CN101562227B - Light emitting device and method of manufacturing the same - Google Patents
Light emitting device and method of manufacturing the same Download PDFInfo
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- CN101562227B CN101562227B CN2009101417389A CN200910141738A CN101562227B CN 101562227 B CN101562227 B CN 101562227B CN 2009101417389 A CN2009101417389 A CN 2009101417389A CN 200910141738 A CN200910141738 A CN 200910141738A CN 101562227 B CN101562227 B CN 101562227B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Abstract
The present invention provides a light emitting device and a method of manufacturing the same. The light-emitting device (10) includes a light-emitting element (11) for emitting primary light, and a wavelength conversion unit (12) for absorbing part of the primary light and emitting secondary light having a wavelength longer than that of the primary light, wherein the wavelength conversion unit includes plural kinds of phosphors (13, 14, 15) having light absorption characteristics different from each other, and then at least one kind of phosphor among the plural kinds of phosphors has an absorption characteristic that can absorb the secondary light emitted from at least another kind of phosphor among the plural kinds of phosphors.
Description
The application is to be that May 30, application number in 2006 are 200610087861.3 and denomination of invention dividing an application for the application of " luminescent device and manufacture method thereof " applying date.
This non-provisional application is based on Japanese patent application 2005-157056,2005-202851 and 2006-059689 respectively on May 30th, 2005, on July 12nd, 2005 and submission on March 6th, 2006 Japan Patent office, and their full content is combined in this by reference.
Technical field
The present invention relates to the improvement of a kind of luminescent device or the device that emits white light, described device comprises that the semiconductor light-emitting elements that is used for luminous once light is used to absorb once light with comprising, and launches the wavelength conversion unit of the phosphor of secondary light then.
Background technology
Comprise the luminescent device of semiconductor light-emitting elements and wavelength conversion unit or the device that emits white light realizes that as expectation the second generation luminescent device or the device that emits white light of the colorrendering quality of low energy consumption, miniaturization, high brightness and wide region have caused concern, carry out forcefully to its research and development.
GaN-base light light-emitting component, ZnO-base light light-emitting component etc. is used as the optical semiconductor light-emitting component.Wavelength is used as from the once light of light-emitting component emission at the light in from ultraviolet longer wavelength to blue (that is, about 380nm is to about 480nm) scope.Proposed to use various being fit to the wavelength conversion unit of a phototransformation as the phosphor of secondary light.
An example with luminescent device of this wavelength Conversion function is disclosed among the open No.2004-071357 of Japan Patent.This document is described the use as the InN-base nanometer crystal body of phosphor, but does not provide the detailed explanation of its luminescent properties.The open No.2004-179644 of Japan Patent discloses a kind of luminescent device of considering the light scattering efficiency of every layer on cascade phosphor layer, and described every layer comprises the light scattering agent that is added in the resin.Equally, in this document, there is not the luminescent properties of phosphor layer to explain in detail.
Simultaneously, in the application of device that emits white light, it is as being most important in the LCD (LCD) (particularly at LCD TV (TV) machine) or the application of the device that emits white light that is used for the photoflash lamp of camera.The device that need emit white light has high luminous efficiency, has good colorrendering quality simultaneously.Particularly, the device that preferably emits white light can obtain to be similar to the white light of colourless black body radiation.
The open Nos.2004-071357 of Japan Patent and 2004-179644 do not provide detailed explanation and do not provide technology for the effect of the relative order of presentation of multiple phosphor about the luminescent properties of the multiple phosphor that comprises in the luminescent device and consider.
Consider in the operating period of luminescent device and prevent to worsen the resin bed that comprises phosphor by ultraviolet, using peak wavelength is under the situation corresponding to the light-emitting component in 400nm to the 500nm scope of blue light wavelength scope, the exciting characteristic that is suitable in the visible-range of (that is, wherein comprising in the multiple phosphor) in the wavelength conversion unit of an optical wavelength has crucial meaning.
In other words, bring into play to the luminescent device at utmost, importantly consider the excitating performance of respective phosphors, the best layer-by-layer state of configuration phosphor for the performance of the wavelength conversion unit that will comprise multiple phosphor.
On the other hand, in order to improve the colorrendering quality of the device that emits white light, it is desirable to use the light source that shows high spectral purity for every kind of color of red, green and blue three primary colors.What can expect is the light source that LED (light-emitting diode) or semiconductor laser for example is used for every kind of color.But, can not obtain having the semiconductor light sources of good green luminescence efficient.In addition, the brightness of every kind of semiconductor light sources needs control independently of each other, and this needs large-scale drive circuit.
Realize the method for white light source as for using a kind of semiconductor light sources, the open No.10-242513 of Japan Patent discloses and has a kind ofly used blue led and by the method for combination blue-light excited and that launch the phosphor of gold-tinted.But by this method, the problem of existence is that colorrendering quality is poor, and reason is that except the red component deficiency green spectral purity is low.
Similarly, the whole bag of tricks has been proposed, in every kind of method, the combination of phosphors of blueness, green or the ruddiness of the once light that the LED of the light in will being used to be transmitted in from relative longer wavelength ultraviolet to blue scope (that is, from 380nm to 480nm) and transmitting response are launched by LED.For example, the open No.2004-327492 of Japan Patent discloses a kind of method of using the phosphor that only is used for green glow in order to improve green emitting efficient.But disclosed this method also needs large-scale drive circuit in this document, because it uses multiple semiconductor light-emitting elements.
The open No.2002-171000 of Japan Patent discloses the method for multiple phosphor of blueness, green and the ruddiness of the once light that the LED that will be used to launch ultraviolet and transmitting response launched by LED.But this document is to the best of breed of LED and multiple phosphor, particularly can be used as the combination that black body radiation reaches high-luminous-efficiency and good color reproduction in simultaneously on a large scale to preparation and provide suggestion.Particularly, by disclosed phosphor in the open No.2002-171000 of Japan Patent, particularly not enough in the phosphor luminous efficiency that is used for red-emitting.
Now, the device that emits white light mainly comprises the light-emitting component that is used to launch blue light, its with by blue-light excited, launch then gold-tinted the trivalent cerium activation (Y, Gd)
3(Al, Ga)
5O
12Phosphor or divalent europium activation (Sr, Ba, Ca)
2SiO
4Combination of phosphors.
But this device that emits white light is not suitable for use in the backlight of large LCD (being used in particular for LCD-TV), because its colorrendering quality (NTSC ratio) is low, is lower than 50%.Promptly, though having the advantage of the device that emits white light of the combination of semiconductor light-emitting elements and phosphor is, it does not comprise mercury, and compare with the cold-cathode fluorescence lamp of main use at present, can reach low energy consumption, miniaturization and high brightness, but be badly in need of improving its colorrendering quality (NTSC ratio).
Herein, the NTSC ratio is the standardization with respect to leg-of-mutton area, described triangle is in the XYZ look system chromatic diagram by National Television System Committee (NTSC) definition, by connecting redness (0.670,0.330), green (0.210,0.710) and the chromaticity coordinate of blue (0.140,0.080) (x y) forms.
The open disclosed prior art of No.2003-121838 of Japan Patent concentrates on the colorrendering quality (NTSC ratio) among the LCD.This document has been described the spectrum peak of back light in the scope of 505nm to 535nm; The activator of the phosphor that is used for transmitting green light that uses in light source comprises europium, tungsten, tin, antimony or manganese; And described MgGa
2O
4: Mn and Zn
2SiO
4: Mn is used as the phosphor that is used for transmitting green light in embodiments.But, under the situation in the scope of peak wavelength at 380nm to 450nm of light-emitting component, can not think and can suitably use the every kind of phosphor that contains europium, tungsten, tin, antimony or manganese.More specifically, the MgGa that mentions in the embodiment of the open No.2003-121838 of Japan Patent
2O
4: Mn and Zn
2SiO
4: the low-down luminous efficiency of the exciting light in each free 380nm to 450nm scope of Mn, so these phosphors are not suitable for the present invention.
In addition, the open No.2004-287323 of Japan Patent describes not only can be with RGB (the red, green and blue)-LED that comprises respectively in shell, have the led chip that is used to launch red, green and blue light, and can will have trichroism fluorescent tube, ultraviolet LED+RGB phosphor, organic EL light source etc., as backlight.But, in this document, do not have specific descriptions about the RGB phosphor in ultraviolet LED+RGB phosphor.
Summary of the invention
Consider the above-mentioned condition of prior art, an object of the present invention is to provide a kind of luminescent device, it comprises comprising and is used for the wavelength conversion unit of radiative multiple phosphor expeditiously, wavelength conversion unit response is the light of 380nm to 450nm by the wavelength of semiconductor light-emitting elements emission, wherein can easily be provided with from the light color of device emission and reaches high brightness.Another object of the present invention provides the have excellent colorrendering quality device that emits white light of (NTSC ratio).
Luminescent device according to an aspect of the present invention comprises: the light-emitting component that is used to launch once light; Be used for once light of absorption portion, emission wavelength is than the longer wavelength conversion unit of light wavelength then; Wherein said wavelength conversion unit comprises the multiple phosphor that mutual absorption characteristic is different, and at least a phosphor in multiple phosphor has the absorption characteristic that can absorb by the secondary light of the another kind of at least phosphor emission in the multiple phosphor.Adopt this luminescent device, can easily be provided with from the color of the light of device emission, and reach high brightness.
Preferably will launching being used in multiple phosphor relatively more, the phosphor of long wavelength's light is placed in from the near more place of light-emitting component.Adopt this structure, not by be used to launch other colourama and situation that other phosphor that be placed in the outside absorbs once more under, can guide every kind of colourama the outside of device into effectively to the luminescent device emitted outside from multiple phosphor.In addition, inwardly the light of emission helps to excite the emission light that is used for longer wavelength and is positioned in inner phosphor.Therefore, as a whole emission loss in luminescent device can be restricted to minimum level.
Can use gallium nitride-based semiconductor to prepare the light-emitting component that uses among the present invention.
Be used for phosphor that the present invention is used for launching blue light can comprise be selected from following at least a: by (M1, Eu)
10(PO
4)
6Cl
2The halophosphate phosphor of the divalent europium activation of expression is by a (M2, Eu) ObAl
2O
3The aluminate phosphorus of the divalent europium activation of expression and by a (M2, Eu
c, Mn
d) ObAl
2O
3The aluminate phosphorus of the divalent europium-manganese co-activating of expression, wherein, M1 represents to be selected from least a element among Mg, Ca, Sr and the Ba; M2 represents to be selected from least a element among Mg, Ca, Sr, Ba and the Zn; And a, b, c and d represent to satisfy a＞0, the number of b＞0,0.1≤a/b≤1.0 and 0.001≤d/c≤0.2.
Be used for phosphor that the present invention is used for transmitting green light can comprise be selected from following at least a: by a (M2, Eu
e, Mn
f) ObAl
2O
3The aluminate phosphorus of the divalent europium-manganese co-activating of expression is by 2 (M
1-g, Eu
g) OSiO
2The silicate phosphors of the divalent europium activation of expression and by MI
3(MII
1-h, Ce
h)
2(SiO
4)
3The silicate phosphors of the trivalent cerium activation of expression, wherein, M2 represents to be selected from least a element among Mg, Ca, Sr, Ba and the Zn; A, b, e and f represent to satisfy the number of a＞0, b＞0,0.1≤a/b≤1.0 and 0.3≤f/e≤5.0; M1 represents to be selected from least a element among Mg, Ca, Sr and the Ba; G represents the number of 0.005≤g≤0.10; MI represents to be selected from least a element among Mg, Ca, Sr and the Ba; MII represents to be selected from least a element among Al, Ga, In, Sc, Y, La, Gd and the Lu; And h represents to satisfy the number of 0.005≤h≤0.5.
Being used for the phosphor that the present invention is used for red-emitting can comprise by (MIII
1-j, Eu
j) MIVSiN
3The nitride phosphor of the divalent europium activation of expression, wherein MIII represents to be selected from least a element among Mg, Ca, Sr and the Ba; MIV represents to be selected from least a element among Al, Ga, In, Sc, Y, La, Gd and the Lu; And j represents the number of 0.001≤j≤0.05.
Luminescent device according to another aspect of the present invention comprises: light-emitting component is used to launch once light; And wavelength conversion unit, be used to absorb described once light to small part and emission wavelength than the longer secondary light of light wavelength; Wherein said wavelength conversion unit comprises phosphor that is used for transmitting green light and the phosphor that is used for red-emitting at least, and the described phosphor that is used for transmitting green light comprises (M2, Eu by a
e, Mn
f) ObAl
2O
3The aluminate phosphorus of the divalent europium-manganese co-activating of expression, wherein, M2 represents to be selected from least a element among Mg, Ca, Sr, Ba and the Zn; And a, b, e and f represent to satisfy a＞0, the number of b＞0,0.1≤a/b≤1.0 and 0.3≤f/e≤5.0.
In this luminescent device, the emission spectrum of phosphor that is used for green glow is narrow, so use a kind of semiconductor light-emitting elements can obtain good colorrendering quality.More specifically, the Eu that plays activating agent effectively absorbs once light, but itself is difficult to launch light.Give Mn with the energy delivery that absorbs, produce the emission of green glow then as Mn.Since narrow from the luminescent spectrum of Mn, the narrow green of spectral width obtained expeditiously.
In addition, under the situation in the basic crystal that Sr is added to phosphor, can also with have in addition relatively more long wavelength's once light as exciting light.Therefore this casting resin that can prevent to comprise phosphor can prolong the life-span of luminescent device owing to the irradiation of short wavelength's light worsens.
Preferably, the phosphor that is used for ruddiness comprises by (M3
1-gEu
g) M4SiN
3The nitride phosphor of the divalent europium activation of expression, wherein M3 represents to be selected from least a element among Mg, Ca, Sr and the Ba; M4 represents to be selected from least a element among Al, Ga, In, Sc, Y, La, Gd and the Lu; And g represents to satisfy the number of 0.001≤g≤0.05.By this phosphor that is used for red-emitting, can obtain the narrow ruddiness of spectral width expeditiously.
Wavelength conversion unit can also comprise the phosphor that is used to launch blue light, the described phosphor that is used for launching blue light comprise be selected from following at least a: by (M1, Eu)
10(PO
4)
6Cl
2The halophosphate phosphor of the divalent europium activation of expression is by a (M2, Eu) ObAl
2O
3The aluminate phosphorus of the divalent europium activation of expression and by a (M2, Eu
c, Mn
d) ObAl
2O
3The aluminate phosphorus of the divalent europium-manganese co-activating of expression, wherein, M1 represents to be selected from least a element among Mg, Ca, Sr and the Ba; M2 represents to be selected from least a element among Mg, Ca, Sr, Ba and the Zn; And a, b, c and d represent to satisfy a＞0, the number of b＞0,0.1≤a/b≤1.0 and 0.001≤d/c≤0.2.By this phosphor that is used to launch blue light, can obtain the narrow blue light of spectral width expeditiously.
Preferably, light-emitting component is to be formed by gallium nitride-based semiconductor, and once the peak wavelength of light in the scope of 380nm to 450nm.More preferably once the peak wavelength of light in the scope of 390nm to 420nm.This semiconductor light-emitting elements can excite effectively and be used to launch indigo plant, green and three kinds of phosphors that ruddiness is used.
The wavelength components of the secondary light that can launch to light wavelength composition launching from light-emitting component with from the every kind of phosphor that is used for ruddiness, green glow and blue light is regulated, and makes the light of launching from described luminescent device have the colourity of the black body radiation that is considered to predetermined colour temperature.By this adjusting, luminescent device can be launched nature (white) light, thus can be with its light source as the good illumination quality.
Preferred light-emitting component is coated with many resin beds, described resin bed comprises the phosphor that is used for red-emitting for every layer, be used for the phosphor of transmitting green light and be used for phosphor a kind of of red-emitting, and the phosphor that comprises in the nearer resin bed of described light-emitting component is compared with the phosphor that comprises in the farther resin bed of light-emitting component, and emission has the secondary light of longer peak wavelength.Adopt this arrangement, prevent that the light of the phosphor emission from the resin bed of settling from light-emitting component from being absorbed by the phosphor in the resin bed of settling from the light-emitting component farther place more nearby, can obtain the high efficiency device that emits white light thus.Can also be on basis with respect to the result of the luminous efficiency of the thickness measure that comprises single each resin bed of planting phosphor, the design device that emits white light.
Preferably, with the multi-layer resinous layer casting light-emitting component that is stacked in from level to level on another layer, so that every layer has predetermined thickness.The manufacturing of this device that can help emitting white light.
Can be by a kind of method manufacturing that comprises following step according to luminescent device of the present invention: light-emitting component is installed in the shell on the bottom that the reflecting surface by inwall surrounds; Introduce and harden and mediate first liquid resin that first kind of phosphor arranged, to cover the described light-emitting component of installing in the described shell; Introduce and be hardened in sclerosis thus with second liquid resin that kneading is had second kind of phosphor and on described first liquid resin on the described reflecting surface, wherein the secondary light wavelength of the described first kind of phosphor of secondary light wavelength ratio of second kind of phosphor is shorter.
In addition, can comprise the method manufacturing of following step by another kind according to luminescent device of the present invention: light-emitting component is installed in the shell on the bottom that the reflecting surface by inwall surrounds; Introduce the liquid resin of mediating the multiple phosphor that the different-grain diameter intermediate value is arranged, to cover the described light-emitting component of installing in the described shell; With with the static placement preset time of liquid resin of described introducing so that the phosphor particles sedimentation, make in the big more specific phosphors of median particle size big more in concentration near the place of described light-emitting component.
Above and other objects of the present invention, feature, aspect and advantage will become clearer from the detailed description of the present invention during below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the signal vertical cross section of demonstration according to the structure of the luminescent device of one embodiment of the invention.
Fig. 2 is the curve chart that shows the spectral distribution that excites and launch of the phosphor that is used for red-emitting.
Fig. 3 is the curve chart that shows the spectral distribution that excites and launch of the phosphor that is used for transmitting green light.
Fig. 4 is the curve chart that shows the spectral distribution that excites and launch of the phosphor be used to launch blue light.
Fig. 5 shows the curve chart that distributes according to luminescent spectrum in the luminescent device of one embodiment of the invention.
Fig. 6 is the curve chart that shows the spectral characteristic of the colour filter of using the luminescent device Performance Evaluation.
What Fig. 7 showed is the constructed profile that illustrates the manufacture method of luminescent device according to another embodiment of the invention.
Fig. 8 shows the xy chromatic diagram that concerns between the temperature of black body radiation and the chromaticity coordinate.
Fig. 9 is the signal vertical cross section that shows the structure of the luminescent device of another embodiment according to the present invention.
Embodiment
In Fig. 1, at the luminescent device of signal vertical cross section illustrated according to the embodiment of the invention 1.This luminescent device 10 comprises the light-emitting component 11 that is used to launch once light and absorbs to the small part wavelength conversion unit 12 of light and the emission wavelength secondary light longer than light wavelength once.Light-emitting component 11 is placed on the cathode terminal 18, and it is electrically connected with anode terminal 17 and cathode terminal 18 by spun gold 19.
As for light-emitting component 11, for example can using, emission peak wavelength is gallium nitride (GaN)-based light-emitting diode of 410nm.
Wavelength conversion unit 12 comprises: comprise (the Ca that consists of that is used for red-emitting
0.98Eu
0.02) AlSiN
3Phosphor the layer 13, comprise (the Ba that consists of that is used for transmitting green light
0.85Eu
0.15) (Ba
0.80Eu
0.20) Al
10O
17Phosphor layer 14 and comprise (the Ba that consists of that is used to launch blue light
0.80Eu
0.20) MgAl
10O
17Phosphor the layer 15.
Fig. 2 shows the spectral distribution that excites and launch of the phosphor that is used for red-emitting among the embodiment 1; Fig. 3 shows the spectral distribution that excites and launch of the phosphor that is used for transmitting green light; Show the spectral distribution that excites and launch of the phosphor that is used to launch blue light with Fig. 4.Particularly, in every shown in Fig. 2 to 4 curve chart, trunnion axis is represented light wavelength (nm), and vertical axis is represented the relative intensity of light.In addition, the spectral distribution that curve 31,33 in these curve charts and 35 expression phosphors excite, and curve 32,34 and 36 is represented from the spectral distribution of phosphor emission.
Find out that from Fig. 2-4 every kind of phosphor among the embodiment 1 very effectively transmitting response peak wavelength is red, the green or blue light of the once light of 410nm.
In addition, recognize: be used for red-emitting phosphor can by in addition absorb respectively from the green glow (the about 520nm of wavelength) of the phosphor emission that is used for transmitting green light and blue light and blue light (the about 450nm of wavelength) and red-emitting.
But, by being unhelpful, because it will reduce wavelength conversion efficiency on the whole by exciting the phosphor that is used for red-emitting as the green glow of launching by the secondary light of light activated phosphor once (about 520nm wavelength) and blue light (about 450nm wavelength).
More specifically, in order to obtain high brightness light-emitting devices,, the importantly stacked in this order phosphor layer 13 that is used for ruddiness, be used for the phosphor layer 14 of green glow and be used for the phosphor layer 15 of blue light as in this embodiment 1.Should be noted in the discussion above that phosphor that can be mixed for green glow and the phosphor that is used for blue light, to form single luminescent layer, can not be because be used for the phosphor of green glow by blue-light excited with transmitting green light.
In embodiment 1, to be used for the phosphor of ruddiness, (siloxy group or epoxy radicals) adhesive resin is gone in the every kind of kneading that is used for the phosphor of green glow and is used for the phosphor of blue light, with its cup 16, make their sclerosis form phosphor stratiform structure 12 then then with the device outer case shown in order introducing Fig. 1 of red light emitting layer 13, green light emitting layer 14 and blue light-emitting layer 15.
On the inwall of cup 16, platform 16a is provided, climb along the inwall of cup by surface tension with the resin that prevents to mediate phosphor and be introduced into cup, can obtain uniform thickness for every layer of luminescent layer thus.In addition, preferably, by the border that platform 16a forms, the top of inwall that makes this cup is than the more precipitous crustal inclination in bottom.This can reduce the shade of platform 16a, and described shade is to produce in the superincumbent phosphor layer of light by the emission of following phosphor layer.
As for comparative example 1, will with the phosphor of identical kind among the embodiment 1 to be used for the phosphor of blue light: the phosphor that is used for green glow: the mass ratio that is used for the phosphor of ruddiness=2.0: 1.5: 1.0 mixes, to form the single luminescent layer as wavelength conversion unit.
Table 1 shows from the assessment result of the white light of the luminescent device emission of embodiment 1 and comparative example 1.
Table 1
| Brightness (relative value) | Tc- | |
| Embodiment | ||
| 1 | 100％ | 7000K+0.001 |
| Comparative example 1 | 70％ | 7000K+0.001 |
As seen from Table 1, though the light of the emission of the luminescent device in embodiment 1 and the comparative example 1 same color,, to compare with comparative example 1, the brightness of the luminescent device of embodiment 1 has significant improvement.
Here, the correlated colour temperature of the light that " Tc " expression is launched from luminescent device, and the radiative chroma point of " duv " expression from the deviation of black body radiation track (promptly, on U*V*W chromatic diagram (the even color space of CIE1964), the length of normal degree of drawing down to the black body radiation track from radiative chroma point).Usually consider that it is nature (white) light that duv is lower than 0.01 light perception, this light is similar to the light of emission from common tungsten filament bulb etc.Black body radiation temperature by 7000K obtains the nature white light, because it is near the colour temperature of the sun.
In each of embodiment 1 and comparative example 1, though the peak wavelength of the once light of launching from light-emitting component is 410nm, this wavelength is being in the effective wave-length coverage for excitation phosphor, but its luminance efficiency is low, even therefore when it leaks into the outside, also be helpless to the brightness of luminescent device.Therefore, preferably be used in laminate 12a on the outmost surface of phosphor layer structure 12, described 12a is coated with the optical thin film (for example, multi-coated interference film) with the performance that only reflects once light.Once light by this sheet 12a reflection can help exciting of phosphor layer again, thus on the whole can be from the brighter light of luminescent device emission.
In embodiments of the invention 2, be that gallium nitride (GaN) based light-emitting diode of 460nm is as light-emitting component with peak wavelength.
As for wavelength conversion unit, use be by (Sr
0.75Ba
0.24Eu
0.01)
2SiO
4Form the phosphor that is used for green glow of expression and by (Ca
0.985Eu
0.015) AlSiN
3The phosphor that is used for ruddiness of forming expression.Find that from Fig. 2 the phosphor that is used for ruddiness can absorb from the green glow (the about 550nm of wavelength) of the phosphor emission that is used for green glow, then can red-emitting.
Use light-emitting diode and described phosphor, with embodiment 1 same way as, make the luminescent device among the embodiment 2.As for comparative example 2, make luminescent device with the wavelength conversion unit that forms by the single-shot photosphere, described single-shot photosphere is to make by the phosphor of identical kind among mixing and the embodiment 2.
The performance of the luminescent device in assessment embodiment 2 and the comparative example 2, it the results are shown in the table 2.
Table 2
| Brightness (relative value) | Tc- | |
| Embodiment | ||
| 2 | 100％ | 6000K-0.001 |
| Comparative example 2 | 75％ | 6000K-0.001 |
As seen from Table 2, though the color of the light of the emission of the luminescent device among the embodiment 2 is identical with the color of the light of the luminescent device emission of comparative example 2,, the brightness of light significantly improves.
Embodiment 3-8
Making luminescent device among embodiment 3-8 and the comparative example 3-8 with embodiment 1 and comparative example 1 similar fashion, difference is, changes the kind of the phosphor of the emission peak wavelength of light-emitting component and use.The assessment result of their performances is shown in Table 3.
As seen from Table 3, the luminescent device of embodiments of the invention 3-8 is compared aspect the brightness with comparative example 3-8 respectively and is significantly improved.
Embodiment 9
For the device that emits white light according to the embodiment of the invention 9, can also be referring to Fig. 1.The device 10 that emits white light of embodiment 9 comprises the light-emitting component 11 that is used to launch once light and absorbs to the small part wavelength conversion unit 12 of light and the emission wavelength secondary light longer than light wavelength once.As for light-emitting component 11, can use gallium nitride (GaN) based light-emitting diode of peak wavelength as 410nm.
As for wavelength conversion unit 12, contain by (Ca with this order pantostrat stacked package
0.98Eu
0.02) AlSiN
3Form the phosphor that is used for ruddiness of expression resin bed 13, comprise by (Ba
0.85Eu
0.15) (Mg
0.80Mn
0.20) Al
10O
17Form expression the phosphor that is used for green glow resin bed 14 and comprise by (Ba
0.80Eu
0.20) MgAl
10O
17Form the resin bed 15 of the phosphor that is used for blue light of expression, wherein comprise three kinds of phosphors at 1: 1: 1 with quality ratio.
Fig. 5 is the curve chart that the emission spectrum of the device that emits white light of demonstration embodiment 9 distributes.Particularly, in this curve chart, trunnion axis is represented emission wavelength (nm), and vertical axis is represented the radiation intensity (a.u.: arbitrary unit) of light.In this curve chart, find to have narrow spectral width corresponding to the light of penetrating from Mn from the light of the phosphor that is used to launch green glow (the about 520nm of peak wavelength) as secondary light.
In the device that emits white light of embodiment 9, assessment brightness and colorrendering quality (NTSC ratio).Fig. 6 shows the spectral characteristic of the blueness that is used to measure colorrendering quality, green and red colour filter.In this curve chart, trunnion axis is represented light wavelength (nm), and vertical axis represents to transmit the amount (a.u.) of light.In addition, the curve in this curve chart 37,38 and 39 is represented the characteristic of blue color filter, green color filter and red color filter respectively.
In order to compare, make the luminescent device of comparative example 9 with embodiment 9.The luminescent device difference of the luminescent device of comparative example 9 and embodiment 9 only is single resin bed is used for wavelength conversion unit, and described wavelength conversion unit comprises: with 1.5: 1.0 mass ratioes mix by (Ba
0.80Eu
0.20) MgAl
10O
17Form the phosphor that is used for blue light of expression and by (Sr
0.92Ba
0.05Ca
0.01Eu
0.02)
2ISO
4The phosphor that is used for gold-tinted of forming expression.
Table 4 shows the assessment result by the white light of the luminescent device emission of embodiment 9 and comparative example 9.
Table 4
| Brightness (relative value) | Tc-duc | Colorrendering quality (NTSC ratio) | |
| Embodiment 9 | 100.0％ | 6600K+0.007 | 85.0％ |
| Comparative example 9 | 97.3％ | 6600K+0.007 | 48.1％ |
As seen from Table 4, compare the not only brightness but also significantly improve of the luminescent device of embodiment 9 at colorrendering quality (NTSC ratio) with comparative example 9.
In table 4, the black body radiation temperature is the 6600K near solar temperature, shows to obtain the nature white light.
For the purpose of reference, the xy chromatic diagram of Fig. 8 shows the relation between black body radiation temperature and the xy chromaticity coordinate.In chromatic diagram, a plurality of circular expression spectrum locuss, and a plurality of triangle is represented the black body radiation track.
More specifically following manufacturing can be referring to the luminescent device of the embodiment 9 of Fig. 1.GaN-base light-emitting component 11 is installed on one of pair of lead wires frame (foil) 17,18, and is electrically connected with lead frame 17,18 by couple of conductor 19.
By using visible light is had the white resin of high reflectance, around light-emitting component 11, form bowl-type cup 16.On the inwall of bowl-type cup, provide platform 16a with the stable level that comprises the liquid resin of phosphor.As a result, comprise phosphor resin bed 13,14 and 15 every layer can roughly have predetermined uniform thickness.
According to this order, one after the other be useful on the resin bed 15 casting light-emitting components 11 of the phosphor of secondary blue light with the resin bed 13 that adds the phosphor that is useful on secondary ruddiness, the resin bed 14 that adds the phosphor that is useful on the secondary green glow and adding.After a kind of resin bed casting of phosphor is arranged in adding, it can be hardened before introducing next resin bed temporarily.This can suppress the decline of production efficiency, prevents that simultaneously contiguous resin bed from mixing mutually.
Though the inwall of cup 16 can be placed with white resin material,, in order further to improve the luminous efficiency of luminescent device, more preferably use the metal coating inwalls such as silver, aluminium for example that visible light is had a high reflectance.
In Fig. 7, in the schematic section illustrated relate to the alternative manufacture method of the luminescent device of embodiment 9.
In Fig. 7 (A), GaN-base light-emitting component 11 is installed on the hard distributing board 21, and is electrically connected with it by lead 22.Shown in Fig. 7 (B), light-emitting component 11 one after the other with the resin bed casting of the resin bed that adds the phosphor that is useful on secondary ruddiness, the resin bed that adds the phosphor that is useful on the secondary green glow and the phosphor that adding is useful on the secondary blue light, therefore is coated with the resin dome 23 that comprises these resin beds.
Under the situation of not using die head, metal die etc., have the resin of high thixotropic by use, can form resin dome 23.But, shown in Fig. 7 (C), the die head assembly can be used for regulating exactly the thickness of the resin bed that is included in resin dome 23.
In Fig. 7 (C), light-emitting component 11 is coated with the resin bed 23a that is used for ruddiness, and described resin bed 23a comprises the phosphor that is used for red-emitting.Before by pressing mold 25 compactings, 23a hardens temporarily with resin bed.Shown in Fig. 7 (D), this thickness t that can make the resin bed 23a on the end face of light-emitting component 11 is a predetermined value.Similarly, use pressing mold 25 to form the resin bed 23b of the green usefulness that comprises the phosphor that is used for transmitting green light and comprise the resin bed 23c of the blueness usefulness of the phosphor that is used to launch blue light, shown in Fig. 7 (E), can obtain comprising the device that emits white light of light-emitting component 11 thus, described light-emitting component 11 is coated with resin bed 23a, 23b and the 23c with control thickness.Equally in this case, can suppress the decline of production efficiency, prevent that simultaneously contiguous resin bed from mixing mutually,, before covering, resin bed be hardened then temporarily with next resin bed because light-emitting component 11 is covered by a kind of resin bed.
In embodiments of the invention 10, be that gallium nitride (GaN)-based light-emitting diode of 390nm is as light-emitting component with peak wavelength.As for wavelength conversion unit, use to comprise by (Ca
0.985Eu
0.015) AlSiN
3Form the phosphor that is used for ruddiness of expression resin bed, comprise by (Ba
0.70Sr
0.10Eu
0.20) (Mg
0.75Mn
0.25) Al
10O
17Form the phosphor that is used for green glow of expression resin bed, comprise by (Ba
0.80Eu
0.20) MgAl
10O
17The resin bed of forming the phosphor resin bed that is used for blue light of expression.
The difference of the luminescent device of the comparative example 10 that is used for comparing with embodiment 10 and prepares and the luminescent device of embodiment 10 only is that its uses and comprises by (Ba
0.80Eu
0.20) MgAl
10O
17Form the phosphor that is used for blue light of expression and by (Y
052Gd
0.35Ce
0.13)
3Al
5O
12The single resin bed of forming the mixture of the phosphor of representing that is used for gold-tinted.
In embodiment 10 and comparative example 10, be similar under the situation of embodiment 9, make as shown in Figure 1 luminescent device and their performance of assessment.Table 5 shows assessment result.
Table 5
| Brightness (relative value) | Tc-duc | Colorrendering quality (NTSC ratio) |
| |
100.0％ | 7700K-0.001 | 83.8％ |
| Comparative example 10 | 96.8％ | 7700K-0.001 | 47.9％ |
As seen from Table 5, compare the not only brightness but also obtained remarkable improvement of the luminescent device of embodiment 10 at colorrendering quality (NTSC ratio) with comparative example 10.
Embodiment 11-15
With similar ground in embodiment 9 and the comparative example 9, make the luminescent device and the comparative example 11-15 that is used for and they compare of embodiment of the invention 11-15.Their Performance Evaluation the results are shown in table 6.In comparative example 11-15 and comparative example 11-15, the composition of the emission peak wavelength of change light-emitting component and the phosphor of use is made luminescent device shown in Figure 1.
As seen from Table 6, with comprise separately blue light emitting device with activate by divalent europium blue-light excited and the emission gold-tinted (Sr, Ba, Ca)
28iO
4Phosphor or trivalent cerium activation (Y, Gd)
3(Al, Ga)
5O
12The comparative example 11-15 of combination of phosphors compares, and not only brightness but also colorrendering quality (NTSC ratio) are to remarkable improvement to comprise the luminescent device of embodiment 11-15 of the phosphor according to the present invention.
The peak wavelength of the once light that the present invention's requirement is launched from light-emitting component falls within the scope of 380nm to 450nm.The light-emitting component of peak wavelength in 390nm to 420nm scope is more suitable for being used for luminescent device of the present invention.
In order significantly to improve colorrendering quality (NTSC ratio), the half-band width of emission spectrum that need be used in the phosphor (or the component that is used for transmitting green light that wherein comprises) of transmitting green light narrows down.For this reason, because the emission of the light of bivalent manganese (Mn) is fit to, other aluminate is suitable for the matrix of the phosphor of transmitting green light as in the present invention.
One of feature of the foregoing description is, with resin with from the descending of the secondary light wavelength of the phosphor emission that wherein comprises from settling from the nearer side of light-emitting component.But as in the present invention, the single resin bed that will comprise the mixture of this phosphor that is used for three kinds of colors is used under the situation of wavelength conversion unit, and colorrendering quality (NTSC ratio) is not subjected to influencing unfriendly, but brightness significantly reduces.Therefore, when only pursuing the improving of colorrendering quality (NTSC ratio), can use this single resin bed of the hybrid phosphor that comprises three kinds of colors.
In the above-described embodiment, the resin bed that will comprise the phosphor that is used for blue light is layered in the resin bed that comprises the phosphor that is used for green glow.But, be used for the phosphor of green glow, the weak strength of the secondary light of launching in the present invention by exciting of blue light that is about 450nm with wavelength.Even the phosphor blend that this means the phosphor that will be used for green glow and be used for blue light together and be included in single resin bed, the brightness of white light does not almost descend yet, and therefore can keep function of the present invention and effect.
In Fig. 9, in signal vertical section illustrated according to the major part of the luminescent device of the embodiment of the invention 16.The difference of the luminescent device of Fig. 9 and the luminescent device of Fig. 1 is: the bottom that light-emitting component 11 is installed in bowl-type cup 46, described bowl-type cup 46 has the reflecting surface of being made by white resin (interior perimeter surface) and does not have platform, and difference also is: light-emitting component 11 usefulness are comprised the phosphor particles 43,44 of distribution in a predefined manner and 45 transparent resin 42 sealings.
As for transparent resin 42, can use epoxy resin, organic siliconresin etc.At least two kinds of particles that in transparent resin 42, comprise the phosphor particles 45 that is selected from the phosphor particles 43 that is used for ruddiness, the phosphor particles 44 that is used for green glow and is used for blue light, and these phosphor particles distribute with the state of substantial separation stratification according to their kind.In addition, being used to launch more, the phosphor particles of short wavelength's secondary light distributes away from light-emitting component 11 more.
More specifically, transparent resin 42 comprises large-sized phosphor particles 43, middle-sized phosphor particles 44 and undersized phosphor particles 45, and they separate stratification.In this case, the light that can be launched from the phosphor particles of large-size by the phosphor particles scattering of reduced size becomes even irradiation thus.
Can make as shown in Figure 9 luminescent device in following mode.As mentioned above, the phosphor that comprises in transparent resin 42 is those of at least two kinds of the phosphor particles 45 that is selected from the phosphor particles 43 that is used for ruddiness, the phosphor particles 44 that is used for green glow and is used for blue light, their particle size of different types of phosphor particles is regulated, so as the sclerosis before their settling velocity differences in the liquid phase transparent resin.
According to the gravity and the size that contacts the frictional force of leading owing to liquid resin with particle surface that act on the phosphor particles, determine the settling velocity of the phosphor particles in liquid resin.Cube being directly proportional of gravity and particle size, and square being directly proportional of frictional force and particle size.Therefore, the settling velocity of particle size appreciable impact particle.Because the frictional force of liquid resin is not to depend on the resin kind too much, but depend primarily on the surface state of phosphor particles, material and the surface treatment according to phosphor changes thus.
Under the situation of the phosphor particles that does not carry out the special surface processing, the surface area of element quality is big more in thin more particle usually, and its settling velocity is slower than more corase particles (referring to WO 02/059982A1).Incidentally, condensing at the phosphor primary particle forms under the situation of secondary, and settling velocity is not according to the size of primary particle but according to the diameter of secondary and definite.Consider that above-mentioned idea is set up usually,, and can not simply compare although actual phosphor particles is not desirable circle.
For the particle that distributes in liquid resin is separated according to their size, in fact suitable is to use size to be about the phosphor particles of the inorganic material of several μ m.For example, if particle size is reduced to as among the Japanese Patent Application Publication No.2004-071357 about disclosed Bohr radius, separately will take a long time, this is unpractical.
In embodiment 16, can use the phosphor particles that is used for ruddiness, green glow and blue light, their corresponding median particle diameters for example are 13 μ m, 9.5 μ m and 6.5 μ m.Herein, median particle diameter is meant the median of particle size distribution.Usually also with mean particle diameter d
50Parameter as the indication particle size.No matter use the former or the latter, can not produce big influence to effect of the present invention.Incidentally, much less, consider between different types of phosphor clearer separately, the more preferably narrower distribution of particle size in every kind of phosphor.
More specifically, referring again to Fig. 9, different types of phosphor particles 43,44 and 45 that will have different settling velocities is mediated at some, enters in the transparent resin 42 of liquid phase, is introduced into the cup 46 that provides light-emitting component 11.The 42 static placement scheduled times of transparent resin that after this, will comprise phosphor particles 43,44 and 45.Then, the phosphor particles 43 that distributes and have very fast settling velocity makes its concentration higher in the place near cup 46 bottoms, and along with increasing from the distance with the bottom and descending.On the contrary, the phosphor particles 45 that distributes and have more slow falling shallow lake speed makes its concentration lower in the place near cup 46 bottoms, and along with the distance from the bottom increases and improves.Thus, can form the CONCENTRATION DISTRIBUTION of phosphor particles according to its settling velocity.
The chemical formula that should be noted in the discussion above that expression phosphor shown in the embodiment in the above and composition ratio thereof only is representational, if phosphor satisfy above composition and the composition ratio shown in " summary of the invention " part, just can realize effect of the present invention.
As mentioned above, the present invention can provide a kind of luminescent device, it comprises the wavelength conversion unit that comprises multiple phosphor, described wavelength conversion unit is used for effective transmitting response by the ultraviolet light of light-emitting component emission or the light of blue light, radiative color wherein is set easily and high brightness can be provided.In addition, can provide a kind of luminescent device that can radiation has the white light of excellent colorrendering quality (NTSC ratio).
Though described in detail and for example understood the present invention,, should be understood that to be understood that they only illustrate with exemplary, rather than restrictively adopt, the spirit and scope of the present invention are only limited by the clause of accompanying Claim.
Claims (4)
1. luminescent device, it comprises:
Light-emitting component, it is used to launch once light; With
Wavelength conversion unit, its be used for absorption portion once light and emission wavelength than the longer secondary light of light wavelength; Wherein
Described wavelength conversion unit comprises optical absorption characteristics different multiple phosphor mutually, and
At least a phosphor in described multiple phosphor has the absorption characteristic of the secondary light of launching in the another kind of at least phosphor of absorption from described multiple phosphor,
Described wavelength conversion unit comprises the phosphor that is used to launch blue light, be used for the phosphor of transmitting green light and be used for the combination of the phosphor of red-emitting, or is used for the phosphor of transmitting green light and is used for the combination of the phosphor of red-emitting,
The described phosphor that is used for transmitting green light comprise be selected from following at least a:
By a (M2, Eu
e, Mn
f) ObAl
2O
3The aluminate phosphorus of the divalent europium-manganese co-activating of expression,
By 2 (M1
1-g, Eu
g) OSiO
2The silicate phosphors of the divalent europium activation of expression and
By MI
3(MII
1-h, Ce
h)
2(SiO
4)
3The silicate phosphors of the trivalent cerium activation of expression,
Wherein, M2 represents to be selected from least a element among Mg, Ca, Sr, Ba and the Zn; A, b, e and f represent to satisfy the number of a＞0, b＞0,0.1≤a/b≤1.0 and 0.3≤f/e≤5.0; M1 represents to be selected from least a element among Mg, Ca, Sr and the Ba; G represents the number of 0.005≤g≤0.10; MI represents to be selected from least a element among Mg, Ca, Sr and the Ba; MII represents to be selected from least a element among Al, Ga, In, Sc, Y, La, Gd and the Lu; And h represents to satisfy the number of 0.005≤h≤0.5, and
The described phosphor that is used for red-emitting comprises by (MIII
1-j, Eu
j) MIVSiN
3The nitride phosphor of the divalent europium activation of expression, wherein MIII represents to be selected from least a element among Mg, Ca, Sr and the Ba; MIV represents to be selected from least a element among Al, Ga, In, Sc, Y, La, Gd and the Lu; And j represents the number of 0.001≤j≤0.05.
2. according to the luminescent device of claim 1, wherein
The described phosphor that is used for launching blue light comprise be selected from following at least a:
By (M1, Eu)
10(PO
4)
6Cl
2The halophosphate phosphor of the divalent europium activation of expression,
By a (M2, Eu) ObAl
2O
3The aluminate phosphorus of the divalent europium activation of expression and
By a (M2, Eu
c, Mn
d) ObAl
2O
3The aluminate phosphorus of the divalent europium-manganese co-activating of expression,
Wherein, M1 represents to be selected from least a element among Mg, Ca, Sr and the Ba; M2 represents to be selected from least a element among Mg, Ca, Sr, Ba and the Zn; And a, b, c and d represent to satisfy a＞0, the number of b＞0,0.1≤a/b≤1.0 and 0.001≤d/c≤0.2.
3. according to the luminescent device of claim 1, wherein said multiple phosphor has different median particle diameter mutually.
4. according to the luminescent device of claim 2, wherein said multiple phosphor has different median particle diameter mutually.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005157056 | 2005-05-30 | ||
| JP2005157056 | 2005-05-30 | ||
| JP2005-157056 | 2005-05-30 | ||
| JP2005202851 | 2005-07-12 | ||
| JP2005202851 | 2005-07-12 | ||
| JP2005-202851 | 2005-07-12 | ||
| JP2006-059689 | 2006-03-06 | ||
| JP2006059689A JP2007049114A (en) | 2005-05-30 | 2006-03-06 | Light emitting device and method of manufacturing the same |
| JP2006059689 | 2006-03-06 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100878613A Division CN100517781C (en) | 2005-05-30 | 2006-05-30 | Light emitting device and fabricating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101562227A CN101562227A (en) | 2009-10-21 |
| CN101562227B true CN101562227B (en) | 2010-12-08 |
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ID=37484372
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|---|---|---|---|
| CNB2006100878613A Expired - Fee Related CN100517781C (en) | 2005-05-30 | 2006-05-30 | Light emitting device and fabricating method thereof |
| CN2009101417389A Expired - Fee Related CN101562227B (en) | 2005-05-30 | 2006-05-30 | Light emitting device and method of manufacturing the same |
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| CNB2006100878613A Expired - Fee Related CN100517781C (en) | 2005-05-30 | 2006-05-30 | Light emitting device and fabricating method thereof |
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Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009019163A (en) * | 2007-07-13 | 2009-01-29 | Sharp Corp | Phosphor particle aggregate for light emitting device, light emitting device, and backlight device for liquid crystal display |
| JP5183128B2 (en) * | 2007-08-30 | 2013-04-17 | 凸版印刷株式会社 | Liquid crystal display |
| KR101429704B1 (en) | 2008-01-31 | 2014-08-12 | 삼성디스플레이 주식회사 | Wavelength transforming member, Light assembly having the same, and liquid crystal display |
| CN101725843B (en) * | 2008-10-20 | 2012-07-04 | 展晶科技(深圳)有限公司 | System and method for configuring LED backlight module with high color saturation |
| US9293667B2 (en) | 2010-08-19 | 2016-03-22 | Soraa, Inc. | System and method for selected pump LEDs with multiple phosphors |
| TW201145597A (en) * | 2010-01-28 | 2011-12-16 | Lg Innotek Co Ltd | Light emitting device package |
| EP2540798A4 (en) * | 2010-02-26 | 2014-04-30 | Mitsubishi Chem Corp | Halophosphate phosphor and white light emitting device |
| CN102339935B (en) * | 2010-07-15 | 2015-07-08 | 展晶科技(深圳)有限公司 | Flip-chip-type LED (light-emitting diode) package structure |
| DE102010041236A1 (en) * | 2010-09-23 | 2012-03-29 | Osram Ag | Optoelectronic semiconductor component |
| JP2012195425A (en) * | 2011-03-16 | 2012-10-11 | Toshiba Corp | Semiconductor light-emitting device wafer and method of manufacturing semiconductor light-emitting device |
| KR101241511B1 (en) | 2011-03-22 | 2013-03-11 | 엘지이노텍 주식회사 | Light conversion member and display device having the same |
| CN102563543B (en) * | 2011-05-09 | 2015-01-07 | 深圳市绎立锐光科技开发有限公司 | Method and light source for generating high-brightness homogeneous light based on optical wavelength conversion |
| US10688527B2 (en) | 2011-09-22 | 2020-06-23 | Delta Electronics, Inc. | Phosphor device comprising plural phosphor agents for converting waveband light into plural color lights with different wavelength peaks |
| TWI448806B (en) | 2011-09-22 | 2014-08-11 | Delta Electronics Inc | Phosphor device and illumination system and projection equipment with the same |
| US10310363B2 (en) | 2011-09-22 | 2019-06-04 | Delta Electronics, Inc. | Phosphor device with spectrum of converted light comprising at least a color light |
| US8663502B2 (en) | 2011-12-30 | 2014-03-04 | Intematix Corporation | Red-emitting nitride-based phosphors |
| WO2013102222A1 (en) * | 2011-12-30 | 2013-07-04 | Intematix Corporation | Nitride phosphors with interstitial cations for charge balance |
| RU2502917C2 (en) * | 2011-12-30 | 2013-12-27 | Закрытое Акционерное Общество "Научно-Производственная Коммерческая Фирма "Элтан Лтд" | Light diode source of white light with combined remote photoluminiscent converter |
| JP2015510954A (en) * | 2012-03-06 | 2015-04-13 | 日東電工株式会社 | Ceramic body for light emitting devices |
| DE102012210083A1 (en) | 2012-06-15 | 2013-12-19 | Osram Gmbh | OPTOELECTRONIC SEMICONDUCTOR ELEMENT |
| JP6329083B2 (en) * | 2012-12-28 | 2018-05-23 | シャープ株式会社 | Light emitting device |
| CN103325930A (en) * | 2013-06-13 | 2013-09-25 | 苏州金科信汇光电科技有限公司 | Fluorescent LED |
| CN103709678B (en) * | 2013-11-29 | 2016-01-13 | 佛山安亿纳米材料有限公司 | Light-converting film and preparation method thereof |
| TWI528601B (en) | 2014-04-30 | 2016-04-01 | 新世紀光電股份有限公司 | Package method and package structure |
| JP6428089B2 (en) * | 2014-09-24 | 2018-11-28 | 日亜化学工業株式会社 | Light emitting device |
| CN105549262A (en) * | 2016-02-03 | 2016-05-04 | 青岛海信电器股份有限公司 | Backlight unit, backlight source module and liquid-crystal display device |
| WO2017169773A1 (en) * | 2016-03-31 | 2017-10-05 | シャープ株式会社 | Eye-safe light source and method for manufacturing same |
| CN107305313B (en) * | 2016-04-19 | 2020-11-06 | 台达电子工业股份有限公司 | Phosphor device |
| CN107180908B (en) * | 2017-06-27 | 2019-12-27 | 深圳Tcl新技术有限公司 | LED, backlight module and liquid crystal display device |
| CN110060988A (en) * | 2019-04-15 | 2019-07-26 | 佛山市国星光电股份有限公司 | A kind of LED support array, LED support, LED component and display screen |
| CN115725295A (en) * | 2021-08-30 | 2023-03-03 | 兰州大学 | Yellow-green fluorescent powder and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289455A (en) * | 1998-11-30 | 2001-03-28 | 通用电气公司 | Light emitting device with phosphor having high luminous efficacy |
| US6340824B1 (en) * | 1997-09-01 | 2002-01-22 | Kabushiki Kaisha Toshiba | Semiconductor light emitting device including a fluorescent material |
| CN1542990A (en) * | 2003-04-21 | 2004-11-03 | ������������ʽ���� | LED device and portable telephone, digital camera and LCD apparatus using the same |
| US6844671B2 (en) * | 2003-01-31 | 2005-01-18 | General Electric Company | High luminosity phosphor blends for generating white light from near-UV/blue light-emitting devices |
-
2006
- 2006-05-30 CN CNB2006100878613A patent/CN100517781C/en not_active Expired - Fee Related
- 2006-05-30 CN CN2009101417389A patent/CN101562227B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340824B1 (en) * | 1997-09-01 | 2002-01-22 | Kabushiki Kaisha Toshiba | Semiconductor light emitting device including a fluorescent material |
| CN1289455A (en) * | 1998-11-30 | 2001-03-28 | 通用电气公司 | Light emitting device with phosphor having high luminous efficacy |
| US6844671B2 (en) * | 2003-01-31 | 2005-01-18 | General Electric Company | High luminosity phosphor blends for generating white light from near-UV/blue light-emitting devices |
| CN1542990A (en) * | 2003-04-21 | 2004-11-03 | ������������ʽ���� | LED device and portable telephone, digital camera and LCD apparatus using the same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-20010A 2005.01.20 |
Also Published As
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| CN100517781C (en) | 2009-07-22 |
| CN101562227A (en) | 2009-10-21 |
| CN1874019A (en) | 2006-12-06 |
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| CF01 | Termination of patent right due to non-payment of annual fee |