CN106085424A - High colour gamut phosphor combination, white light LEDs and preparation method thereof - Google Patents
High colour gamut phosphor combination, white light LEDs and preparation method thereof Download PDFInfo
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- CN106085424A CN106085424A CN201610411211.3A CN201610411211A CN106085424A CN 106085424 A CN106085424 A CN 106085424A CN 201610411211 A CN201610411211 A CN 201610411211A CN 106085424 A CN106085424 A CN 106085424A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/61—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing fluorine, chlorine, bromine, iodine or unspecified halogen elements
- C09K11/617—Silicates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7706—Aluminates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The present invention relates to a kind of white light LEDs backlight technology field, particularly to a kind of high colour gamut phosphor combination, this phosphor combination includes that mass ratio is (1～4): (0.5～2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), wherein red light fluorescent powder is potassium fluosilicate, and yellow fluorescent powder is yttrium-aluminium-garnet.The present invention also provides for a kind of white light LEDs, and it includes the fluorescent glue prepared by above-mentioned phosphor combination.The present invention farther includes the preparation method of white light LEDs, it includes weighing mass ratio for (1～4): (0.5～2): above-mentioned red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), obtain fluorescent glue after being mixed with colloid by above-mentioned fluorescent material, and use fluorescent glue to prepare required white light LEDs further.The high colour gamut phosphor combination of the present invention and white light LEDs preparation method can obtain high colour gamut white light LEDs, have color saturation higher, more life-like advantage.
Description
[technical field]
The present invention relates to white light LEDs backlight technology field, particularly to a kind of high colour gamut phosphor combination, white light LEDs and
Its preparation method.
[background technology]
Existing market is increasing to the demand of white light LEDs.The generally main implementation of white light LEDs has following several: 1,
Realizing white light by the mixing of Red Green Blue LED chip, by the chip package by these three kinds of colors, major advantage is aobvious
Color is good, but relatively costly, and the light decay of three kinds of color LED chip is different, thus easily produces the defects such as metachromatism；
2, in order to make LED product color more perfect, color intensity is more rich, color closer to real world, numerous research and development technologies
Personnel are devoted to find the color gamut value improving LED product, by utilizing ultraviolet light or near ultraviolet excitated three primary color phosphor, thus
Sending white light, this method is decided by the performance of three primary color phosphor, although have high colour gamut and preparation technology is simple, but
The shortcomings such as it is low that it exists luminous efficiency, and temperature stability is poor, ultraviolet light easily leakage.3, by blue-light LED chip is excited Huang
Color fluorescent material sends gold-tinted, and the residue blue light that gold-tinted sends with chip again is combined into white light.This scheme efficiency is the highest, but by
In lacking HONGGUANG component, spectrum is the widest, the turgor of its color about at 60%-70%, the bright-coloured degree of its picture and forcing
True property is poor, thus can not meet the technological requirement of all colour temperatures, and therefore its application scenario has certain limitation.
Therefore, on the whole, it is achieved the method for high colour gamut white light LEDs there is also the biggest problem, need people at this base
Continue innovation research and development on plinth, overcome these technical barriers.
[summary of the invention]
For overcoming the technical barrier that existing LED product colour gamut area coverage is less, the invention provides a kind of LED product color
High colour gamut phosphor combination that territory area coverage is big, white light LEDs and preparation method thereof.
The present invention solves that the scheme of technical problem is to provide a kind of high colour gamut phosphor combination, it includes that mass ratio is (1
～4): (0.5～2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), described red light fluorescent powder is fluorine
Potassium silicate, yellow fluorescent powder is yttrium-aluminium-garnet.
Preferably, one or more during described green light fluorescent powder is halogen silicate, sulfide, silicate and nitrogen oxides
Mixture.
Preferably, described green light fluorescent powder may further be Sialon green light fluorescent powder, described red light fluorescent powder, green-emitting fluorescent
The mean diameter of powder and yellow fluorescent powder is 5um～30um.
Preferably, the mass ratio of described red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder may further be (1～3):
(0.5～1.5): (0.5～1.5).
The present invention solves that the yet another aspect of technical problem is to provide a kind of white light LEDs preparation method, it includes following step
Rapid: to weigh mass ratio for (1～4): (0.5～2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), its
In, described red light fluorescent powder is potassium fluosilicate, and yellow fluorescent powder is yttrium-aluminium-garnet, is mixed to get with colloid by above-mentioned fluorescent material
Fluorescent glue, uses described fluorescent glue to prepare required white light LEDs.
Preferably, described colloid is silica gel, the quality of described fluorescent material account for fluorescent material and silica gel gross mass 30%～
50%.
Preferably, described in be mixed into ball milling mixing, mixing time add at least one abrading-ball, described abrading-ball a diameter of 3～
10mm。
Preferably, described ball milling mixing temperature is 30 DEG C～60 DEG C.
The present invention solves that the yet another aspect of technical problem is to provide a kind of white light LEDs, it includes fluorescent glue, described fluorescence
Glue includes that mass ratio is (1～4): (0.5～2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), its
In, described red light fluorescent powder is potassium fluosilicate, and yellow fluorescent powder is yttrium-aluminium-garnet.
Preferably, described white light LEDs is sent white light by blue light or ultraviolet excitation.
Compared with prior art, one provided by the present invention high colour gamut phosphor combination, wherein, red light fluorescent powder, Huang
Emitting phosphor and green light fluorescent powder mass ratio are (1～4): (0.5～2): (0.5～2), and described red light fluorescent powder is hexafluosilicic acid
Potassium, yellow fluorescent powder is yttrium-aluminium-garnet and carries out being mixed to get fluorescent glue by described phosphor combination and colloid, goes forward side by side one
Step uses described fluorescent glue to prepare required white light LEDs, by using above-mentioned technique to be packaged into white light LEDs, its white light LEDs
Spectral absorption peak can narrow further.Owing to when the half-wave width of fluorescent material is the narrowest, its whole spectrum then trends towards monochromatic
Spectrum, the excitation that now fluorescent material is corresponding is the highest, and the white-light spectrum that thus fluorescent material is mixed into is then closer to the whitest
Light spectrum, the turgor of its color can reach more than 90%, and bright-coloured degree and the degree true to nature of its picture are higher.
[accompanying drawing explanation]
Fig. 1 is the spectrogram of common normal white light encapsulating products.
Fig. 2 is the spectrogram corresponding to experimental group 1 of the present invention.
[detailed description of the invention]
In order to realize the purpose of the present invention, technical scheme and advantage are clearer, real below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the present invention.Should be appreciated that specific embodiment described herein is only in order to explain this
Bright, it is not intended to limit the present invention.
First embodiment of the invention provides a kind of high colour gamut phosphor combination, and it includes that mass ratio is (1～4): (0.5～
2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), wherein, described red light fluorescent powder is potassium fluosilicate,
Yellow fluorescent powder is yttrium-aluminium-garnet.
Further, the mass ratio of red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder is (1～3): (0.5～
1.5): (0.5～1.5).In some preferred embodiments of the present invention, can be described red light fluorescent powder, green light fluorescent powder and Huang
The quality of emitting phosphor accounts for the 61.2% of fluorescent material gross mass respectively, and 19.4%, 19.4%.Can be again described HONGGUANG fluorescence
The quality of powder, green light fluorescent powder and yellow fluorescent powder accounts for the 58% of fluorescent material gross mass respectively, and 21%, 21%.Can also is that institute
State the quality of red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder and account for the 55% of fluorescent material gross mass respectively, 23%, 22%.
Can also be that the quality of described red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder accounts for the 67% of fluorescent material gross mass respectively,
17%, 16%.
Preferably, described red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder account for the 60% of fluorescent material total amount respectively,
20% and 20%.
In the present invention, described green light fluorescent powder can be the one in halogen silicate, sulfide, silicate and nitrogen oxides
Or several combinations.In particular embodiments of the invention, described green light fluorescent powder concretely Sialon.
Preferably, the mean diameter of described red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder is 5um～30um.
In some preferably embodiment, the mean diameter of red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder can be further
16um～25um.
The preparation method of white light LEDs that the second embodiment of the present invention provides is: weigh mass ratio for (1～4): (0.5～
2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), wherein, described red light fluorescent powder is potassium fluosilicate,
Yellow fluorescent powder is yttrium-aluminium-garnet, and above-mentioned fluorescent material and colloid are mixed to get fluorescent glue, uses the preparation of described fluorescent glue to obtain
White light LEDs needed for.
In the present invention, described fluorescent material and colloid carrying out mixed glue, wherein the quality of fluorescent material accounts for fluorescent material and colloid
The 30%～50% of total amount.
Described colloid can be including but not limited to: organic silica gel and inorganic silica gel, and wherein, organic silica gel includes: silicone rubber,
The mixture of one or more in silicones and silicone oil, inorganic silica gel includes in Type B silica gel, silochrom and Kiselgel A
The mixture of one or more.Described organic silica gel is (1～4) with the mixing quality ratio of described inorganic silica gel: (2～7).More enter
One step ground, described organic silica gel is (1～2) with the mixing quality ratio of described inorganic silica gel: (5～7).In the present invention, some are concrete
Embodiment in, described colloid concretely silicone rubber and Type B silica gel mix, with mass ratio, the colloid obtained for 1:7, can be also
Silicone rubber, Kiselgel A mix, with mass ratio, the colloid obtained with Type B silica gel for 1:1:5.
In some embodiments of the invention, in order to make fluorescent glue mixing more uniform, can add at least during mixed glue
One abrading-ball, the material selection zirconium oxide of abrading-ball.It is good that zirconium oxide has high tenacity, anti-wear performance.Ball radius be preferably 3～
10mm, because ball radius is the biggest, it is impossible to reaching mixed glue uniform, ball radius is the least, can may cause glimmering during mixed glue
The pulverizing of light powder, it is impossible to the requirement such as brightness reaching later stage packaging part.Similarly, also there is shadow to mixed adhesive process in the quantity of abrading-ball
Ring.When ball radius is less, abrading-ball quantity can be the most；When ball radius is bigger, abrading-ball quantity can be relatively fewer.As at this
Invent some preferably in embodiment, the quantity of the abrading-ball of a diameter of 3～5mm with a diameter of 5～10mm abrading-ball quantity it
Than being (2～6): (1～3).
During mixed glue, temperature is preferably arranged to 30～60 DEG C, because at such a temperature, silica gel viscosity is relatively low, is beneficial to mixing.
Finally by mixed glue uniformly after described fluorescent glue inject be provided with the LED support of chip in be packaged, specifically,
By glue in described LED support base point, then on described LED support point, a LED chip is fixed at the position of glue.Enter
One step ground, by corresponding with the positive pole of described LED support for the positive pole of described LED chip welding, simultaneously by the negative pole of described LED chip
Welding corresponding with the negative pole of described LED support.Described fluorescent glue injects LED support planted agent and covers described LED chip.Envelope is filled glimmering
LED support after optical cement toasts in being placed in baking box, makes fluorescent glue solidify, obtains LED product.
Preferably, in the preparation method of the white light LEDs of the present invention, LED chip is blue chip or black light chip.?
Some are preferably in embodiment, and LED chip is blue chip.
The third embodiment of the present invention provides a white light LEDs product, described white light LEDs product it include fluorescent glue, described
Fluorescent glue includes that mass ratio is (1～4): (0.5～2): the red light fluorescent powder of (0.5～2), green light fluorescent powder and gold-tinted fluorescence
Powder, wherein, described red light fluorescent powder is potassium fluosilicate, and yellow fluorescent powder is yttrium-aluminium-garnet.
Preferably, described white light LEDs is sent white light by by blue light or ultraviolet excitation fluorescent material, described white light LEDs
White color purity is higher, and its white-light spectrum is close to ideal white light, and its color gamut value can reach more than 90%.
For the preparation method further instruction to white light LEDs provided by the present invention, the present invention provides following concrete
Experimental group.
Experimental group 1: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 2.1g (hexafluosilicic acid
Potassium red light fluorescent powder 1.26g, Sialon green light fluorescent powder 0.42g, yttrium-aluminium-garnet yellow fluorescent powder 0.42g).The quality of fluorescent material
Accounting for the 30% of the fluorescent material gross mass with colloid, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet are yellow
The quality of emitting phosphor accounts for the 60%, 20% and 20% of fluorescent material gross mass respectively.With silica gel, fluorescent material is carried out ball milling mix.
Use the zirconium oxide balls of a diameter of 3～10mm.Being injected by fluorescent glue in the LED support being provided with blue chip, fluorescent glue covers
Lid blue chip, baking envelope fills the LED support of fluorescent glue, makes fluorescent glue solidification obtain LED product.
Experimental group 2: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 2.1g (hexafluosilicic acid
Potassium red light fluorescent powder 1.05g, Sialon green light fluorescent powder 0.53g, yttrium-aluminium-garnet yellow fluorescent powder 0.52g).The quality of fluorescent material
Accounting for the 30% of the fluorescent material gross mass with colloid, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet are yellow
The quality of emitting phosphor accounts for the 50%, 25% and 25% of fluorescent material gross mass respectively.Other condition and the experiment condition of experimental group 1
Identical.
Experimental group 3: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 2.1g (hexafluosilicic acid
Potassium red light fluorescent powder 1.47g, Sialon green light fluorescent powder 0.32g, yttrium-aluminium-garnet yellow fluorescent powder 0.31g).The quality of fluorescent material
Accounting for the 30% of the fluorescent material gross mass with colloid, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet are yellow
The quality of emitting phosphor accounts for the 70%, 15% and 15% of fluorescent material gross mass respectively.Other condition and the experiment condition of experimental group 1
Identical.
Experimental group 4: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 3.3g, fluorescent material
Quality account for silica gel and the 40% of fluorescent material gross mass, other condition is identical with the experiment condition of experimental group 1.
Experimental group 5: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 5.0g, fluorescent material
Quality account for silica gel and the 50% of fluorescent material gross mass, other condition is identical with the experiment condition of experimental group 1.
Matched group 1: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 2.1g (hexafluosilicic acid
Potassium red light fluorescent powder 0.21g, Sialon green light fluorescent powder 0.95g, yttrium-aluminium-garnet yellow fluorescent powder 0.94g).The quality of fluorescent material
Accounting for the 30% of the fluorescent material gross mass with colloid, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet are yellow
The quality of emitting phosphor accounts for the 10% of fluorescent material gross mass, 45% and 45% respectively.Other condition and the experiment condition of experimental group 1
Identical.
Matched group 2: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 2.1g (hexafluosilicic acid
Potassium red light fluorescent powder 0.42g, Sialon green light fluorescent powder 0.84g, yttrium-aluminium-garnet yellow fluorescent powder 0.84g).The quality of fluorescent material
Accounting for the 30% of the fluorescent material gross mass with colloid, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet are yellow
The quality of emitting phosphor accounts for the 20% of fluorescent material gross mass, 40% and 40% respectively.Other condition and the experiment condition of experimental group 1
Identical.
Matched group 3: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 2.1g (hexafluosilicic acid
Potassium red light fluorescent powder 1.89g, Sialon green light fluorescent powder 0.11g, yttrium-aluminium-garnet yellow fluorescent powder 0.10g).The quality of fluorescent material
Accounting for the 30% of the fluorescent material gross mass with colloid, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet are yellow
The quality of emitting phosphor accounts for the 90% of fluorescent material gross mass, 5% and 5% respectively.The experiment condition phase of other condition and experimental group 1
With.
Matched group 4: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 1.7g before mixed glue,
The quality of fluorescent material accounts for the 25% of total amount, and other condition is identical with the experiment condition of experimental group 1.
Matched group 5: weigh silica gel 5.0g (including 0.63g silicone rubber and 4.37gB type silica gel), fluorescent material 6.1g before mixed glue,
The quality of fluorescent material accounts for the 55% of total amount, and other condition is identical with the experiment condition of experimental group 1.
Matched group 6: weigh silica gel 5.0g (including 0g silicone rubber and 5.0gB type silica gel), fluorescent material 2.1g, fluorescence before mixed glue
The quality of powder accounts for silica gel and the 30% of fluorescent material gross mass, and other condition is identical with the experiment condition of experimental group 1.
Matched group 7: weigh silica gel 5.0g (including 4.37g silicone rubber and 0.63gB type silica gel), fluorescent material 2.1g before mixed glue,
The quality of fluorescent material accounts for silica gel and the 30% of fluorescent material gross mass, and other condition is identical with the experiment condition of experimental group 1.
Matched group 8: weigh silica gel 5.0g (including 5.0g silicone rubber and 0gB type silica gel), fluorescent material 2.1g, fluorescence before mixed glue
The quality of powder accounts for silica gel and the 30% of fluorescent material gross mass, and other condition is identical with the experiment condition of experimental group 1.
In order to the fluorescent glue obtained prepared by above-mentioned experimental group 1-5 and matched group 1-8 is carried out performance test, the present invention carries
Method of testing for following:
Concrete detection method 1, the relatively detection of the LED product color gamut value difference that different phosphor combination cause
Experimental technique: take the LED product that above-mentioned experimental group 1～3 and matched group 1～3 obtain and carry out the test of colour gamut, will
LED product furnishing successively redness, green and blue picture, and when LED product is monochromatic, test the colour gamut coordinate of its correspondence
(R/G/B) color gamut value of corresponding LED product, it is calculated by its colour gamut coordinate.
Experimental result: as shown in table 1.
Color gamut value corresponding under the different phosphor combination of table 1
Interpretation of result: the color gamut value product more than 80% can be obtained according to the LED product obtained by experimental group 1～3, comparison
The color gamut value of group 1～3 correspondences is significant lower.
From above-mentioned table 1, in experimental group 1, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet
Yellow fluorescent powder accounts for the 60%, 20% and 20% of fluorescent material total amount respectively, and the color gamut value of its obtained LED colour gamut product is relatively
High, it is possible to realize high colour gamut.
In experimental group 2, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet yellow fluorescent powder are respectively
When accounting for the 50%, 25% and 25% of fluorescent material total amount, the color gamut value of obtained LED colour gamut product is preferable.
In experimental group 3, potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet yellow fluorescent powder are respectively
When accounting for the 70%, 15% and 15% of fluorescent material total amount, the color gamut value of obtained LED colour gamut product is preferable.
In matched group 1～3, when potassium fluosilicate red light fluorescent powder, Sialon green light fluorescent powder and yttrium-aluminium-garnet gold-tinted fluorescence
Powder exceed provided by the present invention or limit scope time, the color gamut value of its correspondence is relatively low.
Further, in order to phosphor combination provided by the present invention and white light LEDs product are detected, with this
The white light LEDs product that bright experimental group 1 is obtained carries out spectral detection, as it is shown in figure 1, the light of common normal white light encapsulating products
Absworption peak shown by spectrogram is wider, and only two absworption peaks, lays respectively at 445nm and at 550nm, corresponding colour gamut
Value is 72%.As in figure 2 it is shown, high colour gamut phosphor combination of the present invention and the light corresponding to experimental group 1 of white light LEDs preparation method
In spectrogram, fluorescent material, under the exciting of blue chip, is emitted in the blue light of 445nm, at the green glow of 540nm, and red at 625nm
Light, it is seen then that narrowing further of spectrogram, brings the lifting that excitation is breakthrough, it is achieved that the colour gamut of more than 90%.Use
Other experimental grouies provided by the present invention or the prepared white light LEDs product obtained of embodiment obtain and above-mentioned experimental group 1 equally
Same or like spectrogram testing result.
Concrete detection method 2, detection is compared the different of component between the silica gel of addition and fluorescent material and is caused fluorescent glue performance
Difference
Experimental technique: take above-mentioned experimental group 1, experimental group 4 and experimental group 5 logical with the fluorescent glue that matched group 4～5 prepares
The LED lamp bead obtained after crossing common encapsulation carries out light efficiency and color rendering index test.
Experimental result: as shown in table 2.
The different rubber powder of table 2 is than the light efficiency of corresponding lamp bead and color rendering index table
Interpretation of result: Comprehensive Experiment group 1, experimental group 4～5 and matched group 9～10 are analyzed and understood, above-mentioned experimental group 1, experiment
The light efficiency of group 4～5 is apparently higher than the light efficiency of matched group 4～5, and between experimental group and matched group, color rendering index is without significant change.
Wherein, the difference of light efficiency performance in experimental group 1, experimental group 4～5 and matched group 4～5, its reason is as follows: along with fluorescent material content
Rising, the light efficiency of LED lamp bead presents and first raises the trend reduced afterwards, and during beginning, fluorescent material is gradually increased, and light-emitting phosphor accounts for
Total light efficiency ratio is also gradually increased；After the content of fluorescent material exceedes a certain marginal value, owing to fluorescent material is too much, equal volume
Fluorescent glue in, the content of fluorescent material is on the high side, hinders passing through of some blue light and gold-tinted, therefore, can directly contribute light efficiency
Decline.
Visible, fluorescent material percentage employed in experimental group 1 of the present invention, experimental group 4 and experimental group 5 be 30%～
When 50%, corresponding light efficiency is higher, and the fluorescent material amount selecting this scope is preferable.
Concrete detection method 3, silica gel causes the inspection of fluorescent glue performance difference at different silica gel content than mixing from fluorescent material
Survey
Experimental technique: by carrying out mixed glue at different silica gel content ratios, observe fluorescent glue and reach uniform situation.
Experimental result: as shown in table 3.
The different silica gel content information slip more uniform than the fluorescent glue of lower correspondence of table 3
| Project | Silicone rubber | Type B silica gel | Fluorescent material | Uniformity coefficient |
| Experimental group 1 | 0.63g | 4.37g | 2.10g | 92% |
| Matched group 6 | 0 | 5.00g | 2.10g | 81% |
| Matched group 7 | 4.37g | 0.63g | 2.10g | 65% |
| Matched group 8 | 5.00g | 0 | 2.10g | 60% |
Note: in table 3, the uniformity is that 85%～100% expression is good；The uniformity is that 70%～85% expression is general；Uniformly
Degree is poor less than 70% expression.
Interpretation of result: add more Type B silica gel and less silicone rubber in experimental group 1, it is possible to obtain the uniformity preferable
Fluorescent glue.And the composition of silica gel all uses Type B silica gel in matched group 6, its uniformity coefficient is general；Matched group 7 is selected relatively
Many silicone rubber and less Type B silica gel, its uniformity coefficient is poor；In matched group 8, the composition of silica gel all uses silicone rubber, its
Uniformity coefficient is poor.Owing to density and the silicone rubber density contrast of fluorescent material is away from relatively big, can be with glimmering in the mixed process of fluorescent glue
The sedimentation of light powder, therefore adds more silicone rubber and can cause mixing the problem that glue uniformity coefficient is the best.And Type B silica gel is because of its density
Less with phosphor's density gap, slow down fluorescent material sedimentation velocity, therefore add more Type B silica gel and make uniformity coefficient relatively
Good.And experimental group 1 can obtain uniformity more preferable than matched group 6, it is owing to the addition that silicone rubber is a small amount of is advantageous for mixing all
Even property, silicone rubber is weak due to its surface tension in whipping process, and surface can the little work that can play froth breaking, stabilized mixture
With.
Visible, experimental group 1 can obtain the ratio of the fluorescent glue of the preferable uniformity, the kind of the colloid of addition and various colloids
Difference, can impact its mixed glue effect.
Above-mentioned experimental result is equally applicable in other specific embodiment of the present invention, it is seen then that use the present invention to be carried
The fluorescent glue that the mixed adhesive process of confession prepares has the advantage that mixing is homogeneous and mixing efficiency is high, has described fluorescent glue
LED lamp bead has light efficiency and color developing preferably feature.
Compared with prior art, high colour gamut phosphor combination provided by the present invention, white light LEDs and preparation method thereof have
Advantages below:
A kind of high colour gamut phosphor combination of the present invention and the preparation method of white light LEDs have the advantage that
(1) a kind of high colour gamut phosphor combination includes that mass ratio is (1～4): (0.5～2): the HONGGUANG fluorescence of (0.5～2)
Powder, green light fluorescent powder and yellow fluorescent powder, described red light fluorescent powder is potassium fluosilicate, and yellow fluorescent powder is yttrium-aluminium-garnet.Logical
Cross and carry out being mixed to get fluorescent glue by above-mentioned phosphor combination and colloid, the LED product prepared by this phosphor combination, its light
Spectrum absworption peak narrows further.The spectrogram that fluorescent material obtains after being stimulated, when its half-wave width is the narrowest, its whole spectrum then tends to
In monochromatic spectrum, now the excitation of this fluorescent material is the highest, the white-light spectrum that thus fluorescent material is mixed into then closer to
Preferably white-light spectrum, the turgor of its color can reach more than 90%, and the bright-coloured degree of its picture and verisimilitude are preferable.
(2) green light fluorescent powder is halogen silicate, sulfide, silicate and nitrogen oxides, and described green light fluorescent powder is further
For Sialon, select the green light fluorescent powder of this series can obtain the white light LEDs product that colour gamut is higher.
(3) in the present invention, the proportioning of fluorescent material may further be (1～3): (0.5～1.5): (0.5～1.5), at this
LED light spectrum can be made under ratio to narrow further, so that excitation improves thus that acquisition LED product can be made to have is more excellent
Gamut range.
(4) mean diameter of fluorescent material is 10um～25um, and particle diameter is less, beneficially mixes homogeneous with colloid.Fluorescent material
The size of grain not only affects mixed adhesive process, and can affect color rendering properties and the luminescent properties of LED product, and granule is the most unfavorable
In mixing uniformly with colloid, in limited range of the present invention, acquisition LED product can be made to have more excellent gamut range.
(5) a kind of white light LEDs preparation method, including step: the fluorescent material that S1, offer need uniformly mixes with colloid
Obtaining fluorescent glue, described fluorescent material uses phosphor combination described above to obtain；S2, by described fluorescent glue inject be provided with chip
LED support in, described fluorescent glue cover chip, toast described fluorescent glue so that it is solidification obtain LED product.The method can obtain
Must mix the uniform fluorescent glue of glue, the LED product using described fluorescent glue to be obtained has preferably light efficiency and color developing effect.
(6) in the most described white light LEDs preparation method, the fluorescent material percentage used be 30%～
When 50%, light efficiency corresponding to prepared acquisition LED product is higher, and the fluorescent material amount selecting this scope is preferable.
(7) in the present invention, the diameter of abrading-ball is too big, then be unable to reach the function of ball milling mix homogeneously；And ball radius
The least, fluorescent material may be ground, make the particle diameter of fluorescent material diminish, the requirement such as brightness being unfavorable for LED product.Cause
This, a diameter of the 3 of abrading-ball～10mm can make fluorescent material sufficiently mix with colloid, and will not make fluorescent powder crushing, this diameter
Under abrading-ball mixed effect optimal.
(8) in white light LEDs preparation method provided by the present invention, the temperature in described mixed glue stage is set to 30～60
DEG C, because at such a temperature, colloid viscosity is relatively low, is beneficial to mix, thus the fluorescent glue being uniformly mixed, uniform fluorescent glue
Obtain the more preferable LED product of color developing effect.
(9) in white light LEDs provided by the present invention, its excitation more preferably, closer to preferable white light.
(10) in white light LEDs provided by the present invention, described chip is blue chip or black light chip, by indigo plant
The fluorescent material of light or three kinds of colors of ultraviolet excitation can get three kinds of narrower absworption peaks corresponding to color, and the most whole spectrum tends to
In monochromatic spectrum, thus the white-light spectrum of the prepared white light LEDs obtained is more preferable.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all former in the present invention
Any amendment made within then, within equivalent and improvement etc. all should comprise protection scope of the present invention.
Claims (10)
1. one kind high colour gamut phosphor combination, it is characterised in that: include that mass ratio is (1～4): (0.5～2): (0.5～2)
Red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder, described red light fluorescent powder is potassium fluosilicate, and yellow fluorescent powder is yttroalumite
Garnet.
A kind of high colour gamut phosphor combination the most as claimed in claim 1, it is characterised in that: described green light fluorescent powder is halogen silicic acid
The mixture of one or more in salt, sulfide, silicate and nitrogen oxides.
A kind of high colour gamut phosphor combination the most as claimed in claim 2, it is characterised in that: described green light fluorescent powder can be further
For Sialon green light fluorescent powder, the mean diameter of described red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder be 5um～
30um。
4. the one high colour gamut phosphor combination as according to any one of claim 1-3, it is characterised in that: described fluorescent material group
Closing mass ratio is (1～3) further: (0.5～1.5): (0.5～1.5).
5. a white light LEDs preparation method, it is characterised in that: include weighing mass ratio for (1～4): (0.5～2): (0.5～2)
Red light fluorescent powder, green light fluorescent powder and yellow fluorescent powder and colloid be uniformly mixed to get fluorescent glue, wherein, described HONGGUANG fluorescence
Powder is potassium fluosilicate, and yellow fluorescent powder is yttrium-aluminium-garnet, and uses described fluorescent glue to prepare required white light further
LED。
6. a kind of white light LEDs preparation method as claimed in claim 5, it is characterised in that: described colloid is silica gel, described fluorescence
The quality of powder accounts for the 30%～50% of fluorescent material and silica gel gross mass.
7. a kind of white light LEDs preparation method as claimed in claim 5, it is characterised in that be mixed into ball milling mixing described in:, mixed
At least one abrading-ball, a diameter of the 3 of described abrading-ball～10mm is added during conjunction.
8. a kind of white light LEDs preparation method as claimed in claim 7, it is characterised in that: described ball milling mixing temperature is 30 DEG C
～60 DEG C.
9. a white light LEDs, it is characterised in that: include that fluorescent glue, described fluorescent glue are for (1～4) by mass ratio: (0.5～
2): red light fluorescent powder, green light fluorescent powder and the yellow fluorescent powder of (0.5～2), wherein, described red light fluorescent powder is potassium fluosilicate,
Yellow fluorescent powder is yttrium-aluminium-garnet.
10. a kind of white light LEDs as claimed in claim 9, it is characterised in that: described white light LEDs is by blue light or ultraviolet excitation
Gained.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922957A (en) * | 2018-06-27 | 2018-11-30 | 朗昭创新控股（深圳）有限公司 | Fluorescent glue, fluorescent film and preparation method thereof |
| CN110739382A (en) * | 2019-09-03 | 2020-01-31 | 浙江凯耀照明有限责任公司 | LED light-emitting devices with high color rendering index and high luminous efficiency |
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| CN105097999A (en) * | 2014-05-06 | 2015-11-25 | 四川新力光源股份有限公司 | LED light-emitting device and manufacturing method thereof |
| CN105659396A (en) * | 2013-10-18 | 2016-06-08 | 夏普株式会社 | Light-emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105659396A (en) * | 2013-10-18 | 2016-06-08 | 夏普株式会社 | Light-emitting device |
| CN105097999A (en) * | 2014-05-06 | 2015-11-25 | 四川新力光源股份有限公司 | LED light-emitting device and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108922957A (en) * | 2018-06-27 | 2018-11-30 | 朗昭创新控股（深圳）有限公司 | Fluorescent glue, fluorescent film and preparation method thereof |
| CN110739382A (en) * | 2019-09-03 | 2020-01-31 | 浙江凯耀照明有限责任公司 | LED light-emitting devices with high color rendering index and high luminous efficiency |
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