CN101414604B - Light-emitting diode - Google Patents
Light-emitting diode Download PDFInfo
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- CN101414604B CN101414604B CN2008102176794A CN200810217679A CN101414604B CN 101414604 B CN101414604 B CN 101414604B CN 2008102176794 A CN2008102176794 A CN 2008102176794A CN 200810217679 A CN200810217679 A CN 200810217679A CN 101414604 B CN101414604 B CN 101414604B
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- chip
- light
- emitting diode
- fluorescent powder
- blue
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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Abstract
The invention is applicable to the LED illumination field, and provides an LED. The LED comprises a cavity, a blue light chip, yellow fluorescent powder, green fluorescent powder and a first chip which is connected in series with the blue light chip; the blue light chip and the first chip are fixed on the bottom of the cavity; the yellow fluorescent powder and the green fluorescent powder are mixed into fluorophor by glue water, and the fluorophor is filled into the cavity. In the LED, the blue light chip and the first chip connected in series with the blue light chip are combined with the green fluorescent powder and the yellow fluorescent powder to form four consecutive peak wavelengths, which improves the color rendering index of the LED.
Description
Technical field
The invention belongs to the LED lighting field, relate in particular to a kind of light-emitting diode.
Background technology
Prior art 2 is to adopt three wavelengh white light light-emitting diode, uses the blue-light LED chip of wavelength as 430nm～480nm, and the composite fluorophor of excitated red fluorescent powder and green emitting phosphor produces ruddiness and green glow, again with original blue light generation white light.Yet,, cause white brightness lower, poor practicability because the ruddiness launching efficiency is low.
Prior art 3 adopts blue-light LED chip and the common excitated red fluorescent powder of green light LED chip, produces the three-wavelength white light, yet, exist the ruddiness launching efficiency low equally, cause white brightness lower, the problem of poor practicability.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of light-emitting diode that can produce the white light of high color rendering index (CRI).
The embodiment of the invention is achieved in that a kind of light-emitting diode, comprises a chamber, and described light-emitting diode also comprises:
Blue chip, yellow fluorescent powder, green emitting phosphor and first chip of connecting with described blue chip; Four light that peak wavelength is continuous of light composition that light that the described blue chip and first chip send and described yellow fluorescent powder and green emitting phosphor are excited and produce;
Described blue chip and described first chip are fixed in described cavity bottom; Described first chip is red light chips or amber optical chip,
Described yellow fluorescent powder and described green emitting phosphor are mixed into fluorophor by glue and are filled in the described chamber.
First chip that the light-emitting diode that the embodiment of the invention provides adopts blue chip, connects with blue chip, combining with green fluorescent material and yellow fluorescent powder are formed four continuous peak wavelengths, have improved the color rendering index of LED.
Description of drawings
Fig. 1 is the light-emitting diode structure figure that first embodiment of the invention provides;
Fig. 2 A is the circuit diagram of a chip unit providing of first embodiment of the invention;
Fig. 2 B is the circuit diagram of a plurality of chip unit parallel connections of providing of first embodiment of the invention;
Fig. 2 C is the circuit diagram of a plurality of chip units series connection that provides of first embodiment of the invention;
Fig. 3 is the light-emitting diode structure figure that second embodiment of the invention provides;
Fig. 4 A is the circuit diagram of a chip unit providing of second embodiment of the invention;
Fig. 4 B is the circuit diagram of a plurality of chip unit parallel connections of providing of second embodiment of the invention;
Fig. 4 C is the circuit diagram of a plurality of chip units series connection that provides of second embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
First chip that the light-emitting diode that the embodiment of the invention provides adopts blue chip, connects with blue chip, combining with green fluorescent material and yellow fluorescent powder are formed four continuous peak wavelengths, have improved the color rendering index of LED.
The light-emitting diode that the embodiment of the invention provides comprises a hollow chamber, also comprises blue chip, first chip, yellow fluorescent powder and the green emitting phosphor of connecting with blue chip; The blue chip and first chip are fixed in cavity bottom; Yellow fluorescent powder and green emitting phosphor are mixed into fluorophor by glue and are filled in the chamber.
As one embodiment of the present of invention, first chip can be red light chips, also can be the amber optical chip, selects the first different chips according to different application scenarios; Select for use the light-emitting diode of red light chips to be mainly used in museum, shop, room lighting, NB, places such as LCD TV; Select for use the light-emitting diode of amber optical chip then to be mainly used in billboard, LED street lamp etc.
The light-emitting diode structure that first embodiment of the invention provides for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 1, and details are as follows.
Light-emitting diode has a hollow chamber, and the chamber inclined-plane is a plastic cement reflective surface 10, and the metal that red light chips 11 and blue chip 12 are fixed on cavity bottom draws on the frame, after welding, forms series loop.In chamber, be filled with the fluorophor that green emitting phosphor 14, yellow fluorescent powder 13 and glue 15 mix.As one embodiment of the present of invention, glue 15 can be silica gel, silicones or epoxy resin.
Making alive in the series loop that red light chips 11 and blue chip 12 are formed, red light chips 11 sends the ruddiness that wavelength is 615nm to 700nm, blue chip 12 sends the blue light that wavelength is 445nm to 470nm, and simultaneously blue chip 12 excites green emitting phosphor 14 and yellow fluorescent powder 13 to produce wavelength respectively at the green glow of 510nm～535nm and the wavelength gold-tinted at 545nm～590nm; The ruddiness of different wave length, green glow, blue light, gold-tinted produce the white light of four wavelength behind the abundant mixed light of chamber.Excite yellow fluorescent powder to produce white light with blue chip in the prior art and compare, increased composition red, green glow, form four continuous peak wavelengths, improved spectral component, significantly improved the color rendering index of LED.
As one embodiment of the present of invention, the common loop of forming of red light chips R that chip unit 21 comprises a blue chip B and connects with blue chip B, add the 5V common voltage at the two ends of this chip unit 21 V+, V-, only need single channel to drive, circuit is simple, cost is low, and it is convenient to use, more power saving; Simultaneously, overall antistatic effect has been improved in the loop of adopting red light chips to connect with blue chip, does not need to add the antistatic device again.
In embodiments of the present invention, the circuit of the chip unit 21 that blue chip B and red light chips R are composed in series is shown in Fig. 2 A, for relatively large module, when needs more during high brightness, can adopt two chip unit parallel connections or series connection, the parallel connection of a plurality of chip unit or series connection, go to satisfy TV specific (special) requirements backlight; The circuit that a plurality of chip units are connected in parallel is shown in Fig. 2 B, and the circuit that a plurality of chip unit is connected in series is shown in Fig. 2 C.
The making flow process of the light-emitting diode that first embodiment of the invention provides now is described in detail in detail in conjunction with Fig. 1 and Fig. 2:
Step 1: prepare support and chip, supporting structure comprises the chamber with inclined inside wall at least, and the metal substrate of mutually insulated is positioned at the chamber bottom surface, two above electrode pins 16 that communicate with metal substrate, and the some of electrode pin 16 is exposed to the outside; Red light chips 11 and blue chip 12 are installed on the metal substrate of cavity bottom, red light chips 11 sends the ruddiness that wavelength is 615nm～700nm, blue chip 12 sends the blue light that wavelength is 445nm～470nm, the excitation wavelength of green emitting phosphor 14 is at 510nm～535nm, and the excitation wavelength of yellow fluorescent powder 13 is at 545nm～590nm.
Step 2: adopt automatically solid brilliant machine, automatic bonding equipment to red light chips 11 and blue chip 12 operations, also can adopt flip chip chip eutectic weldering operation.
Step 3: with excitation wavelength in the green emitting phosphor 14 of 510nm～535nm, excitation wavelength after the yellow fluorescent powder 13 of 545nm～590nm mixes with glue 15, adopt the automatically dropping glue machine with its mixed phosphor dots glue in chamber, and being covered in red light chips 11 and blue chip 12 tops, fluorophor is dried after coagulation around red light chips 11 and blue chip 12.
Step 4: in certain forward current or forward beam split screening automatically under the voltage, the LED of different colours (drilling colour index) and different brightness is made a distinction, and packing, identify, in order to satisfy requirement of client.
The light-emitting diode structure that second embodiment of the invention provides for convenience of explanation, only shows the part relevant with the embodiment of the invention as shown in Figure 3, and details are as follows.
Light-emitting diode has a hollow chamber, and the chamber inclined-plane is a plastics reflective surface 10, and the metal that amber optical chip 17 and blue chip 12 are fixed on cavity bottom draws on the frame, after welding, forms series loop.In chamber, be filled with the fluorophor that green emitting phosphor 14, yellow fluorescent powder 13 and glue 15 mix.As one embodiment of the present of invention, glue 15 can be silica gel, silicones or epoxy resin.
Making alive in the series loop that amber optical chip 17 and blue chip 12 are formed, amber optical chip 17 sends the ruddiness that wavelength is 600nm to 615nm, blue chip 12 sends the blue light that wavelength is 445nm to 470nm, and simultaneously blue chip 12 excites green emitting phosphor 14 and yellow fluorescent powder 13 to produce wavelength respectively at the green glow of 510nm～535nm and the wavelength gold-tinted at 540nm～580nm; The amber light of different wave length, green glow, blue light, gold-tinted produce the white light of four wavelength behind the abundant mixed light of chamber.Excite yellow fluorescent powder to produce white light with blue chip in the prior art and compare, increased composition red, green glow, form four continuous peak wavelengths, improved spectral component, color and luster is easy to adjust, has significantly improved the color rendering index of LED, is applicable to occasions such as LED street lamp, billboard.
As one embodiment of the present of invention, the common loop of forming of amber optical chip A that chip unit 41 comprises a blue chip B and connects with blue chip B, add the 5V common voltage at the two ends of this chip unit 41 V+, V-, only need single channel to drive, circuit is simple, cost is low, and it is convenient to use, more power saving; Simultaneously, overall antistatic effect has been improved in the loop of adopting amber optical chip 17 to connect with blue chip 12, does not need to add the antistatic device again.
In embodiments of the present invention, the circuit of the chip unit 41 that blue chip B and amber optical chip A are composed in series is shown in Fig. 4 A, for relatively large module, when needs more during high brightness, can adopt two chip unit parallel connections or series connection, the parallel connection of a plurality of chip unit or series connection, go to satisfy TV specific (special) requirements backlight; The circuit that a plurality of chip units are connected in parallel is shown in Fig. 4 B, and the circuit that a plurality of chip unit is connected in series is shown in Fig. 4 C.
The making flow process of the light-emitting diode that second embodiment of the invention provides is similar to the making flow process of the light-emitting diode that first embodiment provides, and just adopts the amber optical chip to replace red light chips, does not repeat them here.
First chip that light-emitting diode provided by the invention adopts blue chip, connects with blue chip, combining with green fluorescent material and yellow fluorescent powder are formed four continuous peak wavelengths, have improved the color rendering index of LED, have improved overall antistatic effect; Adopt single channel to drive simultaneously, circuit is simple, and cost is low.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a light-emitting diode comprises a chamber, it is characterized in that, described light-emitting diode also comprises:
Blue chip, yellow fluorescent powder, green emitting phosphor and first chip of connecting with described blue chip; Four light that peak wavelength is continuous of light composition that light that the described blue chip and first chip send and described yellow fluorescent powder and green emitting phosphor are excited and produce;
Described blue chip and described first chip are fixed in described cavity bottom; Described first chip is red light chips or amber optical chip;
Described yellow fluorescent powder and described green emitting phosphor are mixed into fluorophor by glue and are filled in the described chamber.
2. light-emitting diode as claimed in claim 1 is characterized in that, the light wavelength that described blue chip sends is 445nm to 470nm.
3. light-emitting diode as claimed in claim 1 is characterized in that, the light wavelength that described red light chips sends is 615nm to 700nm.
4. light-emitting diode as claimed in claim 1 is characterized in that, described blue chip and described first chip are composed in series chip unit; Described light-emitting diode also comprises: the single channel drive circuit, described single channel drive circuit is used to drive described chip unit.
5. light-emitting diode as claimed in claim 1 is characterized in that, described glue is silica gel or silicones or epoxy resin.
6. light-emitting diode as claimed in claim 1 is characterized in that, the excitation wavelength of described green emitting phosphor is 510nm to 535nm.
7. light-emitting diode as claimed in claim 1 is characterized in that, the excitation wavelength of described yellow fluorescent powder is 545nm to 590nm.
8. light-emitting diode as claimed in claim 1 is characterized in that, the light wavelength that described amber optical chip sends is 600nm to 615nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102176794A CN101414604B (en) | 2008-11-20 | 2008-11-20 | Light-emitting diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102176794A CN101414604B (en) | 2008-11-20 | 2008-11-20 | Light-emitting diode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101414604A CN101414604A (en) | 2009-04-22 |
| CN101414604B true CN101414604B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102176794A Active CN101414604B (en) | 2008-11-20 | 2008-11-20 | Light-emitting diode |
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| CN (1) | CN101414604B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958316B (en) | 2010-07-20 | 2013-01-16 | 上海亚明灯泡厂有限公司 | LED integrated packaging power source module |
| CN102956625A (en) * | 2011-08-18 | 2013-03-06 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting device |
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- 2008-11-20 CN CN2008102176794A patent/CN101414604B/en active Active
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| CN101414604A (en) | 2009-04-22 |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 518109 Guangdong city of Shenzhen province Baoan District Dalang Street Community creative Peak Road No. 65 building 1-4 layer Patentee after: Shenzhen City Jufei Optoelectronic Co., Ltd. Address before: 518000, 2 floor, three Ming Industrial Town, 33 Dabao Road, Baoan District District, Shenzhen, Guangdong,, China Patentee before: Shenzhen City Jufei Optoelectronic Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Light emitting diode Effective date of registration: 20211110 Granted publication date: 20100623 Pledgee: Shenzhen Gaoxin Investment microfinance Co., Ltd Pledgor: Shenzhen Jufei photoelectric Co., Ltd Registration number: Y2021980012255 |
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