CN1677695A - Weight-light ligh-emitting diode unit - Google Patents
Weight-light ligh-emitting diode unit Download PDFInfo
- Publication number
- CN1677695A CN1677695A CNA2004100299147A CN200410029914A CN1677695A CN 1677695 A CN1677695 A CN 1677695A CN A2004100299147 A CNA2004100299147 A CN A2004100299147A CN 200410029914 A CN200410029914 A CN 200410029914A CN 1677695 A CN1677695 A CN 1677695A
- Authority
- CN
- China
- Prior art keywords
- white light
- emitting diode
- light emitting
- unit
- green
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 15
- 239000004065 semiconductor Substances 0.000 claims description 5
- 229910004283 SiO 4 Inorganic materials 0.000 claims description 4
- 229910019990 cerium-doped yttrium aluminum garnet Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims 1
- 238000009877 rendering Methods 0.000 abstract description 12
- 239000000758 substrate Substances 0.000 abstract description 4
- 229910052909 inorganic silicate Inorganic materials 0.000 abstract 1
- 238000000295 emission spectrum Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001025261 Neoraja caerulea Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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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- Led Device Packages (AREA)
- Luminescent Compositions (AREA)
Abstract
White light LED comprises following parts: a substrate, a blue light LED on the substrate, a mixed fluorophor including red, green, and yellow fluorophors, which are covered outer side of blue light LED. Red fluorophor can be CaS : Eu or SrS : Eu; yellow fluorophor can be YAG : Ce or TbAG :Ce, and green fluorophor can be SrGa2S4 : Eu or Ca8EuMnMg(SiO4)4 Cl12. High color rendering white light is obtained by mixing red, green and yellow lights with blue light from blue light LED.
Description
Technical field
The present invention relates to a kind of white light emitting diode unit, relate in particular to a kind of white light emitting diode unit that has luminous efficiency and color rendering concurrently.
Background technology
White light is the mixed light of many colors, can is the white light person by human eye perceives, and comprise the mixed light of wavelength more than two kinds at least.For example, when human eye is subjected to the stimulation of red, blue, green glow simultaneously or when receiving the stimulation of blue light and gold-tinted simultaneously, all can be felt as white light.Therefore, can be according to this kind principle, make a semiconductor light-emitting apparatus that can send white light.The manufacture division of existing white semiconductor light-emitting device is as follows.
It is three red blue green LEDs of material with gallium phosphide (GaP) that first kind of mode is to use with AlGaInP (AlInGaP), InGaN (InGaN), and the electric current of each light-emitting diode is passed through in control, and makes it send red, green and blue light respectively.These three LED crystal particle are disposed in the same bulb (lamp), and utilize lens that the light of three kinds of colors is mixed and produce white light.Shown in Figure 1A, on base material 10, can settle red light emitting diodes LR, green LED LG and blue LED LB, and cover packing colloid 11 in the above to do the protection purposes.The luminous frequency spectrum of existing for this reason white light unit shown in Figure 1B can be found out red light emitting diodes LR, green LED LG and blue LED LB emission spectrum central compartment and be not broad the distribution.Form because white light is the spectrum of continuous distribution between 400-720nm, it is lower therefore should to have the white light emitting diode color saturation now.Though human eyes can be ignored this phenomenon and only see white light, under the sensing of the higher optics detection device of some precision, for example video camera or camera etc., (color rendering property) is substantially still on the low side for its color rendering.Moreover when different photochromic light-emitting diodes wherein one when breaking down, can't obtain normal white light, and in general, luminous efficiency is relatively poor.
The second way is the technology that chemical (Nichia Chemical) company in Asia of Japanese day in 1996 develops, and it is to cooperate the Yttrium aluminium garnet (YAG) type phosphor powder that is stimulated and can sends gold-tinted with the InGaN blue light-emitting diode, makes a white light source.Because this kind mode only must be used one group of light-emitting diode chip for backlight unit, can reduce manufacturing cost significantly.Referring to Fig. 2, the schematic diagram of prior art can be put blue LED LB on base material 10 for this reason, and covers yellow fluorophor PY in the above, absorbing blue LED LB and to send gold-tinted, and becomes white light with blue light.Its phosphor powder modulation technique of arranging in pairs or groups has been attained maturation now, present so have commodity, yet this white light emitting diode color rendering is poorer.
Summary of the invention
Main purpose of the present invention is to provide a kind of white light emitting diode unit that has luminous efficiency and color rendering concurrently, to solve the shortcoming of above-mentioned existing white light emitting diode.
For achieving the above object, the invention provides a kind of white light emitting diode unit, it comprises a base material, for example can be an insulating substrate; At least one blue LED, be positioned on the base material, and can be made for nitride-based compound semiconductor; One mixing phosphor comprises red-emitting phosphors, green-emitting phosphor and yellow fluorophor; And be coated on outside this blue LED.This red-emitting phosphors can adopt Cas:Eu or SrS:Eu; Yellow silver-colored light body can adopt YAG:Ce or TbAG:Ce; And green-emitting phosphor can adopt SrGa
2S
4: Eu or Ca
8EuMnMg (SiO
4)
4C
12, blend high-color rendering white-light with the blue light that cooperates blue LED.In addition, this white light emitting diode unit can be surface mounting luminous diode unit or bulb type light emitting diode.The emission wavelength of this blue LED is 400-490nm.And this red-emitting phosphors, green-emitting phosphor and yellow fluorophor can be allocated according to certain proportion, to change the light emission color temperature of white light emitting diode unit.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Figure 1A is the schematic diagram of existing white light unit;
Figure 1B is the spectrogram of existing white light unit;
Fig. 2 is the schematic diagram of another existing white light unit;
Fig. 3 is the schematic diagram according to a preferred embodiments of the present invention;
Fig. 4 A is the schematic diagram according to another preferred embodiments of the present invention;
Fig. 4 B is the spectrogram of Fig. 4 A assembly.
Embodiment
As shown in Figure 3, be schematic diagram according to a kind of white light emitting diode unit 2 of preferred embodiments of the present invention.This white light emitting diode comprises a base material 20, position at the blue LED LB on the base material 20, and red-emitting phosphors PR and the green-emitting phosphor PG of position on blue LED LB, this red-emitting phosphors PR and green-emitting phosphor PG can absorb the blue light of blue LED LB and send ruddiness and green glow respectively, and become white light with the blue light of blue LED LB.
In the redness and green-emitting phosphor of above-mentioned explanation, this red-emitting phosphors can adopt Cas:Eu or SrS:Eu; Yellow silver-colored light body can adopt YAG:Ce or TbAG:Ce; And green-emitting phosphor can adopt SrGa
2S
4: Eu or Ca
8EuMnMg (SiO
4)
4C
12But notice still has other available fluorophor except above-mentioned fluorophor, but does not represent this case invention only to limit the use of above-mentioned fluorophor, has comprised that also other can be by blue light wavelength (400-490nm) scope excited fluorescent body material.
See also Fig. 4 A, be schematic diagram according to the white light emitting diode unit 2 of another preferred embodiments of the present invention.This white light emitting diode unit 2 comprises a base material 20 (for example can be an insulating substrate), position at the blue LED LB on the base material 20 (can be made for nitride-based compound semiconductor), and redness, green and the yellow mixture fluorophor PRG of position on blue LED LB, and wherein this mixing phosphor RGY comprises the mixing resultant of red-emitting phosphors PR, green-emitting phosphor PG and yellow fluorophor PY.
Be provided with conductor part (not icon) in above-mentioned white light emitting diode unit 2, the electrical connections (not icon) that negative electrode and the anode of blue LED LB can be connected to base material 20 is to supply power on the blue LED LB.Yet the electrode interconnection technique relevant for blue LED LB is a prior art, is not emphasis of the present invention, does not therefore repeat them here.Moreover the white light emitting diode unit of above-mentioned icon is the surface installing type encapsulation, but must know that this white light emitting diode unit also can encapsulate as bulb type for other form encapsulation.
When above-mentioned blue-light LED chip LB is proficient in electric current and during the outgoing blue ray, can excites red-emitting phosphors PR, green-emitting phosphor PG and yellow fluorophor PY among the described mixing phosphor RGY, and produce red light, green light and sodium yellow emergent ray.
See also Fig. 4 B, emission spectrum for the white light emitting diode unit 2 of preferred embodiments of the present invention, be respectively the spectrum of blue-light-emitting LB, the emission spectrum of green-emitting phosphor PG, the emission spectrum of yellow fluorophor PY and the emission spectrum of red-emitting phosphors PR from left to right, spectrum (referring to Figure 1B) with prior art, the emission spectrum of white light emitting diode of the present invention unit 2 includes more wide visible light wave range, therefore has preferable color rendering.Moreover, because generally speaking the emission spectrum of fluorophor is than the emission spectrum broadness of light-emitting diode, because can reach better color rendering.
Because of simple when using the sodium yellow fluorophor color rendering of its white light not good, therefore in fluorescent glue, add red, green light fluorophor to increase its color rendering.And with red, yellow, green-emitting phosphor according to proper proportion mix do allotment get final product white light or transfer various colour temperatures, coloured light.
Among redness of the present invention, green and the yellow fluorophor PGY that mixes, this red-emitting phosphors can adopt Cas:Eu or SrS:Eu; Yellow silver-colored light body can adopt YAG:Ce or TbAG:Ce; And green-emitting phosphor can adopt SrGa
2S
4: Eu or Ca
8EuMnMg (SiO
4)
4C
12But notice still has other available fluorophor except above-mentioned fluorophor, but does not represent the present invention only to limit the use of above-mentioned fluorophor, has comprised that also other can be by blue light wavelength (400-490nm) scope excited fluorescent body material.
In sum, white light emitting diode of the present invention unit can have luminous efficiency and color rendering concurrently.
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 range of the appended claim of the present invention.
Claims (10)
1, a kind of white light emitting diode unit is characterized in that, comprises:
One base material;
At least one blue LED is positioned on the base material;
One mixing phosphor comprises red-emitting phosphors, green-emitting phosphor and yellow fluorophor; And be coated on outside this blue LED.
2, white light emitting diode according to claim 1 unit is characterized in that this red-emitting phosphors can adopt Cas:Eu or SrS:Eu.
3, white light emitting diode according to claim 1 unit is characterized in that this green-emitting phosphor can adopt SrGa
2S
4: Eu or Ca
8EuMnMg (SiO
4)
4C
12
4, white light emitting diode according to claim 1 unit is characterized in that this yellow fluorophor can adopt YAG:Ce or TbAG:Ce.
5, white light emitting diode according to claim 1 unit is characterized in that this white light emitting diode unit is the surface mounting luminous diode unit.
6, white light emitting diode according to claim 1 unit is characterized in that this white light emitting diode unit is the bulb type light emitting diode.
7, white light emitting diode according to claim 1 unit is characterized in that this base material is an insulating material.
8, white light emitting diode according to claim 1 unit is characterized in that this blue LED is that nitride-based compound semiconductor is made.
9, white light emitting diode according to claim 1 unit is characterized in that the emission wavelength of this blue LED is 400-490nm.
10, white light emitting diode according to claim 1 unit is characterized in that this red-emitting phosphors, green-emitting phosphor and yellow fluorophor can be allocated according to certain proportion, to change the light emission color temperature of white light emitting diode unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100299147A CN100341163C (en) | 2004-03-29 | 2004-03-29 | Weight-light ligh-emitting diode unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100299147A CN100341163C (en) | 2004-03-29 | 2004-03-29 | Weight-light ligh-emitting diode unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1677695A true CN1677695A (en) | 2005-10-05 |
| CN100341163C CN100341163C (en) | 2007-10-03 |
Family
ID=35050094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100299147A Expired - Lifetime CN100341163C (en) | 2004-03-29 | 2004-03-29 | Weight-light ligh-emitting diode unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100341163C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014675A1 (en) * | 2006-07-28 | 2008-02-07 | Versitech Limited | Method of making white light leds and continuously color tunable leds |
| CN101195700B (en) * | 2006-12-08 | 2011-04-27 | 宏齐科技股份有限公司 | Light emitting diode frame body component and manufacturing method thereof |
| CN101521192B (en) * | 2008-02-27 | 2011-07-13 | 华兴电子工业股份有限公司 | Package structure of light emitting diode and the packaging method thereof |
| CN102244185A (en) * | 2011-07-19 | 2011-11-16 | 彩虹集团公司 | White light LED (light emitting diode) with high color rendering index, high light efficiency and low color temperature and preparation method thereof |
| WO2012009919A1 (en) | 2010-07-20 | 2012-01-26 | 上海亚明灯泡厂有限公司 | Led integrated packaging light source module |
| CN101482235B (en) * | 2009-01-22 | 2012-05-30 | 深圳市聚飞光电股份有限公司 | Color temperature-adjustable high-color development LED lamp and manufacturing method thereof |
| US8384092B2 (en) | 2007-08-30 | 2013-02-26 | Nichia Corporation | Light emitting device |
| CN104241507A (en) * | 2014-09-18 | 2014-12-24 | 晶科电子（广州）有限公司 | Wide-color-gamut LED light-emitting device and backlight module with same |
| CN106398688A (en) * | 2016-09-05 | 2017-02-15 | 中山大学 | Blue-light fluorescent powder in LED device for treatment of neonatal jaundice, and synthetic method thereof |
| CN108732818A (en) * | 2018-05-29 | 2018-11-02 | 武汉华星光电技术有限公司 | The production method of backlight module, display device and backlight module |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000285718A (en) * | 1999-03-29 | 2000-10-13 | Rohm Co Ltd | Surface light source |
| GB9915589D0 (en) * | 1999-07-02 | 1999-09-01 | Smithkline Beecham Plc | Novel compounds |
| JP3993854B2 (en) * | 2001-10-01 | 2007-10-17 | 松下電器産業株式会社 | Semiconductor light emitting element and light emitting device using the same |
| TW518773B (en) * | 2001-12-31 | 2003-01-21 | Solidlite Corp | Manufacturing method of white LED |
| CN1266776C (en) * | 2002-01-21 | 2006-07-26 | 诠兴开发科技股份有限公司 | Method for making white colore LED |
| TW563261B (en) * | 2002-06-07 | 2003-11-21 | Solidlite Corp | A method and of manufacture for tri-color white LED |
-
2004
- 2004-03-29 CN CNB2004100299147A patent/CN100341163C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014675A1 (en) * | 2006-07-28 | 2008-02-07 | Versitech Limited | Method of making white light leds and continuously color tunable leds |
| CN101195700B (en) * | 2006-12-08 | 2011-04-27 | 宏齐科技股份有限公司 | Light emitting diode frame body component and manufacturing method thereof |
| US8648523B2 (en) | 2007-08-30 | 2014-02-11 | Nichia Corporation | Light emitting device including light emitting element and phosphor |
| US8384092B2 (en) | 2007-08-30 | 2013-02-26 | Nichia Corporation | Light emitting device |
| CN101785121B (en) * | 2007-08-30 | 2013-04-03 | 日亚化学工业株式会社 | Light emitting device |
| CN101521192B (en) * | 2008-02-27 | 2011-07-13 | 华兴电子工业股份有限公司 | Package structure of light emitting diode and the packaging method thereof |
| CN101482235B (en) * | 2009-01-22 | 2012-05-30 | 深圳市聚飞光电股份有限公司 | Color temperature-adjustable high-color development LED lamp and manufacturing method thereof |
| WO2012009919A1 (en) | 2010-07-20 | 2012-01-26 | 上海亚明灯泡厂有限公司 | Led integrated packaging light source module |
| CN102244185A (en) * | 2011-07-19 | 2011-11-16 | 彩虹集团公司 | White light LED (light emitting diode) with high color rendering index, high light efficiency and low color temperature and preparation method thereof |
| CN104241507A (en) * | 2014-09-18 | 2014-12-24 | 晶科电子（广州）有限公司 | Wide-color-gamut LED light-emitting device and backlight module with same |
| CN106398688A (en) * | 2016-09-05 | 2017-02-15 | 中山大学 | Blue-light fluorescent powder in LED device for treatment of neonatal jaundice, and synthetic method thereof |
| CN106398688B (en) * | 2016-09-05 | 2018-10-09 | 中山大学 | A kind of blue light fluorescent powder and its synthetic method treated applied to icterus neonatorum disease in LED component |
| CN108732818A (en) * | 2018-05-29 | 2018-11-02 | 武汉华星光电技术有限公司 | The production method of backlight module, display device and backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100341163C (en) | 2007-10-03 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20071003 |