CN108613022A - Low blue light harm LED light source and preparation method thereof and lamps and lanterns - Google Patents
Low blue light harm LED light source and preparation method thereof and lamps and lanterns Download PDFInfo
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- CN108613022A CN108613022A CN201611140829.7A CN201611140829A CN108613022A CN 108613022 A CN108613022 A CN 108613022A CN 201611140829 A CN201611140829 A CN 201611140829A CN 108613022 A CN108613022 A CN 108613022A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
Abstract
The present invention relates to a kind of low blue light harm LED light sources and preparation method thereof and the lamps and lanterns containing the low blue light harm LED light source.The low blue light harm LED light source includes blue light excitation LED chip, fluorescent powder, blue light compensation LED chip and mixed light mechanism.The low blue light harm LED light source and preparation method thereof and lamps and lanterns compensate the white light progress blue light compensation that LED chip is sent out with the white light LEDs lighting means to low related color temperature by the way that blue light is arranged, because compensation blue light peak wavelength between 460nm~480nm, therefore, the blue light of compensation is smaller to the injury of eye retina, and the blue light compensated can make entire LED light source reach correlated colour temperature, light efficiency and colour rendering index needed for the occasions such as reading, be particularly advantageous to improve colour rendering index.
Description
Technical field
The present invention relates to field of light fittings, more particularly, to a kind of aobvious LED light source referred to of the low blue light harm height of specular removal and its
Production method and the lamps and lanterns containing the low blue light harm LED light source.
Background technology
Light emitting diode (Light Emitting Diode, LED) is a kind of solid state semiconductor devices, it can be direct
Electric energy is converted into luminous energy.For white light LEDs lighting means, most common at present excited using the blue light that blue chip is sent out
Fluorescent powder sends out green-yellow light, then with the remaining blue light of chip at white light.Such luminous mechanism has light efficiency high and environmental protection
Etc. more advantages, but also under cover safety issue, such as blue light harm.Typical blue chip excitated fluorescent powder generates white light
LED, spectrum 500nm or less usually can have comparable power level there are one blue light wave crest in 445~455nm.For height
Correlated colour temperature light source, blue light wavelength is shorter or blue peak is higher, and blue ray radiation dosage is higher, and blue ray radiation dosage is higher,
Especially blue light of the peak wavelength between 435~440nm is easy to generate human eye certain harm, and traditional way is drop
The correlated colour temperature of low light source.The white light LEDs lighting means of low related color temperature are (such as<It is blue although 3000K) blue ray radiation energy is very low
Light endangers very little, but the too low clarity for being unfavorable for reading of correlated colour temperature, colour rendering index are relatively low.
Invention content
Based on this, it is necessary to provide a kind of lower low blue light harm LED light source of the long blue ray radiation dosage of spectrum intermediate waves
And preparation method thereof and lamps and lanterns.
A kind of low blue light harm LED light source, including blue light excitation LED chip, fluorescent powder, blue light compensate LED chip and mix
Ray machine structure；The blue light excitation LED chip is matched with the fluorescent powder constitutes white light LEDs lighting means, the blue light excitation
The some blue light that LED chip generates is used to excite the light-emitting phosphor, and with remaining blue light at white light；The white light
The correlated colour temperature for the white light that LED lighting means generate is not higher than 2800K；The peak for the blue light that the blue light compensation LED chip is sent out
Value wavelength or the blue light that sends out are through the filtered peak wavelength of optical filter between 460nm~480nm；The mixed light mechanism uses
The blue light that is sent out in the white light that generates the white light LEDs lighting means and blue light compensation LED chip or will it is described in vain
The white light that light LED lighting means generate carries out mixed light processing with through the filtered blue light of the optical filter.
The fluorescent powder is yellowish green fluorescent powder and red fluorescence powder in one of the embodiments,.
The correlated colour temperature for the white light that the white light LEDs lighting means generate in one of the embodiments, 2500~
Between 2800K.
Blue light harm efficiency is less than 3W/Klm at 3000K in one of the embodiments, and 4W/ is less than at 4000K
Klm is less than 5W/Klm at 5000K, and 6W/Klm is less than at 6000K.
The colour rendering index of the LED light source is not less than 90 in one of the embodiments,.
A kind of lamps and lanterns, including the low blue light harm LED light source described in any of the above-described embodiment.
The lamps and lanterns further include cooling mechanism in one of the embodiments, and the low blue light harm LED light source is installed on
On the cooling mechanism.
A kind of production method of low blue light harm LED light source, in the white light that blue light excitation LED chip is constituted with fluorescent powder
Blue light compensation LED chip and mixed light mechanism are added on the basis of LED lighting means, or add blue light compensation LED chip, optical filter
With mixed light mechanism；The some blue light that the blue light excitation LED chip generates is used to excite the light-emitting phosphor, and blue with residue
Light is mixed into white light；The correlated colour temperature for the white light that the white light LEDs lighting means generate is not higher than 2800K；The blue light compensation
The peak wavelength for the blue light that LED chip is sent out or the blue light that sends out through the filtered peak wavelength of optical filter 460nm~
Between 480nm；The white light that the mixed light mechanism is used to generate the white light LEDs lighting means compensates LED core with the blue light
The blue light or carry out the white light of white light LEDs lighting means generation with through the filtered blue light of the optical filter that piece is sent out
Mixed light processing.
The correlated colour temperature for the white light that the white light LEDs lighting means generate in one of the embodiments, 2500~
Between 2800K.
The fluorescent powder is yellowish green fluorescent powder and red fluorescence powder in one of the embodiments,.
The LED of white light is produced for typical blue light excitation LED chip excitated fluorescent powder, and there is no completely without blue light
Possibility because for luminous mechanism, if blue light is without residue after laser fluorescence powder, then the light that independent fluorescent powder is sent out is
It can not mix and generate white light, it is therefore, high for the long blue ray radiation dosage of spectrum intermediate waves existing for traditional LED light source, especially
It is peak wavelength 435nm between 440nm to the maximum short wavelength's blue light of eye retina occurrence situation, and in order to
It reduces blue ray radiation and reduces the problem that colour rendering index is low caused by the correlated colour temperature of white light LEDs lighting means, above-mentioned low blue light
It endangers LED light source and preparation method thereof and compensates LED chip by the way that blue light is arranged with the lamps and lanterns containing the low blue light harm LED light source
Blue light compensation is carried out with the white light that the white light LEDs lighting means to low related color temperature are sent out, because the blue light of compensation (can be specific
The blue light blue light that directly sends out of compensation LED chip or the blue light that sends out of general blue light compensation LED chip filter through specific
Piece filter after blue light) peak wavelength between 460nm~480nm, therefore, the injury of the blue light of compensation to eye retina
It is smaller, and the blue light compensated can be such that entire low blue light harm LED light source reaches correlated colour temperature needed for occasions, the light such as to read
Effect and colour rendering index are particularly advantageous to improve colour rendering index.
Description of the drawings
Fig. 1 is the structural schematic diagram of the low blue light harm LED light source of an embodiment；
Fig. 2 is the optical filter light transmission function schematic diagram of low blue light harm LED light source shown in Fig. 1；
Fig. 3 is the filter effect schematic diagram of the optical filter of low blue light harm LED light source shown in Fig. 1；
Fig. 4 is the light mixing effect schematic diagram of low blue light harm LED light source shown in Fig. 1；
Fig. 5 is the structural schematic diagram of the low blue light harm LED light source of another embodiment；
Fig. 6 is the light mixing effect schematic diagram of low blue light harm LED light source shown in Fig. 5.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give presently preferred embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.Keep the understanding to the disclosure more thorough on the contrary, purpose of providing these embodiments is
Comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the Listed Items of pass.
As shown in Figure 1, the low blue light harm LED light source 100 of an embodiment includes blue light excitation LED chip 110, fluorescent powder
120, blue light compensation LED chip 130, optical filter 140 and mixed light mechanism 150.
Blue light excitation LED chip 110 is matched with fluorescent powder 120 constitutes white light LEDs lighting means, and wherein blue light excites
The blue light components that LED chip 110 is sent out shine for excitated fluorescent powder 120, and yellowish green fluorescent powder is such as excited to send out green-yellow light, swash
Hair red fluorescence powder sends out feux rouges etc., the remaining blue light that the light that fluorescent powder 120 is sent out is sent out with blue light excitation LED chip 110
White light is formed after (removing the blue light for 120 luminous component of excitated fluorescent powder) mixing.The white light LEDs light emitting machine of the present embodiment
Structure has lower correlated colour temperature, is such as less than 2800K, preferably between 2500K~2800K, to form the white of low related color temperature
Radiant, wherein the short wavelength's blue ray radiation energy contained is very low, blue light harm is small.
The white light for the low related color temperature that blue light compensation LED chip 130 is used to send out white light LEDs lighting means carries out blue light
Compensation.The effect that blue light compensates LED chip 130 is different from blue light excitation LED chip 110, and blue light excitation LED chip 110 is used for
Independent excitated fluorescent powder 120 shines, and coordinates generation white light, and blue light compensation LED chip 130 is then not used in excitated fluorescent powder
120 shine, and only carry out blue light benefit to blue light excitation LED chip 110 and the white light LEDs lighting means that fluorescent powder 120 is constituted
It repays.
In the present embodiment, blue light compensation LED chip 130 can select general blue-light LED chip, the blue light sent out
Peak wavelength wider range, such as can be between 400~500nm.To realize that blue light compensation, the present embodiment are compensated using blue light
LED chip 130 and 140 matched mode of optical filter compensate the blue light that LED chip 130 is sent out by optical filter 140 to blue light
Carry out optical filtering screening, such as filter out peak wavelength between 460nm~480nm (including 460nm and/or 480nm) blue light.
In the present embodiment, optical filter 140, which is selected, has the effect that filters shown in filter function curve and Fig. 3 as shown in Figure 2
The optical filter of fruit, the optical filter are less than peak wavelength the substantially impervious mistake of light of 460nm, to peak wavelength in 500nm or so and
Above light has very strong light transmittance.
Mixed light mechanism 150 be used for the white light that generates white light LEDs lighting means with through 140 filtered blue light of optical filter into
Row mixed light processing, to generate the white light of blue light compensation.Fig. 4 show the light mixing effect figure of the present embodiment, wherein white light LEDs are sent out
The white light correlated colour temperature that ray machine structure generates is between 2700~2800K, 85 or more colour rendering index, the compensation blue peak after optical filtering
Wavelength is 470 ± 5nm, and 2 peak strength of blue light is about 2~3 times of 1 peak strength of blue light.From fig. 4, it can be seen that due to
The correlated colour temperature for the white light that white light LEDs lighting means are sent out is relatively low, thus the remaining short wavelength that blue light excitation LED chip generates is blue
Light is also less, and the blue ray radiation energy is very low, blue light harm very little, and compensates the blue light pair that LED chip is sent out by blue light
The white light that white light LEDs lighting means are sent out compensates, and entire low blue light harm LED light source can be improved after mixed light is handled
The colour rendering index of 100 white lights sent out, to meet a variety of occasion demands more demanding to colour rendering.
As shown in figure 5, low 200 structure of blue light harm LED light source in another embodiment is substantially the same as implementation shown in FIG. 1
Example, the low blue light harm LED light source 200 include blue light excitation LED chip 210, fluorescent powder 220, blue light compensation LED chip 230
And mixed light mechanism 250.The structure of the low blue light harm LED light source 200 substantially low blue light harm LED light source 100 in Fig. 1,
The difference is that low blue light harm LED light source 200 does not contain optical filter, blue light compensation LED chip 230 therein is using special
Fixed blue-light LED chip, can such as send out peak wavelength between 460nm~480nm (including 460nm and/or 480nm) indigo plant
The LED chip of light.Fig. 6 is the light mixing effect schematic diagram of low blue light harm LED light source 200, wherein white light LEDs lighting means produce
Raw white light correlated colour temperature is between 2700~2800K, 85 or more colour rendering index, and the blue light peak wavelength of compensation is 470 ±
5nm, and 2 peak strength of blue light is about 2~3 times of 1 peak strength of blue light.From fig. 6, it can be seen that the low blue light harm LED
The low wavelength blue content of light source 200 is low, and corresponding radianting capacity is low, and blue light harm is small, and due to having blue light compensation, colour developing to refer to
Number is high.
The blue light harm efficiency of Fig. 1 and low blue light harm LED light source shown in fig. 5 is satisfied by KB,ν＜ 3W/Klm@3000K.
Blue light harm efficiency refers to that the quotient of blue light harm amount and corresponding light quantity, calculation formula are as follows：
Wherein, Km=683lm/W, φλ(λ) is the radiation flux of each corresponding wavelength, and B (λ) is blue light harm weighting function, V
(λ) is visual effect function.
The colour rendering index of Fig. 1 and low blue light harm LED light source shown in fig. 5 is relatively high, can reach 90 or more.This is low
Blue light harm LED light source can be widely applied in lamps and lanterns, such as reading lamp, and it is excellent to have that colour rendering index is high, blue light harm is small etc.
Point.In corresponding lamps and lanterns, low blue light harm LED light source can be placed on cooling mechanism, coordinate other fitting structure structures
At lighting lamp.
In addition, the present invention also provides a kind of production method of low blue light harm LED light source, which passes through in indigo plant
Light adds blue light compensation LED chip and mixed light machine on the basis of exciting the white light LEDs lighting means that LED chip is constituted with fluorescent powder
Structure, or blue light compensation LED chip, optical filter and mixed light mechanism are added to realize.The part that blue light excites LED chip to generate is blue
Light shines for excitated fluorescent powder, and with remaining blue light at white light.The colour temperature for the white light that white light LEDs lighting means generate is not
Higher than 2800K.The blue light compensation LED chip peak wavelength of blue light sent out or the blue light sent out are through the filtered peak of optical filter
It is worth wavelength between 460nm~480nm (including 460nm and/or 480nm).Mixed light mechanism is for producing white light LEDs lighting means
Raw white light is with the blue light compensation LED chip blue light sent out or the white light for generating white light LEDs lighting means and through optical filter
Filtered blue light carries out mixed light processing.Preferably, the colour temperature for the white light that white light LEDs lighting means generate is in 2500~2800K
Between.Fluorescent powder is preferably yellowish green fluorescent powder and red fluorescence powder.
The LED of white light is produced for typical blue light excitation LED chip excitated fluorescent powder, and there is no completely without blue light
Possibility because for luminous mechanism, if blue light is without residue after laser fluorescence powder, then the light that independent fluorescent powder is sent out is
It can not mix and generate white light, it is therefore, high for the long blue ray radiation dosage of spectrum intermediate waves existing for traditional LED light source, especially
It is peak wavelength 435nm between 440nm to the maximum short wavelength's blue light of eye retina occurrence situation, and in order to
It reduces blue ray radiation and reduces the problem that colour rendering index is low caused by the correlated colour temperature of white light LEDs lighting means, above-mentioned low blue light
It endangers LED light source and preparation method thereof and compensates LED chip by the way that blue light is arranged with the lamps and lanterns containing the low blue light harm LED light source
Blue light compensation is carried out with the white light that the white light LEDs lighting means to low related color temperature are sent out, because the blue light of compensation (can be specific
The blue light blue light that directly sends out of compensation LED chip or the blue light that sends out of general blue light compensation LED chip filter through specific
Piece filter after blue light) peak wavelength between 460nm~480nm (including 460nm and/or 480nm), therefore, compensation
Blue light is smaller to the injury of eye retina, and the blue light compensated can make entire low blue light harm LED light source reach reading
Etc. correlated colour temperature, light efficiency and colour rendering index needed for occasions, be particularly advantageous to improve colour rendering index.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of low blue light harm LED light source, which is characterized in that compensate LED including blue light excitation LED chip, fluorescent powder, blue light
Chip and mixed light mechanism；The blue light excitation LED chip is matched with the fluorescent powder constitutes white light LEDs lighting means, described
The some blue light that blue light excitation LED chip generates is used to excite the light-emitting phosphor, and with remaining blue light at white light；Institute
The correlated colour temperature for stating the white light of white light LEDs lighting means generation is not higher than 2800K；The indigo plant that the blue light compensation LED chip is sent out
The peak wavelength of light or the blue light that sends out are through the filtered peak wavelength of optical filter between 460nm~480nm；The mixed light
Mechanism is used to the white light that the white light LEDs lighting means generate compensating the blue light or incite somebody to action that LED chip is sent out with the blue light
The white light that the white light LEDs lighting means generate carries out mixed light processing with through the filtered blue light of the optical filter.
2. low blue light harm LED light source as described in claim 1, which is characterized in that the fluorescent powder is yellowish green fluorescent powder
And red fluorescence powder.
3. low blue light harm LED light source as claimed in claim 2, which is characterized in that the white light LEDs lighting means generated
The correlated colour temperature of white light is between 2500~2800K.
4. low blue light harm LED light source as claimed in claim 3, which is characterized in that blue light harm efficiency is less than at 3000K
3W/Klm。
5. low blue light harm LED light source as described in any one of claims 1 to 4, which is characterized in that the LED light source
Colour rendering index is not less than 90.
6. a kind of lamps and lanterns, which is characterized in that including low blue light harm LED light source such as according to any one of claims 1 to 5.
7. lamps and lanterns as claimed in claim 6, which is characterized in that further include cooling mechanism, the low blue light harm LED light source peace
Loaded on the cooling mechanism.
8. a kind of production method of low blue light harm LED light source, which is characterized in that in blue light excitation LED chip and fluorescent powder structure
At white light LEDs lighting means on the basis of add blue light compensation LED chip and mixed light mechanism, or add blue light compensation LED core
Piece, optical filter and mixed light mechanism；The some blue light that the blue light excitation LED chip generates is used to excite the light-emitting phosphor,
And with remaining blue light at white light；The correlated colour temperature for the white light that the white light LEDs lighting means generate is not higher than 2800K；Institute
The blue light stated the peak wavelength for the blue light that blue light compensation LED chip is sent out or sent out exists through the filtered peak wavelength of optical filter
Between 460nm~480nm；The white light that the mixed light mechanism is used to generate the white light LEDs lighting means is mended with the blue light
Repay the blue light that LED chip is sent out or the white light that the white light LEDs lighting means are generated with it is filtered through the optical filter
Blue light carries out mixed light processing.
9. the production method of low blue light harm LED light source as claimed in claim 8, which is characterized in that the white light LEDs shine
The correlated colour temperature for the white light that mechanism generates is between 2500~2800K.
10. the production method of low blue light harm LED light source as claimed in claim 8, which is characterized in that the fluorescent powder is Huang
Green emitting phosphor and red fluorescence powder.
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| CN201611140829.7A CN108613022A (en) | 2016-12-12 | 2016-12-12 | Low blue light harm LED light source and preparation method thereof and lamps and lanterns |
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| CN201611140829.7A CN108613022A (en) | 2016-12-12 | 2016-12-12 | Low blue light harm LED light source and preparation method thereof and lamps and lanterns |
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| CN109578823A (en) * | 2018-12-17 | 2019-04-05 | 华中科技大学 | A kind of laser white light source of laser diode and fluorescent powder membrane cooling simultaneously |
| CN110970409A (en) * | 2019-12-19 | 2020-04-07 | 宁波升谱光电股份有限公司 | Reduce COB light source device of blue light harm |
| CN112050159A (en) * | 2020-09-02 | 2020-12-08 | 中国计量大学 | High-light-efficiency high-color-rendering quantum dot illumination light source capable of preventing blue light and lamp |
| WO2021135752A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Backlight module, electronic device, and light bar |
| CN113544432A (en) * | 2019-01-18 | 2021-10-22 | 研究发展中心“拜鲁门”有限责任公司 | LED white light source with biological radiation spectrum |
| CN116357904A (en) * | 2023-04-19 | 2023-06-30 | 广州乾昇光电科技股份有限公司 | Low blue light harm's high light efficiency LED light source |
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