CN101619136B - Organic film for converting spectra and LED chip packaging module - Google Patents
Organic film for converting spectra and LED chip packaging module Download PDFInfo
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- CN101619136B CN101619136B CN200810127623XA CN200810127623A CN101619136B CN 101619136 B CN101619136 B CN 101619136B CN 200810127623X A CN200810127623X A CN 200810127623XA CN 200810127623 A CN200810127623 A CN 200810127623A CN 101619136 B CN101619136 B CN 101619136B
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- organic film
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- inversion spectrum
- inversion
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- MSDMPJCOOXURQD-UHFFFAOYSA-N CC(C)(CCN1c2c3C(C)(C)CC1)c2cc(C=C1c2nc(cccc4)c4[s]2)c3OC1=O Chemical compound CC(C)(CCN1c2c3C(C)(C)CC1)c2cc(C=C1c2nc(cccc4)c4[s]2)c3OC1=O MSDMPJCOOXURQD-UHFFFAOYSA-N 0.000 description 1
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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 discloses an organic film for converting spectra, comprising a transparent gel material and a fluorescent material group, wherein the fluorescent material group is used for converting partial short-wavelength broadband of a blue light source into long-wavelength broadband, and the fluorescent material group has a first fluorescent material and a second fluorescent material which are respectively mixed in the transparent gel material. The first fluorescent material is made of inorganic silicate compound, and the second fluorescent material is made of organic green light adulterant. Hence, thanks to the property of the fluorescent material group of converting partial short-wavelength broadband of the blue light source into long-wavelength broadband, the color rendering and the color of a white light source generated by the LED chip-packaging module utilizing the organic film used for converting the spectra are improved.
Description
Technical field
The present invention relates to a kind of organic film and use the LED chip packaging module of this organic film, relate in particular to and a kind ofly be used for the organic film of inversion spectrum and use the above-mentioned LED chip packaging module that is used for the organic film of inversion spectrum.
Background technology
Photodiode (Light-Emitting Diode, LED) be the semiconductor device, though its size is all very little, its advantage is to produce expeditiously a bright colored emissive source, and has a best monochromatic spike by the transmitting illuminant that photodiode produced.If want to produce white light, then need a color mix method by the emission of diffusion and most photodiodes of merging.
First kind of white light-emitting diode is the white light-emitting diode of two wave length types, its principle that can produce white light is: three produce a transmitting illuminant separately, its wavelength respectively in red, green or blue visible spectrum range (its be respectively red light emitting diodes, green LED, and blue LED) photodiode must put together close to each otherly, the mode by mixed light produces white light source then.Yet each photodiode respectively has a best monochromatic crest, so usually inhomogeneous by the white light that these color mix produced.Also promptly, because the white light that trichromatic transmitting illuminant is produced after mixing can be inhomogeneous, so trichromatic transmitting illuminant can not combine in random mode.
Moreover, another mode that can produce the white light-emitting diode of white light source is the white light-emitting diode of two wave length types, its principle that can produce white light is: " blue led chips is matched yellow inorganic fluorescent powder ", wherein the blue light wavelength that blue LED chip sent is between between the 440nm to 490nm, and yellow inorganic fluorescent powder is subjected to after the blue light illumination, can send xanchromatic fluorescence.Therefore, behind yellow fluorescence and original blue light mixed light, just can obtain required white light.Yet, the luminous efficiency of the white light-emitting diode of this kind two wave length types is lower, and owing to be " two wave length types " (only carrying out mixed light by blue light and gold-tinted), the white light-emitting diode of two wave length types is not so good as the white light-emitting diode of above-mentioned first kind of two wave length type on color rendering and demonstration colour temperature.
In addition, (color rendering index, white light CRI) are the targets that the semiconductor light emitting source is pursued to high color rendering always.Yet not only it has the uneven problem of mixed light to the white light-emitting diode of above-mentioned three-wavelength type, and its color rendering can only reach about 80.In addition, the white light-emitting diode of above-mentioned two wave length types is owing to only carry out mixed light by blue light and gold-tinted, so resulting color rendering is about about 50～80, and the disappearance of color distortion arranged.
Be with, as from the foregoing, above-mentioned second kind of white light-emitting diode that can produce white light source, on reality was used, the disappearance that obviously has color rendering deficiency and color distortion existed.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and is used for the organic film of inversion spectrum and uses the above-mentioned LED chip packaging module that is used for the organic film of inversion spectrum.The present invention is used for the fluorescent material group that part short wavelength broadband with blue-light source is converted to long-wavelength broadband with one and sneaks into a transparent colloid material, to form the above-mentioned organic film that is used for inversion spectrum.In addition, has the characteristic that the part short wavelength broadband of blue-light source is converted to long-wavelength broadband, to promote the color rendering and the color of the white light source that above-mentioned LED chip packaging module produced by this fluorescent material group.
For achieving the above object, according to wherein a kind of scheme of the present invention, provide a kind of organic film that is used for inversion spectrum, it comprises: a transparent colloid material and a fluorescent material group.Wherein, this fluorescent material group is used for the part short wavelength broadband of blue-light source is converted to long-wavelength broadband, and this fluorescent material group has two first fluorescent material and second fluorescent materials that are mixed in respectively in this transparent colloid material.This second fluorescent material is made up of organic green light hotchpotch (organic green dopant); This first fluorescent material is selected from (Me
1-x-yEu
xRe
y)
8Mg
z(SiO
4)
mCl
n, (Me
1-xEu
x) ReS or (Ca
1-x-ySr
xBa
y)
5(PO
4)
3Cl:Eu
2+Gd
2+, wherein Me is calcium, strontium or barium, Re is dysprosium, europium, thulium, magnesium, zinc or samarium, and 0＜x≤0.8,0≤y≤0.4,0≤z≤1.0,1.0≤m≤6.0,0.1≤n≤3.0, the chemical formula of this organic green light hotchpotch is:
And, for achieving the above object, the invention discloses a kind of organic film that is used for inversion spectrum, it is characterized in that, comprising: a transparent colloid material; An and fluorescent material group that is used for the part short wavelength broadband of a preset light sources is converted to long-wavelength broadband, it has two fluorescent materials that are mixed in respectively in this transparent colloid material, wherein this fluorescent material is made up of the organic green light hotchpotch, and the chemical formula of this organic green light hotchpotch is:
And, for achieving the above object, the invention provides the LED chip packaging module that a kind of use is used for the organic film of inversion spectrum, comprise: a substrate, is electrically connected at blue LED and on this substrate and is covered in fluorescent colloid on this blue LED, and the wherein above-mentioned organic film that is used for inversion spectrum is arranged at this fluorescent colloid.
And, for achieving the above object, the invention provides the LED chip packaging module that a kind of use is used for the organic film of inversion spectrum, comprise: a substrate and is electrically connected at the blue LED on this substrate, and the wherein above-mentioned organic film that is used for inversion spectrum is covered in this blue LED.
Therefore, the present invention's organic film of being used for inversion spectrum has following advantage at least:
1, when blue led chips cooperates the above-mentioned organic film that is used for inversion spectrum to use, " part short wavelength broadband " that the above-mentioned organic film that is used for inversion spectrum can be used for blue-light source that this blue led chips is produced is converted to " long-wavelength broadband ", and color rendering can be promoted to 85 whereby.
2, because the above-mentioned organic film that is used for inversion spectrum can be a solid film, therefore, the above-mentioned organic film that is used for inversion spectrum can be arranged on the fluorescent colloid of this LED chip packaging module in the mode that attaches by an adhesion glue.
3, when the above-mentioned organic film that is used for inversion spectrum is mixed into a liquid state earlier, the above-mentioned organic film that is used for inversion spectrum can directly be arranged at this fluorescent colloid in the mode that is shaped by outside former, after waiting this liquid state organic film cooling then, promptly become a solid-state organic film that forms on this fluorescent colloid.
4, the above-mentioned organic film that is used for inversion spectrum can directly be covered in this blue LED.Therefore, the above-mentioned organic film that is used for inversion spectrum can use by direct substitution conventional fluorescent colloidal.
Description of drawings
Fig. 1 is used for the schematic side view of the organic film of inversion spectrum for the present invention;
Fig. 2 is the side-looking diagrammatic cross-section of first embodiment of LED chip packaging module of the present invention;
Fig. 3 is the side-looking diagrammatic cross-section of second embodiment of LED chip packaging module of the present invention;
Fig. 4 is the side-looking diagrammatic cross-section of the 3rd embodiment of LED chip packaging module of the present invention; And
Fig. 5 cooperates the spectrogram (spectrogram) that blue-light source produced for the organic film that the present invention is used for inversion spectrum.
Wherein, Reference numeral:
[organic film that is used for inversion spectrum]
F: the organic film that is used for inversion spectrum
1: the transparent colloid material
2: fluorescent material group
20A: first fluorescent material
20B: second fluorescent material
[LED chip packaging module]
S: substrate
B: blue LED
P: fluorescent colloid
A: adhesion glue
F1: the organic film that is used for inversion spectrum
F2: the organic film that is used for inversion spectrum
F3: the organic film that is used for inversion spectrum
Embodiment
See also shown in Figure 1ly, it is used for the schematic side view of the organic film of inversion spectrum for the present invention.By among above-mentioned Fig. 1 as can be known, the invention provides a kind of organic film F that is used for inversion spectrum, it comprises: a transparent colloid material 1 and a fluorescent material group 2, wherein this fluorescent material group 2 is used for " the part short wavelength broadband " of a preset light sources is converted to " long-wavelength broadband ", with the present invention, this preset light sources can be blue-light source, yet this blue-light source just is used for for example its non-color that is used for limiting light source used in the present invention.
Wherein, this transparent colloid material 1 can be made up of any transparent colloid, and for example: this transparent colloid material 1 can be become by Resins, epoxy (epoxy) or silica gel (silicon); Perhaps this transparent colloid material 1 can by Resins, epoxy (epoxy) and silica gel (silicon) mix mutually the institute form.
Moreover, the fluorescent material group 2 that the above-mentioned part short wavelength broadband that is used for blue-light source is converted to long-wavelength broadband has two the first fluorescent material 20A and the second fluorescent material 20B that are mixed in respectively in this transparent colloid material 1, wherein this first fluorescent material 20A is made up of inorganic silicic acid salt compound (inorganicSilicate compound), and this second fluorescent material 20B is made up of organic green light hotchpotch (organic green dopant).
With the first fluorescent material 20A, this inorganic silicic acid salt compound is optional from (Me
1-x-yEu
xRe
y)
8Mg
z(SiO
4)
mCl
n, (Me
1-xEu
x) ReS and (Ca
1-x-ySr
xBa
y)
5(PO
4)
3Cl:Eu
2+Gd
2+The group that is formed one of them, wherein Me be selected from group that calcium, strontium, barium forms one of them, Re be selected from group that dysprosium, europium, thulium, magnesium, zinc, samarium form one of them, 0＜x≤0.8,0≤y≤0.4,0≤z≤1.0,1.0≤m≤6.0,0.1≤n≤3.0.Yet, above-mentionedly just being used for for example for defining of this first fluorescent material 20A, the present invention can use any inorganic silicic acid salt compound along with needed color rendering of user and color.
With the second fluorescent material 20B, this organic green light hotchpotch is made up of carbon (carbon), hydrogen (hydrogen), nitrogen (nitrogen), oxygen (oxygen) and sulphur (sulfur).With most preferred embodiment, the molecular formula of this organic green light hotchpotch is: C
26H
26N
2O
2S, and in above-mentioned carbon, hydrogen, nitrogen, oxygen and the sulphur, carbon account for 72.5%, hydrogen accounts for 6.1%, nitrogen accounts for 6.5%, oxygen account for 7.4% and sulphur account for 7.5%.In addition, the chemical formula of this organic green light hotchpotch is:
Moreover, with the blending ratio of this transparent colloid material 1, this first fluorescent material 20A and this second fluorescent material 20B:
One, in the middle of this transparent colloid material 1, this first fluorescent material 20A and this second fluorescent material 20B, this transparent colloid material 1 shared percentage range is 0.1～99.895%.
Two, in the middle of this transparent colloid material 1, this first fluorescent material 20A and this second fluorescent material 20B, the shared percentage range of this first fluorescent material 20A is 0.1～5%.
Three, in the middle of this transparent colloid material 1, this first fluorescent material 20A and this second fluorescent material 20B, the shared percentage range of this second fluorescent material 20B is 0.001～5%.
In addition, the optimum mixture ratio example of above-mentioned this transparent colloid material 1, this first fluorescent material 20A and this second fluorescent material 20B is: this transparent colloid material (is example with silica gel (silicon)) 1 accounts for 95%, this first fluorescent material (is example with the inorganic silicic acid salt compound) 20A accounts for 4.99%, and this second fluorescent material (is example with the organic green light hotchpotch) 20B accounts for 0.01%.
Moreover, the fluorescent material group 2 that the above-mentioned part short wavelength broadband that is used for blue-light source is converted to long-wavelength broadband also can only be mixed in this second fluorescent material 20B in this transparent colloid material 1, this kind assembled scheme also can be reached the effect of inversion spectrum, and wherein this second fluorescent material 20B is made up of organic green light hotchpotch (organic green dopant).
See also shown in Figure 2ly, it is the side-looking diagrammatic cross-section of first embodiment of LED chip packaging module of the present invention.By among the above-mentioned figure as can be known, the invention provides a kind of LED chip packaging module (first embodiment), it comprises: a substrate S, is electrically connected at blue LED B and on this substrate S and is covered in fluorescent colloid P on this blue LED B, wherein this fluorescent colloid P sneaks into transparent colloid by fluorescent material and is formed, and this fluorescent colloid P has the combination of fluorescent layer and two kinds of functions of encapsulated layer.Because an organic film F1 who is used for inversion spectrum is a solid film, the therefore above-mentioned organic film F1 that is used for inversion spectrum can be arranged on this fluorescent colloid P in the mode that attaches by an adhesion glue A.
See also shown in Figure 3ly, it is the side-looking diagrammatic cross-section of second embodiment of LED chip packaging module of the present invention.By among the above-mentioned figure as can be known, the invention provides a kind of LED chip packaging module (second embodiment), it comprises: a substrate S, is electrically connected at blue LED B and on this substrate S and is covered in fluorescent colloid P on this blue LED B, wherein an organic film F2 who is used for inversion spectrum is provided with and is incorporated into this fluorescent colloid P by the mode that is shaped, and the mode of above-mentioned shaping can comprise: immersion, coating, printing, spraying or any forming mode.Certainly, the mode of above-mentioned shaping just is used for for example, and it is non-in order to limit the present invention.
Therefore, by above-mentioned first embodiment and second embodiment as can be known, the present invention is used for the organic film (F1, F2) of inversion spectrum can be directly or be arranged at this fluorescent colloid P indirectly.For example: when the above-mentioned organic film F1 that is used for inversion spectrum was made into a solid film earlier, the above-mentioned organic film F1 that is used for inversion spectrum can be arranged at this fluorescent colloid P indirectly by this glue A that adheres; Perhaps, when the above-mentioned organic film F2 that is used for inversion spectrum is mixed into a liquid state earlier, the above-mentioned organic film F2 that is used for inversion spectrum can directly be arranged at this fluorescent colloid P in the mode that is shaped by outside former, after waiting this liquid state organic film F2 cooling, promptly become a solid-state organic film F2 who forms on this fluorescent colloid P.
See also shown in Figure 4ly, it is the side-looking diagrammatic cross-section of the 3rd embodiment of LED chip packaging module of the present invention.By among the above-mentioned figure as can be known, the invention provides a kind of LED chip packaging module (the 3rd embodiment), it comprises: a substrate S and is electrically connected at the blue LED B on this substrate, and wherein an organic film F3 who is used for inversion spectrum directly is covered in this blue LED B.Therefore, the above-mentioned organic film F3 that is used for inversion spectrum can use by direct substitution conventional fluorescent colloidal.
See also shown in Figure 5ly, it cooperates the spectrogram (spectrogram) that blue-light source produced for the organic film that the present invention is used for inversion spectrum.By among the above-mentioned figure as can be known, be used for the use of the organic film of inversion spectrum by the present invention, " the part short wavelength broadband " that can be used to blue-light source that this blue led chips is produced is converted to " long-wavelength broadband ", whereby to promote required color rendering.In other words, be used for the organic film of inversion spectrum and cooperating of blue led chips by the present invention, make that the intensity of the part long-wavelength broadband that produced by conventional fluorescent powder and blue LED originally (approximately from 500 to 700nm) can effectively be promoted, wherein nethermost curve is the intensity of the wavelength of prior art, be the transparent colloid material 1 that has added different ratios toward the curve that rises in regular turn, behind the first fluorescent material 20A and the second fluorescent material 20B, the situation, the particularly adding proportion of the second fluorescent material 20B that increases from 500 to 700nm the Wavelength strength influence that causes above-mentioned Wavelength strength to increase is the most obvious approximately.
Yet the application mode of the above-mentioned relevant organic film that is used for inversion spectrum is non-to limit the present invention, and the use of any such as utilization " blue led chips cooperates the above-mentioned organic film that is used for inversion spectrum " all is the category that the present invention protected.
In sum, the present invention is used for the fluorescent material group that part short wavelength broadband with blue-light source is converted to long-wavelength broadband with one to sneak into a transparent colloid material, to form the above-mentioned organic film that is used for inversion spectrum.In addition, has the characteristic of " the part short wavelength broadband of blue-light source is converted to long-wavelength broadband ", to promote the color rendering and the color of the white light source that above-mentioned LED chip packaging module produced by this fluorescent material group.Therefore, the present invention's organic film of being used for inversion spectrum has following advantage at least:
1, when blue led chips cooperates the above-mentioned organic film that is used for inversion spectrum to use, " part short wavelength broadband " that the above-mentioned organic film that is used for inversion spectrum can be used for blue-light source that this blue led chips is produced is converted to " long-wavelength broadband ", and color rendering can be promoted to 85 whereby.
2, as shown in Figure 2, because the above-mentioned organic film F1 that is used for inversion spectrum is a solid film, therefore the above-mentioned organic film F1 that is used for inversion spectrum can pass through this adhesion glue A, is arranged on the fluorescent colloid P of this LED chip packaging module in the mode that attaches.
3, as shown in Figure 3, when the above-mentioned organic film F2 that is used for inversion spectrum is mixed into a liquid state earlier, the above-mentioned organic film F2 that is used for inversion spectrum can directly be arranged at this fluorescent colloid P in the mode that is shaped by outside former, after waiting this liquid state organic film F2 cooling then, promptly become a solid-state organic film F2 who forms on this fluorescent colloid P.
4, as shown in Figure 4, the above-mentioned organic film F3 that is used for inversion spectrum directly is covered in this blue LED B.Therefore, the above-mentioned organic film F3 that is used for inversion spectrum can use by direct substitution conventional fluorescent colloidal.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (14)
1. an organic film that is used for inversion spectrum is characterized in that, comprising:
One transparent colloid material; And
One is used for the part short wavelength broadband of a preset light sources is converted to the fluorescent material group of long-wavelength broadband, it has two first fluorescent material and second fluorescent materials that are mixed in respectively in this transparent colloid material, and wherein this second fluorescent material is made up of the organic green light hotchpotch;
This first fluorescent material is selected from (Me
1-x-yEu
xRe
y)
8Mg
z(SiO
4)
mCl
n, (Me
1-xEu
x) ReS or (Ca
1-x-ySr
xBa
y)
5(PO
4)
3Cl:Eu
2+Gd
2+, wherein Me is calcium, strontium or barium, Re is dysprosium, europium, thulium, magnesium, zinc or samarium, and 0＜x≤0.8,0≤y≤0.4,0≤z≤1.0,1.0≤m≤6.0,0.1≤n≤3.0, the chemical formula of this organic green light hotchpotch is:
2. the organic film that is used for inversion spectrum according to claim 1 is characterized in that, this preset light sources is a blue-light source.
3. the organic film that is used for inversion spectrum according to claim 1 is characterized in that, this transparent colloid material is selected from Resins, epoxy, silica gel or by Resins, epoxy and the mutual blended composition of silica gel.
4. the organic film that is used for inversion spectrum according to claim 1 is characterized in that, in the middle of this transparent colloid material, this first fluorescent material and this second fluorescent material, the shared percentage range of this transparent colloid material is 0.1～99.895%.
5. the organic film that is used for inversion spectrum according to claim 1 is characterized in that, in the middle of this transparent colloid material, this first fluorescent material and this second fluorescent material, the shared percentage range of this first fluorescent material is 0.1～5%.
6. the organic film that is used for inversion spectrum according to claim 1 is characterized in that, in the middle of this transparent colloid material, this first fluorescent material and this second fluorescent material, the shared percentage range of this second fluorescent material is 0.001～5%.
7. one kind is used the LED chip packaging module that is used for the organic film of inversion spectrum according to claim 1, it is characterized in that, comprise: a substrate, is electrically connected at blue LED and on this substrate and is covered in fluorescent colloid on this blue LED, and the wherein above-mentioned organic film that is used for inversion spectrum is arranged at this fluorescent colloid.
8. LED chip packaging module according to claim 7 is characterized in that, the above-mentioned organic film that is used for inversion spectrum is a solid film, and the therefore above-mentioned organic film that is used for inversion spectrum is arranged at this fluorescent colloid by the mode that attaches.
9. LED chip packaging module according to claim 7 is characterized in that, the above-mentioned organic film that is used for inversion spectrum is arranged at this fluorescent colloid by the mode that is shaped.
10. LED chip packaging module according to claim 9 is characterized in that, the mode of above-mentioned shaping comprises: soak, be coated with, print or spraying.
11. one kind is used the LED chip packaging module that is used for the organic film of inversion spectrum according to claim 1, it is characterized in that, comprise: a substrate and is electrically connected at the blue LED on this substrate, and the wherein above-mentioned organic film that is used for inversion spectrum is covered in this blue LED.
12. an organic film that is used for inversion spectrum is characterized in that, comprising:
One transparent colloid material; And
One is used for the part short wavelength broadband of a preset light sources is converted to the fluorescent material group of long-wavelength broadband, and it has two fluorescent materials that are mixed in respectively in this transparent colloid material, and wherein this fluorescent material is made up of the organic green light hotchpotch;
The chemical formula of this organic green light hotchpotch is:
13. the organic film that is used for inversion spectrum according to claim 12 is characterized in that, this preset light sources is a blue-light source.
14. the organic film that is used for inversion spectrum according to claim 12 is characterized in that, this transparent colloid material is selected from Resins, epoxy, silica gel or by Resins, epoxy and the mutual blended composition of silica gel.
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| CN101619136B true CN101619136B (en) | 2011-11-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002011209A2 (en) * | 2000-08-01 | 2002-02-07 | Emagin Corporation | Method of patterning color changing media for organic light emitting diode display devices |
| CN1515623A (en) * | 1996-09-20 | 2004-07-28 | Wavelength exchange pouring material, its application and preparation method | |
| CN1679178A (en) * | 2002-09-02 | 2005-10-05 | 帝希欧有限公社 | White light emitting diode and its method of making |
| CN101140967A (en) * | 2006-09-08 | 2008-03-12 | 晶元光电股份有限公司 | High efficient phosphor convert light emitter and its making process |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515623A (en) * | 1996-09-20 | 2004-07-28 | Wavelength exchange pouring material, its application and preparation method | |
| WO2002011209A2 (en) * | 2000-08-01 | 2002-02-07 | Emagin Corporation | Method of patterning color changing media for organic light emitting diode display devices |
| CN1679178A (en) * | 2002-09-02 | 2005-10-05 | 帝希欧有限公社 | White light emitting diode and its method of making |
| CN101140967A (en) * | 2006-09-08 | 2008-03-12 | 晶元光电股份有限公司 | High efficient phosphor convert light emitter and its making process |
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