CN201561289U - White LED - Google Patents
White LED Download PDFInfo
- Publication number
- CN201561289U CN201561289U CN2009201672091U CN200920167209U CN201561289U CN 201561289 U CN201561289 U CN 201561289U CN 2009201672091 U CN2009201672091 U CN 2009201672091U CN 200920167209 U CN200920167209 U CN 200920167209U CN 201561289 U CN201561289 U CN 201561289U
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- white light
- metal substrate
- blue
- fluorescent powder
- lens
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Abstract
The utility model provides a white LED, which comprises a metal substrate, a blue LED or an ultraviolet LED formed on the metal substrate, and a fluorescent powder lens disposed on a light emergent path of the blue LED or the ultraviolet LED. By using the fluorescent powder lens as wavelength conversion material, fluorescent powder is injection-molded in the lens without affection of chip junction temperature rise, thereby having high color rendering, high consistency with color coordinate, long service life and high lighting effect of the white LED, and relatively simple operation and high reliability of preparation technique.
Description
Technical field
The utility model belongs to field of semiconductor photoelectron technique, specifically, relates to a kind of white light LEDs.
Background technology
The main method of making white light LEDs at present is to utilize the nontransparent fluorescent material of blue-ray LED coating molecule by wavelength conversion of productions white light LEDs.Can cause temperature to raise because blue-ray LED continues to light, material for transformation of wave length can be degenerated, simultaneously because the material for transformation of wave length of coating is a non-transparent material, the light that sends at blue chip by the time phenomenon such as scattering absorption can take place, make light extraction efficiency not high; Simultaneously because the inhomogeneous meeting of applied thickness has a strong impact on its hot spot and white light colour temperature.For example because problem such as the coating inhomogeneous yellow aperture that causes, blue hot spot, white light colour temperature be inconsistent.
Chinese patent discloses CN1618925 number and discloses a kind of method of producing the white light LEDs of photochromic homogeneous, be in epoxy resin or silicones, to sneak into the fluorescent material that emits white light, also sneak in addition 0.1-10%'s and not can with the fine dust of inorganic matter end (as silicon dioxide powder) of its reaction.The fluorescent material that emits white light also can be YAG fluorescent material.This method can obtain the white light LEDs of photochromic homogeneous, can cause the problem that temperature raises, material for transformation of wave length can be degenerated and optical efficiency is not high but still exist because blue-ray LED continues to light.
YAG fluorescent material main component is (Y
2Gd)
3(Al
2Ga)
5O
12, be generally yellow, pale yellow powder shape material, have a wide range of applications in field of light emitting materials.Can form white light though coat YAG fluorescent material on blue-light LED chip, fluorescent material precipitates easily, and colour rendering index is low and luminous efficiency is not high.
The utility model content
The utility model utilizes the problem points that exists in the white light LEDs of blue light or ultraviolet leds preparation at prior art and makes, and its purpose is to provide a kind of high efficiency, colour rendering is good, the life-span is long, high conformity, white light LEDs that reliability is high.
The white light LEDs that the utility model provides is by the following technical solutions:
A kind of white light LEDs is provided, comprises: metal substrate; Blue-ray LED that on described metal substrate, forms or ultraviolet leds; And the fluorescent powder lens on the light path of going out that is arranged on described blue-ray LED or ultraviolet leds.
In addition, preferred construction is that the light transmissive material that described fluorescent powder lens comprises and the weight ratio of fluorescent material are 10: Y, wherein, 0.5≤Y≤3.
In addition, preferred construction is that described light transmissive material is PC, acrylic or silica gel.
In addition, preferred construction is that described fluorescent powder lens is solid sphere or hollow spherical lens.
In addition, preferred structure is that the bottom surface of described metal substrate offers many radiating grooves.
Moreover preferred construction is, is formed with the insulating barrier of the membrane structure that highly heat-conductive material makes on the described metal substrate.
The utility model obtains white light LEDs owing to utilize blue light or ultraviolet leds to combine with fluorescent powder lens, has improved light efficiency, has improved the life-span of white light LEDs, has improved colour rendering index, and chromaticity coordinates can not changed because of the LED junction temperature raises; By radiating groove is set in the metal substrate bottom surface, therefore greatly reduce the thermal resistance after entire product encapsulates simultaneously, improved heat dispersion to increase area of dissipation.
Description of drawings
Fig. 1 is the figure of the concrete structure of the white light LEDs that relates to of an expression embodiment of the present utility model.
Fig. 2 is the cutaway view of white light LEDs shown in Figure 1.
Fig. 3 is the cutaway view of the concrete structure of the hollow fluorescent powder lens in the white light LEDs that relates to of an expression embodiment of the present utility model.
Fig. 4 is the cutaway view of concrete structure of the solid fluorescent powder lens of the white light LEDs that relates to of an expression embodiment of the present utility model.
Description of reference numerals is as follows:
1, metal substrate; 2, insulating barrier; 3, electrode slice; 4, blue-ray LED; 5, pin; 6, radiating groove; 7, fluorescent powder lens
The specific embodiment
For making this practical purpose, technical scheme and advantage clearer, better embodiment of the present utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the figure of the concrete structure of the white light LEDs that relates to of an expression embodiment of the present utility model.Fig. 2 is the vertical view of white light LEDs shown in Figure 1.
As depicted in figs. 1 and 2, white light LEDs comprises: metal substrate 1; The rhodium oxide that adheres at the upper surface of metal substrate 1; The insulating barrier 2 of the film shape that on rhodium oxide, forms; The stickup electrode slice 3 that on insulating barrier 2, is provided with; Blue-ray LED 4; Many radiating grooves 6 that on the bottom of metal substrate 1, form and fluorescent powder lens 7.Wherein, the bottom surface that blue-ray LED 4 combines with insulating barrier 2 is a smooth flat, and the pin 5 that is positioned at the blue-ray LED 4 of side is welded to connect with electrode slice 3; Fluorescent powder lens 7 is encapsulated in going out on the light path of blue-light LED chip.Wherein, fluorescent powder lens 7 for example is that PC is expected that 10g and YAG fluorescent material 1g fully stir, by 60 degree fluorescent powder lens of injection machine injection mo(u)lding.
If the material of fluorescent powder lens 7 adopts identical injected plastics material and proportioning, in the low application of the colour temperature of white light LEDs requirement of the present utility model, the structure of fluorescent powder lens 7 can adopt hollow-core construction as shown in Figure 3; And in the high application of colour temperature that white light LEDs of the present utility model requires, the structure of fluorescent powder lens 7 can adopt as shown in Figure 4 inside to be filled with the solid construction of silica gel.In addition, in other embodiment of the present utility model, the material of fluorescent powder lens also can adopt other light transmissive materials such as acrylic, silica gel to substitute.According to different application needs, the weight ratio of light transmissive material and YAG fluorescent material is 10: Y, wherein 0.5≤Y≤3.
The metal substrate 1 of present embodiment can be made by thermal conductive metallic materials such as copper or aluminium.
The power of the blue-ray LED of present embodiment for example is made as 3W, but is not limited to 3W, and in other embodiments, the power of blue-ray LED can be set according to different application needs with quantity.
In addition, the rhodium oxide that adheres on metal substrate in the present embodiment in other embodiments, also can adopt other heat sink material to substitute.The membrane structure that insulating barrier 2 adopts highly heat-conductive material to form has reduced thermal resistance greatly.Perhaps, in other embodiments, also can not adopt insulating barrier and blue-ray LED directly is set on metal substrate, but can reduce the heat dispersion of the white light LEDs that the utility model relates to like this.
The emission wavelength of the employed blue-ray LED of present embodiment is between 440nm-480nm, and the correlated colour temperature that obtains white light after the conversion is between 2700K-10000K.
The white light LEDs that better embodiment of the present utility model relates to is the example preparation to utilize blue-ray LED, but be not limited in blue-ray LED, the utility model is applicable to the white light LEDs that utilizes the ultraviolet leds preparation too, the white light LEDs that utilizes ultraviolet leds preparation is identical with the white-light LED structure of the above-mentioned preparation that utilizes blue-ray LED, and the descriptions thereof are omitted at this.
The utility model can be applied to the encapsulation of high-power blue light or ultraviolet light chip, also can be applied to the encapsulation of small-power chip.
In sum, the White LED that relates to according to the utility model has the following advantages:
Increased area of dissipation by many radiating grooves being set, therefore greatly reduced the thermal resistance after entire product encapsulates, improved heat dispersion in the metal substrate bottom surface.In addition, by utilizing fluorescent powder lens as material for transformation of wave length, light absorbent portion beam split by fluorescent powder lens time that blue light or ultraviolet LED chip are sent converts the light that is different from the luminescence chip wavelength to, and the light of different wave length mixes and obtains white light.Because fluorescent material is injection-moulded in the lens, directly do not contact blue light or ultraviolet LED chip, therefore can not be subjected to the influence that junction temperature of chip raises and degenerate, thereby improved the uniformity of chromaticity coordinates, the service life and the light efficiency of white light LEDs have been improved, and, the colour rendering index of white light LEDs is greatly improved.Moreover technological operation of the present utility model is simple relatively, reliability is high.
Though described the principle of the present utility model and the specific embodiment at white light LEDs above; but; under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of above-mentioned embodiment, and these improvement or distortion drop in the protection domain of the present utility model.It will be understood by those skilled in the art that top specific descriptions just in order to explain the purpose of this utility model, are not to be used to limit the utility model.Protection domain of the present utility model is limited by claim and equivalent thereof.
Claims (4)
1. white light LEDs comprises:
Metal substrate;
Blue-ray LED that on described metal substrate, forms or ultraviolet leds; And
Be arranged on the fluorescent powder lens on the light path of of described blue-ray LED or ultraviolet leds.
2. white light LEDs according to claim 1 is characterized in that, described fluorescent powder lens is solid sphere or hollow spherical lens.
3. white light LEDs according to claim 1 is characterized in that the bottom surface of described metal substrate offers many radiating grooves.
4. white light LEDs according to claim 1 is characterized in that, is formed with the insulating barrier of the membrane structure that highly heat-conductive material makes on the described metal substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201672091U CN201561289U (en) | 2009-07-31 | 2009-07-31 | White LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201672091U CN201561289U (en) | 2009-07-31 | 2009-07-31 | White LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201561289U true CN201561289U (en) | 2010-08-25 |
Family
ID=42626434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201672091U Expired - Fee Related CN201561289U (en) | 2009-07-31 | 2009-07-31 | White LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201561289U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988636A (en) * | 2009-07-31 | 2011-03-23 | 歌尔声学股份有限公司 | White light LED (light-emitting diode) and preparation method thereof |
| CN103542326A (en) * | 2013-09-30 | 2014-01-29 | 易美芯光（北京）科技有限公司 | Optical device capable of realizing high-color-gamut backlight |
-
2009
- 2009-07-31 CN CN2009201672091U patent/CN201561289U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988636A (en) * | 2009-07-31 | 2011-03-23 | 歌尔声学股份有限公司 | White light LED (light-emitting diode) and preparation method thereof |
| CN103542326A (en) * | 2013-09-30 | 2014-01-29 | 易美芯光（北京）科技有限公司 | Optical device capable of realizing high-color-gamut backlight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20140731 |
|
| EXPY | Termination of patent right or utility model |