CN101009341A - Fluorescent body and its white light LED - Google Patents
Fluorescent body and its white light LED Download PDFInfo
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- CN101009341A CN101009341A CNA200610002281XA CN200610002281A CN101009341A CN 101009341 A CN101009341 A CN 101009341A CN A200610002281X A CNA200610002281X A CN A200610002281XA CN 200610002281 A CN200610002281 A CN 200610002281A CN 101009341 A CN101009341 A CN 101009341A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The invention relates to a fluorophor and white light LBD. The white light LBD at least includes lightening component, covering layer which covers the lightening component and at least two fluorophors which are distributed in the covering layer evenly. The lightening component can provide a blue light that the wavelength is within 410-500nm; the fluorophor includes the first fluorophor and the second fluorophor which can absorb aprt of the blue light, and inspire the olivine light that the wavelength is within 500-550nm and red light that the wavelength is within 590-650nm. Said blue light, olivine light and red light can generate a white light.
Description
Technical field
The present invention relates to a kind of phosphor body and white light emitting diode thereof, relate to particularly that a kind of utilization can adjust that the yellow-green fluorescent light body of wavelength is arranged in pairs or groups red phosphor body and blue light source and the phosphor body and the white light emitting diode thereof of the high color rendering that produces.
Background technology
Light-emitting diode (light-emitting diode; LED) from the development of the 1970's so far, many key technologies reach its maturity.Especially in recent years, the technical bottleneck of white light emitting diode is existing to be broken through, and adds that it meets the advantage of environmental protection, energy savings, makes white light emitting diode be expected to replace traditional white light source, becomes the main lighting source of 21st century.
The practice of traditional white light emitting diode has two kinds, and the one, utilize blue-light excited yellow phosphor body to produce white light, its efficient that produces white light is higher, but shortcoming is color rendering (color renderingindex; CRI) not good.Another kind of mode is that several phosphor body colour mixtures of utilizing the ultraviolet light collocation can produce different color light produce white light, can solve the not good problem of above-mentioned color rendering.Yet ultra violet applications still has many deterioration problems that can't overcome in the technical of light-emitting diode at present, so is difficult to accurately control its luminous efficiency and the characteristics of luminescence.
At present, the researcher of countries in the world is devoted to the more high efficiency lighting apparatus of exploitation invariably, that is almost do not having at the light that excitation source sent under the situation of consume, excite phosphor body and produce light with high conversion efficiency, so light source and phosphor body must be controlled under the optimal condition, to promote both luminous powers.In addition, for improving the luminescent quality of light-emitting diode, except requiring low power consumption and high brightness, its color expressive ability also is the emphasis of considering, to continue to promote the quality of white light emitting diode.
This shows that above-mentioned existing phosphor body and white light emitting diode obviously still have inconvenience and defective, and demand urgently further being improved in structure and use.In order to solve the problem that phosphor body and white light emitting diode thereof exist, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.Therefore that how to found a kind of new structure possesses high-luminous-efficiency, high brightness and high color rendering, and is applicable to phosphor body and white light emitting diode thereof under general and the high power conditions, has just become the current industry utmost point to need improved target.
Summary of the invention
The objective of the invention is to, overcome the defective that existing white light emitting diode exists, and provide a kind of white light emitting diode of new structure, technical problem to be solved is to make it can improve the relatively poor problem of white light emitting diode color rendering of utilizing traditional phot-luminescence (photoluminescence) mode to make, thereby is suitable for practicality more.
Another object of the present invention is to, overcome the defective that existing phosphor body exists, and provide a kind of phosphor body of new structure, technical problem to be solved is to make it can be by ratio and the combination of adjusting metallic element in the phosphor body, obtain the coloured light of desirable wave-length coverage, thereby be suitable for practicality more.
Another purpose of the present invention is, overcome the defective that existing phosphor body exists, and provide a kind of phosphor body of new structure, technical problem to be solved is it can be measured by the difference replacement of adding metal reach the purpose of adjusting wavelength, and improve the activity of this phosphor body, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of white light emitting diode that the present invention proposes, it comprises: a light-emitting component can produce the blue light that wave-length coverage is 410～500nm; One coating layer, be coated on this light-emitting component around; One first phosphor body is scattered in this coating layer, can absorb the blue light that this light-emitting component produces, and is the green-yellow light of 500～550nm to produce wave-length coverage; And one second phosphor body, be scattered in this coating layer, can absorb the blue light that this light-emitting component produces, to produce wave-length coverage is the ruddiness of 590-650nm, by green-yellow light and ruddiness that this first phosphor body and this second phosphor body are emitted respectively, the blue light that is produced with this light-emitting component produces white light.
The object of the invention to solve the technical problems also adopts following technical measures to adopt further realization.
Aforesaid white light emitting diode, the material of wherein said light-emitting component are nitrogen indium gallium, gallium nitride/carborundum or above-mentioned combination in any.
Aforesaid white light emitting diode, wherein said first phosphor body are the silicate compound of trivalent europium ion activation, and its chemical formula is ((2-x-y-z) Sr (x) Ca (y) Mg) (1-a) SiO
4AGa
2O
3: (z) Eu, and its constituent content x, y, z, a is neither equals zero.
Aforesaid white light emitting diode, wherein said second phosphor body are the alkaline earth sulfide of trivalent europium ion activation, and chemical formula is (xAyBzC) S:Eu, and its constituent content x, y and z is neither equals zero.
Aforesaid white light emitting diode, three kinds of elements of wherein said A, B and C are to be selected from by beryllium, magnesium, calcium, strontium, barium, sodium, potassium, lithium or its group that forms.
Aforesaid white light emitting diode, the mixed proportion of wherein said first phosphor body and this second phosphor body is respectively 3% and 1.5%.
The object of the invention to solve the technical problems also realizes by the following technical solutions.According to a kind of phosphor body that the present invention proposes, it comprises: a silicate compound, its chemical formula are ((2-x-y-z) Sr (x) Ca (y) Mg) (1-a) SiO
4AGa
2O
3: (z) Eu, wherein, the ratio of constituent content x, y, z and a that this silicate compound is contained between following scope: 0.1≤x≤0.6,0.1≤y≤0.6,0.01≤z≤0.15,0.02≤a≤0.1, wherein, x, y, z and a all are not equal to zero, and this phosphor body emit wavelength scope after exciting is the green-yellow light of 500～550nm.
The object of the invention to solve the technical problems also adopts following technical measures to adopt further realization.
Aforesaid phosphor body, it more comprises a sensitizer, is to be selected from by manganese, cerium, gadolinium, terbium or its group that forms.
The object of the invention to solve the technical problems also realizes by the following technical solutions.A kind of phosphor body according to the present invention's proposition, it comprises: an alkaline earth sulfide, its chemical formula is (xAyBzC) S:Eu, and wherein the ratio of contained constituent content x, y of this alkaline earth sulfide and z is between following scope: 0.1≤x≤0.6,0.1≤y≤0.6,0.01≤z≤0.15.Wherein, x, y and z all are not equal to zero, and this phosphor body emit wavelength scope after exciting is the ruddiness of 590～650nm.
The object of the invention to solve the technical problems also adopts following technical measures further to realize.
Aforesaid phosphor body, the A of wherein said this alkaline earth sulfide of composition, B, three kinds of elements of C are to be selected from the group that is made up of beryllium, magnesium, calcium, strontium, barium, sodium, potassium, lithium and above-mentioned combination in any.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
In order to achieve the above object, the invention provides a kind of phosphor body, propose a kind of silicate compound by trivalent europium (Eu) ion activation, can be by the blue-light excited generation wave-length coverage green-yellow light that is 500～550nm.According to a preferred embodiment of the present invention, the chemical formula of this silicate compound is ((2-x-y-z) Sr (x) Ca (y) Mg) (1-a) SiO
4AGa
2O
3: (z) Eu can reach the purpose of adjusting wavelength by the difference replacement amount x, y, z and a that add metal.Can utilize a sensitizer in addition, for example manganese or lanthanide element improve the activity of this phosphor body.
In addition, in order to achieve the above object, the present invention also provides a kind of phosphor body, proposes a kind of alkaline earth sulfide by trivalent europium (Eu) ion activation, can be by the blue-light excited generation wave-length coverage ruddiness that is 590～650nm.According to a preferred embodiment of the present invention, the chemical formula of this alkaline earth sulfide is (xAyBzC) S:Eu.Form main element A, the B of this alkaline earth sulfide or C and can be selected from divalent metal element or monoacidic base metallic element wantonly three kinds, for example beryllium, magnesium, calcium, strontium, barium, sodium, potassium, lithium etc., ratio and combination by adjusting the aforementioned metal element can obtain desirable wave-length coverage.
In addition, in order to achieve the above object, the present invention also provides a kind of white light emitting diode, has a light-emitting component, a coating layer and at least two phosphor bodies.
According to a preferred embodiment of the present invention, the material of above-mentioned light-emitting component is the polynary complex chemical compound of VA family, can radiate the blue light that wave-length coverage is 410～500nm.Coating layer is coated on around this light-emitting component, is a transparent encapsulation material, inorganic transparent glue for example, and the light that can improve this white light emitting diode packaging body takes out efficient.Two phosphor bodies are dispersed in this coating layer, comprise one first phosphor body, can absorb the part blue light that is produced by light-emitting component, are converted to the green-yellow light of wave-length coverage 500～550nm; And second phosphor body, can absorb the part blue light that light-emitting component produces, be converted to the ruddiness that wave-length coverage is 590～650nm.Can produce luminous efficiency height and color rendering via the wave-length coverage of this blue light of suitable control, green-yellow light and ruddiness and reach white light more than 88.
By technique scheme, phosphor body of the present invention and white light emitting diode thereof have following advantage at least:
1, the phosphor body based on alkaline earth sulfide of the present invention can obtain the coloured light of desirable wave-length coverage, thereby be suitable for practicality more by ratio and the combination of adjusting metallic element in the phosphor body.
2, the phosphor body based on silicate compound of the present invention can be measured the purpose that reaches the adjustment wavelength by the difference replacement of adding metal, and improve the activity of this phosphor body, thereby be suitable for practicality more.
3, light-emitting diode of the present invention can produce luminous efficiency height and color rendering via the wave-length coverage of this blue light of suitable control, green-yellow light and ruddiness and reach white light more than 88.
Therefore, according to as can be known above-mentioned, the present invention utilizes the yellow-green fluorescent light body that can adjust wavelength arrange in pairs or groups red phosphor body and blue light, can show the color rendering that improves white light emitting diode by mixing this three coloured light.
In sum, the invention relates to a kind of phosphor body and white light emitting diode thereof.This white light emitting diode comprises light-emitting component at least, is coated on the coating layer around this light-emitting component and is dispersed at least two phosphor bodies in the coating layer.It is the blue light of 410～500nm that light-emitting component can provide a wave-length coverage; Phosphor body comprises first phosphor body and second phosphor body, can absorb the part blue light that this light-emitting component produces, and inspiring green-yellow light and the wave-length coverage that wave-length coverage is 500～550nm respectively is the ruddiness of 590～650nm.Can produce a white light by mixing above-mentioned blue light, green-yellow light and ruddiness.The present invention can improve the relatively poor problem of white light emitting diode color rendering of utilizing traditional phot-luminescence (photoluminescence) mode to make; Can obtain the coloured light of desirable wave-length coverage by ratio and the combination of adjusting metallic element in the phosphor body in addition; Can also measure the purpose that reaches the adjustment wavelength by the difference replacement of adding metal, and improve the activity of this phosphor body.It has above-mentioned many advantages and practical value, no matter bigger improvement is all arranged on product structure or function, have large improvement technically, and produced handy and practical effect, and more existing phosphor body and white light emitting diode thereof have the multinomial effect of enhancement, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the sectional view according to the white light-emitting diode package structure of preferred embodiment of the present invention.
Fig. 2 is the exciting light spectrogram according to a kind of blue light, green-yellow light and the ruddiness of preferred embodiment of the present invention.
100: package structure for LED 110: base material
120: light-emitting component 130: coating layer
132: the second phosphor bodies of 131: the first phosphor bodies
210: crest 220: crest
230: crest
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to phosphor body and its embodiment of white light emitting diode, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
White light emitting diode provided by the invention can produce the white light of high brightness and high color rendering, and therefore, the advantage of technology provided by the present invention can be in order to solve the problem of existing traditional white light emitting diode color rendering difference.
Seeing also shown in Figure 1ly, is the sectional view according to the white light-emitting diode package structure of preferred embodiment of the present invention.The white light-emitting diode package structure 100 of preferred embodiment of the present invention comprises base material 110, light-emitting component 120, coating layer 130, first phosphor body 131 and second phosphor body 132, wherein:
This base material 110 is the base of carrying light-emitting component 120, and it can constitute by Heat Conduction Material (for example material such as metal or organic polymer).In addition, base material 110 also can be printed circuit board (PCB).
This light-emitting component 120 is attached on the base material 110, is the blue-light-emitting wafer.Light-emitting component 120 can be made of semi-conducting material, and for example the polynary complex chemical compound of VA family comprises nitrogen indium gallium (InGaN), gallium nitride/carborundum (GaN/SiC) or above-mentioned combination in any.Light-emitting component 120 is to produce with general luminescent diode component manufacture, can radiate the blue light that wave-length coverage is 410nm～500nm under electric current 20 milliamperes (mA) operation.
This coating layer 130 is coated on around the light-emitting component 120, can be a transparent encapsulation material, for example the high index of refraction inorganic material.The refractive index of above-mentioned inorganic material is greater than 1.40, and for example silica gel or material silica gel composite are taken out efficient in order to the light that improves this white light emitting diode packaging body.
In coating layer 130, also be mixed with two or more phosphor bodies, and this two or more phosphor body is dispersed in all in this coating layer 130.Above-mentioned phosphor body comprises first phosphor body 131 and second phosphor body 132 at least, and wherein the mixed proportion of first phosphor body 131 and second phosphor body 132 is respectively 3% and 1.5%.
According to preferred embodiment of the present invention, this first phosphor body 131, its main body (host) is a silicate compound, its chemical formula is ((2-x-y-z) Sr (x) Ca (y) Mg) (1-a) SiO
4AGa
2O
3: (z) Eu.Wherein x, y, z, a all are not equal to zero, and the value of a is 0.02≤a≤0.1.Trivalent europium (Eu) metal ion is as an active element (activator), can combinedly incorporate host lattice into to form a center of giving out light that can be excited.In addition, still can reach the purpose of adjusting wavelength by the ratio of adjusting base metal elements strontium (Sr), calcium (Ca) or magnesium (Mg).When strontium, calcium content are low, phosphor powder should be inclined to one side green glow, after adding more strontium, calcium, because of diminishing, atom causes difference on can rank, photochromic meeting slowly to long wavelength shifted, therefore can reach the light wavelength scope that first phosphor body is emitted of adjusting by the ratio that strontium, calcium metal add from the wavelength of green glow.But the ratio of strontium, the interpolation of calcium metal and the skew of wavelength do not have the relation that geometric ratio increases.Wherein, the content ratio of base metal element is between following scope:
x：0.1≤x≤0.6
y：0.1≤y≤0.6
z：0.01≤z≤0.15
In addition, can also utilize a metallic element, for example manganese or lanthanide element, for example cerium (Ce), gadolinium (Gd), terbium elements such as (Tb) are as sensitizer (sensitizer), to be transferred to the active element of first phosphor body 131 behind the energy that absorbs exciting light, use the intensity of giving out light that improves this first phosphor body 131.But first phosphor body, 131 absorption portion blue lights and emit wavelength scope are the green-yellow light of 500～550nm.
This second phosphor body 132, its main body are an alkaline earth sulfide, and its chemical formula is (xAyBzC) S:Eu.Wherein, x, y, z all are not equal to zero.Trivalent europium (Eu) metal ion is as active element, can be in conjunction with incorporating host lattice into to form a center that can be excited and give out light.Three kinds of elements of A, B, C of forming this alkaline earth sulfide can be selected from divalent metal element respectively, for example any three kinds of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba); Also can mix the monoacidic base metallic element, for example sodium (Na), potassium (K), lithium (Li) etc. by proper proportion and combination thereof, can obtain desirable wave-length coverage as adjusting.The content ratio of the base metal element of this alkaline earth sulfide is between following scope:
x：0.1≤x≤0.6
y：0.1≤y≤0.6
z：0.01≤z≤0.15
But second phosphor body, 132 absorption portion blue lights and emit wavelength scope are the ruddiness of 590～650nm.
Therefore, preferred embodiment of the present invention is to utilize above-mentioned light-emitting component 120 to produce blue light, and the blue light that utilizes first phosphor body 131 can adjust wavelength and second phosphor body, 132 absorption portion to be producing green-yellow light and ruddiness, and by mixing the white light emitting diode that this blue light, green-yellow light and ruddiness obtain high color rendering.
Seeing also shown in Figure 2ly, is the exciting light spectrogram of the white light emitting diode of preferred embodiment of the present invention, wherein, the longitudinal axis be luminous intensity (intensity, %), transverse axis be wavelength (wavelength, nm).Under the condition of color rendering 88, analyze the light wavelength scope that white light emitting diode sent of preferred embodiment of the present invention, crest 210 is the blue light that light-emitting component 120 produces, and its luminous intensity is the strongest, and wave-length coverage is between 410～500nm.Crest 220 for based on first phosphor body 131 of silicate compound by the radiation wavelength of the gold-tinted that blue light inspired, its wave-length coverage can be between 500～550nm.230 on crest for based on second phosphor body 132 of alkaline earth sulfide by the radiation wavelength of the ruddiness that blue light inspired, its wave-length coverage can be between 500～550nm.The white light emitting diode of preferred embodiment of the present invention can be adopted via this blue light of suitable control, green-yellow light and ruddiness and produces luminous efficiency height and color rendering and reach white light more than 88.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the structure that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, but every content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (10)
1, a kind of white light emitting diode is characterized in that it comprises:
One light-emitting component can produce the blue light that wave-length coverage is 410～500nm;
One coating layer, be coated on this light-emitting component around;
One first phosphor body is scattered in this coating layer, can absorb the blue light that this light-emitting component produces, and is the green-yellow light of 500～550nm to produce wave-length coverage; And
One second phosphor body, be scattered in this coating layer, can absorb the blue light that this light-emitting component produces, to produce wave-length coverage is the ruddiness of 590～650nm, by green-yellow light and ruddiness that this first phosphor body and this second phosphor body are emitted respectively, the blue light that is produced with this light-emitting component produces white light.
2, white light emitting diode according to claim 1, the material that it is characterized in that wherein said light-emitting component are nitrogen indium gallium, gallium nitride/carborundum or above-mentioned combination in any.
3, white light emitting diode according to claim 1 is characterized in that wherein said first phosphor body is the silicate compound of trivalent europium ion activation, and its chemical formula is ((2-x-y-z) Sr (x) Ca (y) Mg) (1-a) SiO
4AGa
2O
3: (z) Eu, and its constituent content x, y, z, a is neither equals zero.
4, white light emitting diode according to claim 1 is characterized in that wherein said second phosphor body is the alkaline earth sulfide of trivalent europium ion activation, and chemical formula is (xAyBzC) S:Eu, and its constituent content x, y and z is neither equals zero.
5, white light emitting diode according to claim 4 is characterized in that three kinds of elements of wherein said A, B and C are to be selected from by beryllium, magnesium, calcium, strontium, barium, sodium, potassium, lithium or its group that forms.
6, white light emitting diode according to claim 1 is characterized in that the mixed proportion of wherein said first phosphor body and this second phosphor body is respectively 3% and 1.5%.
7, a kind of phosphor body is characterized in that it comprises: a silicate compound, its chemical formula are ((2-x-y-z) Sr (x) Ca (y) Mg) (1-a) SiO
4AGa
2O
3: (z) Eu, wherein, the ratio of constituent content x, y, z and a that this silicate compound is contained is between following scope:
0.1≤x≤0.6、
0.1≤y≤0.6、
0.01≤z≤0.15、
0.02≤a≤0.1，
Wherein, x, y, z and a all are not equal to zero, and this phosphor body emit wavelength scope after exciting is the green-yellow light of 500～550nm.
8, phosphor body according to claim 7 is characterized in that it more comprises a sensitizer, is to be selected from by manganese, cerium, gadolinium, terbium or its group that forms.
9, a kind of phosphor body is characterized in that it comprises:
One alkaline earth sulfide, its chemical formula are (xAyBzC) S:Eu, and wherein the ratio of contained constituent content x, y of this alkaline earth sulfide and z is between following scope:
0.1≤x≤0.6、
0.1≤y≤0.6、
0.01≤z≤0.15；
Wherein, x, y and z all are not equal to zero, and this phosphor body emit wavelength scope after exciting is the ruddiness of 590～650nm.
10, phosphor body according to claim 9, the three kinds of elements of A, B, C that it is characterized in that wherein said this alkaline earth sulfide of composition are to be selected from the group that is made up of beryllium, magnesium, calcium, strontium, barium, sodium, potassium, lithium and above-mentioned combination in any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610002281XA CN100449803C (en) | 2006-01-27 | 2006-01-27 | Fluorescent body and its white light LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610002281XA CN100449803C (en) | 2006-01-27 | 2006-01-27 | Fluorescent body and its white light LED |
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| CN101009341A true CN101009341A (en) | 2007-08-01 |
| CN100449803C CN100449803C (en) | 2009-01-07 |
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| CNB200610002281XA Expired - Fee Related CN100449803C (en) | 2006-01-27 | 2006-01-27 | Fluorescent body and its white light LED |
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| CN102140343A (en) * | 2011-03-10 | 2011-08-03 | 常熟市江南荧光材料有限公司 | Synthesis method of red fluorescent powder |
| CN102192410A (en) * | 2010-03-03 | 2011-09-21 | 创巨光科技股份有限公司 | High-color-rendering light-emitting module and manufacturing process thereof |
| CN104178138A (en) * | 2013-05-23 | 2014-12-03 | 海洋王照明科技股份有限公司 | Europium-doped gallium silicate luminescent film, preparing method thereof and electroluminescent device |
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| WO2003080763A1 (en) * | 2002-03-25 | 2003-10-02 | Philips Intellectual Property & Standards Gmbh | Tri-color white light led lamp |
| US20040207311A1 (en) * | 2003-04-18 | 2004-10-21 | Jung-Pin Cheng | White light emitting device |
| US7026755B2 (en) * | 2003-08-07 | 2006-04-11 | General Electric Company | Deep red phosphor for general illumination applications |
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| CN102192410A (en) * | 2010-03-03 | 2011-09-21 | 创巨光科技股份有限公司 | High-color-rendering light-emitting module and manufacturing process thereof |
| CN102192410B (en) * | 2010-03-03 | 2012-10-31 | 创巨光科技股份有限公司 | High-color-rendering light-emitting module and manufacturing process thereof |
| CN102140343A (en) * | 2011-03-10 | 2011-08-03 | 常熟市江南荧光材料有限公司 | Synthesis method of red fluorescent powder |
| CN102140343B (en) * | 2011-03-10 | 2013-02-27 | 常熟市江南荧光材料有限公司 | Synthesis method of red fluorescent powder |
| CN104178138A (en) * | 2013-05-23 | 2014-12-03 | 海洋王照明科技股份有限公司 | Europium-doped gallium silicate luminescent film, preparing method thereof and electroluminescent device |
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| CN110582859B (en) * | 2017-05-02 | 2023-09-15 | 昕诺飞控股有限公司 | Warm white LED spectrum, particularly for retail applications |
| CN108565327A (en) * | 2018-01-11 | 2018-09-21 | 深圳大学 | A kind of white light synthetic method and device based on carbon nano-particles |
| CN108565327B (en) * | 2018-01-11 | 2019-11-22 | 深圳大学 | A kind of white light synthetic method and device based on carbon nano-particles |
| US20210273141A1 (en) * | 2019-08-09 | 2021-09-02 | Eyesafe Inc. | White led light source and method of making same |
| CN111578159A (en) * | 2020-05-22 | 2020-08-25 | 中国科学院半导体研究所 | High-color-rendering-index and color-temperature-adjustable high-luminous-flux white-light laser lighting device |
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