CN109671831A - A kind of full spectrum COB light source - Google Patents
A kind of full spectrum COB light source Download PDFInfo
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- CN109671831A CN109671831A CN201811292583.4A CN201811292583A CN109671831A CN 109671831 A CN109671831 A CN 109671831A CN 201811292583 A CN201811292583 A CN 201811292583A CN 109671831 A CN109671831 A CN 109671831A
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- 239000000843 powder Substances 0.000 claims abstract description 106
- 238000004806 packaging method and process Methods 0.000 claims abstract description 60
- 239000004033 plastic Substances 0.000 claims abstract description 60
- 239000000758 substrate Substances 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 230000005284 excitation Effects 0.000 claims description 31
- 239000013078 crystal Substances 0.000 claims description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 16
- 239000003292 glue Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000009877 rendering Methods 0.000 abstract description 14
- 230000003595 spectral effect Effects 0.000 abstract description 10
- 238000004088 simulation Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000741 silica gel Substances 0.000 description 12
- 229910002027 silica gel Inorganic materials 0.000 description 12
- 238000002310 reflectometry Methods 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007739 conversion coating Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 235000008434 ginseng Nutrition 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 241001025261 Neoraja caerulea Species 0.000 description 1
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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
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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
- H01L33/501—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
- 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
- H01L33/52—Encapsulations
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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
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
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Abstract
The present invention relates to a kind of full spectrum COB light source, the light conversion layer including substrate, at least two LED chips and all LED chips of covering；The LED chip includes at least one first blue-light LED chip and at least one second blue-light LED chip, and the wave-length coverage of first blue-light LED chip is 465-480nm, and the wave-length coverage of second blue-light LED chip is 440-460nm；The light conversion layer includes packaging plastic and the full spectrum fluorescent powder that is uniformly distributed in inside the packaging plastic.Full spectrum COB light source provided by the invention, full spectrum fluorescent powder is excited using the blue-light LED chip of two different wave lengths, colour gamut is higher, the problem that traditional COB light source spectral gamut is low, colour rendering index is low is breached, the true color of object and the health for being more advantageous to human eye can be preferably restored, on the other hand, it is arranged by different ratio formulas, the simulation of sunlight in different time periods is realized, all close to sunlight, health is comfortable for fidelity and saturation degree.
Description
Technical field
The present invention relates to a kind of LED encapsulation technology field more particularly to a kind of full spectrum COB light sources.
Background technique
LED as light source of new generation, have energy-saving and environmental protection, safety, service life length, low-power consumption, low-heat, high brightness, waterproof,
The features such as miniature, shockproof, easy light modulation, light beam concentration, easy maintenance, it can be widely applied to various instructions, display, decoration, back
The fields such as light source, general lighting.
COB light source encapsulation, i.e. chip on board encapsulate, and are one of bare chip mounting technologies, LED chip is mounted on printed wire
On plate, the electrical connection of chip and substrate is realized with lead sewing method, and is covered with resin to ensure reliability.With COB
The extensive use of illuminating product, people also increasingly pay attention to the performance of COB product and photochromic quality.It is most of currently on the market
The colour rendering index of COB product is not high (general colour rendering index Ra be lower than 70), poor to the color reducibility of object, seen in us
The object color arrived is easy distortion or colour cast, is not suitable for human eye vision preference.Therefore, it is necessary to propose a kind of novel COB light
Source solves problem above.
The present invention proposes a kind of full spectrum COB light source, and colour rendering index is high, preferably the reduction true color of object, favorably
In the health of human eye.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of full spectrum COB light sources, and colour rendering index is high, preferably reduzate
The true color of body, is conducive to the health of human eye.
In order to solve the above-mentioned technical problem, the present invention proposes a kind of full spectrum COB light source, including substrate, at least two LED
The light conversion layer of chip and all LED chips of covering；
The LED chip includes at least one first blue-light LED chip and at least one second blue-light LED chip, described
The wave-length coverage of first blue-light LED chip is 465-480nm, and the wave-length coverage of second blue-light LED chip is 440-
460nm；
The light conversion layer includes packaging plastic and the full spectrum fluorescent powder that is uniformly distributed in inside the packaging plastic；
The full spectrum fluorescent powder includes Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder,
Described in Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and the red light fluorescent powder weight ratio between packaging plastic respectively
Are as follows: 3-5%, 12-15%, 5-7% and 1-4%.
Preferably, the excitation wavelength of the Blue-green phosphor is 480-500nm, and the excitation wavelength of green light fluorescent powder is 520-
540nm, the excitation wavelength of yellow fluorescent powder are 560-575nm, and the excitation wavelength of red light fluorescent powder is 630-660nm.
Preferably, the green light fluorescent powder includes first wave length green light fluorescent powder and second wave length green light fluorescent powder, wherein
Weight ratio between the first wave length green light fluorescent powder and packaging plastic are as follows: 3-5%；
Weight ratio between the second wave length green light fluorescent powder and packaging plastic are as follows: 7-12%.
Preferably, the excitation wavelength of the first wave length green light fluorescent powder is 520-530nm；
The excitation wavelength of the second wave length fluorescent powder is 530-540nm.
Preferably, first blue-light LED chip and second blue-light LED chip interval are arranged；
The range of the ratio of number of the quantity of first blue-light LED chip and second blue-light LED chip are as follows:
25%-60%.
Preferably, the front of the substrate is provided with crystal bonding area, and the crystal bonding area is for installing the LED chip.
It preferably, further include box dam, the box dam is in closed hoop structure, is set to the front of the substrate and surrounds institute
State crystal bonding area.
Preferably, the box dam is made of white box dam glue, and the diameter of the box dam is 9~13mm, the box dam dam body
Width be 0.9~1.3mm.
Preferably, the substrate is metal substrate or ceramic substrate.
Preferably, the surface of the crystal bonding area is provided with high reflection layer.
Compared with prior art, the beneficial effects of the present invention are:
1, full spectrum COB light source provided by the invention excites full spectrum glimmering using the blue-light LED chip of two different wave lengths
Light powder, colour rendering index Ra are greater than 97, and colour gamut is higher, breaches that traditional COB light source spectral gamut is low, colour rendering index is low asks
Topic, can preferably restore the true color of object and the health for being more advantageous to human eye, on the other hand, be matched by different ratios
Side's setting, realizes the simulation of sunlight in different time periods, is all larger than 90 with the similarity degree Rf of sunlight, fidelity and
For saturation degree all close to sunlight, health is comfortable.
2, full spectrum COB light source provided by the invention, the crystal bonding area surface are provided with high reflection layer, the high reflection layer
Reflectivity be higher than 98%, the high reflection layer is that mirror surface aluminium layer for improving the reflectivity of COB light source improves the COB light
The light extraction efficiency in source.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the full spectrum COB light source of the present invention；
Fig. 2 is the spectral distribution curve figure of the embodiment of the present invention one；
Fig. 3 is the spectral distribution curve figure of the embodiment of the present invention two；
Fig. 4 is the spectral distribution curve figure of the embodiment of the present invention three.
Specific embodiment
It is with reference to the accompanying drawing and preferred real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying example, the present invention is described in further detail.
As shown in Figure 1, a kind of full spectrum COB light source, including substrate 1, at least two LED chips 2 and all LED of covering
The light conversion layer 3 of chip 2；
The LED chip 2 includes at least one the first blue-light LED chip 21 and at least one second blue-light LED chip 22,
The wave-length coverage of first blue-light LED chip 21 is 465-480nm, and the wave-length coverage of second blue-light LED chip 22 is
440-460nm；
The light conversion layer 3 includes packaging plastic and the full spectrum fluorescent powder being uniformly distributed in inside the packaging plastic.
The substrate 1 is metal substrate or ceramic substrate, and front is provided with crystal bonding area, and the crystal bonding area is for installing
LED chip 2, more preferably, the surface of the crystal bonding area are provided with high reflection layer, and the reflectivity of the high reflection layer is higher than 98%,
In the present embodiment, the high reflection layer is mirror surface aluminium layer, for improving the reflectivity of full spectrum COB light source, improves the full light
Compose the light extraction efficiency of COB light source.
The type of the LED chip 2 is two kinds, respectively the first blue-light LED chip 21 and the second blue-light LED chip 22,
The wave-length coverage 465-480nm of first blue-light LED chip 21, specifically, the wavelength of first blue-light LED chip 21 is
The wave-length coverage of 470nm, 472nm, 475nm or 478nm, second blue-light LED chip 22 are 440-460nm, specifically, institute
The wavelength for stating the second blue-light LED chip 22 is 445nm, 450nm or 455nm.Swashed respectively by the LED chip of different wavelength range
Full spectrum fluorescent powder is sent out, the light of approximate sunlight is issued convenient for full spectrum COB light source.
More preferably, in order to enable full spectrum COB light source issues the light of uniform approximate sunlight, first blue-ray LED
The proportional region of the quantity of the quantity of chip 21 and second blue-light LED chip 22 is 25%-60%, specifically, described the
The ratio of number of one blue-light LED chip 21 and second blue-light LED chip 22 is 30%, 40% or 50%, and is spaced setting,
Guarantee the light-emitting uniformity of the complete entire light-emitting surface of spectrum COB light source.
The light conversion layer 3 covers all LED chips 2, is used to for the blue light that the LED chip 2 issues being converted to white
Light, to obtain the light of full spectrum, the light conversion layer 3 includes packaging plastic and the full light being uniformly distributed in inside the packaging plastic
Fluorescent powder is composed, the packaging plastic is epoxy resin or silica gel, for encapsulating all LED chips 2, and all LED chips 2 are protected,
In the present embodiment, the packaging plastic is silica gel, due to the perfect heat-dissipating of silica gel, for improving the full spectrum COB light source
Heat dissipation performance.
The full spectrum fluorescent powder includes Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder.
Wherein, the weight ratio between the Blue-green phosphor and packaging plastic are as follows: 3-5%, specifically, the Blue-green phosphor
Weight between packaging plastic is 3.5%, 4% or 4.5%, excitation wavelength 480-500nm, specially 482nm, 484nm,
486nm or 488nm.
Weight ratio between the green light fluorescent powder and packaging plastic is 12-15%, specifically, the green light fluorescent powder includes
First wave length green light fluorescent powder and second wave length green light fluorescent powder, wherein the first wave length green light fluorescent powder and packaging plastic it
Between weight ratio are as follows: 3-5%, specifically, weight between the first wave length green light fluorescent powder and packaging plastic is 3.5%, 4%
Or 4.5%.The excitation wavelength of the first wave length green light fluorescent powder be 520-530nm, specially 522nm, 524nm, 526nm or
528nm。
Weight ratio between the second wave length green light fluorescent powder and packaging plastic are as follows: 7-12%, specifically, second wave
Weight between long green light fluorescent powder and packaging plastic is 8%, 9%, 10% or 11%.The excitation wave of the second wave length fluorescent powder
A length of 530-540nm, specially 532nm, 534nm, 536nm or 538nm.
Weight ratio between the yellow fluorescent powder and packaging plastic are as follows: 5-7%, specifically, the yellow fluorescent powder and envelope
Filling the weight between glue is 5.5%, 6% or 6.5%, excitation wavelength 560-575nm, specially 563nm, 568nm,
570nm or 572nm.
Weight ratio between the red light fluorescent powder and packaging plastic are as follows: 1-4%, specifically, the red light fluorescent powder and envelope
Filling the weight between glue is 1.5%, 2%, 2.5%, 3% or 3.5%, excitation wavelength 630-660nm, specially 635nm,
640nm, 645nm, 650nm or 655nm.
All LED chips can be smoothly covered for the ease of light conversion layer, further include box dam 4, the box dam 4 is in close ring
Shape structure is set to the front of the substrate 1 and surrounds the crystal bonding area.The box dam 4 is made of white box dam glue, described to enclose
The diameter on dam 4 is 9~13mm, and the width of the box dam dam body is 0.9~1.3mm, and specifically, the width of the box dam dam body is
0.9mm, 1.0mm, 1.1mm, 1.3mm.The present invention makes the box dam 4 using white box dam glue, for improving full spectrum COB light
The width of the reflectivity in source, the box dam dam body is set as 0.9~1.3mm, if the width of the box dam dam body is less than 0.9mm,
Then box dam 4 and the binding force of the substrate 1 are too small, are easy to fall off, the poor reliability of Quan Guangpu COB light source, if the box dam dam
The width of body is greater than 1.3mm, then occupies the excessive area of the substrate 1, be unfavorable for the Miniaturization Design of COB light source.
As in Figure 2-4, the present invention excites full spectrum fluorescent powder using the blue-light LED chip of two different wave lengths, obtains
White light, colour rendering index Ra is all larger than 95, is all larger than 90 with the similarity degree Rf of sunlight, colour gamut is higher, breaches tradition
The problem that COB light source spectral gamut is low, colour rendering index is low can preferably restore the true color of object and be more advantageous to human eye
Health.
Embodiment one
A kind of full spectrum COB light source, the light including substrate 1, at least two LED chips 2 and all LED chips 2 of covering
Conversion coating 3；
The LED chip 2 includes at least one the first blue-light LED chip 21 and at least one second blue-light LED chip 22,
The wavelength of first blue-light LED chip 21 is 465nm, and the wave-length coverage of second blue-light LED chip 22 is 440nm；
The light conversion layer 3 includes packaging plastic and the full spectrum fluorescent powder being uniformly distributed in inside the packaging plastic.
The substrate 1 is metal substrate or ceramic substrate, and front is provided with crystal bonding area, and the crystal bonding area is for installing
LED chip 2.
The type of the LED chip 2 is two kinds, respectively the first blue-light LED chip 21 and the second blue-light LED chip 22,
The proportional region of the quantity of first blue-light LED chip 21 and the quantity of second blue-light LED chip 22 is 25%, and
Every setting.
The light conversion layer 3 covers all LED chips 2, is used to for the blue light that the LED chip 2 issues being converted to white
Light, to obtain the light of full spectrum, the light conversion layer 3 includes packaging plastic and the full light being uniformly distributed in inside the packaging plastic
Fluorescent powder is composed, the packaging plastic is epoxy resin or silica gel, for encapsulating all LED chips 2, and all LED chips 2 are protected,
In the present embodiment, the packaging plastic is silica gel, due to the perfect heat-dissipating of silica gel, for improving the full spectrum COB light source
Heat dissipation performance.
The full spectrum fluorescent powder includes Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder.
Wherein, the weight ratio between the Blue-green phosphor and packaging plastic are as follows: 3%, excitation wavelength 480nm.
The green light fluorescent powder includes first wave length green light fluorescent powder and second wave length green light fluorescent powder, wherein described
Weight ratio between one wavelength green light fluorescent powder and packaging plastic are as follows: 3%, the excitation wavelength of the first wave length green light fluorescent powder is
520nm。
Weight ratio between the second wave length green light fluorescent powder and packaging plastic are as follows: 7%, the second wave length fluorescent powder
Excitation wavelength is 530nm.
Weight ratio between the yellow fluorescent powder and packaging plastic are as follows: 5%, excitation wavelength 560nm.
Weight ratio between the red light fluorescent powder and packaging plastic are as follows: 1%, excitation wavelength 630nm.
All LED chips can be smoothly covered for the ease of light conversion layer, further include box dam 4, the box dam 4 is in close ring
Shape structure is set to the front of the substrate 1 and surrounds the crystal bonding area.The box dam 4 is made of white box dam glue, described to enclose
The diameter on dam 4 is 9mm, and the width of the box dam dam body is 0.9mm.
As shown in Fig. 2, the figure is the spectral distribution curve figure that the present embodiment obtains, using the structure and ginseng of the present embodiment
Number has obtained the sunlight of 3000K colour temperature, and colour rendering index Ra is 98, and the similarity degree Rf with sunlight is 91, fidelity
With saturation degree all close to sunlight, health is comfortable.
Embodiment two
A kind of full spectrum COB light source, the light including substrate 1, at least two LED chips 2 and all LED chips 2 of covering
Conversion coating 3；
The LED chip 2 includes at least one the first blue-light LED chip 21 and at least one second blue-light LED chip 22,
The wavelength of first blue-light LED chip 21 is 480nm, and the wave-length coverage of second blue-light LED chip 22 is 460nm；
The light conversion layer 3 includes packaging plastic and the full spectrum fluorescent powder being uniformly distributed in inside the packaging plastic.
The substrate 1 is metal substrate or ceramic substrate, and front is provided with crystal bonding area, and the crystal bonding area is for installing
LED chip 2.
The type of the LED chip 2 is two kinds, respectively the first blue-light LED chip 21 and the second blue-light LED chip 22,
The proportional region of the quantity of first blue-light LED chip 21 and the quantity of second blue-light LED chip 22 is 60%, and
Every setting.
The light conversion layer 3 covers all LED chips 2, is used to for the blue light that the LED chip 2 issues being converted to white
Light, to obtain the light of full spectrum, the light conversion layer 3 includes packaging plastic and the full light being uniformly distributed in inside the packaging plastic
Fluorescent powder is composed, the packaging plastic is epoxy resin or silica gel, for encapsulating all LED chips 2, and all LED chips 2 are protected,
In the present embodiment, the packaging plastic is silica gel, due to the perfect heat-dissipating of silica gel, for improving the full spectrum COB light source
Heat dissipation performance.
The full spectrum fluorescent powder includes Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder.
Wherein, the weight ratio between the Blue-green phosphor and packaging plastic are as follows: 5%, excitation wavelength 500nm.
The green light fluorescent powder includes first wave length green light fluorescent powder and second wave length green light fluorescent powder, wherein described
Weight ratio between one wavelength green light fluorescent powder and packaging plastic are as follows: 5%, the excitation wavelength of the first wave length green light fluorescent powder is
530nm。
Weight ratio between the second wave length green light fluorescent powder and packaging plastic are as follows: 10%, the second wave length fluorescent powder
Excitation wavelength be 540nm.
Weight ratio between the yellow fluorescent powder and packaging plastic are as follows: 7%, excitation wavelength 575nm.
Weight ratio between the red light fluorescent powder and packaging plastic are as follows: 4%, excitation wavelength 660nm.
All LED chips can be smoothly covered for the ease of light conversion layer, further include box dam 4, the box dam 4 is in close ring
Shape structure is set to the front of the substrate 1 and surrounds the crystal bonding area.The box dam 4 is made of white box dam glue, described to enclose
The diameter on dam 4 is 9mm, and the width of the box dam dam body is 0.9mm.
As shown in figure 3, the figure is the spectral distribution curve figure that the present embodiment obtains, using the structure and ginseng of the present embodiment
Number has obtained the sunlight of 5700K colour temperature, and colour rendering index Ra is 98, and the similarity degree Rf with sunlight is 95, fidelity
With saturation degree all close to sunlight, health is comfortable.
Embodiment three
A kind of full spectrum COB light source, the light including substrate 1, at least two LED chips 2 and all LED chips 2 of covering
Conversion coating 3；
The LED chip 2 includes at least one the first blue-light LED chip 21 and at least one second blue-light LED chip 22,
The wavelength of first blue-light LED chip 21 is 475nm, and the wave-length coverage of second blue-light LED chip 22 is 447nm；
The light conversion layer 3 includes packaging plastic and the full spectrum fluorescent powder being uniformly distributed in inside the packaging plastic.
The substrate 1 is metal substrate or ceramic substrate, and front is provided with crystal bonding area, and the crystal bonding area is for installing
LED chip 2.
The type of the LED chip 2 is two kinds, respectively the first blue-light LED chip 21 and the second blue-light LED chip 22,
The proportional region of the quantity of first blue-light LED chip 21 and the quantity of second blue-light LED chip 22 is 60%, and
Every setting.
The light conversion layer 3 covers all LED chips 2, is used to for the blue light that the LED chip 2 issues being converted to white
Light, to obtain the light of full spectrum, the light conversion layer 3 includes packaging plastic and the full light being uniformly distributed in inside the packaging plastic
Fluorescent powder is composed, the packaging plastic is epoxy resin or silica gel, for encapsulating all LED chips 2, and all LED chips 2 are protected,
In the present embodiment, the packaging plastic is silica gel, due to the perfect heat-dissipating of silica gel, for improving the full spectrum COB light source
Heat dissipation performance.
The full spectrum fluorescent powder includes Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder.
Wherein, the weight ratio between the Blue-green phosphor and packaging plastic are as follows: 4%, excitation wavelength 490nm.
The green light fluorescent powder includes first wave length green light fluorescent powder and second wave length green light fluorescent powder, wherein described
Weight ratio between one wavelength green light fluorescent powder and packaging plastic are as follows: 4%, the excitation wavelength of the first wave length green light fluorescent powder is
525nm。
Weight ratio between the second wave length green light fluorescent powder and packaging plastic are as follows: 9%, the second wave length fluorescent powder
Excitation wavelength is 535nm.
Weight ratio between the yellow fluorescent powder and packaging plastic are as follows: 6%, excitation wavelength 565nm.
Weight ratio between the red light fluorescent powder and packaging plastic are as follows: 2%, excitation wavelength 640nm.
All LED chips can be smoothly covered for the ease of light conversion layer, further include box dam 4, the box dam 4 is in close ring
Shape structure is set to the front of the substrate 1 and surrounds the crystal bonding area.The box dam 4 is made of white box dam glue, described to enclose
The diameter on dam 4 is 9mm, and the width of the box dam dam body is 0.9mm.
As shown in figure 4, the figure is the spectral distribution curve figure that the present embodiment obtains, using the structure and ginseng of the present embodiment
Number has obtained the sunlight of 4000K colour temperature, and colour rendering index Ra is 97, and the similarity degree Rf with sunlight is 96, fidelity
With saturation degree all close to sunlight, health is comfortable.
Compared with prior art, the beneficial effects of the present invention are:
1, full spectrum COB light source provided by the invention excites full spectrum glimmering using the blue-light LED chip of two different wave lengths
Light powder, colour rendering index Ra are greater than 97, and colour gamut is higher, breaches that traditional COB light source spectral gamut is low, colour rendering index is low asks
Topic, can preferably restore the true color of object and the health for being more advantageous to human eye, on the other hand, be matched by different ratios
Side's setting, realizes the simulation of sunlight in different time periods, is all larger than 90 with the similarity degree Rf of sunlight, fidelity and
For saturation degree all close to sunlight, health is comfortable.
2, full spectrum COB light source provided by the invention, the crystal bonding area surface are provided with high reflection layer, the high reflection layer
Reflectivity be higher than 98%, the high reflection layer is that mirror surface aluminium layer for improving the reflectivity of COB light source improves the COB light
The light extraction efficiency in source.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of full spectrum COB light source, which is characterized in that including substrate, at least two LED chips and all LED cores of covering
The light conversion layer of piece；
The LED chip includes at least one first blue-light LED chip and at least one second blue-light LED chip, and described first
The wave-length coverage of blue-light LED chip is 465-480nm, and the wave-length coverage of second blue-light LED chip is 440-460nm；
The light conversion layer includes packaging plastic and the full spectrum fluorescent powder that is uniformly distributed in inside the packaging plastic；
The full spectrum fluorescent powder includes Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder, wherein institute
State the weight ratio of Blue-green phosphor, green light fluorescent powder, yellow fluorescent powder and red light fluorescent powder respectively between packaging plastic are as follows: 3-
5%, 12-15%, 5-7% and 1-4%.
2. full spectrum COB light source according to claim 1, which is characterized in that the excitation wavelength of the Blue-green phosphor is
480-500nm, the excitation wavelength of green light fluorescent powder are 520-540nm, and the excitation wavelength of yellow fluorescent powder is 560-575nm, red
The excitation wavelength of emitting phosphor is 630-660nm.
3. full spectrum COB light source according to claim 1 or 2, which is characterized in that the green light fluorescent powder includes first wave
Long green light fluorescent powder and second wave length green light fluorescent powder, wherein the weight between the first wave length green light fluorescent powder and packaging plastic
Measure ratio are as follows: 3-5%；
Weight ratio between the second wave length green light fluorescent powder and packaging plastic are as follows: 7-12%.
4. full spectrum COB light source according to claim 3, which is characterized in that the first wave length green light fluorescent powder swashs
Hair wavelength is 520-530nm；
The excitation wavelength of the second wave length fluorescent powder is 530-540nm.
5. full spectrum COB light source according to claim 1, which is characterized in that first blue-light LED chip and described the
The setting of two blue-light LED chip intervals；
The range of the ratio of number of the quantity of first blue-light LED chip and second blue-light LED chip are as follows: 25%-
60%.
6. full spectrum COB light source according to claim 1, which is characterized in that the front of the substrate is provided with crystal bonding area,
The crystal bonding area is for installing the LED chip.
7. full spectrum COB light source according to claim 6, which is characterized in that further include box dam, the box dam is in close ring
Shape structure is set to the front of the substrate and surrounds the crystal bonding area.
8. full spectrum COB light source according to claim 7, which is characterized in that the box dam is made of white box dam glue, institute
The diameter for stating box dam is 9~13mm, and the width of the box dam dam body is 0.9~1.3mm.
9. full spectrum COB light source according to claim 1, which is characterized in that the substrate is metal substrate or ceramic base
Plate.
10. full spectrum COB light source according to claim 6, which is characterized in that the surface of the crystal bonding area is provided with high anti-
Penetrate layer.
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| CN201811292583.4A CN109671831A (en) | 2018-11-01 | 2018-11-01 | A kind of full spectrum COB light source |
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| CN201811292583.4A CN109671831A (en) | 2018-11-01 | 2018-11-01 | A kind of full spectrum COB light source |
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| CN109671831A true CN109671831A (en) | 2019-04-23 |
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Application publication date: 20190423 |