CN109659421A - Luminescent device and lamps and lanterns with it - Google Patents
Luminescent device and lamps and lanterns with it Download PDFInfo
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- CN109659421A CN109659421A CN201811368145.1A CN201811368145A CN109659421A CN 109659421 A CN109659421 A CN 109659421A CN 201811368145 A CN201811368145 A CN 201811368145A CN 109659421 A CN109659421 A CN 109659421A
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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
- H01L33/508—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
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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
Abstract
The present invention provides a kind of luminescent device and with its lamps and lanterns.The luminescent device includes: light source；First fluorescent material layer, the light emission side for being at least partially arranged at light source in the first fluorescent material layer, for absorbing the emergent light of light source and issuing red light, the emission wavelength of the first fluorescent material layer is in the range of 620nm~640nm；Second fluorescent material layer, it is set to side of first fluorescent material layer far from light source, for absorbing the emergent light of light source and issuing the second color of light different from red light, and second fluorescent material layer emission wavelength less than the first fluorescent material layer emission wavelength, fluorescent powder is layered, the first fluorescent material layer by close to sources is set first to absorb the emergent light of light source, since the emission wavelength of the first fluorescent material layer is red shortwave, it is absorbed to reduce the light that the second fluorescence coating issues by the first fluorescent material layer, therefore greatly improves device brightness.
Description
Technical field
The present invention relates to optical technical fields, in particular to a kind of luminescent device and with its lamps and lanterns.
Background technique
Requirement with people to light quality increases, and the requirement that more and more applications can be photochromic to luminescent device is promoted,
Demand more than colour rendering index 90 (R90) is also being stepped up；However, for the luminescent device that can be realized R90 or more, due to
Its luminous efficiency is relatively low, is restricted so as to cause the application range of luminescent device.
Meanwhile for use fluorescent powder is as the luminescent device of luminescent material, due to the limitation of fluorescent powder wave band, show
Colour index can only accomplish R95/96 in high color temperature such as 6500K, also will use Blue-green phosphor in the prior art, by promoting 480
The spectrum of~520nm, Lai Tisheng colour rendering index, but since blue colour fluorescent powder can only receive blue light least a portion ofly, to cause
Luminous efficiency reduces rapider, and the brightness of device is caused to reduce, while fluorescent powder in the prior art is used in mixed way and causes
Mixing between fluorescent powder is uneven, and reabsorption etc. causes the luminous efficiency of device to reduce.
Summary of the invention
The main purpose of the present invention is to provide a kind of luminescent device and with its lamps and lanterns, to solve to adopt in the prior art
The problem of can not guaranteeing simultaneously colour rendering index and luminous efficiency with the luminescent device of fluorescent powder.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of luminescent device, comprising: light source；The
One fluorescent material layer, the light emission side for being at least partially arranged at light source in the first fluorescent material layer, for absorbing the outgoing of light source
Light simultaneously issues red light, and the peak luminous wavelength of the first fluorescent material layer is in the range of 620nm~640nm；Second phosphor
The bed of material is set to side of first fluorescent material layer far from light source, is different from red for absorbing the emergent light of light source and issuing
Second color of light of light, and the emission wavelength of the second fluorescent material layer is less than the emission wavelength of the first fluorescent material layer；Light source is
Blue light source, the first fluorescent material for forming the first fluorescent material layer is red fluorescence powder, forms the of the second fluorescent material layer
Two fluorescent materials are yellow fluorescent powder and/or yellowish green fluorescent powder.
Further, the partial size of the first fluorescent material is 10 μm~30 μm.
Further, the first fluorescent material includes nitride and/or sulfide.
Further, red fluorescence powder is selected from CaAlSiN3:Eu、SrAlSiN3:Eu、(Ca1-xSrx)AlSiN3:Eu、CaS:
Eu and
Ca (GeS): Eu is any one or more of.
Further, the peak luminous wavelength of the second fluorescent material is in the range of 530~550nm.
Further, the partial size of the second fluorescent material is 15 μm~50 μm.
Further, the second fluorescent material includes La3Si6N11:Ce:Y3Al5O12:Ce、Lu3Al5O12: Ce and (Y1-x
/Gax)3Al5O12: Ce is any one or more of.
Further, the first fluorescent material accounts for the 5%~20% of the weight percent of the second fluorescent material.
Further, luminescent device further includes transparent material layer, and transparent material layer is located at the first fluorescent material layer and second
Fluorescent material
Between layer, the sum of thickness of the first fluorescent material layer and transparent material layer is the 1/4~1 of the second fluorescent material layer.
Further, the first fluorescent material layer with a thickness of 50 μm~250 μm, transparent material layer with a thickness of 100 μm~
200 μm,
Second fluorescent material layer with a thickness of 400 μm~1000 μm.
According to another aspect of the present invention, a kind of lamps and lanterns are provided, including at least one at least one above-mentioned photophore
Part.
It applies the technical scheme of the present invention, provides a kind of luminescent device, including light source, the first fluorescent material layer and second
Fluorescent material layer, the light emission side for being at least partially arranged at light source in the first fluorescent material layer, the second fluorescent material layer are set to
Side of first fluorescent material layer far from light source, the second fluorescent material layer absorb the emergent light of light source and issue red light, and the
The emission wavelength of one fluorescent material layer is red shortwave, and peak luminous wavelength is in the range of 620~640nm, the first phosphor
The bed of material absorbs the emergent light of light source and issues the light of different colours, and the emission wavelength of the second fluorescent material layer is less than the first fluorescence
The emission wavelength of material layer.Luminescent device in the prior art is usually that the fluorescent powder (such as red fluorescence powder) of long wave is used to absorb
Shortwave blue-light LED chip shines, and rouge and powder fluorescent powder can not only absorb blue light, can also absorb fluorescent powder (such as yellow green of shortwave
Fluorescent powder) issue light, different fluorescent powders is mixed, can mutually be absorbed between fluorescent powder, to cause light energy
Loss.And the present invention makes the first fluorescent material layer by close to sources first absorb the emergent light of light source by the way that fluorescent powder to be layered, by
In the emission wavelength of the first fluorescent material layer be red shortwave, so that can absorb compared to red long wave being capable of light source emergent light
Energy, and be located at second fluorescent material layer on upper layer due to lesser emission wavelength, to reduce the light quilt of its sending
First fluorescent material layer absorbs, therefore greatly improves device brightness；Also, by the way that fluorescent powder to be layered, it is glimmering to reduce first
Mutual absorption between optical material layer and the second fluorescent material layer shows the spectrally ingredient of each layer luminescent color and the effect that shines
Rate will increase, to improve corresponding device brightness and colour rendering index with traditional blending processes of powders, device can be made to realize
Higher brightness.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows a kind of structural schematic diagram of luminescent device provided by the present invention；
Fig. 2 shows the structural schematic diagrams of another luminescent device provided by the present invention；
Fig. 3 shows the contrast schematic diagram of the relative spectral of luminescent device in embodiment 1 and comparative example 1；
Fig. 4 shows the contrast schematic diagram of the relative spectral of luminescent device in embodiment 9 and comparative example 1.
Wherein, the above drawings include the following reference numerals:
10, light source；20, the first fluorescent material layer；30, the second fluorescent material layer；40, transparent material layer.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
As background technique is introduced, it can not guarantee that colour developing refers to simultaneously using the luminescent device of fluorescent powder in the prior art
Several and luminous efficiency.In order to solve technical problem as above, the invention proposes a kind of luminescent devices, as illustrated in fig. 1 and 2, including
Light source, the first fluorescent material layer 20 and the second fluorescent material layer 30 are at least partially arranged at light in first fluorescent material layer 20
The light emission side in source, for absorbing the emergent light of light source and issuing red light, the peak luminous wavelength of the first fluorescent material layer is 620
In the range of~640nm；Second fluorescent material layer 30 is set to the first side of the fluorescent material layer 20 far from light source, for absorbing
The emergent light of light source simultaneously issues the second color of light for being different from red light, and the peak luminous wavelength of the second fluorescent material layer 30 is small
In the peak luminous wavelength of the first fluorescent material layer 20.
The present invention makes the first fluorescent material layer 20 by close to sources first absorb the outgoing of light source by the way that fluorescent powder to be layered
Light, since the peak luminous wavelength of the first fluorescent material layer 20 is red shortwave, so that energy can be absorbed compared to red long wave
The energy of enough light source emergent lights, and it is located at second fluorescent material layer 30 on upper layer due to lesser peak luminous wavelength, from
And the light for reducing its sending is absorbed by the first fluorescent material layer 20, therefore greatly improves device brightness；Also, passing through will be glimmering
The layering of light powder, reduces the mutual absorption between the first fluorescent material layer 20 and the second fluorescent material layer 30, the luminous effect of fluorescent powder
Rate will increase, to device can be made to realize higher brightness with traditional blending processes of powders.
In above-mentioned luminescent device of the invention, due to generalling use blue light source in luminescent device, in order to guarantee
First fluorescent material layer 20 and the second fluorescent material layer 30 can issue the light of different colours under the excitation of light source, a kind of excellent
In the embodiment of choosing, light source is blue light source, and the first fluorescent material for forming the first fluorescent material layer 20 is red fluorescence powder,
The second fluorescent material of the second fluorescent material layer 30 is formed as yellow fluorescent powder and/or yellowish green fluorescent powder, it is further preferable that the
The peak luminous wavelength of two fluorescent materials is in the range of 530-550nm.
In above-mentioned preferred embodiment, in order to which the light of optimal promotion LED light emitting device is logical, it is further preferable that the
The partial size of one fluorescent material is 10 μm~30 μm；The partial size of second fluorescent material is 15 μm~50 μm.
When above-mentioned first fluorescent material is red fluorescence powder, it is preferable that the first fluorescent material includes nitride and/or sulphur
Compound, the first fluorescent material are selected from CaAlSiN3:Eu、SrAlSiN3:Eu、(Ca1-xSrx)AlSiN3: Eu, CaS:Eu and Ca
(GeS): Eu is any one or more of；When above-mentioned second fluorescent material be yellow fluorescent powder and/or
When yellowish green fluorescent powder, the second fluorescent material includes La3Si6N11:Ce:Y3Al5O12:Ce、Lu3Al5O12: Ce and (Y1-x/Gax)3Al5O12: Ce is any one or more of.Selection above-mentioned material can make the first fluorescent material to be formed and the second fluorescent material
With preferable luminescent properties, above-mentioned first fluorescent material and the second fluorescent material are not limited to above-mentioned preferred material, this
Field technical staff can choose according to actual needs.
In above-mentioned luminescent device of the invention, it is preferable that the first fluorescent material accounts for the weight percent of the second fluorescent material
Than being 5%~20%.Using the specific gravity of above-mentioned preferred two kinds of fluorescent materials, the luminescent spectrum group of above-mentioned luminescent device is optimized
At further improving the luminous efficiency of luminescent device, improve the brightness of device.
In a preferred embodiment, luminescent device further includes transparent material layer 40, as shown in Figure 1, transparent material
Layer 40 is between the first fluorescent material layer 20 and the second fluorescent material layer 30.Above-mentioned transparent material layer 40 is by by the first fluorescence
Material layer 20 is isolated with the second fluorescent material layer 30, and the first fluorescent material layer 20 and second after capable of being effectively prevented layering are glimmering
Optical material layer 30 as material spread and caused by colour mixture；Also, above-mentioned transparent material layer 40 can also ensure that from light source and
The transmission of the emergent light of second fluorescent material layer 30.In order to guarantee the high transmittance of above-mentioned transparent material layer 40, formed above-mentioned
The material of bright material layer 40 can be any one or more of selected from silica gel, silicone resin and epoxy resin etc., but is not limited to
Mentioned kind, those skilled in the art can carry out Rational choice according to the prior art.
In above-mentioned preferred embodiment, in order to guarantee the mutual suction between first layer fluorescent powder and second layer fluorescent powder
It receives light action to reduce, and guarantees that blue light can effectively excite second layer fluorescent powder to promote light efficiency, it is further preferable that first is glimmering
The sum of thickness of optical material layer 20 and transparent material layer 40 is the 1/4~1 of the second fluorescent material layer 30, it is further preferable that first
Fluorescent material layer 20 with a thickness of 50 μm~250 μm, transparent material layer 40 with a thickness of 100 μm~200 μm, the second fluorescent material
Layer 30 with a thickness of 400 μm~1000 μm.
According to another aspect of the present invention, a kind of lamps and lanterns are additionally provided, the lamps and lanterns include at least one above-mentioned at least one
A luminescent device.
Below in conjunction with specific embodiment, present invention is further described in detail, these embodiments should not be understood as limitation originally
Invent range claimed.
Embodiment 1
The technical solution of the present embodiment luminescent device construction is as follows:
The luminescent device of the present embodiment includes light source, the first fluorescent material layer, the second fluorescent material layer and transparent material layer,
First fluorescent material layer is set to the light emission side of light source, and the second fluorescent material layer is set to the first fluorescent material layer far from light source
Side, transparent material layer is between the first fluorescent material layer and the second fluorescent material layer.Wherein, the first fluorescent material is red
Fluorescent powder, peak luminous wavelength are 620nm~640nm, and partial size is 20 μm；Second fluorescent material is yellowish green fluorescent powder, is shone
Peak wavelength is 530nm~540nm, and partial size is 35 μm；The weight ratio of first fluorescent material and the second fluorescent material is 15:85,
First fluorescent material layer with a thickness of 50 μm, transparent material layer with a thickness of 100 μm, the second fluorescent material layer with a thickness of 400 μ
m。
Embodiment 2
The luminescent device of the present embodiment the difference from embodiment 1 is that:
The partial size of first fluorescent material is 30 μm, and the partial size of the second fluorescent material is 50 μm.
Embodiment 3
The luminescent device of the present embodiment the difference from embodiment 1 is that:
The partial size of first fluorescent material is 5 μm, and the partial size of the second fluorescent material is 10 μm.
Embodiment 4
The luminescent device of the present embodiment the difference from embodiment 1 is that:
The weight percent that first fluorescent material accounts for the second fluorescent material is 5%.
Embodiment 5
The luminescent device of the present embodiment the difference from embodiment 1 is that:
The weight percent that first fluorescent material accounts for the second fluorescent material is 20%.
Embodiment 6
The luminescent device of the present embodiment the difference from embodiment 1 is that:
The weight percent that first fluorescent material accounts for the second fluorescent material is 25%.
Embodiment 7
The luminescent device of the present embodiment the difference from embodiment 1 is that:
First fluorescent material layer with a thickness of 40 μm, transparent material layer with a thickness of 100 μm, the thickness of the second fluorescent material layer
Degree is 600 μm.
Embodiment 8
The luminescent device of the present embodiment the difference from embodiment 1 is that:
First fluorescent material layer with a thickness of 250 μm, transparent material layer with a thickness of 200 μm, the second fluorescent material layer
With a thickness of 1000 μm.
Embodiment 9
The technical solution of the present embodiment luminescent device construction is as follows:
The luminescent device of the present embodiment includes light source, the first fluorescent material layer, the second fluorescent material layer and transparent material layer,
First fluorescent material layer is set to the light emission side of light source, and the second fluorescent material layer is set to the first fluorescent material layer far from light source
Side, transparent material layer is between the first fluorescent material layer and the second fluorescent material layer.Wherein, the first fluorescent material is red
Fluorescent powder, for peak luminous wavelength within the scope of 620nm~640nm, partial size is 20 μm；Second fluorescent material is yellow-green fluorescence
Powder, for peak luminous wavelength within the scope of 530nm~540nm, partial size is 30 μm；The weight of first fluorescent material and the second fluorescent material
Amount than be 15:85, the first fluorescent material layer with a thickness of 150 μm, transparent material layer with a thickness of 150 μm, the second fluorescent material
Layer with a thickness of 650 μm.
Comparative example 1
The technical solution of this comparative example luminescent device construction is as follows:
The luminescent device of this comparative example includes light source, fluorescent material layer, and fluorescent material layer is set to the light emission side of light source, glimmering
Optical material layer is mixed by the first fluorescent material and the second fluorescent material.Wherein, the first fluorescent material is red fluorescence powder, hair
For peak wavelength within the scope of 620nm~640nm, partial size is 20 μm；Second fluorescent material is yellowish green fluorescent powder, luminescence peak
For wavelength in 530nm~540nm range, partial size is 35 μm；The weight ratio of first fluorescent material and the second fluorescent material is 15:85,
Fluorescent material layer with a thickness of 1mm.
Comparative example 2
The technical solution of this comparative example luminescent device construction is as follows:
The luminescent device of this comparative example includes light source, the first fluorescent material layer, the second fluorescent material layer and transparent material layer,
First fluorescent material layer is set to the light emission side of light source, and the second fluorescent material layer is set to the first fluorescent material layer far from light source
Side, transparent material layer is between the first fluorescent material layer and the second fluorescent material layer.Wherein, the first fluorescent material is red
Fluorescent powder, for peak luminous wavelength within the scope of 650nm~660nm, partial size is 20 μm；Second fluorescent material is yellow-green fluorescence
Powder, for peak luminous wavelength within the scope of 530nm~540nm, partial size is 35 μm；The weight of first fluorescent material and the second fluorescent material
Amount than be 10:90, the first fluorescent material layer with a thickness of 50 μm, transparent material layer with a thickness of 100 μm, the second fluorescent material layer
With a thickness of 400 μm.
The brightness of luminescent device in above-described embodiment 1 to 9, comparative example 1 to 2, compared to the brightness gain of comparative example 1 and aobvious
Colour index is shown in Table 1.
Table 1
Through above table as can be seen that in the case where proportion, the partial size etc. of chip, two kinds of fluorescent powders are the same, this hair
Technical solution is than 8% or more prior art luminance raising in comparative example 1 in bright middle embodiment 1；And pass through above table
As can be seen that by embodiment 3, embodiment 4 and embodiment 5 as can be seen that the increase matched with the first fluorescent powder, brightness meeting
It gradually decreases, but colour rendering index will increase, therefore difference can be realized by the proportion of the first fluorescent powder and the second fluorescent powder
Brightness and colour rendering index adjusting, the technical solution brightness of embodiment 6 and embodiment 7 is lower than 1 prior art of comparative example,
Therefore the proportion and the first fluorescent material of embodiment 6 and 7 comparative example 1 of embodiment and visible first fluorescent material of embodiment 8
Layer, hyaline layer, second material layer thickness have larger impact to the brightness of device, therefore to the weight of fluorescent material in the present invention
Proportion, the partial size of fluorescent powder, the first fluorescent material layer and hyaline layer and the thickness of second material layer etc. have carried out scope limitation, with
Guarantee that technical solution within the scope of the present invention has preferable brightness.It can by the data of embodiment 1 and comparative example 2
Different in red fluorescence powder wavelength to find out, in the identical situation of other situations, the brightness of embodiment 1 is higher than comparative example 1, but
The display index of embodiment 1 is lower than comparative example 1, it is known that the wavelength of the red fluorescence powder of use is different, the brightness and colour developing of device
Index is different, and colour rendering index can be improved in the red fluorescence powder of long-wave band.
The contrast schematic diagram of the relative spectral of luminescent device is as shown in figure 3,1 to use in figure in embodiment 1 and comparative example 1
The relative spectral curve of luminescent device in the embodiment 1 of above-mentioned technical proposal of the present invention, 2 be conventional light emitting device in comparative example 1
Relative spectral curve.From figure 3, it can be seen that the spectrum relative to conventional light emitting device in comparative example 1, using in the present invention
Stating the spectrum of luminescent device in the embodiment 1 of technical solution has a higher luminous intensity in 500nm~550nm, while
600nm~630nm can also have higher luminous intensity, this two-part luminous intensity increases, and can directly promote lamp bead
The logical lumen value of light, realize the highlighted of device.
Also, the relative spectral of luminescent device in comparing embodiment 9 and comparative example 1 is such as schemed under the excitation of identical blue light
Shown in 4, in figure 1 be using above-mentioned technical proposal of the present invention embodiment 9 in luminescent device relative spectral curve, 2 for compare
The relative spectral curve of conventional light emitting device in example 1, position meeting of the relative spectral of luminescent device in red band in embodiment 9
Blue shift 10nm~20nm realizes the color developing effect same with traditional scheme in comparative example 1, however brightness is compared with comparative example 1
It is able to ascend 6% or more light efficiency.The cartographic represenation of area of dash area shown by 3 in Fig. 4 embodiment 9 is realized in 470nm
It is obviously improved to~650nm wave band light energy, the energy of this part realizes the effect of luminance raising.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
1, the present invention makes the first fluorescent material layer by close to sources first absorb the outgoing of light source by the way that fluorescent powder to be layered
Light, since the emission wavelength of the first fluorescent material layer is red shortwave, so that light source outgoing can be absorbed compared to red long wave
The energy of light, and it is located at second fluorescent material layer on upper layer due to lesser emission wavelength, to reduce the light of its sending
It is absorbed by the first fluorescent material layer, therefore greatly improves device brightness.
2, the present invention is reduced mutual between the first fluorescent material layer and the second fluorescent material layer by the way that fluorescent powder to be layered
It absorbs, the luminous efficiency of fluorescent powder will increase, to device can be made to realize higher brightness with traditional blending processes of powders.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of luminescent device characterized by comprising
Light source (10)；
First fluorescent material layer (20), in first fluorescent material layer (20) be at least partially arranged at the light source go out light
Side, for absorbing the emergent light of the light source and issuing red light, the peak luminous wavelength of first fluorescent material layer (20)
In the range of 620nm~640nm；
Second fluorescent material layer (30) is set to side of first fluorescent material layer (20) far from the light source, for inhaling
It receives the emergent light of the light source and issues the second color of light for being different from red light, and the hair of second fluorescent material layer (30)
Optical wavelength is less than the emission wavelength of first fluorescent material layer (20)；
The light source is blue light source, and the first fluorescent material for forming first fluorescent material layer (20) is red fluorescence powder,
The second fluorescent material for forming second fluorescent material layer (30) is yellow fluorescent powder and/or yellowish green fluorescent powder.
2. luminescent device according to claim 1, which is characterized in that the partial size of first fluorescent material is 10 μm~30
μm。
3. luminescent device according to claim 2, which is characterized in that first fluorescent material include nitride and/or
Sulfide.
4. luminescent device according to claim 3, which is characterized in that first fluorescent material is selected from CaAlSiN3:Eu、
SrAlSiN3:Eu、(Ca1-xSrx)AlSiN3: Eu, CaS:Eu and Ca (GeS): Eu is any one or more of.
5. luminescent device according to claim 1, which is characterized in that the peak luminous wavelength of second fluorescent material exists
In the range of 530~550nm.
6. luminescent device according to claim 1, which is characterized in that the partial size of second fluorescent material is 15 μm~50
μm。
7. luminescent device according to claim 5 or 6, which is characterized in that the second fluorescent material includes La3Si6N11:Ce:
Y3Al5O12:Ce、Lu3Al5O12: Ce and (Y1-x/Gax)3Al5O12: Ce is any one or more of.
8. luminescent device according to claim 1, which is characterized in that first fluorescent material accounts for second phosphor
The 5%~20% of the weight percent of material.
9. luminescent device according to claim 1, which is characterized in that the luminescent device further includes transparent material layer
(40), the transparent material layer (40) be located at first fluorescent material layer (20) and second fluorescent material layer (30) it
Between, the sum of thickness of first fluorescent material layer (20) and the transparent material layer (40) is second fluorescent material layer
(30) 1/4~1.
10. luminescent device according to claim 9, which is characterized in that first fluorescent material layer (20) with a thickness of
50 μm~250 μm, the transparent material layer (40) with a thickness of 100 μm~200 μm, the thickness of second fluorescent material layer (30)
Degree is 400 μm~1000 μm.
11. a kind of lamps and lanterns, which is characterized in that including luminescent device described at least one any one of claims 1 to 10.
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| JP2018137321A (en) * | 2017-02-21 | 2018-08-30 | シャープ株式会社 | Light-emitting device and image display device |
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Application publication date: 20190419 |