CN1124655C - Manufacture of white and purple light source - Google Patents
Manufacture of white and purple light source Download PDFInfo
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- CN1124655C CN1124655C CN99103561A CN99103561A CN1124655C CN 1124655 C CN1124655 C CN 1124655C CN 99103561 A CN99103561 A CN 99103561A CN 99103561 A CN99103561 A CN 99103561A CN 1124655 C CN1124655 C CN 1124655C
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- light
- trillium
- light source
- present
- phosphor powder
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Abstract
The present invention relates to a method for fabricating white purple light sources. Particularly, the present invention utilizes 430 to 470 nm blue light diodes to excite yttrium aluminum garnet fluorescence powder in order to emit yellow light. Then, the two kinds of light are mixed in order to emit white purple light. If the two kinds of light are properly modulated to optimum conditions in the method of the present invention, white purple light with high brightness can be emitted.
Description
Technical field
The present invention relates to a kind of manufacture method of trillium light source, it is a kind of manufacture method of trillium light-emitting diode, be particularly related to a kind of blue light diode of 430～470nm that utilizes and excite the yttrium-aluminium-garnet phosphor powder to send gold-tinted, again two kinds of light are mixed the method that the back produces trillium light.
Background technology
Light-emitting diode has that volume is little, the luminous efficiency advantages of higher, and can send the light of reddish yellow primary colors so far, therefore be widely used in the technical fields such as display of various digital displays, back light, automobile tail light, traffic lights and big screen.
Before the present invention, it is light-emitting component that company of Siemens (Siemens) and Japan day inferior (Nichia) company discloses with the blue light in its world patent WO97/50132 and WO98/5078 respectively, the part of the light of its ejaculation is sent gold-tinted based on the phosphor powder absorption of yttrium-aluminium-garnet, again by blue and yellow the mixing, can obtain the light-emitting diode of white series, the light-emitting diode of this colour system can replace fluorescent lamp future, promptly be applied to lighting apparatus.
Summary of the invention
In view of tradition display of all kinds commonly used, the acquisition of its color is the glow color that all mixes with the reddish yellow primary colors and get, often needs with three light-emitting diodes tonings, and its cost is higher, does not meet economic benefit, and general desire acquisition trillium light also is not easy.The present invention is on the basis of using Siemens Company and institute of Ri Ya company revealing method, find if suitably allocate the prescription of blue light and phosphor body, can on same element, obtain to send the light-emitting diode of the trillium light of high brightness, improve the shortcoming that is difficult to obtain trillium light at same light-emitting diode.
The object of the present invention is to provide a kind of manufacture method of trillium light source, can cooperate the blue light of wavelength 430～470nm, simply adjust the chemical composition of phosphor body, can obtain to send the light-emitting diode of the trillium light of high brightness.
Method disclosed by the invention is that a kind of prescription of employing is (Y
1-p-xCe
pGd
x)
3Al
5O
12Yellow phosphor powder, with wavelength be the blue light source irradiation of 430～470nm after mixed light produces the trillium light of high brightness, when described blue light operation wavelength changes, can change the prescription of yellow phosphor powder by the molar ratio x that adjusts Gd, obtain trillium light.
Wherein, in the prescription of described yellow phosphor powder, when 0≤p≤0.05,0.2≤x≤0.8 is an optimum formula.
Wherein, described yellow phosphor powder can adopt that solid state reaction, gel method or coprecipitation method are synthetic to be obtained; And employed blue-light source can be InGaN type or SiC type diode.
It is different that the phosphor powder prescription that the present invention adopts and aforementioned Siemens Company and Ri Ya company disclose, in this two companies technology, cerium (Ce) make an addition to contain fixed proportion it (Y, Gd)
3Al
5O
12In, and the present invention replaces yttrium with cerium (Ce), and the change of the mutual replacement amount of mat Y and Gd again cooperates suitable blue light, can form the trillium light of high brightness, and Ri Ya company then need add samarium (Sm) if desire to replace yttrium with cerium, the ability stabilized formulations, and the light that it produced is white light, be not the resulting trillium light of the present invention, and the present invention need not add expensive samarium element, so the present invention has the advantage that reduces cost and new color light source is provided.
Description of drawings
Fig. 1 is (Y among the present invention
0.983-xCe
0.017Gd
x)
3Al
5O
12Phosphor powder is when the X-ray diffraction pattern of x=0.2.
Fig. 2 is that blue-light excited gadolinium (Gd) content (x) of 430nm is 0.2 (Y with the wavelength for the present invention
0.983-xCe
0.017Gd
x)
3Al
5O
12The trillium light spectrogram that phosphor powder produced.
Fig. 3 is that blue-light excited gadolinium (Gd) content (x) of 430～470nm is 0.2～0.8 (Y for the present invention with wavelength
0.983-xCe
0.017Gd
x)
3Al
5O
12Phosphor powder can produce the administrative division map of trillium light.
The preferred embodiment explanation
According to method provided by the invention, at first be the preparation of yellow phosphor powder, can send the yttrium-aluminium-garnet phosphor powder of gold-tinted, synthetic with solid-state reaction, with raw material Y
2O
3, Ce (NO
3)
3, Gd
2O
3And Al (NO
3)
3Weighing back is Y: Ce: Gd: Al=2.949-3x with the mol ratio: form mixtures at 0.051: 3x: 5, wherein, 0.2≤x≤0.8, this mixture is through after the ground and mixed, place 1000 ℃ of air calcinings 24 hours, can form yellow fluorescent powder of the present invention.
Except that above-mentioned solid state reaction, this can send the yttrium-aluminium-garnet phosphor powder of gold-tinted, can also gel method or coprecipitation method formation.
Above-mentioned gained fluorescent powder is through grinding once more, with gained powder and silica gel with weight ratio 0.2～0.3: 1 mixed, (wavelength is on 430～470nm) the wafer to coat the blue light of InGaN or SiC type again, this structure is encapsulated with common light-emitting diodes body technique, feed suitable electric current, can form the light-emitting diode of the purple light that turns white.
Relevant characteristics of the present invention, conjunction with figs. is discussed below
Fig. 1 is (Y during the present invention fills a prescription
0.983-xCe
0.017Gd
x)
3Al
5O
12Phosphor powder is when the X-ray diffraction pattern of x=2, and this figure is the representative collection of illustrative plates when x=2, and other collection of illustrative plates are similar with it.By finding out among the figure, space group with Ia-3d, and lattice constant is the cube structure of about 12 ∑s, give indexing (index), show that prescription of the present invention is single phase, do not contain any impurity phase, and not by samarium (Sm) element, cerium yttrium be can be replaced, single phase and stable fluorescent powder formed.
Fig. 2 is for being that blue-light excited gadolinium (Gd) content (x) of 430nm is 0.2 (Y with the wavelength
0.983-xCe
0.017Gd
x)
3Al
5O
12The trillium light spectrogram that phosphor powder produced has differently greatly with white light collection of illustrative plates that Siemens Company and Ri Ya company are disclosed, and this is the present invention by due to the yttrium-aluminium-garnet fluorescent powder of suitable blue-light excited special formulation.
Fig. 3 is for being that blue-light excited gadolinium (Gd) content (x) of 430～470nm is 0.2～0.8 (Y with wavelength
0.983-xCe
0.017Gd
x)
3Al
5O
12Phosphor powder can produce the administrative division map of trillium light, as known in the figure, if desire is made the light-emitting diode can send trillium light, only need with within this zone or on blue light, cooperate with the phosphor powder of proper formulation, can satisfy the demand.
Claims (3)
1, a kind of manufacture method of trillium light source is characterized in that, adopting a kind of prescription is (Y
1-p-xCe
pGd
x)
3Al
5O
12Yellow phosphor powder, be that the blue light source irradiation of 430～470nm is after mixed light produces trillium light, wherein with wavelength, 0＜p≤0.05,0.2≤x≤0.8 when described blue light operation wavelength changes, can change the prescription of yellow phosphor powder by the molar ratio x that adjusts Gd.
2, the manufacture method of a kind of trillium light source according to claim 1 is characterized in that, described yellow phosphor powder is to adopt solid state reaction, gel method or coprecipitation method to synthesize to obtain.
3, the manufacture method of a kind of trillium light source according to claim 1 is characterized in that, this blue-light source is InGaN type or SiC type diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99103561A CN1124655C (en) | 1999-04-02 | 1999-04-02 | Manufacture of white and purple light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99103561A CN1124655C (en) | 1999-04-02 | 1999-04-02 | Manufacture of white and purple light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1269598A CN1269598A (en) | 2000-10-11 |
| CN1124655C true CN1124655C (en) | 2003-10-15 |
Family
ID=5271331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99103561A Expired - Fee Related CN1124655C (en) | 1999-04-02 | 1999-04-02 | Manufacture of white and purple light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1124655C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334185C (en) * | 2005-12-09 | 2007-08-29 | 天津理工大学 | Rare-earth yttrium-aluminium garnet luminous material and its gas-phase preparing method |
| CN102703078B (en) * | 2012-06-25 | 2015-11-25 | 重庆文理学院 | A kind of Secondary excitation type yellowish green fluorescent powder and preparation method thereof |
| CN102936497B (en) * | 2012-11-08 | 2014-12-31 | 广州有色金属研究院 | Main emission peak changeable and adjustable fluorescent material and preparation method thereof |
-
1999
- 1999-04-02 CN CN99103561A patent/CN1124655C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1269598A (en) | 2000-10-11 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031015 Termination date: 20110402 |