CN101806429B - Colorful light-emitting device - Google Patents
Colorful light-emitting device Download PDFInfo
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- CN101806429B CN101806429B CN200910007230XA CN200910007230A CN101806429B CN 101806429 B CN101806429 B CN 101806429B CN 200910007230X A CN200910007230X A CN 200910007230XA CN 200910007230 A CN200910007230 A CN 200910007230A CN 101806429 B CN101806429 B CN 101806429B
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- Prior art keywords
- fluorescent material
- light
- wavelength
- emitting device
- emitting component
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- 239000000463 material Substances 0.000 claims abstract description 76
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 17
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 53
- 230000004913 activation Effects 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 5
- 229910018509 Al—N Inorganic materials 0.000 claims description 4
- 229910018516 Al—O Inorganic materials 0.000 claims description 4
- 229910052771 Terbium Inorganic materials 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 2
- -1 terbium rare earth Chemical class 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 10
- 150000002910 rare earth metals Chemical class 0.000 abstract description 7
- 150000004706 metal oxides Chemical class 0.000 description 9
- 238000001228 spectrum Methods 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a colorful light-emitting device which utilizes a light-emitting element to emit light with a first wave length to excite a first fluorescent material, a second fluorescent material and a third fluorescent material so that the first fluorescent material, the second fluorescent material and the third fluorescent material respectively emit light with a second wavelength, light with a third wavelength and light with a fourth wavelength to be mixed into colorful light. The first fluorescent material, the second fluorescent material and the third fluorescent material all cover on the light-emitting element, and the first fluorescent material, the second fluorescent material and the third fluorescent material are respectively metallic oxides activated by europium metal, nitric oxides activated by rare-earth metal and nitric oxides activated by europium metal.
Description
Technical field
The invention relates to a kind of light-emitting device, and particularly relevant for a kind of color light emitting device.
Background technology
The method of known making colorful light-emitting diode mainly contains two kinds of methods.A kind of mode is directly to send the color light source of different wave length, for example ruddiness, orange light, gold-tinted, blue light or green glow etc. with light-emitting diode chip for backlight unit.But, adjust because the wavelength of illuminating source is difficult, and the half-wave of its optical source wavelength is wide fixing, so the color that can change is less.
Another kind of mode then is to utilize light-emitting diode chip for backlight unit and fluorescent material, allows the light that light-emitting diode chip for backlight unit sent come excitated fluorescent powder luminous, forms new light sources in the mixed light mode.Yet because fluorescent material inspires light after can absorbing the light that light-emitting diode chip for backlight unit sends again, therefore, it is poor that the luminous efficiency of this illuminating source not only can purer chip-shaped LED source, and the stability of its brightness is also lower.
Therefore, need a kind of Improvement type color light emitting device badly, to solve the above problems.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of variation color more and luminous efficiency is preferable, the color light emitting device that brightness constancy is higher.
To achieve these goals, according to one embodiment of the invention, the present invention proposes a kind of color light emitting device.It is the light that utilizes light-emitting component to emit to have first wavelength, excites first fluorescent material, second fluorescent material and the 3rd fluorescent material, makes its light of emitting second wavelength, three-wavelength and the 4th wavelength respectively, to be mixed into a colourama.Above-mentioned first, second and the 3rd fluorescent material all are covered on the light-emitting component, and the material of first, second and the 3rd fluorescent material is respectively the metal oxide of an europium metal activation, the nitrogen oxide of rare earth activated and the nitrogen oxide of europium metal activation.
Above-mentioned first wave-length coverage be between between the 360nm to 420nm, second wave-length coverage between between the 420nm to 480nm, wavelength range between between the 510nm to 550nm and the 4th wave-length coverage between between the 560nm to 640nm.
Purple light or ultraviolet light that the present invention utilizes light-emitting component to send excite the metal oxide of europium metal activation, the nitrogen oxide of rare earth activated and the nitrogen oxide of europium metal activation, to be mixed into a colourama.Moreover, the fluorescent material of nitrogen oxide not only can be subjected to the light that light-emitting component sends and excite, and the blue light that metal oxide phosphor sent that can be subjected to coming from the europium metal activation excites, that is to say, the fluorescent material of nitrogen oxide can be excited under the light source of purple light and blue light expeditiously.Thus, then can improve luminous efficiency.
In addition, because red fluorescence powder of the present invention and green emitting phosphor are the nitrogen oxide of metal, therefore but these fluorescent material can not produce the situation of cracking, and then can effectively improve the stability and the stability of light-emitting device at hot and humid down equal stable existence.In addition, color light emitting device of the present invention also can produce white light via the fluorescent material of adjusting different proportion.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of appended accompanying drawing:
Fig. 1 is the spectrum of first fluorescent material after purple light excited in one embodiment of the invention;
Fig. 2 is the spectrum of second fluorescent material after purple light excited in one embodiment of the invention;
Fig. 3 is the spectrum of the 3rd fluorescent material after purple light excited in one embodiment of the invention;
Fig. 4 is a kind of spectrum that produces colourama after colour mixture in one embodiment of the invention.
The specific embodiment
The present invention proposes a kind of color light emitting device, and it is to utilize ultraviolet light or purple light to excite the fluorescent material of nitrogen oxide and the metal oxide of europium metal activation, producing diversified color light source, and significantly improves the stability of device.Wherein, the set-up mode of the metal oxide of nitric oxide fluorescent powder and europium metal activation can directly be coated on the light-emitting component, or utilizes packing colloid, but not as limit.Below will be describing to come clearly to set forth spirit of the present invention in detail, as the personnel that are familiar with this technology are after understanding preferred embodiment of the present invention, when can be by disclosed technology, change and modification, it does not break away from spirit of the present invention and scope.
In one embodiment of this invention, color light emitting device of the present invention mainly is to comprise that light-emitting component and the packing colloid that coats thereon constitute, and wherein, packing colloid has first fluorescent material, second fluorescent material and the 3rd fluorescent material and intersperses among wherein.First fluorescent material, second fluorescent material and the 3rd fluorescent material are respectively the metal oxide of an europium metal activation, the nitrogen oxide of rare earth activated and the nitrogen oxide of europium metal activation.Generally speaking, color light emitting device can also comprise the bogey that carries light-emitting component, for example circuit board or support etc., but not as limit.
Above-mentioned light-emitting component can for example be a light emitting diode, and this light-emitting component is made up of at least one semi-conducting material.Wherein, this semi-conducting material is preferably the polynary complex chemical compound of III-V family.
First fluorescent material is the metal oxide of an europium metal activation, and its chemical formula for example can be (M
1-x-y, Q
x, Eu
y) Mg
2Al
16O
27, wherein M and Q are metallic element, 0≤x＜0.5,0.01＜y＜0.20.Above-mentioned metallic element for example can be calcium, strontium or barium.
Second fluorescent material is made up of the metal oxynitride of rare earth activated, for example can use the rare earth metal of cerium (Ce) and/or terbium (Tb) to activate it.In one embodiment of this invention, the chemical formula of this second fluorescent material for example can for (Y, M)
(m/val)Si
(12-m-n)Al
(m+n)O
nN
(16-n): Ce
s, Tb
t, wherein Y is a yttrium, M is a metallic element, for example is calcium constituent or barium element, m representative structure Al-N bond number, n representative structure Al-O bond number, val represents the valence mumber of metallic element M, and 0.8＜n＜2.0,2.0＜m+n＜3.0,0.1＜s＜0.5,0＜t＜0.1.
The 3rd fluorescent material is made up of the metal oxynitride of europium metal activation.In one embodiment of this invention, the chemical formula of this 3rd fluorescent material for example can for (Y, M)
(m/val)Si
(12-m-n)Al
(m+n)O
nN
(16-n): Eu
z, wherein Y is a yttrium, M is a metallic element, for example is calcium constituent or barium element, m representative structure Al-N bond number, n representative structure Al-O bond number, val represents the valence mumber of metallic element M, and 0.8＜n＜2.0,2.0＜m+n＜3.0,20%＜z＜50%.
In one embodiment of this invention, the light that light-emitting component sent has first wavelength, light-emitting component luminous light can excite first fluorescent material, second fluorescent material and the 3rd fluorescent material, and first fluorescent material, second fluorescent material and the 3rd fluorescent material is after absorbing first wavelength, can be excited respectively to produce the light with second wavelength, three-wavelength and the 4th wavelength.The light of above-mentioned first wavelength that light-emitting component sent can mix with the light of second wavelength, the light of three-wavelength and the light of the 4th wavelength, and produces a colourama.
In one embodiment of this invention, light-emitting component can send for example purple light or ultraviolet light, and first fluorescent material can be sent blue light after exciting, and second fluorescent material then can be sent green glow after exciting, and the 3rd fluorescent material then can be sent ruddiness after exciting.Wherein, the first above-mentioned wave-length coverage for example can be between being between the 360nm to 420nm.First fluorescent material can absorb the light wavelength scope that is excited, for example between being between the 300nm to 410nm, second fluorescent material can absorb the light wavelength scope that is excited, for example between being 360nm to 480nm, and the 3rd fluorescent material can absorb the light wavelength scope that is excited, for example between between the 360nm to 480nm.
In the present embodiment, first fluorescent material through purple light excited spectrum after going out as shown in Figure 1, second fluorescent material through purple light excited spectrum after going out as shown in Figure 2, and the 3rd fluorescent material is through purple light excited spectrum after going out as shown in Figure 3.In this embodiment, the light that first fluorescent material sends after exciting, second wave-length coverage that it had, for example between 420nm between about 480nm.In another embodiment, second wave-length coverage can be between being between the 440nm to 460nm.The light that second fluorescent material sends after exciting, the wavelength range that it had are for example between between the 500nm to 570nm.In another embodiment, wavelength range can be more preferred between between the 520nm to 540nm between being between the 510nm to 550nm.And the light that the 3rd fluorescent material sends after exciting, the 4th wave-length coverage that it had is for example between between the 560nm to 640nm.In another embodiment, the 4th wave-length coverage is between between the 600nm to 640nm, and better person is between between the 610nm to 630nm.
In one embodiment of this invention, the ruddiness that the blue light that the purple light that light-emitting component sent, first fluorescent material are produced, the green glow that second fluorescent material is produced and the 3rd fluorescent material are produced can produce a colourama after the mixing, and its mixed light spectrum as shown in Figure 4.Perhaps, can also to send light with different colors, for example can be white light by adjusting the ratio of fluorescent material.
Therefore, by the above embodiments as can be known, the present invention is purple light or the ultraviolet light that utilizes light-emitting component to send, and excites the metal oxide of europium metal activation, the nitrogen oxide of rare earth activated and the nitrogen oxide of europium metal activation, to be mixed into a colourama.Moreover, the fluorescent material of nitrogen oxide not only can be subjected to the light that light-emitting component sends and excite, and the blue light that metal oxide phosphor sent that can be subjected to coming from the europium metal activation excites, that is to say, the fluorescent material of nitrogen oxide can be excited under the light source of purple light and blue light expeditiously.Thus, then can improve luminous efficiency.
In addition, because red fluorescence powder of the present invention and green emitting phosphor are the nitrogen oxide of metal, therefore but these fluorescent material can not produce the situation of cracking, and then can effectively improve the stability and the stability of light-emitting device at hot and humid down equal stable existence.In addition, color light emitting device of the present invention more can produce white light via the fluorescent material of adjusting different proportion.
Though the present invention discloses as above with embodiment; right its is not in order to qualification the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is when being as the criterion with the scope that claims were defined.
Claims (6)
1. a color light emitting device is characterized in that, comprises:
One light-emitting component can send the light with one first wavelength, and the scope of this first wavelength is a ultraviolet region;
One first fluorescent material is covered on this light-emitting component, and this first fluorescent material chemical formula is (M
L-x-y, Q
x, Eu
y) Mg
2Al
16O
27, wherein M and Q are a metallic element, 0≤x＜0.5,0.01＜y＜0.20, and this first fluorescent material inspires the fluorescence with one second wavelength after absorbing the light of this first wavelength;
One second fluorescent material is covered on this light-emitting component, this second fluorescent material chemical formula be (Y, M)
(m/val)Si
(12-m-n)Al
(m+n)O
nN
(16-n): Ce
s, Tb
tWherein Y is a yttrium, M is a metallic element, m representative structure Al-N bond number, n representative structure Al-O bond number, val represents the valence mumber of this metallic element M, 0.8＜n＜2.0,2.0＜m+n＜3.0,0.1＜s＜0.5,0＜t＜0.1, this second fluorescent material inspire the fluorescence with a three-wavelength after absorbing the light of this first wavelength; And
One the 3rd fluorescent material is covered on this light-emitting component, and the 3rd fluorescent material (Y, M)
(m/val)Si
(12-m-n)Al
(m+n)O
nN
(16-n): Eu
zWherein Y is a yttrium, M is a metallic element, m representative structure Al-N bond number, n representative structure Al-O bond number, val represents the valence mumber of this metallic element M, 0.8＜n＜2.0,2.0＜m+n＜3.0,20%＜z＜50%, the 3rd fluorescent material inspires the fluorescence with one the 4th wavelength after absorbing the light of this first wavelength, wherein this first, this second, the 3rd is mixed into a colourama with the light of the 4th wavelength.
2. color light emitting device according to claim 1 is characterized in that, this second wave-length coverage is between between the 420nm to 480nm.
3. color light emitting device according to claim 1 is characterized in that, this second fluorescent material is the nitrogen oxide of a cerium and/or terbium rare earth activated.
4. color light emitting device according to claim 1 is characterized in that this wavelength range is between between the 500nm to 570nm.
5. color light emitting device according to claim 1 is characterized in that, the 3rd fluorescent material is the nitrogen oxide of an europium metal activation thing.
6. color light emitting device according to claim 1 is characterized in that, the 4th wave-length coverage is between between the 560nm to 640nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910007230XA CN101806429B (en) | 2009-02-13 | 2009-02-13 | Colorful light-emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910007230XA CN101806429B (en) | 2009-02-13 | 2009-02-13 | Colorful light-emitting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101806429A CN101806429A (en) | 2010-08-18 |
| CN101806429B true CN101806429B (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910007230XA Expired - Fee Related CN101806429B (en) | 2009-02-13 | 2009-02-13 | Colorful light-emitting device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104508352B (en) * | 2012-07-25 | 2016-11-23 | 英派尔科技开发有限公司 | Back light system |
| CN104051600B (en) * | 2014-06-26 | 2019-01-04 | 江门朗天照明有限公司 | The LED yellow light sources and its manufacture craft of a kind of semiconductors manufacture yellow light room |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883057A (en) * | 2003-09-18 | 2006-12-20 | 日亚化学工业株式会社 | Light emitting device |
| JP2007262357A (en) * | 2006-03-30 | 2007-10-11 | Stanley Electric Co Ltd | Aluminic acid-based blue phosphor and light-emitting device using the same |
| CN200990390Y (en) * | 2006-12-12 | 2007-12-12 | 亿光电子工业股份有限公司 | Whole colour illuminating device |
| CN101207168A (en) * | 2006-12-18 | 2008-06-25 | 亿光电子工业股份有限公司 | White light illuminating device |
-
2009
- 2009-02-13 CN CN200910007230XA patent/CN101806429B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883057A (en) * | 2003-09-18 | 2006-12-20 | 日亚化学工业株式会社 | Light emitting device |
| JP2007262357A (en) * | 2006-03-30 | 2007-10-11 | Stanley Electric Co Ltd | Aluminic acid-based blue phosphor and light-emitting device using the same |
| CN200990390Y (en) * | 2006-12-12 | 2007-12-12 | 亿光电子工业股份有限公司 | Whole colour illuminating device |
| CN101207168A (en) * | 2006-12-18 | 2008-06-25 | 亿光电子工业股份有限公司 | White light illuminating device |
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| Publication number | Publication date |
|---|---|
| CN101806429A (en) | 2010-08-18 |
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