first light source 112 shown is different during each color of light is emitted, but the present invention is not limited thereto； During the outgoing of each color of light, the driving current value of first light source 112 can be identical.Fig. 4 is that the second light source 114 issues Compensate the timing diagram of light.The light emitting device 100 work when, the Wavelength converter 120 using the center of its circumference as axis not Disconnected rotation, so that first sectional area 122, the second sectional area 124 and 126 received in sequence of third sectional area are described in The light that Multiplexing apparatus 140 projects.

In the first embodiment, the first light source is blue light excitation light source, in the first period T1, the first light source 112 issue blue lights, and the second light source 114 issues red light, and first sectional area 126 is from the Multiplexing apparatus 140 The blue light of the first light source 112 and the red light of second light source 114 are received, the blue light excites first sectional area 126 red fluorescence material and yellow fluorescent material generates red light and sodium yellow and projects the Wavelength converter 120, institute The red light for stating second light source 114 directly projects the Wavelength converter 120 via first sectional area 126, at this point, The light emitting device 100 issues red light and sodium yellow.In the second period T2, the first light source 112 issues blue light, described Second sectional area 124 receives the blue light that the Multiplexing apparatus 140 projects, and the blue light excites second sectional area 124 green fluorescent material generates green light and projects the Wavelength converter 120, at this point, the light emitting device 100 issues Green light.In third period T3, the first light source 112 issues blue light, and the third sectional area 126 receives the light combination The blue light that device 140 projects, the blue light projects after being scattered via the third sectional area 126, at this point, described Light emitting device 100 issues blue light.Find out from the lighting timings of light emitting device 100 described above, in the first period T1, The red light that the light emitting device 100 issues includes that the first light source 112 excites the red of the generation of the first sectional area 126 The compensation red light that coloured light (red light that the i.e. described Wavelength converter 120 issues) and second light source 114 project, Ci Zhongshe Meter can be effectively improved the phenomenon of the red light intensity deficiency of the lower caused light emitting device 100 of existing red fluorescence material efficiency, Improve red light intensity.It is appreciated that the red light that the Wavelength converter 120 issues includes that the first light source 112 excites The red light that first color fluorescence material of first sectional area 126 generates, and excitation first sectional area 126 The second color fluorescence material generate sodium yellow in red light part.

However, it will be understood that in another embodiment, the first light source is ultraviolet excitation light source, at first Section T1, the first light source 112 issue ultraviolet light, and the second light source 114 issues red light, first sectional area 126 The ultraviolet light of the first light source 112 and the red light of second light source 114, the ultraviolet light are received from the Multiplexing apparatus 140 It excites the red fluorescence material of first sectional area 126 and yellow fluorescent material to generate red light and sodium yellow and projects institute Wavelength converter 120 is stated, the red light of the second light source 114 directly projects via first sectional area 126 described Wavelength converter 120, at this point, the light emitting device 100 issues red light and sodium yellow.In the second period T2, described first Light source 112 issues ultraviolet light, and second sectional area 124 receives the ultraviolet light that the Multiplexing apparatus 140 projects, described ultraviolet Light excites the green fluorescent material of second sectional area 124 to generate green light and projects the Wavelength converter 120, this When, the light emitting device 100 issues green light.In third period T3, the first light source 112 issues ultraviolet light, the third Sectional area 126 receives the ultraviolet light that the Multiplexing apparatus 140 projects, third sectional area 126 described in the ultraviolet excitation Blue fluorescent material generate and blue light and project the Wavelength converter 120, at this point, the light emitting device 100 issues indigo plant Coloured light.Find out from the lighting timings of light emitting device 100 described above, in the first period T1, the light emitting device 100 is sent out Red light out includes red light (the i.e. described wavelength turn that the first light source 112 excites first sectional area 126 to generate The red light that changing device 120 issues) and the compensation red light that projects of second light source 114, such design can be effectively improved existing There is the phenomenon of the red light intensity deficiency of the lower caused light emitting device 100 of red fluorescence material efficiency, improves red light intensity.It can be with Understand, the red light that the Wavelength converter 120 issues includes that the first light source 112 excites first sectional area The red light that 126 the first color fluorescence material generates, and the second color fluorescence material of excitation first sectional area 126 Expect the red light part in the sodium yellow generated.

Further, the light emitting device 100 can also include even light and light relay system 150, in the even light and light Receive the light that the Wavelength converter 120 projects after system 150, the light for projecting the Wavelength converter 120 into Optical projection system is provided to after the processing such as the even light of row, collection and shaping (for example, the projected spot of light beam is made to meet predetermined shape) Light valve so that the light valve (such as DMD/LCD/LCOS spatial light modulator) according to predetermined image data to the wavelength convert The light that device 120 projects is modulated so that homolographic projection camera lens shows predetermined image.

It is appreciated that guarantee that the light emitting device 100 and the modulation timing of the light valve are adapted, the light source assembly 110 rotation speed for unlatching and closing timing and the Wavelength converter 120 and timing needs to cooperate, specifically, can To be uniformly controlled the unlatching and closing of the light source assembly 110 according to input image data by control device, the wavelength turns The modulation timing of the rotation of changing device 120 and the light valve, so that three is adapted.

However, in above-mentioned light emitting device 100, on the Wavelength converter 120 fluorescent material of each sectional area with Elongated using the time will appear aging, this is by first color of light for generating the Wavelength converter 120 and the Second colors light, third color of light and the 4th color of light tail off.For above situation, if what the Wavelength converter 120 issued Third color of light and the 4th color of light are tailed off due to fluorescent material aging (it is appreciated that the 4th color of light herein is by swashing The 4th color of light in embodiment that light emitting source excitated fluorescent powder generates), the driving of the adjusting first light source 112 can be passed through Electric current supplements the third color of light and the 4th color of light.

Specifically, referring to Fig. 5, Fig. 5 is the light of the sending of Wavelength converter 120 before and after fluorescent material aging Spectral comparison schematic diagram, dotted line are spectral curve of the light of the Wavelength converter 120 sending before fluorescent material aging (can also become standard curve), solid line are spectrum of the light of the Wavelength converter 120 sending after fluorescent material aging Curve graph.Due to the waveform of green spectrum curve G1 and G2 before and after fluorescent material aging be it is similar, by described second Period T2 adjusts the driving current of the first light source 112 to supplement the third color of light (i.e. green light), can make The green spectrum curve G1 of green spectrum curve and standard curve after adjusting is essentially coincided, and adjusts the color of the green light of front and back Coordinate is basically unchanged.Similarly, due to the waveform of blue light spectrum curve B1 and B2 before and after fluorescent material aging be it is similar, pass through It is (i.e. blue to supplement the 4th color of light to adjust the driving current of the first light source 112 in the third period T3 Light), the blue light spectrum curve B1 of the blue light spectrum curve after adjusting and standard curve can be made to essentially coincide, and adjust front and back The chromaticity coordinates of blue light be basically unchanged.

Specifically, as shown in Figure 1, the light emitting device 100 may include detection regulating device 130.The detection is adjusted Device 130 includes detection device 132, regulating device 134 and light source control portion 136.The detection device 132 detects described shine The intrinsic brilliance for the third color of light that second sectional area 124 of device 100 issues, and second segment identifier that will test It is provided in the intrinsic brilliance for the third color of light that domain 124 issues and arrives the regulating device 134.The regulating device 134 will acquire Third color of light the intrinsic brilliance compared with the normal brightness of scheduled third color of light, and in two to compare The driving current that the light source control portion 136 adjusts the first light source 112 is controlled when person is unequal, so that described second point The intrinsic brilliance for the third color of light that section region 124 issues is consistent with the normal brightness of the third color of light.

Preferably, the detection device 132 detects the third that the second sectional area 124 of the light emitting device 100 issues The intrinsic brilliance of color of light, and the intrinsic brilliance of the third color of light for second sectional area 124 sending that will test mentions It is supplied to the regulating device 134.The intrinsic brilliance for the third color of light that the regulating device 134 will acquire and scheduled the The normal brightness of three color of light compares, and controls the light source control portion 136 when the two to compare is unequal and adjust institute The driving current (driving current of first light source 112 as described in increasing) for stating first light source 112, so that second segment identifier The intrinsic brilliance for the third color of light that domain 124 issues is consistent with the normal brightness of the third color of light.

It is appreciated that the normal brightness of the scheduled third color of light can be pre-stored within a storage unit, (figure is not Show) in, the regulating device 134 can be transferred from the storage unit normal brightness of the scheduled third color of light with Just it is compared.The normal brightness of the scheduled third color of light can be the light emitting device 100 under an original state Second sectional area 124 (before the fluorescent material aging of such as described second sectional area 124, specifically can be set to light emitting device 100 Before factory) issue third color of light normal brightness.

Further, the third sectional area 126 that the detection device 132 can also detect the light emitting device 100 is sent out The intrinsic brilliance of the 4th color of light out, and the reality of the 4th color of light of the third sectional area 126 sending that will test Border brightness is provided to the regulating device 134.In the intrinsic brilliance for the 4th color of light that the regulating device 134 will acquire Compared with the normal brightness of scheduled 4th color of light, and the light source control portion is controlled when the two to compare is unequal 136 adjust the driving current of the first light source 112, so that the 4th color of light that the third sectional area 126 issues Intrinsic brilliance is consistent with the normal brightness of the 4th color of light.

Preferably, the detection device 132 detects the 4th of the sending of third sectional area 126 of the light emitting device 100 The intrinsic brilliance of color of light, and the intrinsic brilliance of the 4th color of light of the third sectional area 126 sending that will test mentions It is supplied to the regulating device 134.The intrinsic brilliance for the 4th color of light that the regulating device 134 will acquire respectively with it is predetermined The normal brightness of third color of light compare, and control the light source control portion 136 when the two to compare is unequal and adjust The driving current (driving current of first light source 112 as described in increasing) for saving the first light source 112, so that the third point The intrinsic brilliance for the 4th color of light that section region 126 issues is consistent with the normal brightness of the 4th color of light.

It is appreciated that the normal brightness of scheduled 4th color of light can be pre-stored in a storage unit, institute The normal brightness of scheduled 4th color of light can be transferred from the storage unit to be compared by stating regulating device 134 Compared with.The normal brightness of scheduled 4th color of light can be the third segmentation of the light emitting device 100 under an original state Region (before the fluorescent material aging of such as described third sectional area, before specifically can be set to the factory of light emitting device 100) issues The normal brightness of 4th color of light.

But if the first color of light of the sending of the Wavelength converter 120 is with the second color of light since fluorescent material is old Change and tails off, Huang, red-light spectrum curve Ye2, R2 after aging as shown by the solid line, due to the Wavelength converter 120 First sectional area 122 includes the first color fluorescence material and the second color fluorescence material (i.e. red fluorescence material With yellow fluorescent material), the first color fluorescence material and the second color fluorescence material chronological aging degree are not Together, the simple driving current by adjusting the first light source 112 can not make the Huang after adjusting, red-light spectrum curve and mark Huang, red-light spectrum curve Ye1, R1 of directrix curve are overlapped simultaneously.Therefore, increase the driving current of first light source 112 merely, although The brightness of the first color of light of the generation of Wavelength converter 120 can be increased, but Wavelength converter 120 cannot be generated The chromaticity coordinates of first color of light is adjusted to the chromaticity coordinates value before fluorescent material aging.

The first color of light that the first color of light that the light emitting device 100 issues is generated by Wavelength converter 120 and the Two light sources 114 issue the first color photosynthesis, the present invention in, second light source 114 emit the first color of light chromaticity coordinates not Change with the change of the light emission luminance (i.e. the brightness of the first color of light of its transmitting) of second light source.

In order to make light emitting device 100 issue the first color of light brightness and chromaticity coordinates reach the shape before fluorescent powder aging State, on the basis of adjusting the driving current of the first light source 112, it is also necessary to further adjust the second light source 114 Driving current.

Specifically, the detection device 132 detects the actual color coordinate for the first color of light that the light emitting device 100 issues One or both of with intrinsic brilliance, and will test to one of the actual color coordinate of the first color of light and intrinsic brilliance or Two kinds are provided to the regulating device 134.The actual color coordinate for the first color of light that the regulating device 134 will acquire and One or both of one or both of intrinsic brilliance and the reference color coordinate of scheduled first color of light and normal brightness It compares, and controls when the two to compare is unequal the driving that the light source control portion 136 adjusts the first light source 112 Driving current (as described in the increasing driving current of first light source 112 and the second light source of electric current and the second light source 114 114 driving current, or increase the driving current of the first light source 112 and reduce the driving current of the second light source 114 Deng), so that the actual color coordinate and intrinsic brilliance of the first color of light that the light emitting device 100 issues and first color The reference color coordinate of light is consistent with normal brightness.Wherein it is possible to understand, as previously mentioned, in present embodiment, the light emitting device 100 the first color of light issued include that the first color of light of the transmitting of second light source 114 and the Wavelength converter 120 produce The first raw color of light, and the first color of light that the Wavelength converter 120 generates includes the first color fluorescence material The first color of light in the second color of light that the first color of light generated and the second color fluorescence material generate.

Preferably, in present embodiment, the detection device 132 detects the first color that the light emitting device 100 issues The actual color coordinate and intrinsic brilliance of light, and the actual color coordinate for first color of light that will test and intrinsic brilliance provide To the regulating device 134.The actual color coordinate and intrinsic brilliance for the first color of light that the regulating device 134 will acquire Respectively compared with the reference color coordinate of scheduled first color of light and normal brightness, and the two to compare at any one is not The light source control portion 136 is controlled when equal adjusts the driving current of the first light source 112 and the drive of the second light source 114 Streaming current so that the light emitting device 100 issue the first color of light actual color coordinate and intrinsic brilliance respectively with it is described The reference color coordinate of first color of light is consistent with normal brightness.

It is appreciated that the reference color coordinate and normal brightness of scheduled first color of light can be pre-stored within one and deposit In storage unit, the regulating device 134 can transfer the reference colour of scheduled first color of light from the storage unit Coordinate and normal brightness are to be compared.The reference color coordinate and normal brightness of scheduled first color of light can be one (fluorescent material of such as described first sectional area 122 is old for the first sectional area 122 of the light emitting device 100 under original state Before change, specifically can be set to light emitting device factory before) issue the first color of light reference color coordinate and normal brightness.

Further, when being located at the original state, the brightness for the first color of light that the Wavelength converter 120 generates Be (x1, y1) for Y1, chromaticity coordinates, the brightness for the first color of light that the second light source 114 emits is Y2, chromaticity coordinates be (x2, Y2), when above-mentioned the two to compare is unequal, the driving current that the light source control portion 136 adjusts first light source 112 makes The brightness for the first color of light that Wavelength converter 120 generates is Y1 ', if the first face that Wavelength converter 120 generates at this time The chromaticity coordinates of coloured light is (x1 ', y1 '), and the regulating device 134 also controls the light source control portion 136 and adjusts described second The brightness for the first color of light that the driving current of light source 114 emits the second light source 114 is Y2 ', and second light The chromaticity coordinates for the first color of light that source 114 emits remains as (x2, y2).To guarantee that the practical color of the first color of light after adjusting is sat Mark and intrinsic brilliance are consistent with the reference color coordinate of first color of light and normal brightness respectively, above-mentioned each parameter Y1, Y2, X1, y1, x2, y2, Y1 ', Y2 ', x1 ', y1 ' meet following three formula:

Y1+Y2=Y1 '+Y2 '；

(Y1 × x1/y1+Y2 × x2/y2)/(Y1/y1+Y2/y2)=(Y1 ' × x1 '/y1 '+Y2 ' × x2/y2)/(Y1 '/ y1+Y2'/y2)；And

(Y1+Y2)/(Y1/y1+Y2/y2)=(Y1 '+Y2 ')/(Y1 '/y1+Y2 '/y2).

Wherein, although the first color fluorescence material and the second color fluorescence material can gradually aging, in equal intensities First color of light caused by under the irradiation of exciting light can gradually tail off, since the degree of the two aging is inconsistent, the two The chromaticity coordinates of the mixed light of generated first color of light can also change, but this is a longer process.Shorter A period of time in, the amount for the first color of light that detection device detects is constant.It is believed that the first color fluorescence material A stable state, the mixing of the first color of light caused by the two are within the short period with the second color fluorescence material The chromaticity coordinates of light does not generate variation yet, even if the intensity of exciting light changes.Although that is, the wavelength convert fills The chromaticity coordinates of the first color of light of 120 generations is set relative to being changed before fluorescent material aging, and in first light source 112 Before and after drive current adjustment in this short period, the chromaticity coordinates for the first color of light that the Wavelength converter 120 generates is Constant.Therefore, the chromaticity coordinates (x1 ', y1 ') of the first above-mentioned color of light can be measured by detection device 132 and be obtained.It goes forward side by side The chromaticity coordinates (x1 ', y1 ') and above-mentioned formula that one step is obtained according to measurement calculate Y1 ' and Y2 '.

Further, the detection device 132 can be the detection devices such as spectrometer.But implement in a kind of change In mode, the light emitting device 100 can not also include the detection device, that is to say, peripherals detector pair can be passed through The first color of light, third color of light and the 4th color of light that the light emitting device 100 issues carry out intrinsic brilliance and practical color is sat Target detection, but the light emitting device may include input unit, can be detected the peripheral hardware by the input unit The first color of light, third color of light and the 4th color of light that device detects are provided to the regulating device 132, so as to the tune Regulating device 132 is compared and adjusts.

Compared to the prior art, light emitting device 100 of the present invention is by adjusting the driving current of the first light source and described The driving current of second light source 114 so that the first color of light that the light emitting device 100 issues actual color coordinate and reality Brightness is consistent with the reference color coordinate and normal brightness etc. respectively, can be effectively improved white flat caused by colour cast and luminance shortage Weigh bad phenomenon, improves and uses the 100 Projection Display effect of light emitting device.Especially for using the second light source 114 carry out the light emitting device 100 of light filling, and the setting of the second light source 114 can be reduced caused by certain color of light accounting deficiency The phenomenon that poor display effect.

The light emitting device of second embodiment

Referring to Fig. 6, Fig. 6 is the structural schematic diagram of 200 second embodiment of light emitting device of the present invention.The light emitting device 200 is essentially identical with the structure of the light emitting device 100 of first embodiment, that is to say, that above-mentioned to be directed to the light emitting device 100 Description substantially can be applied to the light emitting device 200, be not described in more detail here, the light emitting device 200 and first real The difference for applying the light emitting device 100 of mode essentially consists in: the second light source 214 of the light emitting device 200 is set with first light source 212 It is placed in the not ipsilateral of Wavelength converter 220, specifically, the exciting light that the first light source 212 generates turns via the wavelength The compensation light generated again with the second light source 214 after changing device 220 provides again after the Multiplexing apparatus 242 carries out light combination Subsequent even light and light relay system 250.

The light emitting device of third embodiment

Referring to Fig. 7, Fig. 7 is the structural schematic diagram of 300 third embodiment of light emitting device of the present invention.The light emitting device 300 is essentially identical with the structure of the light emitting device 100 of first embodiment, that is to say, that above-mentioned to be directed to the light emitting device 300 Description substantially can be applied to the light emitting device 300, be not described in more detail here, the light emitting device 300 and first real The difference for applying the light emitting device 100 of mode essentially consists in: the Wavelength converter is reflective Wavelength converter, specifically Ground, the light that the first light source 312 issues are provided to the Wavelength converter 320 after reflecting via a reflection unit 360.Institute The light for stating the injection of Wavelength converter 320 is closed with the compensation light that the second light source 314 generates through the Multiplexing apparatus 340 Subsequent even light and light relay system 350 are provided again after light.

The light emitting device of 4th embodiment

Referring to Fig. 8, Fig. 8 is the structural schematic diagram of the 4th embodiment of light emitting device 400 of the present invention.The light emitting device 400 is essentially identical with the structure of the light emitting device 300 of third embodiment, that is to say, that above-mentioned to be directed to the light emitting device 300 Description substantially can be applied to the light emitting device 400, be not described in more detail here, the light emitting device 200 is real with third The difference for applying the light emitting device 300 of mode essentially consists in: the light source assembly 410 further includes third light source 416, the third light Source 416 is also compensatory light, for generating compensation light.Specifically, in present embodiment, the third light source 416 is blue light benefit Light source is repaid, blue light is issued.

The exciting light that the first light source 412 generates is provided to the wavelength convert and fills after reflecting via reflection unit 460 Set 420.The benefit that the light and the second light source 414 and the third light source 416 that the Wavelength converter 420 projects generate It repays light and provides subsequent even light and light relay system 450 again after the Multiplexing apparatus 440 carries out light combination.

Specifically, the output light of the Wavelength converter 420 of the light emitting device 400 and second light source 412 and Fig. 3 and figure The Wavelength converter 120 of first embodiment shown in 4 and the output light sequential of second light source 112 are essentially identical, herein It repeats no more.And the light-source system of the third light source 416 is referring to Fig. 9, the third light source 416 is sent out in third period T3 Blue light out, for being compensated to blue light.

The optical projection system of first embodiment

Referring to Fig. 10, Figure 10 is the block diagram of 50 first embodiment of optical projection system of the present invention.The projection system System 50 includes light emitting device 51, light valve 52, control device 53, projection lens 54 and projection screen 55.The light emitting device 51 is used In offer light to the light valve 52.The light valve 52 can be but be not limited to DMD/LCD/LCOS spatial light modulator.

The control device 53 carries out image modulation for receiving input image data and controlling the light valve 52.The light Valve 52 is used to receive the light that the light emitting device issues and carries out image modulation according to predetermined image data to be emitted modulation image Light.The projection lens 54 receives the modulation image light to show predetermined image on the projection screen 55.It is described Light emitting device 51 can using the above-mentioned any one embodiment of first to fourth embodiment light emitting device 100,200,300, 400。

The optical projection system of second embodiment

Figure 11 is please referred to, Figure 11 is the block diagram of 60 second embodiment of optical projection system of the present invention.The projection system System 60 and the main distinction of the optical projection system 50 of first embodiment are: the detection device 632 of detection regulating device 630 is neighbouring One of them setting of light valve 62, projection lens 64 or projection screen 65.The detection device 632 is penetrated for detecting the light valve 62 The first color of light in predetermined image that modulation image light or the projection lens 64 and projection screen 65 out is shown One or both of actual color coordinate and intrinsic brilliance, and the light valve 62 that will acquire is issuing or the predetermined image In first color of light mark with scheduled first color of light of actual color coordinate and one or both of intrinsic brilliance One or both of quasi- chromaticity coordinates and normal brightness compare, and the light source control is controlled when the two to compare is unequal Portion 636 processed adjusts the driving current of the first light source 612 and the driving current of the second light source 614, so that the light The first face in predetermined image that the modulation image light or the projection lens 64 and projection screen 65 that valve 62 projects are shown The actual color coordinate and intrinsic brilliance of coloured light are consistent with the reference color coordinate of first color of light and normal brightness.

Preferably, in present embodiment, the detection device 632 detect the modulation image light that the light valve 62 projects or The actual color coordinate and reality for the first color of light in predetermined image that projection lens 64 described in person and projection screen 65 are shown are bright Degree, and the actual color coordinate for first color of light that will test and intrinsic brilliance are provided to the regulating device 65.It is described The actual color coordinate and intrinsic brilliance for the first color of light that regulating device 634 will acquire respectively with scheduled first color of light Reference color coordinate compare with normal brightness, and the light source control is controlled when the two that any one compares is unequal Portion 636 adjusts the driving current of the first light source 612 and the driving current of the second light source 614, so that the light valve The first color in predetermined image that the 62 modulation image light projected or the projection lens 64 and projection screen 65 are shown The actual color coordinate and intrinsic brilliance of light are consistent with the reference color coordinate of first color of light and normal brightness respectively.

Specifically, as shown in Figures 3 and 4, the Wavelength converter 620 the first period T1 project the first color of light with Second color of light then projects third color of light in the second period T2, and projects the 4th color of light in third period T3.The light Valve receives the first color of light that the light emitting device 600 issues and the second color of light in the first period T1 and makes a reservation for figure according to first As data carry out image modulation to be emitted the first modulation image light, then the light valve the second period T2 receive it is described shine The third color of light and the second predetermined image data of foundation that device 600 issues carry out image modulation to be emitted the second modulation image light Line and the light valve receive the 4th color of light that the light emitting device 600 issues in third period T3 and make a reservation for figure according to third As data carry out image modulation to be emitted third modulation image light.The projection lens 64 receives described first, second and Three modulation image light are to show predetermined image on the projection screen 65.

It is appreciated that the first predetermined image data, the second predetermined image data, third predetermined image data can be Test image data, the test image data can be the corresponding image data of solid color image, such as red test image Data, green test image data or blue test image data, the corresponding predetermined image can for red test image, Green test image or blue test image.

The reference color coordinate and normal brightness of scheduled first color of light can be pre-stored in a storage unit, The regulating device 634 can transfer the reference color coordinate and standard of scheduled first color of light from the storage unit Brightness is to be compared.The reference color coordinate and normal brightness of scheduled first color of light can be under an original state (before the fluorescent material aging of such as described Wavelength converter, before specifically can be set to optical projection system factory) described light valve 62 projects Modulation image light or the first color of light in the predetermined image that shows of the projection lens 64 and projection screen 65 mark Quasi- chromaticity coordinates and normal brightness.

Further, the detection device 632 can be the detection devices such as spectrometer.But implement in a kind of change In mode, the optical projection system 60 can not also include the detection device 632, that is to say, peripherals detector can be passed through In the predetermined image that the modulation image light or the projection lens 64 and projection screen 65 project to the light valve 62 is shown The first color of light actual color coordinate and one or both of intrinsic brilliance detected, but the optical projection system 60 can To include input unit, the first color of light, the third that can be detected the peripherals detector by the input unit Color of light and the 4th color of light are provided to the regulating device 634, are walked so that the regulating device 634 is compared and adjusts etc. Suddenly.

Additionally, it is appreciated that in change embodiment, the first light source 612 of the light emitting device 600, second light source 614, the positions such as Wavelength converter 620 and light path design can be with reference to the hairs of second, third and the 4th embodiment of the application Each position of components and light path design in electro-optical device 100.

Compared to the prior art, driving current and institute of the optical projection system 60 of the present invention by the adjusting first light source 612 The driving current of second light source 614 is stated so that the first color of light in the modulation image light or the predetermined image One or both of actual color coordinate and intrinsic brilliance and one or both of the reference color coordinate and normal brightness one It causes, the bad phenomenon of white balance caused by colour cast or luminance shortage can be effectively improved, improve Projection Display effect.Especially pair Attract in the light emitting device 600 and projection for carrying out light filling using the second light source 614, the setting of the second light source 614 can The phenomenon that reducing poor display effect caused by certain color of light accounting deficiency.

It is understood that those skilled in the art can also do other variations etc. used in of the invention in spirit of that invention Design, without departing from technical effect of the invention.These variations that spirit is done according to the present invention, should all be included in Within scope of the present invention.

Claims

1. a kind of light emitting device, which is characterized in that the light emitting device includes:

First light source；

Wavelength converter comprising at least the first sectional area, first sectional area carry the first color fluorescence material With the mixture of the second color fluorescence material, the first color fluorescence material is excited by the light of the first light source and generates the One color of light, the second color fluorescence material are excited by the light of the first light source and generate the second color of light, and described second Color of light can isolate the first color of light and another color of light；

Second light source, for emitting the first color of light, the first color of light of the second light source transmitting is used to turn with the wavelength The first color of light that changing device generates carries out light combination and constitutes the first color of light that the light emitting device issues, the wavelength convert The first color of light that device generates includes the first color of light and second color that the first color fluorescence material generates The first color of light in the second color of light that fluorescent material generates；

Regulating device, one in actual color coordinate and intrinsic brilliance for obtaining the first color of light that the light emitting device issues Kind or two kinds, and one or both of the actual color coordinate of first color of light that will acquire and intrinsic brilliance with it is scheduled One or both of the reference color coordinate of first color of light and normal brightness compare；And

Light source control portion, for adjusting the driving current and described second of the first light source when the two to compare is unequal The driving current of light source so that the light emitting device issue the first color of light actual color coordinate and intrinsic brilliance with it is described The reference color coordinate of first color of light is consistent with normal brightness.

2. light emitting device according to claim 1, which is characterized in that the light emitting device further includes detection device, described Detection device be used to detect one of actual color coordinate and intrinsic brilliance of the first color of light that the light emitting device issues or Two kinds, and the actual color coordinate for the first color of light that will test and intrinsic brilliance are supplied to the regulating device.

3. light emitting device according to claim 1, which is characterized in that described when described the two to compare is unequal The brightness for the first color of light that the driving current that light source control portion adjusts first light source generates Wavelength converter is Y1 ', If the chromaticity coordinates for the first color of light that Wavelength converter generates at this time is (x1 ', y1 '), and the regulating device also controls institute State light source control portion adjust the second light source driving current make second light source transmitting the first color of light brightness For Y2 '；

Above-mentioned each parameter Y1 ', Y2 ', x1 ', y1 ' meet following formula:

Y1+Y2=Y1 '+Y2 '；

(Y1×x1/y1+Y2×x2/y2)/(Y1/y1+Y2/y2)

=(Y1 ' × x1 '/y1 '+Y2 ' × x2/y2)/(Y1 '/y1+Y2 '/y2)；

(Y1+Y2)/(Y1/y1+Y2/y2)=(Y1 '+Y2 ')/(Y1 '/y1+Y2 '/y2)；

Wherein: the first color of light that the light emitting device issues under an original state reaches the reference color coordinate and the standard When brightness, the brightness for the first color of light that the Wavelength converter generates is expressed as Y1, chromaticity coordinates is expressed as (x1, y1), institute The brightness for stating the first color of light of second light source transmitting is expressed as Y2, chromaticity coordinates is expressed as (x2, y2).

4. light emitting device according to claim 3, which is characterized in that the original state be the first color fluorescence material and The state of aging does not occur for the second color fluorescence material.

5. light emitting device according to claim 1, which is characterized in that the Wavelength converter further includes the second segment identifier Domain, second sectional area carry third color fluorescence material, and the third color fluorescence material is by the first light source Light excites and generates third color of light；

The regulating device is also used to obtain the intrinsic brilliance for the third color of light that second sectional area issues, and will acquire Third color of light the intrinsic brilliance compared with the normal brightness of scheduled third color of light, the light source control portion The driving current of the first light source is adjusted when the two to compare is unequal, so that second sectional area issued The intrinsic brilliance of third color of light is consistent with the normal brightness of the third color of light.

6. light emitting device according to claim 5, which is characterized in that the first color fluorescence material is red fluorescence material Material, the second color fluorescence material are yellow fluorescent material, and the third color fluorescence material is green fluorescent material, described First color of light is red light, and second color of light is sodium yellow, and the third color of light is green light, second color Light can isolate red light and green light.

7. light emitting device according to claim 1, which is characterized in that the Wavelength converter further includes third segment identifier Domain, the first light source issue the 4th color of light, and the third sectional area carries out the 4th color of light of the first light source Transmission scatters and projects the 4th color of light；The regulating device is also used to obtain the 4th face that the third sectional area issues The intrinsic brilliance of coloured light, and the normal brightness of the intrinsic brilliance of the 4th color of light and scheduled 4th color of light that will acquire It comparing, the light source control portion adjusts the driving current of the first light source when the two to compare is unequal, so that The intrinsic brilliance for the 4th color of light that the third sectional area issues is consistent with the normal brightness of the 4th color of light.

8. light emitting device according to claim 1, which is characterized in that the Wavelength converter further includes third segment identifier Domain, the third sectional area carry the 4th color fluorescence material, and the first light source issues ultraviolet light, and the 4th color is glimmering Luminescent material is excited by the light of the first light source and generates the 4th color of light；The regulating device is also used to obtain the third point In the intrinsic brilliance for the 4th color of light that section region issues, and with scheduled the in the intrinsic brilliance of the 4th color of light that will acquire The normal brightness of four color of light compares, and the light source control portion adjusts the first light source when the two to compare is unequal Driving current so that the intrinsic brilliance and the 4th color of light of the 4th color of light that the third sectional area issues Normal brightness is consistent.

9. light emitting device according to claim 7 or 8, which is characterized in that the 4th color of light is blue light.

10. a kind of optical projection system comprising light emitting device, it is characterised in that: the light emitting device is appointed using claim 1-9 Optical projection system described in meaning one.

11. a kind of optical projection system comprising:

Light emitting device, comprising:

First light source；

Light valve, for receive the first color of light and the second color of light that the light emitting device issues and according to predetermined image data into Row image modulation is to be emitted modulation image light；

Projection lens receives the modulation image light to show predetermined image；

Regulating device, the practical color for obtaining the first color of light in the modulation image light or the predetermined image are sat Mark and one or both of intrinsic brilliance, and the light valve that will acquire issue or in the predetermined image described the The reference color coordinate of one or both of actual color coordinate and intrinsic brilliance of one color of light and scheduled first color of light and One or both of normal brightness compares；And

Light source control portion is used to adjust the driving current and described second of the first light source when the two to compare is unequal The driving current of light source so that the light emitting device issue the first color of light actual color coordinate and intrinsic brilliance with it is described The reference color coordinate of first color of light is consistent with normal brightness.