CN103939805A - Low-color-temperature amber LED street lamp suitable for night driving of middle-aged and elderly people - Google Patents
Low-color-temperature amber LED street lamp suitable for night driving of middle-aged and elderly people Download PDFInfo
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Abstract
The invention discloses a low-color-temperature amber LED street lamp suitable for night driving of middle-aged and elderly people. The street lamp which is low in color temperature, still has the high lighting effect and the high color rendering performance of a light emitting diode, and has the high fog transmission characteristic of a high pressure sodium lamp is formed by combining a blue-light indium gallium nitrogen LED chip and amber fluorescent powder according to the appropriate proportion, and a traditional high-voltage sodium street lamp is replaced. Compared with the traditional high-voltage sodium lamp, the low-color-temperature amber LED street lamp has the high lighting effect and the high color rendering index; compared with a common white-light LED, the low-color-temperature amber LED street lamp has the low color temperature and the high fog transmission performance, internal clock disorders cannot be caused, caused light pollution is relatively low, and the low-color-temperature amber LED street lamp is suitable for night driving and night walking of the middle-aged and elderly people with the yellowed retina.
Description
Technical field
The present invention relates to high-power LED street lamp, particularly a kind of colour temperature is between the amber high-power low colour temperature LED street lamp between 1700K to 2700K.
Background technology
Along with the development of semiconductor lighting technology, LED has that light efficiency is high, color is many, orientable, energy-conserving and environment-protective, reliability is high, colour rendering good, the life-span is long, the easy advantage such as regulation and control, has occurred the trend of alternative various traditional lighting light source products.For traditional high-pressure mercury lamp street lamp, due to LED small volume, can meet the more uniform hot spot distribution in road surface by scioptics, the utilization that improves luminous energy, therefore can reach than the higher efficiency of light energy utilization of high-pressure mercury lamp and uniformity; Due to the high light efficiency of LED, make it than high-pressure mercury lamp, there is better energy-saving effect.
White light LEDs mainly adds that by blue-light LED chip yellow fluorescent powder forms at present, more at the blue light ingredient of low wavelength range, so colour temperature is higher.Night, street lighting belonged to mesopic vision, and due to Pu Jinye effect, human eye is comparatively responsive to the light of low wavelength range, and the mesopic vision light efficiency of white light LEDs is higher than photopic vision light efficiency.This feature of white light LEDs once illuminated boundary is thought an advantage.But, in the use of white light LEDs, more manifested the more existing problem of LED of this blue light part recently.The illumination meeting of this class high color temperature, rich blue-ray LED produces multiple side effect to human body and vision; It can suppress the generation of human body melatonin, people is had difficulty in going to sleep and produce fatigue, and permanent use can cause biological clock disorderly, and then produces spiritual problem; Rich blue-ray LED can cause comparatively strong aura at night to pollute, and the astronomical observation at the mankind's life, night, ecological environment and night sky overall aesthetic are all had to harmful effect; In addition, because the elderly is along with the age increases, there is crystalline lens aetiolation, the elderly's eyes cannot be accepted preferably at night the light sending from the rich blue-ray LED light source of this class, use common white light LEDs to be at present unfavorable for middle-aged and old driving and walkings at night, will reduce the safety coefficient of nighttime driving and walking.
Summary of the invention
The object of patent of the present invention is to solve in existing LED technology, and the blue light ingredient of LED is more, and colour temperature is higher, psychology and physiological side effects and light pollution effect are more serious, be not suitable for the elderly and drive night and walking, mist transmitting is not enough, is totally not suitable for the problem of night-road illumination.The invention provides a kind of amber LED street lamp of low colour temperature that is suitable for middle-aged and old nighttime driving illuminations, comprise amber great power LED, free-form surface lens, diffuser, wiring board, driving power, radiator structure and shell, the spectrum design of described amber great power LED adopts indium gallium nitrogen blue-light LED chip excitated fluorescent powder to send amber light formation, the blue light peak wavelength of sending is between 440nm to 460nm, fluorescent material used mixes and forms by a certain percentage for mixing the amber fluorescent material of europium or YAG yellow fluorescent powder and red fluorescence powder, its peak luminous wavelength is between 580nm to 600nm, in the light that described amber great power LED sends, the energy proportion of blue light is less than 10% of gross energy, amber luminous energy ratio is greater than gross energy 90%, its colour temperature is between 1700K to 2700K.
Further, described amber great power LED has than the raising of high-pressure mercury lamp road lamp efficiency more than 20%, and equivalent colour rendering improves more than 50%, and equivalent colour rendering index Rames calculates as follows:
γ refers to color shift normalizing parameter, by ambient brightness, is determined, Ra is the colour rendering index under photopic vision.
Further, described amber great power LED (1) meets biological clock requirement, the inhibitory action when night illumination, human body melatonin being produced is lower more than 80% than the LED street lamp of the above colour temperature of 3000K, can not cause that biological clock is disorderly, light source is the melatonin depression effect (MMSI to human body when night illumination
a) calculate as follows:
K
0and K
mes0spectral luminous efficacy while being respectively night illumination under photopic vision and mesopic vision condition; V (λ) and Vmes (λ) are respectively the spectral luminous efficiency under photopic vision and mesopic vision illumination; S (λ) is the spectral power distribution of the LED light source of design; S
a(λ) be the spectral power distribution of CIE standard A light source; C (λ) is the inhibition function of each wavelength light to human body melatonin.
Further, the more common white light LEDs of visible ray scattering aura light pollution that described amber great power LED causes is low more than 1 times, under misty rain, haze weather, has the strongest penetration capacity, resolution capability to object while improving nighttime driving, the aura index M GVI in visible-range
acalculate as follows:
V ' (λ) represents the spectral luminous efficiency of human eye under noctovision condition.
Further, the light that described amber great power LED sends meets the elderly due to the vision requirement after crystalline lens yellow, higher than the LED street lamp of the above colour temperature of 3000K to the lenticular transmitance of the elderly, be applicable to the elderly in nighttime driving and walking, the retina brightness decline effect index M LYIage causing because of crystalline lens yellow calculates as follows:
T
age(λ) and T
25(λ) be a certain age the elderly and 25 years old lenticular averaged spectrum transmitance of young people.
Further, described in, mix the amber fluorescent material of europium and comprise (Sr, Ba)
2siO
4: Eu; Described yellow fluorescent powder comprises Y
3(Al, Ga)
5o
12: Ce; Described red fluorescence powder comprises (Ca, Sr)
2si
5n
8: Eu, Ca
2si
5n
8: Eu or Sr
2si
5n
8: Eu.
Colour temperature of the present invention lower (between 1700K and 2700K), sending photochromic is amber high-power LED street lamp, aura pollutes and also along with the reduction of blue light ingredient, reduces; The light color that low colour temperature LED street lamp of the present invention sends is amber, can be received relatively easily by the elderly of crystalline lens yellow, thereby improve the resolution capability to object at night, and they can be gone on a journey safely at night.And because the composition of amber light is more, compare common white light LEDs and there is scattering aura still less and the mist transmitting of Geng Gao.Meanwhile, the technology of the present invention, with respect to traditional road lighting high-pressure mercury lamp of current use, still has the advantage that the design of LED light source hot spot is adjustable, light efficiency is high, colour rendering is good.
Amber high-power LED street lamp of the present invention is compared with the high-pressure mercury lamp of existing conventional night illumination, its light efficiency apparently higher than high-pressure mercury lamp, to the penetrability of mist be better than high-pressure mercury lamp, color developing is more outstanding than high-pressure mercury lamp.Meanwhile, the present invention compares with existing white light LEDs, and the blue light ingredient that sends spectrum is lower, and colour temperature is also lower.It is lower to the generation inhibition of human body melatonin, can not cause that fatigue, dyscoimesis and biological clock are disorderly; And the city existing white light LEDs of aura damage ratio that it causes is low.Meanwhile, since middle-aged and old crystalline lens yellow, the visual condition when LED street lamp of the present invention's design is more applicable to the elderly at nighttime driving and walks than common white light LED road lamp.
Accompanying drawing explanation
Fig. 1 is the structure of amber high-power low colour temperature LED street lamp of the present invention;
Fig. 2 is the curve of spectrum contrast that existing warm white, positive white LEDs, high-pressure mercury lamp and amber great power LED send;
Fig. 3 is the inhibition function C (λ) of each wavelength light to human body melatonin;
Fig. 4 is 25,50 and 75 years old people's crystalline lens mean transmissivity curve to each wavelength visible ray.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the present invention uses indium gallium nitrogen blue-light LED chip, be equipped with amber fluorescent material or the amber fluorescent material red and that YAG yellow fluorescent powder is mixed into by a certain percentage of proper ratio, be encapsulated into Novel LED light, colour temperature is controlled to 1700-2700K, then before LED, configure free-form surface lens 2, adopt aluminium base, ceramic substrate or metal circuit board, with heat pipe or radiating fin, Metal Substrate is heat sink 6 heat radiation, mix aluminium alloy or stainless steel casing 7 and controlled constant current power driving power supply 5.
In shell 7, have lamp driver plate 4, be welded with amber high-powered LED lamp 1 on lamp driver plate 4, the peak wavelength of blue-light LED chip is in 440nm left and right, and the peak wavelength that sends light after amber fluorescent material is excited is at 580-600nm.LED's is equipped with free-form surface lens 2 above, makes the light that LED sends become the batswing tab hot spot distribution of sprawling along road surface direction.The wiring board of LED lamp is aluminium base, ceramic substrate, silicon substrate or metal circuit board, plate below Metal Substrate to be housed heat sink, heat sink radiating fin or the heat-pipe apparatus of being equipped with below.
Fig. 2 is the spatial distribution that amber LED, warm white LED, positive white LEDs and high-pressure mercury lamp HPS send.As seen from Figure 2, the curve of spectrum that amber great power LED sends light is comparatively level and smooth, and the shared composition of blue light is lower.By the curve of spectrum, can be designed the parameter such as colour temperature, colour rendering index, radiation light efficiency of amber great power LED.Table 1 be to the amber great power LED, high-pressure mercury lamp of design, existing warm in vain, the comparison of the relevant parameter of the white light LEDs such as just white.In table, 0.1cd/m
2, 2cd/m
2and >5cd/m
2correspond respectively to the ambient brightness that pedestrian walks under mesopic vision, through street driving mesopic vision and photopic vision condition, the relevant parameter drawing under each ambient brightness is different.
In these parameters, equivalent colour rendering index R
amesrefer to is when considering that ambient brightness reduces, and normalized light source equivalence colour rendering index in the chromatic resolving power decline situation of human eye, at >5cd/m
2photopic vision condition under be R
a.Equivalence colour rendering index its computational methods are as shown in Equation (1):
（1）
In formula (1), γ refers to color shift normalized parameter, is a parameter being determined by ambient brightness.For 0.1cd/m
2and 2cd/m
2environment, γ is respectively 0.16 and 0.51.
The spectrophotometric data contrast of table 1 various types of light sources
From table 1, the colour temperature of the amber great power LED of design is lower, and chromaticity coordinate and high-pressure mercury lamp approach, and equivalent colour rendering index is better than high-pressure mercury lamp.Though equivalence colour rendering index is not as good as white light LEDs, is 0.1cd/m in brightness
2and 2cd/m
2night under condition, equivalent colour rendering index has reached respectively 90 and 70, can meet the needs that look is distinguished in night illumination completely.
The amber high-power low colour temperature LED street lamp of the present invention, the inhibitory action that it produces melatonin to human body is lower, correspondingly also has lower biological clock and upsets effect.The light of each wavelength can use inhibition function C (λ) to represent to the melatonin depression effect of human body, as shown in Figure 3.Therefore,, under unit light intensity, the light source of unit brightness is the melatonin depression effect MMSI to human body when night illumination
acan represent with formula (2):
（2）
Wherein, K
0and K
mes0spectral luminous efficacy while being respectively night illumination under photopic vision and mesopic vision illumination; V (λ) and V
mes(λ) be respectively the spectral luminous efficiency under photopic vision and mesopic vision illumination; S (λ) is the spectral power distribution of the LED light source of design; S
a(λ) be the spectral power distribution of CIE standard A light source, it produces biological clock upset effect to human body and is defined as 1 under bright conditions.
By amber great power LED of the present invention respectively with common white light LEDs and high-pressure mercury lamp at bright conditions (>5cd/m
2), mesopic vision lighting condition (0.1cd/m
2, 2cd/m
2under) MMSI
acontrast, result is as shown in table 2.
The melatonin depression effect contrast of each light source of table 2
From table 2, the index that amber great power LED of the present invention suppresses melatonin is all minimum under each brightness conditions, and can not produce melatonin to human body has obvious inhibitory action, can not cause that biological clock is disorderly.
Amber high-power low colour temperature LED street lamp of the present invention, the aura that it causes pollutes low.Because of Rayleigh scattering and Mie scattering, the light of rich blue-ray LED light source can be scattered to top, city sky by airborne particle, causes celestial body relative brightness in night sky light pollution and the night sky to decline, and affects the overall aesthetic of astronomical observation and the night sky.Meanwhile, this aura also has a negative impact to the ecological environment at night, affects physiological reaction and the structure of animals and plants, human body.
Judging quota MGVI to aura at night
arefer to the aura index that can observe in whole visible-range; MGVI
acalculating as shown in Equation 3.
（3）
V ' (λ) represents the spectral response intensity of human eye under noctovision condition.By the MGVI of amber great power LED, white light LEDs and high-pressure mercury lamp
adone contrast, result is as shown in table 3.
The aura polluting effect contrast that the various light sources of table 3 cause
From table 3, it is minimum that the aura that amber high-power low colour temperature LED of the present invention causes pollutes.Meanwhile, this also means that it,, in misty rain, haze weather environment, has the strongest penetration capacity in described several light sources, the resolution capability to object while improving nighttime driving.
The aura that common white light LEDs causes pollutes higher, and under the more environment of particle, penetration capacity is poor, not strong to weather adaptive capacity, and is not suitable for road lighting at night.
The crystalline lens of human body, along with the increase at age, is understood progressively yellow, and result is that crystalline lens declines to the transmitance of low wavelength (blue light), and blue light cannot be presented on retina well.For the elderly, the brightness of rich blue light source is in fact much lower.The amber high-power low colour temperature LED street lamp of the present invention's design is compared current white LED light source, is more applicable to the elderly in nighttime driving and walking.Crystalline lens spectral transmittance T
age(λ) relevant with the age, as shown in Figure 4.The effect that this retina brightness causing because of crystalline lens yellow declines can be used the retina brightness index MLYI relevant with the age
agerepresent, by formula (4), calculate and obtain.
（4）
Table 4 has been listed various light source MLYI
agecontrast.
The various light sources of table 4 are to middle-aged and old retina brightness index contrasts
From table 4, to compare with high-pressure mercury lamp, amber great power LED is similar to middle-aged and old retina brightness, does not both have obvious brightness to decline.And common white light LEDs is to the elderly, the elderly of one's mid-70s especially, retina brightness has comparatively significantly and declines.
Amber high-power low colour temperature LED street lamp one embodiment of the present invention, by the excitated red Sr of blue light indium gallium nitrogen LED chip
2si
5n
8: Eu and amber (Sr, Ba)
2siO
4: Eu mixed fluorescent powder forms; The colour temperature that the amber high-power low colour temperature LED street lamp of the present embodiment records is 1851K, and colour rendering index (photopic vision) is 40.1.
Amber high-power low another embodiment of colour temperature LED street lamp of the present invention, by blue light indium gallium nitrogen LED chip excitated red (Ca, Sr)
2si
5n
8with yellow Y
3(Al, Ga)
5o
12: Ce mixed fluorescent powder forms.Wherein, the mixed proportion of red fluorescence powder and yellow fluorescent powder is 1:1.This amber high-power low colour temperature LED street lamp colour temperature is 1842K, and colour rendering index is 38.9.
Each index of two kinds of embodiment of amber high-power low colour temperature LED of the present invention is as shown in table 5.
Each index of two kinds of embodiment of the amber high-power low colour temperature LED of table 5
Indices by the amber high-power low colour temperature LED of two kinds of embodiment is all similar.By 108, adopt the high-power amber LED of 1W of embodiment 1 and embodiment 2 design encapsulation to install in the circuit board respectively, be equipped with free-form surface lens, diffuser, driving power, radiator and shell, be packaged into the amber street lamp of 2 120W, there is the advantage that low, the equivalent colour rendering of colour temperature is good, melatonin inhibition level is low, haze-penetrating capability strong, cause light pollution the elderly little, that be applicable to crystalline lens yellow to walk and drive.
Shown in the above and figure is only the preferred embodiment of the present invention.It should be pointed out that for the person of ordinary skill of the art, not departing under the prerequisite of principle of the present invention, can also make some modification and improvement, these also should be considered as belonging to protection scope of the present invention.
Claims (6)
1. one kind is suitable for the amber LED street lamp of low colour temperature that middle-aged and old nighttime drivings throw light on, comprise amber great power LED (1), free-form surface lens (2), diffuser (3), wiring board (4), driving power (5), radiator structure (6) and shell (7), it is characterized in that: the spectrum design of described amber great power LED (1) adopts indium gallium nitrogen blue-light LED chip excitated fluorescent powder to send amber light formation, the blue light peak wavelength of sending is between 440nm to 460nm, fluorescent material used mixes and forms by a certain percentage for mixing the amber fluorescent material of europium or YAG yellow fluorescent powder and red fluorescence powder, its peak luminous wavelength is between 580nm to 600nm, in the light that described amber great power LED (1) sends, the energy proportion of blue light is less than 10% of gross energy, amber luminous energy ratio is greater than gross energy 90%, its colour temperature is between 1700K to 2700K.
2. the amber LED street lamp of low colour temperature that is suitable for the illumination of middle-aged and old nighttime drivings according to claim 1, it is characterized in that: described amber great power LED has than the raising of high-pressure mercury lamp road lamp efficiency more than 20%, equivalence colour rendering improves more than 50%, and equivalent colour rendering index Rames calculates as follows:
γ refers to color shift normalizing parameter, by ambient brightness, is determined, Ra is the colour rendering index under photopic vision.
3. the amber LED street lamp of low colour temperature that is suitable for the illumination of middle-aged and old nighttime drivings according to claim 1, it is characterized in that: described amber great power LED (1) meets biological clock requirement, the inhibitory action when night illumination, human body melatonin being produced is lower more than 80% than the LED street lamp of the above colour temperature of 3000K, can not cause that biological clock is disorderly, light source is the melatonin depression effect (MMSI to human body when night illumination
a) calculate as follows:
K
0and K
mes0spectral luminous efficacy while being respectively night illumination under photopic vision and mesopic vision condition; V (λ) and Vmes (λ) are respectively the spectral luminous efficiency under photopic vision and mesopic vision illumination; S (λ) is the spectral power distribution of the LED light source of design; S
a(λ) be the spectral power distribution of CIE standard A light source; C (λ) is the inhibition function of each wavelength light to human body melatonin.
4. the amber LED street lamp of the low colour temperature method that is suitable for the illumination of middle-aged and old nighttime drivings according to claim 3, it is characterized in that: the more common white light LEDs of visible ray scattering aura light pollution that described amber great power LED causes is low more than 1 times, under misty rain, haze weather, there is the strongest penetration capacity, resolution capability to object while improving nighttime driving, the aura index M GVIA in visible-range calculates as follows:
V ' (λ) represents the spectral luminous efficiency of human eye under noctovision condition.
5. the amber LED street lamp of low colour temperature that is suitable for the illumination of middle-aged and old nighttime drivings according to claim 1, it is characterized in that: the light that described amber great power LED sends meets the elderly due to the vision requirement after crystalline lens yellow, higher than the LED street lamp of the above colour temperature of 3000K to the lenticular transmitance of the elderly, be applicable to the elderly in nighttime driving and walking, the retina brightness decline effect index M LYI causing because of crystalline lens yellow
agecalculate as follows:
T
age(λ) and T
25(λ) be a certain age the elderly and 25 years old lenticular averaged spectrum transmitance of young people.
6. the amber LED street lamp of low colour temperature that is suitable for the illumination of middle-aged and old nighttime drivings according to claim 1, is characterized in that: described in mix the amber fluorescent material of europium and comprise (Sr, Ba)
2siO
4: Eu; Described yellow fluorescent powder comprises Y
3(Al, Ga)
5o
12: Ce; Described red fluorescence powder comprises (Ca, Sr)
2si
5n
8: Eu, Ca
2si
5n
8: Eu or Sr
2si
5n
8: Eu.
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|---|---|---|---|
| CN201410156678.9A CN103939805B (en) | 2014-04-18 | 2014-04-18 | Be suitable for the amber LED street lamp of low colour temperature of middle-aged and old nighttime driving illumination |
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|---|---|---|---|
| CN201410156678.9A CN103939805B (en) | 2014-04-18 | 2014-04-18 | Be suitable for the amber LED street lamp of low colour temperature of middle-aged and old nighttime driving illumination |
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| CN103939805B CN103939805B (en) | 2016-01-13 |
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ID=51187591
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| CN107990163A (en) * | 2017-12-28 | 2018-05-04 | 欧普照明股份有限公司 | Light source module group and lighting device |
| CN108695354A (en) * | 2017-03-31 | 2018-10-23 | 群创光电股份有限公司 | Display |
| CN115712363A (en) * | 2022-11-21 | 2023-02-24 | 北京中科睿医信息科技有限公司 | Interface color display method, device, equipment and medium |
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|---|---|
| CN103939805B (en) | 2016-01-13 |
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Effective date of registration: 20141023 Address after: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park source Street No. 258 Applicant after: China Jiliang University Applicant after: Ningbo Liaoyuan Lighting Co., Ltd. Address before: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park source Street No. 258 Applicant before: China Jiliang University Applicant before: NINGBO LIAOYUAN LIGHTING CO., LTD. |
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Effective date of registration: 20190520 Address after: 310018 Xue Yuan Street, Jianggan District, Hangzhou, Zhejiang Province, No. 258 Co-patentee after: Ningbo Liaoyuan Lighting Group Co., Ltd. Patentee after: China Jiliang University Address before: 310018 No. 258, Xue Yuan Street, Xiasha Higher Education Park, Hangzhou, Zhejiang Co-patentee before: Ningbo Liaoyuan Lighting Co., Ltd. Patentee before: China Jiliang University |
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Address after: 310018 No. 258, Xue Yuan Street, Xiasha Higher Education Park, Hangzhou, Zhejiang Co-patentee after: Ningbo Liaoyuan Lighting Group Co., Ltd. Patentee after: CHINA JILIANG UNIVERSITY Address before: 310018 Xue Yuan Street, Jianggan District, Hangzhou, Zhejiang Province, No. 258 Co-patentee before: Ningbo Liaoyuan Lighting Group Co., Ltd. Patentee before: China Jiliang University |
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