CN102721007A - Remote phosphor structure applicable to LED lighting and production method thereof - Google Patents
Remote phosphor structure applicable to LED lighting and production method thereof Download PDFInfo
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- CN102721007A CN102721007A CN2012101987914A CN201210198791A CN102721007A CN 102721007 A CN102721007 A CN 102721007A CN 2012101987914 A CN2012101987914 A CN 2012101987914A CN 201210198791 A CN201210198791 A CN 201210198791A CN 102721007 A CN102721007 A CN 102721007A
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Abstract
The invention provides a remote phosphor structure applicable to LED lighting and a production method thereof. The remote phosphor structure applicable to LED lighting comprises a light-permeable support part and a phosphor layer arranged on the same. The phosphor layer at least comprises first-wavelength phosphor and second-wavelength phosphor. The first-wavelength phosphor forms a first phosphor layer. The second-wavelength phosphor forms a second phosphor layer. The first phosphor layer and the second phosphor layer are stacked on the light-permeable support part layer by layer. The production method includes producing at least two layers of phosphor different in wavelength on the light-permeable support part. By the design of the phosphor layers, multi-wavelength layering-stacked structure or multi-wavelength array structure, multispectral emergence is achieved, color rendering is improved, color temperature is lowered, and luminous efficiency of the phosphor is guaranteed.
Description
Technical field
The present invention relates to have high efficiency fluorophor; Relate in particular to a kind of remote fluorescence body structure and preparation method thereof with excellent properties; This kind remote phosphor can be used for conductor light emitting diode (LED) and is the light source of illuminator, belongs to electric light source and lighting technical field.
Background technology
Advantages such as white light LEDs is owing to have a high light efficiency, the long-life and enjoy people's attention.Along with the development of LED technology and the expansion of application, colour temperature, colour rendering and the luminous efficiency of LED lighting source are had higher requirement.
In order to realize low colour temperature, the high-color rendering of LED, in yellow fluorescent powder, add red fluorescence powder usually at present, reduce colour temperature, but this kind method can cause the decline of luminous efficiency to improve its colour rendering index.Improve colour rendering index, the two is a contradiction with improving luminous efficiency to reduce colour temperature, and performance therefore how to improve this two aspect simultaneously becomes the difficult point of each company's research at present.
Present fluorescent material coating method adopts some glue or is sprayed on the surface of led chip; Because led chip can send great amount of heat and be delivered on the fluorescent material when work; Because fuel factor causes the quantum efficiency of fluorescent material to reduce, and then the whole luminous efficiency of influence.
In order to solve the problem that fluorescent material quantum efficiency that chip heating causes reduces; Number of patent application is that CN101513120A, invention and created name are the Light-Emitting Diode lighting arrangements that comprises light emitting phosphor; Announced a kind of LED that utilizes the preparation of remote fluorescence powder; Because its used phosphor is away from luminescence chip but not direct and said luminescence chip thermo-contact; The decrease in efficiency that can avoid chip heating to cause has improved the luminous efficiency of LED, can also improve the uniformity and the uniformity of optical property simultaneously.But, can not well solve the technical problem of low colour temperature, high light efficiency owing to only adopt the phosphor material of single wavelength or the phosphor material of mixing in its remote fluorescence bisque.
Summary of the invention
The objective of the invention is to the remote fluorescence powder, can not satisfy the shortcoming of high colour developing, low colour temperature and high-luminous-efficiency characteristic simultaneously, remote fluorescence body structure of a kind of LED of being applicable to illumination and preparation method thereof is provided.Through the phosphor powder layer with the outgoing of different colours light of design multilayer or the fluorescence array combination of different colours light outgoing; Improve the whole lighting efficiency of LED illumination, and guarantee whole brightness and uniformity of chromaticity, realize high colour developing; High efficiency and low colour temperature LED illumination, and save cost.
For realizing above-mentioned purpose; The present invention provides a kind of remote fluorescence body structure of the LED of being applicable to illumination, comprises the support member and the phosphor powder layer of printing opacity, and phosphor powder layer is provided on the said euphotic support; Phosphor powder layer comprises the first wavelength fluorescent powder and the second wavelength fluorescent powder at least; The first wavelength fluorescent powder forms first phosphor powder layer, and the second wavelength fluorescent powder forms second phosphor powder layer, and said first phosphor powder layer and second phosphor powder layer are range upon range of to be covered on the said euphotic support.
The present invention also provides a kind of LED lighting device that adopts above-mentioned laminated fluorescence structure as light conversion element; This lighting device comprises the remote fluorescence body structure in LED radiation source and the such scheme, and is lower than the outgoing wavelength away from the phosphor powder layer of radiation source near the outgoing wavelength of the phosphor powder layer of radiation source.
The present invention also provides a kind of preparation method based on above-mentioned laminated fluorescence structure, and its step is following: A) fluorescent powder paste material preparation: with fluorescent material, fixative, mixing diluents, stir, make the fluorescent powder paste material of appropriate viscosity; B) fluorescent powder paste material that phosphor powder layer preparation: with steps A) makes evenly is coated on printing opacity and supports, and heats support member simultaneously to the 20-80 degree, impels diluent to volatilize rapidly; C) transmission element that is coated with phosphor powder layer of gained is heated to the 100-150 degree curing: with step B), is incubated 1-2 hour, with the phosphor powder layer curing molding; D) fluorescent material of change different wave length repeats pulp preparation, applies and curing, obtains the phosphor structures of the different numbers of plies.
For realizing the object of the invention; Based on identical design, the present invention also provides a kind of remote fluorescence body structure of the LED of being applicable to illumination, comprises the support member and the phosphor powder layer of printing opacity; Phosphor powder layer is provided on this euphotic support; Phosphor powder layer comprises the first wavelength fluorescent powder and the second wavelength fluorescent powder at least, and the first wavelength fluorescent powder is covered in the first area of said phosphor powder layer, and the second wavelength fluorescent powder is covered in the second area of said phosphor powder layer.
Further, several described first areas are array-like with several described second areas.
The present invention also provides a kind of LED lighting device based on above-mentioned array phosphor structures, and it comprises the LED radiation source and is used for the long-range array fluorophor of light conversion.
The present invention also provides a kind of preparation method based on above-mentioned array phosphor structures, comprises the steps: A) the fluorescent powder paste material preparation: with fluorescent material, fixative, mixing diluents, stir, make the fluorescent powder paste material of appropriate viscosity; B) fluorescent powder paste material that phosphor powder layer preparation: with steps A) makes evenly is coated on the euphotic support and the technology such as mask, photoetching that are aided with form pattern, heats support member to 20-80 degree simultaneously, impels diluent to volatilize rapidly; C) transmission element that is coated with phosphor powder layer of gained is heated to the 100-150 degree curing: with step B), is incubated 1-2 hour, with the phosphor powder layer curing molding; D) change the fluorescent material of different wave length, repeat pulp preparation, change the pattern that mask or photoetching form, repetitive coatings and curing can obtain the phosphor structures of different arrays.
Beneficial effect of the present invention is the structure at the surface design phosphor powder layer of euphotic support, and applies the preparation fluorophor through fluorescent material.Through design phosphor powder layer structure, adopt the stratiform overlaying structure of multi-wavelength or the array structure of multi-wavelength, realize multispectral outgoing, when improving colour rendering and reducing colour temperature, guarantee the luminous efficiency of fluorophor.Can also guarantee simultaneously whole brightness and uniformity of chromaticity.
Description of drawings
Fig. 1 is an encapsulation back LED structure, among the figure, and 1 wiring board, 2 radiation sources (chip or light source), 3 lampshades, 4 gripper shoes, 5,6 are respectively phosphor powder layer, and wherein 5 is long wavelength's phosphor powder layer, and 6 is short wavelength's phosphor powder layer;
Fig. 2 is the fluorescent material array of remote fluorescence bisque, and grid R is a kind of fluorescent material among the figure, and all the other grid are other a kind of fluorescent material;
Fig. 3 phosphor preparation flow chart.
The specific embodiment
Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
As shown in Figure 1, phosphor structures of the present invention comprises following two part compositions: euphotic support 4 and the phosphor powder layer 5,6 of realizing the fluorescence conversion; Phosphor powder layer 5,6 is provided on the euphotic support 4.Phosphor powder layer 5 adopts a kind of fluorescent material of wavelength, and phosphor powder layer 6 adopts the fluorescent material of another kind of wavelength.Phosphor powder layer adopts the mode of multiple fluorescent material, multilayer stack to realize that adopt the fluorescent material of different wave length, long wavelength's fluorescent material can partially absorb the light of low wavelength fluorescent powder outgoing.Adopt stack successively, and adopt the fluorescent material of low wavelength near the phosphor powder layer 6 of radiation source 2 (light source or chip); Phosphor powder layer 5 away from radiation source 2 (light source or chip) adopts long wavelength's fluorescent material.Can avoid fluorescent material mixed like this, cause long wavelength's fluorescent material to hinder the emergent light that the fluorescent material that hangs down wavelength absorbs radiation source.Through thickness and the fixative of each layer inside and the ratio of fluorescent material of controlling each layer, can effectively control the ratio between each wavelength fluorescent powder, and then regulate its luminescent properties.
Shown in Figure 2, phosphor powder layer adopts many array way to realize.Grid R is a kind of fluorescent material of wavelength, and all the other grid are the fluorescent material of other a kind of wavelength.Can design the different array of multiple big small size like this, add the fluorescent material of different wave length, regulate and control area, shape and thickness proportion that each wavelength fluorescent powder forms array, realize excellent luminescent properties.
Among the present invention, euphotic support preferred planar light-passing board, in other embodiments, euphotic support can be optical modules such as spill or convex.Euphotic support is more than 90% by light transmission rate, and refractive index is the glass of 1.4-1.9, a kind of the processing in the plastic material.Euphotic support can also add glass or plastic material of light diffusing agent etc. and process equal tabula rasa.
As shown in Figure 3, in the present invention,, adopt following steps in order to realize above-mentioned multilayer stack phosphor structures:
The preparation of A fluorescent powder paste material
Fluorescent material, fixative, diluent, mixing such as other additives stir, and make fluorescent powder paste material.
The preparation of B phosphor powder layer
The fluorescent powder paste material that makes evenly is coated on the light-passing board, heats light-passing board simultaneously, impel diluent to volatilize rapidly, process the fluorescent plate blank to the 20-80 degree.
C solidifies
The fluorescent plate blank of gained in the above-mentioned steps is heated to the 100-150 degree, is incubated 1-2 hour, make slurry curing.
D changes the fluorescent material of different wave length, repeats pulp preparation, applies and curing, obtains the fluorescent plate of multi-wavelength layer structure.
As shown in Figure 3, in the present invention,, adopt following steps in order to realize above-mentioned many arrays phosphor structures:
The preparation of A fluorescent powder paste material
Mixing such as fluorescent material, fixative, diluent and/or other additives stir, and make fluorescent powder paste material.
The preparation of B phosphor powder layer
The fluorescent powder paste material that makes evenly is coated on the light-passing board, heats light-passing board simultaneously to the 20-80 degree, impel diluent to volatilize rapidly, process the fluorescent plate blank, wherein apply and adopt: spraying, spin coating or blade coating and the technology such as mask, photoetching that are aided with form pattern.
C solidifies
The fluorescent plate blank of gained in the above-mentioned steps is heated to the 100-150 degree, is incubated 1-2 hour, make slurry curing.
D changes the pattern that mask or photoetching form, and repetitive coatings and curing can obtain the fluorescent plate of different arrays.
The used material of the present invention all can be obtained by market purchasing.Fixative is a kind of among silica gel, epoxy resin, PC (Merlon) PMMA (polymethyl methacrylate), and diluent be for can dissolving the organic solvent of fixative, and volatile.Other additives are dispersant, plasticizer etc.
Preferred embodiment 1
With indigo plant, greenly mix with silica gel respectively with red fluorescence powder, add xylenes simultaneously as diluent, stir, obtain blue, green and red three kinds of fluorescent powder paste materials respectively.The mode that adopts blade coating to be aided with mask prepares blue fluorescent body on the PC plate; After drying 2 hours under the 100 degree conditions; The oven dry 2 hours under 100 degree conditions of blade coating one deck green fluorescence layer again, back, blade coating one deck red fluorescence layer more subsequently; And under 100 degree conditions, dried 2 hours, can obtain the fluorophor of indigo plant-green-red stack fluorescence coating.
Preferred embodiment 2
Yellow is mixed with epoxy resin respectively with red fluorescence powder, add acetone simultaneously as diluent, polyamines stirs as curing agent, obtains yellow, red two kinds of fluorescent powder paste materials respectively.Heating PMMA plate to 80 degree; Zone R territory (like Fig. 2) the preparation red fluorescence layer that the mode that adopts spraying to be aided with mask is designing in advance; After 1 hour, change mask in oven dry under the 100 degree conditions, spray the yellow fluorescence layer again in remaining areas; And 100 oven dry under the degree condition 1 hour, can obtain to have the fluorophor of Huang-red fluorescent material array at last.
In LED illumination application field; The phosphor structures of array of stratiform stack or multi-wavelength that adopts multi-wavelength of the present invention is as the light conversion element of LED illumination; Realize the LED multispectral outgoing of throwing light on; And key elements such as the region area of thickness, fluorescent material array that can be through the control phosphor powder layer and shape, when improving colour rendering and reducing colour temperature, guarantee the luminous efficiency of fluorophor.Can also guarantee simultaneously whole brightness and uniformity of chromaticity.
Above-mentioned specific embodiment is described in detail the present invention, and the foregoing description only is used to explain the present invention, but and is not used in qualification protection scope of the present invention.
Claims (18)
1. remote fluorescence body structure that is applicable to LED illumination; The support member and the phosphor powder layer that comprise printing opacity; Phosphor powder layer is provided on the said euphotic support, it is characterized in that: said phosphor powder layer comprises the first wavelength fluorescent powder and the second wavelength fluorescent powder at least, and the said first wavelength fluorescent powder forms first phosphor powder layer; The said second wavelength fluorescent powder forms second phosphor powder layer, and said first phosphor powder layer and second phosphor powder layer are range upon range of to be covered on the said euphotic support.
2. remote fluorescence body structure according to claim 1 is characterized in that: the outgoing wavelength near the phosphor powder layer of LED radiation source is lower than the outgoing wavelength away from the phosphor powder layer of radiation source.
3. remote fluorescence body structure according to claim 1 and 2 is characterized in that: the said first wavelength fluorescent powder and the second wavelength fluorescent powder can be excited by identical LED radiation source and long wavelength's fluorescent material can partially absorb the light of short wavelength's fluorescent material outgoing.
4. remote fluorescence body structure according to claim 1 is characterized in that: said euphotic support is more than 90% by light transmission rate, and refractive index is the glass of 1.4-1.9, a kind of the processing in the plastic material.
5. remote fluorescence body structure according to claim 1 is characterized in that: said euphotic support is processed by the glass that adds light diffusing agent or the equal tabula rasa of plastic material.
6. LED lighting device is characterized in that: comprise LED radiation source and remote fluorescence body structure as claimed in claim 1, be lower than the outgoing wavelength away from the phosphor powder layer of radiation source near the outgoing wavelength of the phosphor powder layer of said radiation source.
7. LED lighting device according to claim 6 is characterized in that: the said first wavelength fluorescent powder and the second wavelength fluorescent powder can be excited by identical radiation source and long wavelength's fluorescent material can partially absorb the light of short wavelength's fluorescent material outgoing.
8. remote fluorescence body structure that is applicable to LED illumination; The support member and the phosphor powder layer that comprise printing opacity; Phosphor powder layer is provided on the said euphotic support; It is characterized in that: said phosphor powder layer comprises the first wavelength fluorescent powder and the second wavelength fluorescent powder at least, and the said first wavelength fluorescent powder is covered in the first area of said phosphor powder layer, and the said second wavelength fluorescent powder is covered in the second area of said phosphor powder layer.
9. remote fluorescence body structure according to claim 8 is characterized in that: several described first areas are array-like with several described second areas.
10. a LED lighting device is characterized in that: comprise LED radiation source and remote fluorescence body structure as claimed in claim 8.
11. a preparation method who is applicable to the remote fluorescence body structure of LED illumination is characterized in that comprising the steps:
A) fluorescent powder paste material preparation: with fluorescent material, fixative, mixing diluents, stir, make the fluorescent powder paste material of appropriate viscosity;
B) phosphor powder layer preparation
With steps A) fluorescent powder paste material that makes evenly is coated on printing opacity and supports, and heats support member simultaneously to the 20-80 degree, impels diluent to volatilize rapidly;
C) solidify
With step B) in the transmission element that is coated with phosphor powder layer of gained be heated to the 100-150 degree, be incubated 1-2 hour, with the phosphor powder layer curing molding;
D) fluorescent material of change different wave length repeats pulp preparation, applies and curing, obtains the phosphor structures of the different numbers of plies.
12. the preparation method of remote fluorescence body structure according to claim 11 is characterized in that: described fixative is a kind of in silica gel, epoxy resin, Merlon, the polymethyl methacrylate.
13. the preparation method of remote fluorescence body structure according to claim 11 is characterized in that: described diluent is the organic solvent that can dissolve fixative, and volatile.
14. the preparation method of remote fluorescence body structure according to claim 11 is characterized in that: describedly be applied to spraying, spin coating, a kind of in the blade coating.
15. a preparation method who is applicable to the remote fluorescence body structure of LED illumination is characterized in that comprising the steps:
A) fluorescent powder paste material preparation: with fluorescent material, fixative, mixing diluents, stir, make the fluorescent powder paste material of appropriate viscosity;
B) phosphor powder layer preparation
With steps A) fluorescent powder paste material that makes evenly is coated on the euphotic support and the technology such as mask, photoetching that are aided with form patterns, heats support member to 20-80 degree simultaneously, impels diluent to volatilize rapidly;
C) solidify
With step B) in the transmission element that is coated with phosphor powder layer of gained be heated to the 100-150 degree, be incubated 1-2 hour, with the phosphor powder layer curing molding;
D) change the fluorescent material of different wave length, repeat pulp preparation, change the pattern that mask or photoetching form, repetitive coatings and curing can obtain the phosphor structures of different arrays.
16. the preparation method of remote fluorescence body structure according to claim 15 is characterized in that: described fixative is a kind of in silica gel, epoxy resin, Merlon, the polymethyl methacrylate.
17. the preparation method of remote fluorescence body structure according to claim 15 is characterized in that: described diluent is the organic solvent that can dissolve fixative, and volatile.
18. the preparation method of remote fluorescence body structure according to claim 15 is characterized in that: described paint-on technique is spraying, spin coating, a kind of in the blade coating.
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| CN103208583A (en) * | 2013-04-12 | 2013-07-17 | 天津理工大学 | Warm white light-emitting diode (LED) plane light source luminous body and manufacturing method thereof |
| DE102015001723A1 (en) | 2015-02-05 | 2016-08-11 | Sergey Dyukin | The method of improving the characteristics of lighting devices with a front lighting of the light guide, which include the luminophore, which is illuminated with semiconductor structures. |
| CN106784240A (en) * | 2016-12-23 | 2017-05-31 | 佛山市国星光电股份有限公司 | The method for packing and its LED component and its LED of a kind of white light LED part |
| CN107425111A (en) * | 2017-06-28 | 2017-12-01 | 常州市鑫嘉生物科技有限公司 | A kind of white light LEDs long-distance fluorescent powder method for packing |
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| WO2018112972A1 (en) * | 2016-12-24 | 2018-06-28 | 孙雪刚 | Fluorescent lamp with fluorescent powder as light source |
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| CN107579142A (en) * | 2017-08-28 | 2018-01-12 | 深圳创维－Rgb电子有限公司 | LED, display and television set |
| CN109854980A (en) * | 2019-03-28 | 2019-06-07 | 湖北大学 | Laser excitation generates white-light illuminating light source flourescent sheet and preparation method thereof |
| CN109854980B (en) * | 2019-03-28 | 2020-06-26 | 湖北大学 | Fluorescent sheet for illuminating light source by generating white light through laser excitation and preparation method thereof |
| CN113809216A (en) * | 2021-09-17 | 2021-12-17 | 福建天电光电有限公司 | Preparation method of solid fluorescent glue and solid fluorescent glue sheet |
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Application publication date: 20121010 |