CN204497229U - The large power white light LED of bright dipping time space aberration can be eliminated - Google Patents
The large power white light LED of bright dipping time space aberration can be eliminated Download PDFInfo
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- CN204497229U CN204497229U CN201420793050.5U CN201420793050U CN204497229U CN 204497229 U CN204497229 U CN 204497229U CN 201420793050 U CN201420793050 U CN 201420793050U CN 204497229 U CN204497229 U CN 204497229U
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Abstract
The utility model provides a kind of large power white light LED eliminating bright dipping time space aberration, comprises COB chip module, transparent ceramic fluorescence cover plate, high transparency filled media and reflector; Described COB chip module is the circuit base plate being packaged with many blue-light LED chips; Described COB chip module is positioned at the bottom of reflector, and the medial surface of described reflector comprises the face of cylinder being in hypomere and the bell mouth surface being positioned at epimere; Described COB chip module whole height outline is lower than the face of cylinder of reflector; Described transparent ceramic fluorescence cover plate is positioned at above COB chip module and is also fixed on reflector by sealing viscose glue; And this transparent ceramic fluorescence cover plate cover plate that to be the fluorescent transparent ceramic material fired after obtaining rear-earth-doped YAG presoma by chemical liquid phase reaction or fluorescent transparent glass ceramic material obtained, thickness range is 0.5 ~ 2.5mm; Described high transparency filled media fills up the cavity between transparent ceramic fluorescence cover plate and COB chip module; The both positive and negative polarity of described COB chip module is electrically connected with external positive and negative electrode respectively.
Description
Technical field
The utility model relates to a kind of white light LEDs field of luminescent technology, is specifically related to a kind of high integrated high-power white light LED encapsulation structure eliminating bright dipping time space aberration.
Background technology
Since Edison's utility model incandescent lamp in 1882, mankind's lighting source experienced by three phases: incandescent lamp, neon light, gaseous discharge lamp.As the real revolution of lighting technology, white light LEDs is described as forth generation lighting source.Compared to traditional lighting, its significant difference is, white light LEDs utilizes semi-conducting material that electric energy is converted into light, and light does not produce heat simultaneously, and has the feature such as long-life, energy-saving and environmental protection.
But body fluorescence conversion technology is still the mainstream technology manufacturing white light LEDs at present both at home and abroad.Traditional body fluorescence conversion technology is by applying yellow fluorescent powder on blue-light LED chip, and when fluorescent material sends sodium yellow after blue-light excited, blue light and yellow light mix form white light; This technology has that coated technique is simple, blue-light LED chip and yellow fluorescent powder preparation is comparatively ripe, YAG:Ce
3+the excitation spectrum of fluorescent material and the advantage such as InGaN or GaN blue chip luminescent spectrum comparatively mates manufacture white light LEDs method the most ripe at present.But there are the following problems for said method: during because being coated on chip surface, coating layer thickness is difficult to control, and causes white light correlated colour temperature angular distribution uneven, causes producing the phenomenons such as yellow circle around ejecting white light light source.
On the other hand, white light LEDs is popularized in illumination still exists the lower key issue of luminous flux with application aspect, namely as lighting source, must send more light as far as possible, must have higher energy utilization efficiency.And single-chip power cannot meet lighting field to high brightness, high-power requirement.For this reason, for realizing the luminous flux needed for general lighting, high-power, high integrated white light LED technology must be sought, if realize great power LED with multiple blue-light LED chip applies yellow fluorescent powder, its above-mentioned defect is just obvious all the more, differ greatly with the large power white light LED in ideal, especially producing the phenomenons such as yellow circle around ejecting white light light source can especially severe.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of large power white light LED eliminating bright dipping time space aberration.
The utility model is achieved in that a kind of large power white light LED eliminating bright dipping time space aberration, comprises COB chip module, transparent ceramic fluorescence cover plate, high transparency filled media and reflector; Described COB chip module is the circuit base plate being packaged with many blue-light LED chips; Described COB chip module is positioned at the bottom of reflector, and the medial surface of described reflector comprises the face of cylinder being in hypomere and the bell mouth surface being positioned at epimere; Described COB chip module whole height outline is lower than the face of cylinder of reflector; Described transparent ceramic fluorescence cover plate is positioned at above COB chip module and is also fixed on reflector by sealing viscose glue; And this transparent ceramic fluorescence cover plate cover plate that to be the fluorescent transparent ceramic material fired after obtaining rear-earth-doped YAG presoma by chemical liquid phase reaction or fluorescent transparent glass ceramic material obtained, thickness range is 0.5 ~ 2.5mm; Described high transparency filled media fills up the cavity between transparent ceramic fluorescence cover plate and COB chip module; The both positive and negative polarity of described COB chip module is electrically connected with external positive and negative electrode respectively.
Further, also comprise radiator, this radiator is fixed on the bottom of described COB chip module and reflector by heat conduction viscose glue.
Further, the end face radius of described transparent ceramic fluorescence cover plate is less than bottom surface radius, and side is arcwall face.
Further, the blue-light LED chip that described COB chip module encapsulates arranges by array structure, and is connected by series, parallel or series-parallel connection, and the spacing of adjacent blue-light LED chip is 3.0 ~ 5.0mm.
Further, the medial surface of described reflector is coated with high reverse--bias material.
The utility model tool has the following advantages: adopt COB multi-chip integration packaging technology, and by many high-power LED chip packages on a circuit base plate, modularization, volume be little, the high power that realizes integrated optical source module, to realize large power white light LED; Have that chip cost is lower, light efficiency is higher, light decay is slow, chip-derivation is sufficient, the chip-count of unit are can flexible design, the features such as secondary optical design is fairly simple.The most important thing is, the medial surface of its reflector comprises the face of cylinder being in hypomere and the bell mouth surface being positioned at epimere, and makes COB chip module whole height outline lower than the face of cylinder of reflector; Add transparent ceramic fluorescence cover plate adopt obtain rear-earth-doped YAG presoma by chemical liquid phase reaction after the fluorescent transparent ceramic material fired or fluorescent transparent glass ceramic material obtain, and thickness range controls between 0.5 ~ 2.5mm, not only can increase effective output of light, the edge chromatic effects such as the Huang Bian even eliminating packaged light source appearance can also be slowed down, to eliminate bright dipping time space aberration.
Accompanying drawing explanation
The utility model is further described with reference to the accompanying drawings in conjunction with the embodiments.
Fig. 1 is the structural representation of the utility model large power white light LED embodiment;
Fig. 2 is the structural representation of the COB chip module of the utility model embodiment;
Fig. 3 is the structural representation of the transparent ceramic fluorescence cover plate of the utility model embodiment;
Fig. 4 is the section structure schematic diagram of the utility model reflector;
Fig. 5 is the spectrogram of the utility model embodiment one embodiment.
Embodiment
As shown in Figures 1 to 4, the large power white light LED eliminating bright dipping time space aberration of the present utility model, comprises COB chip module 1, transparent ceramic fluorescence cover plate 2, high transparency filled media 3, reflector 4 and radiator 6.The transparent ceramic fluorescence cover plate 2 fired after adopting COB chip module 1 to obtain rear-earth-doped YAG presoma with employing by chemical liquid phase reaction combines, without the need to using fluorescent material, to solve in prior art the defect brought because using fluorescent material, the scattering loss that conventional fluorescent powder cladding process exists as can be effectively solved, luminous efficiency Yin Wendu raise and decline, painted light decay, the problem such as spectrum stability is not enough caused of material aging.
As depicted in figs. 1 and 2, described COB chip module 1 is the circuit base plate 12 being packaged with many blue-light LED chips 11; Wherein, blue-light LED chip 11 of the present invention can reach more than 100, can realize real high-power; Described COB chip module 1 is positioned at the bottom of reflector 4; The both positive and negative polarity 13 of described COB chip module 1 is electrically connected with external positive and negative electrode respectively.In a preferred embodiment, on described COB chip module 1, the blue-light LED chip 11 of encapsulation presses array structure arrangement, and is connected by series, parallel or series-parallel connection; And the spacing of adjacent blue-light LED chip 11 is 3.0 ~ 5.0mm.Circuit base plate 12 in described COB chip module 1 is square, oval or circular.
As shown in figures 1 and 3, described transparent ceramic fluorescence cover plate 2 is positioned at above COB chip module 1 and is also fixed on reflector 4 by sealing viscose glue 5; Described transparent ceramic fluorescence cover plate 2 is the obtained cover plate of the fluorescent transparent ceramic material fired after obtaining rear-earth-doped YAG presoma by chemical liquid phase reaction or fluorescent transparent glass ceramic material, and thickness range is 0.5 ~ 2.5mm.End face 21 radius of described transparent ceramic fluorescence cover plate 2 is less than bottom surface 22 radius, and side 23 is arcwall face, and the congregational rate of light can be made so better.
As shown in Figure 1 and Figure 4, the medial surface of described reflector 4 comprises the face of cylinder 41 being in hypomere and the bell mouth surface 42 being positioned at epimere, make the longitudinal section of formation reflector 4 form two gradient shape, and its interior angle A1 is 90 °, and exterior angle A2 is no more than the oblique angle of 90 °; Described COB chip module 1 whole height outline is lower than the face of cylinder 41.Reflector is two gradient shapes, not only can increase effective output of light, can also slow down the edge chromatic effects such as the Huang Bian even eliminating packaged light source appearance, to eliminate bright dipping time space aberration.The medial surface of described reflector is coated with high reverse--bias material, makes reflecting effect better.
As shown in Figure 1, described high transparency filled media 3 fills up the cavity between transparent ceramic fluorescence cover plate 2 and COB chip module 1; Described high transparency filled media 3 can be high transparency machine silicon class material, and its refractive index is 1.5 ~ 1.7.Described radiator 6 is fixed on the bottom of described COB chip module 1 and reflector 4 by heat conduction viscose glue 7.
As shown in Figure 5, can to eliminate the Exemplary parameter values table of the large power white light LED of bright dipping time space aberration as shown in the table for the utility model:
| Parameter name | Exemplary parameter values | Parameter name | Exemplary parameter values |
| Dominant wavelength (nm) | 556.4 | Luminous flux (Φ v/lm) | 7836.047 |
| Peak wavelength (nm) | 449.0 | Optical efficiency (lm/W) | 121.621 |
| Color rendering index (Ra) | 64.4 | Forward voltage (Vf/V) | 30.69 |
| Bandwidth (nm) | 21.3 | Forward current (If/mA) | 2099.400 |
| Colour temperature Tc(K) | 5384 | Leakage current (uA) | 0.0 |
| Colorimetric purity | 0.212 | Spectral energy (%) | 63 |
| Chromaticity coordinate (x, y) | 0.3363,0.4004 | The time of integration (mS) | 5 |
| Chromaticity coordinate (u, v) | 0.1886,0.3368 | Luminous power | 24459.35 |
As can be seen from Figure 5: made large power white light LED achieves high light flux and specular removal, its light efficiency value is greater than 120lm/W, luminous flux is greater than 7800lm, visible the utility model effectively can solve the problem such as scattering loss, light efficiency reduction, light decay, spectrum stability deficiency that current white light LEDs uses fluorescent material cladding process to run into, large power white light LED not only ensures higher light extraction efficiency, and rising angle and central light strength are all improved.
In sum, the utility model adopts COB multi-chip integration packaging technology, and by many high-power LED chip packages on a circuit base plate, modularization, volume be little, the high power that realizes integrated optical source module, to realize large power white light LED; Have that chip cost is lower, light efficiency is higher, light decay is slow, chip-derivation is sufficient, the chip-count of unit are can flexible design, the features such as secondary optical design is fairly simple.The most important thing is, the medial surface of its reflector comprises the face of cylinder being in hypomere and the bell mouth surface being positioned at epimere, and makes COB chip module whole height outline lower than the face of cylinder of reflector; Add transparent ceramic fluorescence cover plate adopt obtain rear-earth-doped YAG presoma by chemical liquid phase reaction after the fluorescent transparent ceramic material fired or fluorescent transparent glass ceramic material obtain, and thickness range controls between 0.5 ~ 2.5mm, not only can increase effective output of light, the edge chromatic effects such as the Huang Bian even eliminating packaged light source appearance can also be slowed down, to eliminate bright dipping time space aberration.
Although the foregoing describe embodiment of the present utility model; but be familiar with those skilled in the art to be to be understood that; specific embodiment described by us is illustrative; instead of for the restriction to scope of the present utility model; those of ordinary skill in the art, in the modification of the equivalence done according to spirit of the present utility model and change, should be encompassed in scope that claim of the present utility model protects.
Claims (5)
1. can eliminate a large power white light LED for bright dipping time space aberration, it is characterized in that: comprise COB chip module, transparent ceramic fluorescence cover plate, high transparency filled media and reflector; Described COB chip module is the circuit base plate being packaged with many blue-light LED chips; Described COB chip module is positioned at the bottom of reflector, and the medial surface of described reflector comprises the face of cylinder being in hypomere and the bell mouth surface being positioned at epimere; Described COB chip module whole height outline is lower than the face of cylinder of reflector; Described transparent ceramic fluorescence cover plate is positioned at above COB chip module and is also fixed on reflector by sealing viscose glue; And this transparent ceramic fluorescence cover plate cover plate that to be the fluorescent transparent ceramic material fired after obtaining rear-earth-doped YAG presoma by chemical liquid phase reaction or fluorescent transparent glass ceramic material obtained, thickness range is 0.5 ~ 2.5mm; Described high transparency filled media fills up the cavity between transparent ceramic fluorescence cover plate and COB chip module; The both positive and negative polarity of described COB chip module is electrically connected with external positive and negative electrode respectively.
2. the large power white light LED eliminating bright dipping time space aberration according to claim 1, is characterized in that: also comprise radiator, and this radiator is fixed on the bottom of described COB chip module and reflector by heat conduction viscose glue.
3. the large power white light LED eliminating bright dipping time space aberration according to claim 1 and 2, is characterized in that: the end face radius of described transparent ceramic fluorescence cover plate is less than bottom surface radius, and side is arcwall face.
4. the large power white light LED eliminating bright dipping time space aberration according to claim 1, it is characterized in that: the blue-light LED chip that described COB chip module encapsulates arranges by array structure, and connected by series, parallel or series-parallel connection, the spacing of adjacent blue-light LED chip is 3.0 ~ 5.0mm.
5. the large power white light LED eliminating bright dipping time space aberration according to claim 1, is characterized in that: the medial surface of described reflector is coated with high reverse--bias material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762143A (en) * | 2016-03-07 | 2016-07-13 | 江苏师范大学 | High-power white-light LED light source based on transparent ceramic fluorescent tube |
| WO2019210486A1 (en) * | 2018-05-03 | 2019-11-07 | Xi' An Raysees Technology Co. Ltd | Cob led and method for packaging cob led |
-
2014
- 2014-12-16 CN CN201420793050.5U patent/CN204497229U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762143A (en) * | 2016-03-07 | 2016-07-13 | 江苏师范大学 | High-power white-light LED light source based on transparent ceramic fluorescent tube |
| WO2019210486A1 (en) * | 2018-05-03 | 2019-11-07 | Xi' An Raysees Technology Co. Ltd | Cob led and method for packaging cob led |
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