CN104835898A - Light-spot white-light LED and production method thereof - Google Patents
Light-spot white-light LED and production method thereof Download PDFInfo
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- CN104835898A CN104835898A CN201510205638.3A CN201510205638A CN104835898A CN 104835898 A CN104835898 A CN 104835898A CN 201510205638 A CN201510205638 A CN 201510205638A CN 104835898 A CN104835898 A CN 104835898A
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- white light
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Abstract
The invention discloses a light-spot white-light LED and a production method thereof. The light-spot white-light LED comprises a support, a wafer and fluorescent colloid, wherein the wafer is fixed on the support, the fluorescent colloid fills the wafer, and the fluorescent colloid is made of a mixer of green phosphor, red phosphor, nanometer titanium dioxide and silica gel. The invention also discloses a light-spot white-light LED production method. According to the light-spot white-light LED and the production method thereof, the nanometer high-purity titanium dioxide is added in the silica gel, so that excellent absorption performance can be embodied at different wavelength regions, and therefore, the silica gel and the powder can be better mixed; and uniformity of light spots of the white-light LED can be improved; and after the nanometer titanium dioxide is ground, a mixing factor is added in the mixer, and the mixer is subjected to high-speed centrifugal vacuum mixing, so that the high-purity nanometer titanium dioxide can be optimally applied to encapsulation glue of LED encapsulation.
Description
Technical field
The present invention relates to field of LED illumination, particularly a kind of unglazed spot white light LEDs and preparation method thereof.
Background technology
The remarkable advantages such as white light LEDs is high with its efficiency, power consumption is little, the life-span is long, solid-state energy-conservation, environmental protection, are considered to " green illumination light source ", estimate to become the third generation lighting source after incandescent lamp, fluorescent lamp, have huge development potentiality.It is a kind of method studying the hottest at most at present that the method utilizing fluorescent material to change realizes white light.For the white light power LED of lighting field, the uniform spatial distribution of its colour temperature and colourity is the important indicator of properties of product.The colour temperature difference that human eye can be differentiated is 50 ~ 100 K, and the uniformity of current common LED device colourity is still undesirable, and the angle colour temperature difference of even single LEDs can greatly to 800 K.This is because phosphor concentration one timing, the probability that blue light is converted into gold-tinted is directly proportional to the fluorescent material thickness run in blue light outgoing process, and fluorescent material uneven thickness causes the main cause of white light LEDs angle colour temperature difference just.Visible, for white light LEDs, ejecting white light hot spot uniformity still can not get better improvement.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art and provides a kind of unglazed spot white light LEDs and preparation method thereof, and the present invention can improve white light LEDs hot spot uniformity.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
According to the unglazed spot white light LEDs of one that the present invention proposes, comprise support, wafer, fluorescent colloid; Wherein, wafer is fixed on support, and fluorescent colloid is filled on wafer; The material of described fluorescent colloid is the mixture of green emitting phosphor, red fluorescence powder, Nano titanium dioxide and silica gel.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs, described wafer is blue light wafer.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs, the refractive index of described silica gel is 1.55.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs, the purity of described Nano titanium dioxide is 99.3%-99.9%.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs, the emission wavelength of described blue light wafer is 450 nm-460 nm.
A kind of unglazed spot white light LEDs manufacture method, comprises the steps:
Step one, provide support;
Step 2, wafer is fixed on support;
Step 3, two-sided high-accuracy grinding mill is adopted to mill to titanium dioxide;
Step 4, the titanium dioxide after milling slowly to be joined in silica gel, adopt glass bar hand operated mixing;
Step 5, the de-airing mixer adopting rotating speed to be 1800 turns carry out stirring deaeration to the silica gel containing titanium dioxide after hand operated mixing;
Step 6, add green emitting phosphor, red fluorescence powder after reuse de-airing mixer and carry out stirring deaeration, obtain fluorescent colloid;
Step 7, fluorescent colloid step 6 obtained are filled on wafer.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs manufacture method, the time of milling in described step 3 is ten minutes.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs manufacture method, in described step 4, the refractive index of silica gel is 1.55.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs manufacture method, the time of stirring in described step 4 is 5 minutes.
As the further prioritization scheme of one of the present invention unglazed spot white light LEDs manufacture method, the rotating speed of the de-airing mixer in described step 5 and step 6 is 1800 turns.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
(1) add nanometer level high purity titanium dioxide in the silica gel in the present invention and all show excellent absorbent properties in different wave length district, rubber powder can better be mixed; To improve white light LEDs hot spot uniformity;
(2) increase mill after add and stir the factor and carry out high speed centrifugation vacuum stirring again, make use that nanometer level high purity titanium dioxide can be optimum in the sealing of LED.
Accompanying drawing explanation
Fig. 1 is the vertical view of the unglazed spot white light LEDs of the present invention.
Fig. 2 is the profile along the line AB in Fig. 1.
Reference numeral in figure is interpreted as: 1-support, 2-wafer, 3-fluorescent material, 4-silica gel.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As the front plan view that Fig. 1 is the unglazed spot white light LEDs of the present invention; Be profile as shown in Figure 2, a kind of unglazed spot white light LEDs, comprises support 1, wafer 2, fluorescent colloid; Wherein, wafer is fixed on support, and fluorescent colloid is filled on wafer; The material of described fluorescent colloid is the mixture of green emitting phosphor, red fluorescence powder, Nano titanium dioxide and silica gel 4.
Described wafer is blue light wafer, and the refractive index of described silica gel is 1.55, and the purity of described Nano titanium dioxide is 99.3%-99.9%, and the emission wavelength of described blue light wafer is 450 nm-460 nm.Green emitting phosphor, red fluorescence powder are all called fluorescent material 3.
A kind of unglazed spot white light LEDs manufacture method, comprises the steps:
Step one, provide support;
Step 2, wafer is fixed on support;
Step 3, two-sided high-accuracy grinding mill is adopted to mill to titanium dioxide;
Step 4, the titanium dioxide after milling slowly to be joined in silica gel, adopt glass bar hand operated mixing;
Step 5, the de-airing mixer adopting rotating speed to be 1800 turns carry out stirring deaeration to the silica gel containing titanium dioxide after hand operated mixing;
Step 6, add green emitting phosphor, red fluorescence powder after reuse de-airing mixer and carry out stirring deaeration, obtain fluorescent colloid;
Step 7, fluorescent colloid step 6 obtained are filled on wafer.
The time of milling in described step 3 is ten minutes, and in described step 4, the refractive index of silica gel is 1.55, and the time of stirring in described step 4 is 5 minutes, and the rotating speed of the de-airing mixer in described step 5 and step 6 is 1800 turns.
Conventional additive is compared, and nanoscale purity reaches the titanium dioxide stable in properties of 99.3%-99.9%, fast light, heat-resisting, resistance to diluted acid, resistance to diluted alkaline.There is very strong tinting strength, tinting power (covering power) and dispersion force.
Compared with conventional processing procedure, existing increase adds after milling stirs the factor and carries out high speed centrifugation vacuum stirring again, has stronger mix effect for arogel.
Make the major advantage of the manufacture method of a kind of unglazed spot white light LEDs of the present invention:
1, nanometer level high purity titanium dioxide all shows excellent absorbent properties in different wave length district, and rubber powder can better be mixed;
2, increase mill after add and stir the factor and carry out high speed centrifugation vacuum stirring again, make use that nanometer level high purity titanium dioxide can be optimum in the sealing of LED.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.
Claims (10)
1. a unglazed spot white light LEDs, is characterized in that, comprises support, wafer, fluorescent colloid; Wherein, wafer is fixed on support, and fluorescent colloid is filled on wafer; The material of described fluorescent colloid is the mixture of green emitting phosphor, red fluorescence powder, Nano titanium dioxide and silica gel.
2. the unglazed spot white light LEDs of one according to claim 1, is characterized in that, described wafer is blue light wafer.
3. the unglazed spot white light LEDs of one according to claim 1, is characterized in that, the refractive index of described silica gel is 1.55.
4. the unglazed spot white light LEDs of one according to claim 1, is characterized in that, the purity of described Nano titanium dioxide is 99.3%-99.9%.
5. the unglazed spot white light LEDs of one according to claim 2, is characterized in that, the emission wavelength of described blue light wafer is 450 nm-460 nm.
6. a unglazed spot white light LEDs manufacture method, is characterized in that, comprise the steps:
Step one, provide support;
Step 2, wafer is fixed on support;
Step 3, two-sided high-accuracy grinding mill is adopted to mill to titanium dioxide;
Step 4, the titanium dioxide after milling slowly to be joined in silica gel, adopt glass bar hand operated mixing;
Step 5, the de-airing mixer adopting rotating speed to be 1800 turns carry out stirring deaeration to the silica gel containing titanium dioxide after hand operated mixing;
Step 6, add green emitting phosphor, red fluorescence powder after reuse de-airing mixer and carry out stirring deaeration, obtain fluorescent colloid;
Step 7, fluorescent colloid step 6 obtained are filled on wafer.
7. one according to claim 6 unglazed spot white light LEDs manufacture method, is characterized in that, the time of milling in described step 3 is ten minutes.
8. one according to claim 6 unglazed spot white light LEDs manufacture method, is characterized in that, in described step 4, the refractive index of silica gel is 1.55.
9. one according to claim 6 unglazed spot white light LEDs manufacture method, is characterized in that, the time of stirring in described step 4 is 5 minutes.
10. one according to claim 6 unglazed spot white light LEDs manufacture method, is characterized in that, the rotating speed of the de-airing mixer in described step 5 and step 6 is 1800 turns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510205638.3A CN104835898A (en) | 2015-04-28 | 2015-04-28 | Light-spot white-light LED and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510205638.3A CN104835898A (en) | 2015-04-28 | 2015-04-28 | Light-spot white-light LED and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755231A (en) * | 2018-12-29 | 2019-05-14 | 晶能光电（江西）有限公司 | White-light LED chip |
| CN109888084A (en) * | 2019-02-27 | 2019-06-14 | 福建天电光电有限公司 | A kind of fluorescent glue and application its increase LED semiconductor light homogenization process |
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| US6686691B1 (en) * | 1999-09-27 | 2004-02-03 | Lumileds Lighting, U.S., Llc | Tri-color, white light LED lamps |
| US20080128735A1 (en) * | 2006-12-05 | 2008-06-05 | Samsung Electro-Mechanics Co., Ltd. | White light emitting device and white light source module using the same |
| US20100060144A1 (en) * | 2002-03-25 | 2010-03-11 | Koninklijke Philips Electronics N.V. | Tri-color white light led lamp |
| CN101694857A (en) * | 2009-10-16 | 2010-04-14 | 中外合资江苏稳润光电有限公司 | Manufacture method of low-attenuation white light LED |
| CN102983254A (en) * | 2012-11-05 | 2013-03-20 | 江苏稳润光电有限公司 | White light light-emitting diode (LED) encapsulation method |
| CN103811638A (en) * | 2012-11-06 | 2014-05-21 | 江苏稳润光电有限公司 | White light led |
| CN104465958A (en) * | 2013-09-17 | 2015-03-25 | 江苏稳润光电有限公司 | High-voltage white light LED and manufacturing method thereof |
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2015
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6686691B1 (en) * | 1999-09-27 | 2004-02-03 | Lumileds Lighting, U.S., Llc | Tri-color, white light LED lamps |
| US20100060144A1 (en) * | 2002-03-25 | 2010-03-11 | Koninklijke Philips Electronics N.V. | Tri-color white light led lamp |
| US20080128735A1 (en) * | 2006-12-05 | 2008-06-05 | Samsung Electro-Mechanics Co., Ltd. | White light emitting device and white light source module using the same |
| CN101694857A (en) * | 2009-10-16 | 2010-04-14 | 中外合资江苏稳润光电有限公司 | Manufacture method of low-attenuation white light LED |
| CN102983254A (en) * | 2012-11-05 | 2013-03-20 | 江苏稳润光电有限公司 | White light light-emitting diode (LED) encapsulation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109755231A (en) * | 2018-12-29 | 2019-05-14 | 晶能光电（江西）有限公司 | White-light LED chip |
| CN109888084A (en) * | 2019-02-27 | 2019-06-14 | 福建天电光电有限公司 | A kind of fluorescent glue and application its increase LED semiconductor light homogenization process |
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Application publication date: 20150812 |