CN108321285A - A kind of white light LEDs patterned fluorescent membrane structure and preparation method thereof - Google Patents
A kind of white light LEDs patterned fluorescent membrane structure and preparation method thereof Download PDFInfo
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- CN108321285A CN108321285A CN201810283383.6A CN201810283383A CN108321285A CN 108321285 A CN108321285 A CN 108321285A CN 201810283383 A CN201810283383 A CN 201810283383A CN 108321285 A CN108321285 A CN 108321285A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/508—Wavelength conversion elements having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer, wavelength conversion layer with a concentration gradient of the wavelength conversion material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
- H01L33/504—Elements with two or more wavelength conversion materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Device Packages (AREA)
Abstract
The invention discloses a kind of white light LEDs patterned fluorescent membrane structures and preparation method thereof, and this method includes the following steps：(1) several groups fluorescent powder and adhesive are weighed respectively as raw material, are uniformly mixed respectively, are formed several groups fluorescent glue mixture；(2) the fluorescent glue mixture vacuumizing and defoaming for being uniformly mixed several groups；(3) fluorescent glue mixture described in several groups is injected separately into the different piece in the designed mold of shape, forms different types of alternate composite structure of fluorescent glue mixture；(4) the several groups fluorescent glue mixture for pouring into mold is heating and curing together with mold, the fluorescence membrane of white light LEDs pattern structure is obtained after demoulding.The present invention solves the problems, such as that fluorescent powder mixes the reabsorption effect for causing red fluorescence powder for yellow or green emitting phosphor in traditional dotting glue method, reduces the loss of light.
Description
Technical field
The invention belongs to LED encapsulation fields, it is related to a kind of white light LEDs patterned fluorescent membrane structure and its preparation side
Method.
Background technology
White light LEDs are aobvious by its energy saving, efficient, environment friendly and pollution-free, long lifespan etc. as a kind of new and effective solid state light emitter
It is that countries in the world are carried out energetically to write advantage to have attracted the extensive concern of domain expert scholar as new generation of green lighting engineering
And one of the novel industry of primary study, it is considered to be forth generation lighting source, application prospect are extensive.
Industrialization white light LEDs realize white light by light transformation approach at present, and traditional packaging method is in blue-light LED chip
Surface coats the mixture of fluorescent powder and silica gel.Specific implementation process is：Blue-light LED chip is fixed on holder first, even
It turns on the electricity, weighs a certain amount of silica gel or epoxy resin and fluorescent powder, by fluorescent powder and silica gel or epoxy resin according to conjunction
Suitable ratio is uniformly mixed, vacuumize with after deaeration, using dispenser phosphor gel drop coating on blue chip surface, most postposition
Make its solidification in oven, the dispensing of this method, that is, usually said.Together by one or more LED combination, it connects
Circuit, you can form required LED light.
But in current LED packaging technologies, there is also the major issues of following aspect:
First, industrialization LED use packaging method for dispensing glue, and the concentration of fluorescent powder is difficult always consistent.This be by
In in dispensing phosphor gel dropped in LED chip by gravity, and the density of fluorescent powder is also bigger than silica gel, will necessarily deposit
The phenomenon that constantly being precipitated in silica gel or epoxy resin with the passage fluorescent powder of dispensing time；Meanwhile with dispensing process
Passage, since phosphor gel mixture is to be placed in feeding cylinder in vertical state, fluorescent powder will necessarily be deposited to feeding cylinder
Bottom, so when leading to dispensing below fluorescent powder concentration it is fewer and fewer, eventually lead to same batch or different batches LED light
Coloration is not exactly the same, therefore factory has to be divided again according to LED differences optical color parameter, increase manpower and materials at
This；
Second, single led dispensing thickness is also difficult to unanimously.For single led encapsulation, phosphor gel approximation ball
Shape is dropped in from Glue dripping head on chip, and fluorescent glue nature levelling simultaneously cures rear surface in convex shape, and thick middle surrounding is thin, therefore
It is photochromic also necessarily inconsistent with surrounding among LED；
Third, LED heat dissipations and the heated problem of aging of fluorescent powder.LED will produce a large amount of heat after working long hours, tradition
Dotting glue method phosphor gel is wrapped in LED chip, and the heat that chip generates is difficult to distribute in time, and the temperature around chip is continuous
It increases, the service life of chip is caused to reduce.Fluorescent powder, which can be led to luminous efficiency by heat ageing constantly, simultaneously reduces, and eventually leads to
The light conversion efficiency of LED reduces, and LED service lifes reduce；
4th, there are the reabsorption effects of fluorescent powder between different fluorescent powders.Since single yellow or green emitting phosphor are sealed
When dress, the colour rendering index of LED is relatively low, it is difficult to meet the demands such as normal lighting, it will usually red fluorescence powder be added to improve LED's
Colour rendering index, in traditional dotting glue method, yellow or green emitting phosphor are mixed with red fluorescence powder, red fluorescence powder
Excitation spectrum and green either between the emission spectrum of yellow fluorescent powder there are spectra overlapping red fluorescence powder can to green or
Yellow fluorescent powder generates reabsorption effect, the yellow light or green light of a red fluorescence powder meeting reabsorption part, to cause light
Loss, makes phototranstormation efficiency reduce.
In view of the foregoing, industry specialists and researcher propose the packaging method of fluorescence membrane, to overcome above-mentioned dispensing
The shortcomings that method, " one kind being suitable for slot coated method and makes white-light LED fluorescence as disclosed in Chinese patent literature CN102931326A
LED fluorescent powder slurry of powder film and preparation method thereof ", the film thickness being prepared is controllable, solves and occurs in dispensing
The inconsistent problem of LED light extractions under same batch.A kind of for another example " remote fluorescence disclosed in Chinese patent literature CN103943761A
Powder is with optical thin film and preparation method thereof ", the film of preparation is existed by basement membrane and coated in epilamellar coat and setting
Adhesive layer composition on coat, equally solves the problems occurred in dispensing method.But the above-mentioned published patent is literary
The preparation method offered is required to that a lot of other organic solvents is added.
Invention content
The present invention provides a kind of new patterned fluorescence membrane structures, white light LEDs field are used for, using thin in fluorescence
The mode that fluorescent powder not of the same race is separated to simultaneously alternate combinations in film can reduce red fluorescence powder for green or yellow fluorescence
The reabsorption effect of powder, and the purpose of combination is also achieved, and then improve phototranstormation efficiency.
The present invention also provides a kind of preparation methods of patterned fluorescence membrane structure, divide using by fluorescent powder of the same race
The mode for opening simultaneously alternate combinations can reduce red fluorescence powder for the reabsorption effect of green or yellow fluorescent powder, the system
It is the raw material of Preparation Method, simple for process, and raw materials used is still silica gel or epoxy resin and fluorescence that traditional dotting glue method is used
Powder, but solve the problems, such as that LED light color consistency is poor in traditional dotting glue method, unfavorable shadow will not be generated to the optical property of film
It rings, and reduces packaging technology step, reduce the production cost of factory.
Technical scheme is as follows：
A kind of preparation method of white light LEDs patterned fluorescent membrane structure, this method mainly include the following steps：
(1) several groups fluorescent powder and adhesive are weighed respectively as raw material, and every group of fluorescent powder and adhesive are pressed 0.1~1:
1 mass ratio is uniformly mixed, and forms several groups fluorescent glue mixture；
(2) by fluorescent glue mixture vacuumizing and defoaming described in uniformly mixed several groups；
(3) fluorescent glue mixture described in several groups is added into the mould for presetting that the thickness of shape is 0.1~1cm respectively
In different piece in tool, different types of alternate composite structure of fluorescent glue mixture is formed；
(4) fluorescent glue mixture described in several groups is heating and curing together with the mold；
(5) one-time formed white light LEDs patterned fluorescent membrane structure is obtained after demoulding.
Pattern structure of the present invention refers to being mixed with adhesive by fluorescent powder not of the same race and using alternate combinations shape
Formula composition the various fluorescence membrane structures with different shape and size, and due to the combination of fluorescent powder not of the same race and
The variously-shaped pattern formed.
Preferably, the step (4) be heating and curing for：20~40min is first toasted at 60~90 DEG C, then it is transferred to 120~
160 DEG C of 20~40min of baking.
Preferably, the several groups fluorescent powder described in the step (1), including yellow or green emitting phosphor and red
Fluorescent powder.It is highly preferred that the yellow or green emitting phosphor are YAG bases, LuAG bases, silicate, aluminate etc., the red is glimmering
Light powder is nitride or fluoride red fluorescence powder.
Preferably, the adhesive described in the step (1) is selected from silica gel, epoxy resin, silicone material, acrylic resin
In one or several kinds.
Preferably, the specific proportioning of fluorescent powder and adhesive being capable of root in every group of fluorescent glue mixture in the step (1)
Optical color parameter according to required LED is regulated and controled.
Preferably, mold shape described in the step (3) is unlimited, such as can be circle, square, rectangle, ellipse
The shape that circle, diamond shape etc. arbitrarily need, two of which fluorescent powder distribution mode are yellow and red alternate combinations or green and red friendship
For combining form, combination can be circular ring type, square ring type, sector, diamond type, stripe, inclined stripe type, spiral fan shaped etc.
The shape arbitrarily needed.
Preferably, in the step (3) by the described fluorescent glue mixture injection mold, process used can be with
It is cladding process, silk screen print method, spray coating method, 3D printing method etc., wherein specific process is technical problem, by continuous
Modified technique technology can be achieved to prepare fluorescence membrane.
Preferably, the mold described in the step (3), the material of mold need to bear 180 DEG C or more of high temperature, and
Indeformable under high temperature not decompose, surface is smooth, can flexible design and assembly and disassembly.
Preferably, in the step (3) mold entirety shape, size, shape, the different type of internal different piece be glimmering
Number of rings, block number, fan-shaped number, fringe number of light powder etc. are not changeless, and those skilled in the art can be according to actual
It needs to be designed and change, as long as ensureing that yellow or green fluorescence film and red fluorescence film are alternate combinations shapes
Formula.
Preferably, the thickness of white light LEDs patterned fluorescent membrane structure is in (0.1-1mm) ± 0.05mm.
It is more the present invention also provides a kind of patterned fluorescence membrane structure of white light LEDs, including multiple fluorescence membrane parts
A fluorescence membrane part is combined as a figure, and the setting structure of multiple fluorescence membrane parts is：Make containing
The fluorescence membrane part of fluorescent powder not of the same race is arranged alternately.
Preferably, the thickness of white light LEDs patterned fluorescent membrane structure is in (0.1-1mm) ± 0.05mm.
In a preferred embodiment, the white light LEDs include multiple red fluorescence powder systems with patterned fluorescence membrane structure
The red fluorescence film portion obtained, further includes yellow fluorescence film portion made from multiple yellow fluorescent powders or multiple green fluorescences
Green fluorescence film portion made from powder, the red fluorescence film portion and the yellow fluorescence film portion or the green
Fluorescence membrane part is to be arranged alternately.
In some embodiments, the shape of the patterned fluorescence membrane structure of the white light LEDs can be round, square
Shape, rectangle, ellipse or diamond shape, the combination of the multiple fluorescence membrane part can be circular ring type, square ring type,
Sector, diamond type, stripe, inclined stripe type, spiral fan shaped.
Preferably, white light LEDs are prepared with patterned fluorescence membrane structure using above-mentioned preparation method.
Compared with prior art, beneficial effects of the present invention are as follows：
In the preparation method of the first, present invention, preparing the raw material that the patterned fluorescent membrane structure is used can still use
The raw material used in traditional dotting glue method is not required to that other substances are added, has saved cost, and reduce environmental pollution；And it is made
Fluorescence membrane maintain the good optical property of fluorescent powder；
In the preparation method of the 2nd, present invention, fluorescent powder in traditional dotting glue method can be solved using fluorescence membrane encapsulation LED
Precipitation, LED light color consistency is poor, is unfavorable for the problems such as LED heat dissipations；
The patterned fluorescence membrane structure and preparation method thereof of the 3rd, present invention will be yellow using this method is patterned
Color either green emitting phosphor and red fluorescence powder separate and alternate combinations setting mode can not only improve single yellow or
Green emitting phosphor encapsulates the relatively low problem of LED colour rendering indexs, while can solve two in traditional dotting glue method or general fluorescence membrane
Red fluorescence powder caused by kind fluorescent powder mixes causes LED to send out the reabsorption effect of yellow or green emitting phosphor
The problems such as light efficiency reduces；
The patterned fluorescence membrane structure and preparation method thereof of the 4th, present invention is saved using fluorescence membrane packaged type
This technique of dispensing in traditional dotting glue method has been gone, packaging technology step is reduced, has reduced the production cost of factory.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Description of the drawings
Fig. 1 is the circular ring type fluorescence membrane structure chart of the embodiment of the present invention 1；
Fig. 2 is the first circular fluorescent membrane structure figure of the embodiment of the present invention 2；
Fig. 3 is second of circular fluorescent membrane structure figure of the embodiment of the present invention 2；
Fig. 4 is the third circular fluorescent membrane structure figure of the embodiment of the present invention 2；
Fig. 5 is the spiral fan shaped fluorescence membrane structure chart of the embodiment of the present invention 3；
Fig. 6 is the first square ring type fluorescence membrane structure chart of the embodiment of the present invention 4；
Fig. 7 is second of square ring type fluorescence membrane structure chart of the embodiment of the present invention 4；
Fig. 8 is the first strip type fluorescence membrane structure chart of the embodiment of the present invention 5；
Fig. 9 is second of strip type fluorescence membrane structure chart of the embodiment of the present invention 5；
Figure 10 is the first inclined stripe shape fluorescence membrane structure chart of the embodiment of the present invention 6；
Figure 11 is second of inclined stripe shape fluorescence membrane structure chart of the embodiment of the present invention 6；
Figure 12 is the first blocky fluorescence membrane structure chart of the embodiment of the present invention 7；
Figure 13 is second of blocky fluorescence membrane structure chart of the embodiment of the present invention 7；
Figure 14 is the third blocky fluorescence membrane structure chart of the embodiment of the present invention 7；
Figure 15 is the 4th kind of blocky fluorescence membrane structure chart of the embodiment of the present invention 7；
In figure 1 above -15, label 1 represents yellow or green fluorescence film portion, and label 2 represents red fluorescence
Film portion.
Specific implementation mode
The invention discloses a kind of white light LEDs patterned fluorescent membrane structures and preparation method thereof, under this method includes
State step：(1) several groups fluorescent powder and adhesive are weighed respectively as raw material, by 0.1~1:1 mass ratio mixes respectively
It is even, form several groups fluorescent glue mixture；(2) the fluorescent glue mixture vacuumizing and defoaming for being uniformly mixed several groups；(3)
By fluorescent glue mixture described in several groups, the designed thickness of shape is injected separately into as the different piece in the mold of 0.1~1cm
In, form different types of alternate composite structure of fluorescent glue mixture；(4) the several groups fluorescent glue mixture of mold will be poured into
It is heating and curing together with mold, the fluorescence membrane of white light LEDs pattern structure is obtained after demoulding.The present invention uses fluorescence membrane
In two kinds of fluorescent powders mode for being separately alternately arranged and combine, solve fluorescent powder in traditional dotting glue method mix cause it is red
Color fluorescent powder for yellow or green emitting phosphor reabsorption effect the problem of, reduce the loss of light.
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate this hair
It is bright, rather than limit protection scope of the present invention.Those skilled in the art change according to what the present invention made in practical applications
Into and adjustment, still fall within protection scope of the present invention.
Preparation method embodiment
A kind of white light LEDs patterned fluorescent membrane structure and preparation method thereof, this method includes the following steps：
(1) several groups fluorescent powder and adhesive are weighed respectively press 0.1~1 as raw material:1 mass ratio is uniformly mixed, will
Each group raw material is respectively placed in in glue cup and being uniformly mixed, and forms several groups fluorescent glue mixture；
(2) the fluorescent glue mixture vacuumizing and defoaming for being uniformly mixed several groups；
(3) by the several groups fluorescent glue mixture, it is injected separately into the mold that the designed thickness of shape is 0.1~1cm
In interior different piece, alternate combinations structure is formed between fluorescent glue mixture not of the same race；
(4) fluorescent glue mixture is placed in curing oven together with mold, 20~40min is first toasted at 60~90 DEG C, turned
Enter 120~160 DEG C of 20~40min of baking；
(5) it is the white light LEDs pattern structure for obtaining one-time formed thickness in 0.1~1 ± 0.05mm after demoulding
Fluorescence membrane.
Several groups fluorescent powder described in the step (1) includes at least YAG bases, LuAG bases, silicate, aluminate etc.
Yellow either one kind of green emitting phosphor and nitride or fluoride red fluorescence powder.
Adhesive described in the step (1) is one kind in silica gel, epoxy resin, silicone material, acrylic resin
Or it is several.
Mold shape is unlimited described in the step (3), such as can be circle, square, rectangle, ellipse, water chestnut
The shape that shape etc. arbitrarily needs, two of which fluorescent powder distribution mode are yellow and red alternate combinations or green and red alternate combinations shape
Formula, combination, which can be that circular ring type, square ring type, sector, diamond type, stripe, inclined stripe type, spiral fan shaped etc. are arbitrary, to be needed
Shape.
Preferably, in the step (3) mold entirety shape, size, shape, the different type of internal different piece be glimmering
Number of rings, block number, fan-shaped number, fringe number of light powder etc. are not changeless, and those skilled in the art can be according to actual
It needs to be designed and change, as long as ensureing that yellow or green fluorescence film and red fluorescence film are alternate combinations shapes
Formula.
Following embodiment will illustratively provide the fluorescence membrane structure of several shapes and combinations thereof mode.
Embodiment 1
If Fig. 1 is a kind of circular ring type fluorescence membrane structure, the annulus indicated by label 1 is yellow or green fluorescence film
Part, the annulus indicated by label 2 are that red fluorescence film portion, yellow or green fluorescence film portion and red fluorescence are thin
Membrane part is alternately arranged and combines, and totally 3 circle, red fluorescence film portion 2 are enclosed totally for yellow or green fluorescence film portion, the circle
The a diameter of 10cm of outmost turns of ring-like fluorescence membrane structure.
Embodiment 2
If Fig. 2,3,4 are respectively circular fluorescent membrane structure, the region indicated by label 1 is that yellow or green fluorescence are thin
Membrane part, the region indicated by label 1 are red fluorescence film portion, yellow or green fluorescence film portion and red fluorescence
Film portion is alternately arranged and combines.
Wherein, Fig. 2 is yellow or green fluorescence film portion and red fluorescence film portion is respectively half, and Fig. 3 is flat
4 sectors respectively, two kinds of fluorescence membrane parts respectively account for 2 parts, and Fig. 4 is 8 sectors of average mark, and two kinds of fluorescence membrane parts are each
4 parts are accounted for, a diameter of 10cm of the circular fluorescent membrane structure.
Embodiment 3
If Fig. 5 is spiral fan shaped fluorescence membrane structure, the region indicated by label 1 is yellow or green fluorescence film section
Point, the region indicated by label 2 is red fluorescence film portion, altogether the spiral fan shaped of 8 average marks, two kinds of fluorescence membrane portions
Divide and respectively account for 4 parts, is alternately arranged and combines, a diameter of 10cm of fluorescence membrane.
Embodiment 4
If Fig. 6,7 are square ring type fluorescence membrane structure, the region indicated by label 1 is yellow or green fluorescence film section
Point, region indicated by label 2 is red fluorescence film portion, and Fig. 6 is square structure, and Fig. 7 is rectangle structure, altogether 5
A ring being mutually socketed, yellow or green fluorescence film portion are 3 rings, and red fluorescence film portion is 2 rings, is alternately arranged simultaneously
Combination, wherein square fluorescence membrane structure length and width are respectively 10cm, rectangle fluorescence membrane structure a length of 15cm, width 10cm.
Embodiment 5
If Fig. 8,9 are strip type fluorescence membrane structure, the region indicated by label 1 is yellow or green fluorescence film section
Point, region indicated by label 2 is red fluorescence film portion, and Fig. 8 is square structure, and Fig. 9 is rectangle structure, altogether 6
Fluorescence membrane part, wherein yellow or green fluorescence film portion 3, red fluorescence film portion 3 are alternately arranged simultaneously
The length and width of combination, square fluorescence membrane structure are respectively 10cm, a length of 15cm of rectangle fluorescence membrane structure, width 10cm.
In addition to horizontal stripe shown in figure, striped can also be nicking.
Embodiment 6
If Figure 10,11 are inclined stripe shape fluorescence membrane structure, the region indicated by label 1 is that yellow or green fluorescence are thin
Membrane part, the region indicated by label 2 is red fluorescence film portion, and Figure 10 is square structure, and Figure 11 is rectangle structure,
8 fluorescence membrane parts altogether, wherein yellow or green fluorescence film portion 4, red fluorescence film portion 4, alternately
It arranges and combines, the length and width of square fluorescence membrane structure are respectively 10cm, a length of 15cm of rectangle fluorescence membrane structure, and width is
10cm。
In addition to the structure of overturning angle to left down shown in figure, fluorescence membrane structure is alternatively to the lower right corner and tilts.
Embodiment 7
If Figure 12,13,14,15 are block structure fluorescence membrane structure, the region indicated by label 1 is yellow or green
Fluorescence membrane part, the region indicated by label 2 is red fluorescence film portion, and Figure 12,14 are square structure, Figure 13,15
For rectangle structure, Figure 12,13 have 4 pieces of fluorescence membrane parts, wherein 2 pieces of yellow or green fluorescence film portion altogether, red
2 pieces of fluorescence membrane part, is alternately arranged and combines, and Figure 14,15 have 9 pieces, wherein yellow or green fluorescence film portion 5 altogether
Block, 4 pieces of red fluorescence film portion, is alternately arranged and combines, and square fluorescence membrane structure length and width are respectively 10cm, and rectangle is glimmering
Optical thin film structure a length of 15cm, width 10cm.
The white light LEDs patterned fluorescent membrane structure and preparation method thereof of the present invention has the following advantages：
In the preparation method of the first, present invention, it is still conventional point to prepare the raw material that the patterned fluorescent membrane structure is used
Other substances are not added for the raw material used in glue method, have saved cost, and reduce environmental pollution；And fluorescence obtained is thin
Film maintains the good optical property of fluorescent powder；
In the preparation method of the 2nd, present invention, fluorescent powder in traditional dotting glue method can be solved using fluorescence membrane encapsulation LED
Precipitation, LED light color consistency is poor, is unfavorable for the problems such as LED heat dissipations；
The patterned fluorescence membrane structure and preparation method thereof of the 3rd, present invention, using this method of patterning, yellow
Either green emitting phosphor and red fluorescence powder separate and the mode of alternate combinations can not only improve single yellow or green is glimmering
Light powder encapsulates the relatively low problem of LED colour rendering indexs, while can solve two kinds of fluorescence in traditional dotting glue method or general fluorescence membrane
Red fluorescence powder caused by powder mixes causes LED to send out the reabsorption effect of yellow fluorescent powder or green emitting phosphor
The problems such as light efficiency reduces；
The patterned fluorescence membrane structure and preparation method thereof of the 4th, present invention is saved using fluorescence membrane packaged type
This technique of dispensing in traditional dotting glue method has been gone, packaging technology step is reduced, has reduced the production cost of factory.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention
Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (10)
1. a kind of white light LEDs preparation method of patterned fluorescent membrane structure, which is characterized in that this method includes mainly following
Step：
(1) several groups fluorescent powder and adhesive are weighed respectively as raw material, and every group of fluorescent powder and adhesive are pressed 0.1~1:1
Mass ratio is uniformly mixed, and forms several groups fluorescent glue mixture；
(2) by fluorescent glue mixture vacuumizing and defoaming described in uniformly mixed several groups；
(3) it is in the mold of 0.1~1cm to be added into fluorescent glue mixture described in several groups respectively and preset the thickness of shape
Different piece in, form different types of alternate composite structure of fluorescent glue mixture；
(4) fluorescent glue mixture described in several groups is heating and curing together with the mold；
(5) it demoulds, that is, obtains one-time formed white light LEDs patterned fluorescent membrane structure.
2. the white light LEDs as described in claim 1 preparation method of patterned fluorescent membrane structure, which is characterized in that described
Step (4) be heating and curing for：20~40min is first toasted at 60~90 DEG C, then is transferred to 120~160 DEG C of 20~40min of baking.
3. the white light LEDs as described in claim 1 preparation method of patterned fluorescent membrane structure, which is characterized in that described
Several groups fluorescent powder described in step (1), including red fluorescence powder further include yellow fluorescent powder or green emitting phosphor.
4. the white light LEDs as described in claim 1 preparation method of patterned fluorescent membrane structure, which is characterized in that described
One or several kinds of the adhesive in silica gel, epoxy resin, silicone material, acrylic resin described in step (1).
5. the white light LEDs as described in claim 1 preparation method of patterned fluorescent membrane structure, which is characterized in that described
The specific proportioning of fluorescent powder and adhesive in step (1) described in every group of fluorescent glue mixture can be according to the light of required LED
Color parameter is regulated and controled.
6. the white light LEDs as described in claim 1 preparation method of patterned fluorescent membrane structure, which is characterized in that described
Mold described in step (3), the material of mold can bear 180 DEG C or more of high temperature, and it is indeformable at high temperature do not decompose, table
Face is smooth.
7. the white light LEDs as described in claim 1 preparation method of patterned fluorescent membrane structure, which is characterized in that described
The thickness of white light LEDs patterned fluorescent membrane structure is in (0.1-1mm) ± 0.05mm.
8. a kind of patterned fluorescence membrane structure of white light LEDs, which is characterized in that multiple including multiple fluorescence membrane parts
The fluorescence membrane part is combined as figure, and the setting structure of multiple fluorescence membrane parts is：Make containing not of the same race
The fluorescence membrane part of fluorescent powder is arranged alternately.
9. the patterned fluorescence membrane structure of white light LEDs as claimed in claim 8, which is characterized in that the white light LEDs are used
Patterned fluorescence membrane structure includes red fluorescence film portion made from multiple red fluorescence powders, further includes that multiple yellow are glimmering
Green fluorescence film portion made from yellow fluorescence film portion made from light powder or multiple green emitting phosphors, the red fluorescence
Film portion is to be arranged alternately with the yellow fluorescence film portion or the green fluorescence film portion.
10. the patterned fluorescence membrane structure of white light LEDs as claimed in claim 8, which is characterized in that the white light LEDs
It is prepared using any preparation methods of claim 1-7 with patterned fluorescence membrane structure.
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| CN201810283383.6A CN108321285A (en) | 2018-04-02 | 2018-04-02 | A kind of white light LEDs patterned fluorescent membrane structure and preparation method thereof |
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| CN108321285A true CN108321285A (en) | 2018-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935677A (en) * | 2019-04-01 | 2019-06-25 | 南京航空航天大学 | A kind of novel white-light LED fluorescence membrane structure and preparation method |
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| US20100129598A1 (en) * | 2008-11-27 | 2010-05-27 | Lighthouse Technology Co., Ltd | Optical film |
| CN102376847A (en) * | 2010-08-25 | 2012-03-14 | 海洋王照明科技股份有限公司 | Composite optical device, mold, preparation method and optical system |
| CN106684216A (en) * | 2017-01-12 | 2017-05-17 | 中国科学院宁波材料技术与工程研究所 | Composite transparent fluorescent ceramic chip and preparing method for white LEDs |
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| CN101073155A (en) * | 2004-12-06 | 2007-11-14 | 皇家飞利浦电子股份有限公司 | Single chip LED as compact color variable light source |
| US20100129598A1 (en) * | 2008-11-27 | 2010-05-27 | Lighthouse Technology Co., Ltd | Optical film |
| CN102376847A (en) * | 2010-08-25 | 2012-03-14 | 海洋王照明科技股份有限公司 | Composite optical device, mold, preparation method and optical system |
| CN106684216A (en) * | 2017-01-12 | 2017-05-17 | 中国科学院宁波材料技术与工程研究所 | Composite transparent fluorescent ceramic chip and preparing method for white LEDs |
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| CN109935677A (en) * | 2019-04-01 | 2019-06-25 | 南京航空航天大学 | A kind of novel white-light LED fluorescence membrane structure and preparation method |
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