CN104540269A - Hybrid white light LED illuminating system and illuminance and color temperature control method thereof - Google Patents

Hybrid white light LED illuminating system and illuminance and color temperature control method thereof Download PDF

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Publication number
CN104540269A
CN104540269A CN201410758504.XA CN201410758504A CN104540269A CN 104540269 A CN104540269 A CN 104540269A CN 201410758504 A CN201410758504 A CN 201410758504A CN 104540269 A CN104540269 A CN 104540269A
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illumination
light led
light source
temperature
light
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CN201410758504.XA
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Chinese (zh)
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CN104540269B (en
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陈焕庭
周小方
陈耀庭
蔡嘉毅
林硕
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闽南师范大学
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Abstract

The invention provides a hybrid white light LED illuminating system and an illuminance and color temperature control method thereof. The system comprises a cold light LED light source, a warm light LED light source, a double-circuit dimmable AC/DC constant current driving source, a color sensor, a temperature sensor and a control device, wherein the cold light LED light source and the warm light LED light source are used for conducting color temperature mixing to give out white light, the double-circuit dimmable AC/DC constant current driving source is connected with the cold light LED light source and the warm light LED light source, the color sensor and the temperature sensor are used for detecting mixed light, and when any one of the illuminance of the detected mixed light, the color temperature of the detected mixed light and the temperature of the illuminating system exceeds a set threshold value, the drive current or the duty ratio which is input to the double-circuit dimmable AC/DC constant current driving source and applied to the cold light LED light source and the warm light LED light source can be adjusted through a set algorithm until the drive current or the duty ratio is within the set threshold value of a target value. The hybrid white light LED illuminating system and the illuminance and color temperature control method thereof have the advantages that the warm light LED device light source and the cold light LED device light source are integrated on a designed printed circuit board, a high integration packaging structure can be formed, and therefore the even mixed light and the high luminous efficiency can be provided.

Description

The control method of a kind of mixed white light LED illumination System and illumination and colour temperature
Technical field
The present invention relates to mixed white light LED illumination System control technology, refer more particularly to the control method of a kind of mixed white light LED illumination System and illumination and colour temperature.
Background technology
Compared with ordinary light source, the features such as light-emitting diode (Light Emitting Diode is called for short LED) has power saving, the life-span is long, light efficiency is high, radiationless, pollution-free, have been widely used in lighting field and other field.White light LED part is under different radiating condition, and LED chip peak wavelength shift will cause colour temperature significant change.According to the chromaticity index of ANSI C78.377 American National Standard-solid-state illumination product, cold white light source (nominal colour temperature 5000K) color tolerance is 283K, and ANSIC78.377 standard adopts 4 footwork MacAdam oval as delimiting color tolerance foundation, along with the development of solid state illumination technology, the oval color tolerance of 3 footwork MacAdam may be used, and color tolerance scope like this will reduce further.
The adjustment of white light LED color temperature is by changing phosphor material powder (LED chip is smeared fluorescent material and realized white light) and drived control LED integrated lighting system (integrated warm white and cold white light two kinds of LED light sources) realization.The former realizes LED component colour temperature by encapsulation technology and regulates; The latter is by Driving technique, control current amplitude, the duty ratio of warm white and cold white light LEDs respectively, and then realize the continuous regulatory function of system colour temperature, but the current duty ratio for mixed white light LED integrated lighting system and colour temperature are supposed to be linear relationship, there is certain deviation with actual conditions, there is certain limitation.
There is close relation in phosphor emission spectral characteristic and LED chip excitation spectrum, therefore LED chip peak wavelength shift will cause the marked change of fluorescent material spectral characteristic, and the spectral component ratio of each color also changes, and then causes white light color offset problem.Under direct current and PWM drive pattern, LED chip peak wavelength shift all will cause the colour fluctuation problem of illuminator, correlative study shows in RGB White-light LED illumination system, the change of spectrum amplitude 1%, and the skew of peak wavelength 1nm all will cause significant color to change.Therefore in White-light LED illumination system, because system exists drive current and junction temperature dynamic change, how accurately to control White-light LED illumination system colors stability is a hot issue attracted people's attention.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, providing the control method of a kind of mixed white light LED illumination System and illumination and colour temperature.
The present invention is realized by above technical scheme:
The invention provides a kind of mixed white light LED illumination System, this kind of mixed white light LED illumination System comprises and sends multiple cold light LED light source of white light and multiple warm light LED light source for colour temperature mixing;
Two-way tunable optical AC/DC constant-current driving power supply; A road is wherein connected with multiple cold light LED light source; Another road is connected with described multiple warm light LED light source;
Detect the color sensor of the illumination of the mixed light of described multiple cold light LED light source and multiple warm light LED light source formation;
Detect the color sensor of the colour temperature of the mixed light of described multiple cold light LED light source and multiple warm light LED light source formation;
Detect the temperature sensor of the temperature of the mixed light of described multiple cold light LED light source and multiple warm light LED light source formation,
Control device, respectively with described two-way tunable optical AC/DC constant-current driving power supply, described color sensor and temperature sensor signal connect, and any one in the illumination & colour temperature and temperature of the mixed light that described color sensor and temperature sensor detect is when exceeding the threshold value of the illumination & colour temperature threshold value needed for mixed light of setting and temperature, the drive current applied to described cold light LED light source and warm light LED light source by the algorithm adjustment input two-way tunable optical AC/DC constant-current driving power supply of setting or duty ratio, until the illumination & colour temperature of the mixed light of described color sensor and temperature sensor detection and illuminator temperature are all positioned at the threshold value of the desired value of setting.
Preferably, also comprise AC/DC constant voltage Switching Power Supply, described AC/DC constant voltage Switching Power Supply is electrically connected with described control device.
Preferably, the colour temperature of described cold light LED light source is 7000K; The colour temperature of described warm light LED light source is 3000K.
Preferably, described control device is single-chip microcomputer.
Present invention also offers a kind of illumination of mixed white light LED illumination System and the control method of colour temperature, the method comprises the following steps:
Obtain the illumination & colour temperature threshold value needed for mixed light and the illuminator temperature threshold of setting;
Detect illumination & colour temperature and the illuminator temperature of the mixed light of multiple cold light LED light source and the formation of warm light LED light source;
When in described detection illumination & colour temperature and temperature, any one exceeds illumination & colour temperature threshold value and the temperature threshold of described setting, control device according to setting the illumination & colour temperature needed for mixed light with it and temperature threshold control described two-way tunable optical AC/DC constant-current driving power supply by the algorithm of setting and apply different driving electric current or duty ratio to described multiple cold light LED light source and warm light LED light source, until the illumination & colour temperature of the mixed light of described color sensor and temperature sensor detection and illuminator temperature are all positioned at the threshold value of the desired value of setting.
Preferred described set algorithm is non-linear dimming & color feedback control algolithm.
The invention has the beneficial effects as follows: mixed white light illuminator of the present invention, by warming up light and cold light LED device light source is integrated in designed printed circuit board (PCB), forms high integrated encapsulation structure, thus uniform mixing light and higher light extraction efficiency can be provided.
Accompanying drawing explanation
Fig. 1 is that the kind mixed white light LED illumination System FEEDBACK CONTROL flow process that provides of the embodiment of the present invention is as figure;
Multiple cold light LED light source that Fig. 2 provides for the embodiment of the present invention and multiple warm light LED light source schematic diagram is set.
Fig. 3 is mixed white light LED information display system cold light LED light source load power 0.5W, is highly in 1 meter of situation, Illumination Distribution picture on X-Y axle on target illumination field;
Fig. 4 is mixed white light LED information display system cold light LED light source load power 0.75W, is highly in 1 meter of situation, Illumination Distribution picture on X-Y axle on target illumination field;
Fig. 5 is mixed white light LED information display system cold light LED light source load power 1W, is highly in 1 meter of situation, Illumination Distribution picture on X-Y axle on target illumination field;
Fig. 6 is mixed white light LED information display system cold light LED light source load power 0.5-1W, is highly in 1.5 meters of situations, Illumination Distribution picture on X-Y axle on target illumination field;
Fig. 7 is mixed white light LED information display system cold light LED light source load power 0.5-1W, is highly in 2 meters of situations, Illumination Distribution picture on X-Y axle on target illumination field;
Fig. 8 be mixed white light LED information display system warm up light LED light source bearing power 0.5-1W, highly in 1-2 rice situation, Illumination Distribution picture in X-direction on target illumination field;
Fig. 9 be mixed white light LED information display system warm up light LED light source bearing power 0.5-1W, highly in 1-2 rice situation, Illumination Distribution picture in Y direction on target illumination field.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiments provide a kind of mixed white light LED illumination System, this kind of mixed white light LED illumination System comprises and sends multiple cold light LED light source of white light and multiple warm light LED light source for colour temperature mixing;
Two-way tunable optical AC/DC constant-current driving power supply; A road is wherein connected with multiple cold light LED light source; Another road is connected with multiple warm light LED light source;
Detect the color sensor of the illumination of the mixed light of multiple cold light LED light source and multiple warm light LED light source formation;
Detect the color sensor of the colour temperature of the mixed light of multiple cold light LED light source and multiple warm light LED light source formation;
Detect the temperature sensor of the temperature of multiple cold light LED light source and multiple warm light LED light source formation illuminator,
Control device, respectively with two-way tunable optical AC/DC constant-current driving power supply, color sensor and temperature sensor signal connect, and any one in the illumination & colour temperature and temperature of the mixed light that color sensor and temperature sensor detect is when exceeding the threshold value of the illumination & colour temperature threshold value needed for mixed light of setting and temperature, the drive current applied to cold light LED light source and warm light LED light source by the algorithm adjustment input two-way tunable optical AC/DC constant-current driving power supply of setting or duty ratio, until the illumination & colour temperature of the mixed light of color sensor and temperature sensor detection and illuminator temperature are all positioned at the threshold value of the desired value of setting.
In above-mentioned specific embodiment, by illumination & colour temperature and the illuminator temperature of the mixed light of the formation of detection, and detected value and setting threshold are contrasted, and the illumination of multiple cold light LED light source and warm light LED light source is controlled according to the result of contrast, thus achieve and form mixed light by monochromatic LED light source, and control drive current or the duty ratio of cold light LED light source and warm light LED light source by the algorithm of setting.The algorithm of setting is wherein non-linear dimming & color feedback control algolithm, thus can control two kinds of LED light sources accurately.
In addition, this system also comprises AC/DC constant voltage Switching Power Supply, and AC/DC constant voltage Switching Power Supply is electrically connected with control device.
The colour temperature of cold light LED light source is wherein 7000K; The colour temperature of warm light LED light source is 3000K.
Preferred control device is single-chip microcomputer.There is good control and computing function.
In addition, the embodiment of the present invention additionally provides a kind of illumination of mixed white light LED illumination System and the control method of colour temperature, and the method comprises the following steps:
Obtain the illumination & colour temperature threshold value needed for mixed light and the illuminator temperature threshold of setting;
Detect illumination & colour temperature and the illuminator temperature of the mixed light of multiple cold light LED light source and the formation of warm light LED light source;
When in described detection illumination & colour temperature and illuminator temperature, any one exceeds illumination & colour temperature threshold value and the temperature threshold of described setting, control device according to setting the illumination & colour temperature needed for mixed light with it and temperature threshold control described two-way tunable optical AC/DC constant-current driving power supply by the algorithm of setting and apply different driving electric current or duty ratio to described multiple cold light LED light source and warm light LED light source, until the illumination & colour temperature of the mixed light of described color sensor and temperature sensor detection and illuminator temperature are all positioned at the threshold value of the desired value of setting.
Preferred described set algorithm is non-linear dimming & color feedback control algolithm.
Can be found out by said method, mixed white light illuminator of the present invention, by warming up light and cold light LED device light source is integrated in designed printed circuit board (PCB), forms high integrated encapsulation structure, thus can provide uniform mixing light and higher light extraction efficiency.
Substantive features of the present invention and significant advantage is illustrated further below by embodiment.Consult the structural representation that Fig. 1 and Fig. 2 is mixed white light LED illumination System in the present invention.System is connected by 6 cold light LED light sources (colour temperature 7000K), and 3 groups in parallel.6 warm light LED light source (colour temperature 3000K) series connection, 3 groups in parallel.
When it controls, first fixing is H position with target illumination field distance, and warm light LED light source does not work, and drives cold light LED light source separately, test different driving power P d, Cand target illumination field X, Y direction illumination and colour temperature under different distance H situation, by analyzing the E building illumination and colour temperature c(P d, C, X, Y, H), CCT c(P d, C, X, Y, H) and threedimensional model.
Afterwards, fixing is H position with target illumination field distance, and cold light LED light source does not work, and drives separately warm light LED light source, test different driving power P d, Wand target illumination field X, Y direction illumination and colour temperature under different distance H situation, by analyzing the E building illumination and colour temperature w(P d, W, X, Y, H), CCT w(P d, W, X, Y, H) and threedimensional model.
According to cold light and warm light E c(P d, C, X, Y, H), CCT c(P d, C, X, Y, H), E w(P d, W, X, Y, H), CCT w(P d, W, X, Y, H) and threedimensional model, adopt institute to propose mixed white light nonlinear model, structure mixed white light illumination E t(P d, T, X, Y, H), mixed white light colour temperature CCT t(P d, T, X, Y, H) and threedimensional model, and the high accuracy that (do not need feedback control system) in an open loop mode controls illumination and the colour temperature of mixed white light LED illumination System.
Internal system is by temperature sensor and color sensor, in conjunction with LED calorifics and optical model, dynamic monitoring illuminator junction temperature, mixing colour temperature, mixing illumination, based target variable, regulates current amplitude or the duty ratio of illuminator automatically by feedback control system, thus reaches the high accuracy control illumination & colour temperature of mixed light and the temperature of illuminator at different ambient temperatures.
Concrete, the implementing procedure of mixed white light LED illumination System illumination and color temperature control method in invention, fixing with target illumination field distance by mixed white light LED information display system is 1 meter, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 0.5W, illumination and colour temperature 200lux & 6700K (position coordinates 0 on target illumination field, 0), 192lux & 6750K (position coordinates 0, 100mm), 183lux & 6800K (position coordinates 0, 200mm), 160lux & 6855K (position coordinates 0, 300mm), 129lux & 6920K (position coordinates 0, 400mm), 194lux & 6760K (position coordinates 100mm, 0), 183lux & 6810K (position coordinates 200mm, 0), 160lux & 6870K (position coordinates 300mm, 0), 129lux & 6930K (position coordinates 400mm, 0), as shown in Figure 3.
By X different from target illumination field, Y direction test illumination and colour temperature, under under 0.5W driving power, LED light source is positioned at 1 meter of distance situation, the illumination E of target illumination field c-colour temperature CCT cas follows with the relation between target illumination plane coordinates (X, Y)
E C ( X , Y ) = ( - 0.00043 X 2 - 0.0026 X + 200 ) ( - 0.00041 Y 2 - 0.0026 Y + 200 ) 200 - - - ( 1 )
CCT C ( X , T ) = ( 0.51 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 2 )
Fixing with target illumination field distance by mixed white light LED information display system is 1 meter, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 0.75W, illumination and colour temperature 300lux & 6700K (position coordinates 0 on target illumination field, 0), 293lux & 6750K (position coordinates 0, 100mm), 275lux & 6800K (position coordinates 0, 200mm), 239lux & 6855K (position coordinates 0, 300mm), 195lux & 6920K (position coordinates 0, 400mm), 291lux & 6760K (position coordinates 100mm, 0), 283lux & 6810K (position coordinates 200mm, 0), 235lux & 6870K (position coordinates 300mm, 0), 193lux & 6930K (position coordinates 400mm, 0), as shown in Figure 4.
By X different from target illumination field, Y direction test illumination and colour temperature, under under 1W driving power, LED light source is positioned at 1 meter of distance situation, the illumination E of target illumination field c-colour temperature CCT cas follows with the relation between target illumination plane coordinates (X, Y)
E C ( X , Y ) = ( - 0.00066 X 2 - 0.0011 X + 300 ) ( - 0.00064 Y 2 - 0.0010 Y + 300 ) 300 - - - ( 3 )
CCT C ( X , Y ) = ( 0.51 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 4 )
Fixing with target illumination field distance by mixed white light LED information display system is 1 meter, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 1W, illumination and colour temperature 400lux & 7000K (position coordinates 0 on target illumination field, 0), 391lux & 7000K (position coordinates 0, 100mm), 366lux & 7000K (position coordinates 0, 200mm), 320lux & 7000K (position coordinates 0, 300mm), 260lux & 7000K (position coordinates 0, 400mm), 388lux & 7000K (position coordinates 100mm, 0), 259lux & 7000K (position coordinates 200mm, 0), 317lux & 7000K (position coordinates 300mm, 0), 257lux & 7000K (position coordinates 400mm, 0), as shown in Figure 5.
By X different from target illumination field, Y direction test illumination and colour temperature, under 1W driving power, LED light source is positioned at 1 meter of illumination E apart from target illumination field in situation c-colour temperature CCT cas follows with the relation between target illumination plane coordinates (X, Y)
E C ( X , Y ) = ( - 0.00088 X 2 - 0.0005 X + 400 ) ( - 0.00088 Y 2 - 0.0005 Y + 400 ) 400 - - - ( 5 )
CCT C ( X , Y ) = ( 051 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 6 )
By the above-mentioned illumination and colour temperature expression formula (1)-(6) that drive different loads power under height 1 meter, the illumination E of target illumination field c-colour temperature CCT cwith bearing power P d, crelation between-target illumination plane coordinates (X, Y), can be obtained by following formula
E C ( P d , c , X , Y ) = ( - 0.0009 P d , c X 2 - 0.0042 P d , c X + 400 P d , c ) ( - 0.00089 P d , c Y 2 - 0.00044 P d , c Y + 400 P d , c ) 400 P d , c - - - ( 7 )
CCT C ( P d , c , X , Y ) = ( 0.51 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 8 )
Just can by controlling cold light LED light source load power in mixed white light illuminator by (7) and (8), just can regulate is highly illumination and the colour temperature of optional position, target illumination field in 1 meter of situation.
Fixing with target illumination field distance by mixed white light LED information display system is 1.5 meters, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 0.5W, illumination and colour temperature 90lux & 6700K (position coordinates 0 on target illumination field, 0), 86lux & 6750K (position coordinates 0, 100mm), 84lux & 6800K (position coordinates 0, 200mm), 76lux & 6855K (position coordinates 0, 300mm), 59lux & 6920K (position coordinates 0, 400mm), 87lux & 6760K (position coordinates 100mm, 0), 85lux & 6810K (position coordinates 200mm, 0), 77lux & 6870K (position coordinates 300mm, 0), 58lux & 6930K (position coordinates 400mm, 0).
Fixing with target illumination field distance by mixed white light LED information display system is 1.5 meters, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 0.75W, illumination and colour temperature 140lux & 6700K (position coordinates 0 on target illumination field, 0), 130lux & 6750K (position coordinates 0, 100mm), 126lux & 6800K (position coordinates 0, 200mm), 114lux & 6855K (position coordinates 0, 300mm), 89lux & 6920K (position coordinates 0, 400mm), 128lux & 6760K (position coordinates 100mm, 0), 125lux & 6810K (position coordinates 200mm, 0), 112lux & 6870K (position coordinates 300mm, 0), 85lux & 6930K (position coordinates 400mm, 0).
Fixing with target illumination field distance by mixed white light LED information display system is 1.5 meters, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 1W, illumination and colour temperature 180lux & 6700K (position coordinates 0 on target illumination field, 0), 174lux & 6750K (position coordinates 0, 100mm), 168lux & 6800K (position coordinates 0, 200mm), 153lux & 6855K (position coordinates 0, 300mm), 124lux & 6920K (position coordinates 0, 400mm), 177lux & 6760K (position coordinates 100mm, 0), 167lux & 6810K (position coordinates 200mm, 0), 152lux & 6870K (position coordinates 300mm, 0), 123l ux & 6930K (position coordinates 400mm, 0).
By the above-mentioned illumination and the colour temperature result of calculation (as shown in Figure 6) that drive different loads power under height 1.5 meters, the illumination E of target illumination field c-colour temperature CCT cwith bearing power P d, crelation between-target illumination plane coordinates (X, Y), can be obtained by following formula
E C ( P d , c , X , Y ) = ( - 0.00049 P d , c X 2 - 0.0032 P d , c X + 180 P d , c ) ( - 0.00047 P d , c Y 2 - 0.0033 P d , c Y + 180 P d , c ) 180 P d , c - - - ( 9 )
CCT C ( P d , c , X , Y ) = ( 0.51 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 10 )
Fixing with target illumination field distance by mixed white light LED information display system is 2 meters, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 0.5W, illumination and colour temperature 50lux & 6700K (position coordinates 0 on target illumination field, 0), 46lux & 6750K (position coordinates 0, 100mm), 41lux & 6800K (position coordinates 0, 200mm), 37lux & 6855K (position coordinates 0, 300mm), 34lux & 6920K (position coordinates 0, 400mm), 46lux & 6760K (position coordinates 100mm, 0), 42lux & 6810K (position coordinates 200mm, 0), 38lux & 6870K (position coordinates 300mm, 0), 33lux & 6930K (position coordinates 400mm, 0).
Fixing with target illumination field distance by mixed white light LED information display system is 2 meters, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 0.75W, illumination and colour temperature 75lux & 6700K (position coordinates 0 on target illumination field, 0), 71lux & 6750K (position coordinates 0, 100mm), 66lux & 6800K (position coordinates 0, 200mm), 62lux & 6855K (position coordinates 0, 300mm), 53lux & 6920K (position coordinates 0, 400mm), 72lux & 6760K (position coordinates 100mm, 0), 67lux & 6810K (position coordinates 200mm, 0), 60lux & 6870K (position coordinates 300mm, 0), 52lux & 6930K (position coordinates 400mm, 0).
Fixing with target illumination field distance by mixed white light LED information display system is 2 meters, warm light LED light source does not work, independent driving cold light LED light source, test different driving power 1W, illumination and colour temperature 100lux & 6700K (position coordinates 0 on target illumination field, 0), 96lux & 6750K (position coordinates 0, 100mm), 94lux & 6800K (position coordinates 0, 200mm), 85lux & 6855K (position coordinates 0, 300mm), 76lux & 6920K (position coordinates 0, 400mm), 95lux & 6760K (position coordinates 100mm, 0), 91lux & 6810K (position coordinates 200mm, 0), 85lux & 6870K (position coordinates 300mm, 0), 77lux & 6930K (position coordinates 400mm, 0).
By the above-mentioned illumination and the colour temperature result of calculation (as shown in Figure 7) that drive different loads power under height 2 meters, the illumination E of target illumination field c-colour temperature CCT cwith bearing power P d, crelation between-target illumination plane coordinates (X, Y), can be obtained by following formula
E C ( P d , c , X , Y ) = ( - 0.00027 P d , c X 2 - 0.0022 P d , c X + 100 P d , c ) ( - 0.00024 P d , c Y 2 - 0.0002 P d , c Y + 100 P d , c ) 100 P d , c - - - ( 11 )
CCT C ( P d , c , X , Y ) = ( 0.51 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 12 )
By model (7)-(12) of illumination and colour temperature in above-mentioned differing heights situation, the illumination E of target illumination field c-colour temperature CCT cwith bearing power P d, crelation between-height H-target illumination plane coordinates (X, Y), can be obtained by following formula
E C ( P d , c , X , Y , H ) = [ ( 0.0006 H - 0.0015 ) P d , c X 2 + ( 0.002 H - 0.0062 ) P d , c X + ( - 300 H + 676 ) P d , c ] ( - 300 H + 676 ) P d , c [ ( 0.0006 H - 0.0014 ) P d , c Y 2 + ( 0.002 H - 0.006 ) P d , c Y + ( - 300 H + 676 ) P d , c ] - - - ( 13 )
CCT C ( P d , c , X , Y , H ) = ( 0.51 X + 6700 ) ( 0.522 Y + 6700 ) 6700 - - - ( 14 )
According to formula (13)-(14), just accurately can control to be in colour temperature and the illumination of cold light LED light source optional position in the plane of target illumination field in blending illumination system in arbitrary height situation.
Fixing with target illumination field distance by mixed white light LED information display system is 1 meter, 1.5 meters, 2 meters, cold light LED light source does not work, light LED light source (driving power 0.5W, 0.75W, 1W) is warmed up in independent driving, calculate position coordinates (0 on target illumination field, 0), (0,100mm), (0,200mm), (0,300mm), (0,400mm), (100mm, 0), (200mm, 0), the illumination of (300mm, 0), (400mm, 0) and colour temperature, as Figure 8-9, the illumination E of target illumination field w-colour temperature CCT wwith bearing power P d, Wrelation between-height H-target illumination plane coordinates (X, Y), can be obtained by following formula
E W ( P d , w , X , Y , H ) = [ ( 0.0004 H - 0.0011 ) P d , w X 2 + ( 0.0013 H - 0.0042 ) P d , w X + ( - 250 H + 621 ) P d , w ] ( - 250 H + 621 ) P d , w [ ( 0.00041 H - 0.00116 ) P d , w Y 2 + ( 0.0012 H - 0.0043 ) P d , w Y + ( - 250 H + 621 ) P d , w ] - - - ( 15 )
CCT W ( P d , w , X , Y , H ) = ( 0.12 X + 2900 ) ( 0.21 Y + 2900 ) 2900 - - - ( 16 )
According to formula (15)-(16), just accurately can control to be in the colour temperature and the illumination that warm up light LED light source optional position in the plane of target illumination field in arbitrary height situation in blending illumination system.
Based on independent illumination and colour temperature theoretical model (13)-(16) of cold light and warm light LED, the mixing illumination E of mixed white light LED illumination System in the present invention twith colour temperature CCT tcan be expressed by following formula
E T(P d,T,X,Y,H)=E C(P d,c,X,Y,H)+E W(P d,w,X,Y,H) (17)
CCT T ( P d , T , X , Y , H ) = E C ( P d , c , X , Y , H ) + E W ( P d , w , X , Y , H ) E C ( P d , c , X , Y , H ) CCT C ( P d , c , X , Y , H ) + E W ( P d , w , X , Y , H ) CCT W ( P d , w , X , Y , H ) - - - ( 18 )
According to formula (17)-(18), just accurately can control to be in colour temperature and the illumination of mixed white light LED illumination System optional position in the plane of target illumination field in arbitrary height situation.(namely FEEDBACK CONTROL is not carried out by transducer) under open loop control mode, calculated at different three-dimensional coordinate system (X by (17)-(18) model, Y, H) any illumination & colour temperature in system, required electrical power/electric current/duty ratio, is stored in single-chip microcomputer internal database.According to the illumination & color temperature target value required for user, call single-chip microcomputer internal library file array flexibly, produce triggering signal, control the luminous intensity of warm light and cold light LED in mixed white light LED information display system.
This internal system fixed temperature sensor and color sensor on the other hand, by LED thermal modeling and colorimetry model, can this illuminator junction temperature of dynamic monitoring, mixing colour temperature, mixing illumination, by non-linear illuminance model (17) & colour temperature model (18) proposed by the invention, regulate current amplitude or the duty ratio of mixed white light LED illumination System, thus reaching high accuracy control mixing colour temperature and illumination at different ambient temperatures, the FEEDBACK CONTROL flow process of this system is as shown in Figure 1.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. a mixed white light LED illumination System, is characterized in that, comprising: send multiple cold light LED light source of white light and multiple warm light LED light source for colour temperature mixing;
Two-way tunable optical AC/DC constant-current driving power supply; A road is wherein connected with multiple cold light LED light source; Another road is connected with described multiple warm light LED light source;
Detect the color sensor of the illumination & colour temperature of the mixed light of described multiple cold light LED light source and multiple warm light LED light source formation;
Detect the temperature sensor of the temperature of described multiple cold light LED light source and multiple warm light LED light source formation illuminator,
Control device, respectively with described two-way tunable optical AC/DC constant-current driving power supply, described color sensor and temperature sensor signal connect, and any one in the illumination & colour temperature and illuminator temperature of the mixed light that described color sensor and temperature sensor detect is when exceeding the threshold value of the illumination & colour temperature threshold value needed for mixed light of setting and illuminator temperature, the drive current applied to described cold light LED light source and warm light LED light source by the algorithm adjustment input two-way tunable optical AC/DC constant-current driving power supply of setting or duty ratio, until the illumination & colour temperature of the mixed light of described color sensor and temperature sensor detection and illuminator temperature are all positioned at the threshold value of the desired value sending out fixed.
2. mixed white light LED illumination System according to claim 1, is characterized in that, also comprises AC/DC constant voltage Switching Power Supply, and described AC/DC constant voltage Switching Power Supply is electrically connected with described control device.
3. mixed white light LED illumination System according to claim 1, is characterized in that, the colour temperature of described cold light LED light source is 7000K; The colour temperature of described warm light LED light source is 3000K.
4. the mixed white light LED illumination System according to any one of claims 1 to 3, is characterized in that, described control device is single-chip microcomputer.
5. the illumination of mixed white light LED illumination System and a control method for colour temperature, is characterized in that, comprise the following steps:
Obtain the illumination & colour temperature threshold value needed for mixed light and the temperature threshold of setting;
Detect illumination & colour temperature and the temperature of the mixed light of multiple cold light LED light source and the formation of warm light LED light source;
When in described detection color and temperature, any one exceeds illumination & colour temperature threshold value and the temperature threshold of described setting, control device according to setting the illumination & colour temperature needed for mixed light with it and temperature threshold control described two-way tunable optical AC/DC constant-current driving power supply to described multiple cold light LED light source and warm light LED light source applying different driving electric current or duty ratio by the algorithm of setting, until the illumination & colour temperature of the mixed light of described color sensor and temperature sensor detection and temperature are all positioned at the threshold value of the desired value of setting.
6. the illumination of mixed white light LED illumination System according to claim 5 and the control method of colour temperature, is characterized in that, described set algorithm is non-linear dimming & color feedback control algolithm.
CN201410758504.XA 2014-12-08 2014-12-08 A kind of control method of mixed white light LED illumination System and its illumination and colour temperature CN104540269B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106604470A (en) * 2016-12-30 2017-04-26 淮海工学院 Color temperature illumination tuning method and eye protection lamp thereof
CN106658873A (en) * 2017-02-28 2017-05-10 横店集团得邦照明股份有限公司 Nonlinear closed loop-based LED control system with adjustable light colors
CN107578749A (en) * 2017-10-26 2018-01-12 惠科股份有限公司 The brightness controlling device and method of LED source
CN107635319A (en) * 2017-10-26 2018-01-26 惠科股份有限公司 The brightness controlling device and method of LED source
CN107787086A (en) * 2017-11-01 2018-03-09 合肥艾斯克光电科技有限责任公司 The radio controllable LED lamp of variable color-temperature
CN108156700A (en) * 2017-12-19 2018-06-12 广州市雅江光电设备有限公司 A kind of LED lamp and control method for improving white light efficiency
CN109340603A (en) * 2018-11-29 2019-02-15 常州市友晟电子有限公司 A kind of glare index adjustable luminaire and its control method
CN109716862A (en) * 2016-04-27 2019-05-03 亮锐有限责任公司 The controller that warms is dimmed for LED
TWI678603B (en) * 2017-08-24 2019-12-01 財團法人工業技術研究院 Illumination system and control method thereof
US10609786B2 (en) 2017-08-24 2020-03-31 Industrial Technology Research Institute Illumination system and control method thereof
US10874008B2 (en) 2016-04-27 2020-12-22 Lumileds Llc Dim to warm controller for LEDs

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1715739A (en) * 2004-07-01 2006-01-04 尤罗登特股份公司 Dental lamp particularly for medical and dental surgeries
CN2927593Y (en) * 2006-04-30 2007-07-25 上海复展照明科技有限公司 Digital driving control circuit of red, green and blue triple color luminescent diode
CN101523982A (en) * 2006-10-06 2009-09-02 皇家飞利浦电子股份有限公司 Power supply device for light elements and method for supplying power to light elements
CN101536607A (en) * 2006-11-10 2009-09-16 皇家飞利浦电子股份有限公司 Method and driver for determining drive values for driving a lighting device
CN101666434A (en) * 2008-09-05 2010-03-10 建兴电子科技股份有限公司 Led lamp and method for producing a led lamp
CN101977463A (en) * 2010-09-16 2011-02-16 杭州汉徽光电科技有限公司 LED light source control system for intelligently culturing laying hens
EP2377370A2 (en) * 2008-12-12 2011-10-19 Koninklijke Philips Electronics N.V. Method for maximizing the performance of a luminaire
CN202425098U (en) * 2011-10-17 2012-09-05 肖勇 LED illumination drive circuit automatically modulating light according to ambient light
CN103104833A (en) * 2011-11-14 2013-05-15 普朗克股份有限公司 Color temperature regulating device for illumination, illumination apparatus, and method of regulating color temperature
CN103256555A (en) * 2013-06-06 2013-08-21 上海宏源照明电器有限公司 Electroless lamp illumination system capable of transforming specific spectrum components
CN203298178U (en) * 2013-06-06 2013-11-20 上海宏源照明电器有限公司 Electrodeless lamp illumination system with changeable specific spectral components
CN103415804A (en) * 2011-02-28 2013-11-27 科锐公司 Light devices, display devices, backlighting devices, edge-lighting devices, combination backlighting and edge-lighting devices
CN103675715A (en) * 2013-12-06 2014-03-26 深圳市清华环科检测技术有限公司 Energy conservation test module of illuminating system

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1715739A (en) * 2004-07-01 2006-01-04 尤罗登特股份公司 Dental lamp particularly for medical and dental surgeries
CN2927593Y (en) * 2006-04-30 2007-07-25 上海复展照明科技有限公司 Digital driving control circuit of red, green and blue triple color luminescent diode
CN101523982A (en) * 2006-10-06 2009-09-02 皇家飞利浦电子股份有限公司 Power supply device for light elements and method for supplying power to light elements
CN101536607A (en) * 2006-11-10 2009-09-16 皇家飞利浦电子股份有限公司 Method and driver for determining drive values for driving a lighting device
CN101666434A (en) * 2008-09-05 2010-03-10 建兴电子科技股份有限公司 Led lamp and method for producing a led lamp
EP2377370A2 (en) * 2008-12-12 2011-10-19 Koninklijke Philips Electronics N.V. Method for maximizing the performance of a luminaire
CN101977463A (en) * 2010-09-16 2011-02-16 杭州汉徽光电科技有限公司 LED light source control system for intelligently culturing laying hens
CN103415804A (en) * 2011-02-28 2013-11-27 科锐公司 Light devices, display devices, backlighting devices, edge-lighting devices, combination backlighting and edge-lighting devices
CN202425098U (en) * 2011-10-17 2012-09-05 肖勇 LED illumination drive circuit automatically modulating light according to ambient light
CN103104833A (en) * 2011-11-14 2013-05-15 普朗克股份有限公司 Color temperature regulating device for illumination, illumination apparatus, and method of regulating color temperature
CN103256555A (en) * 2013-06-06 2013-08-21 上海宏源照明电器有限公司 Electroless lamp illumination system capable of transforming specific spectrum components
CN203298178U (en) * 2013-06-06 2013-11-20 上海宏源照明电器有限公司 Electrodeless lamp illumination system with changeable specific spectral components
CN103675715A (en) * 2013-12-06 2014-03-26 深圳市清华环科检测技术有限公司 Energy conservation test module of illuminating system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109716862A (en) * 2016-04-27 2019-05-03 亮锐有限责任公司 The controller that warms is dimmed for LED
US10874008B2 (en) 2016-04-27 2020-12-22 Lumileds Llc Dim to warm controller for LEDs
CN106604470B (en) * 2016-12-30 2018-06-12 淮海工学院 A kind of colour temperature illumination harmony method
CN106604470A (en) * 2016-12-30 2017-04-26 淮海工学院 Color temperature illumination tuning method and eye protection lamp thereof
CN106658873B (en) * 2017-02-28 2018-06-05 横店集团得邦照明股份有限公司 A kind of light color adjustable LED control system based on nonlinear closed loop
CN106658873A (en) * 2017-02-28 2017-05-10 横店集团得邦照明股份有限公司 Nonlinear closed loop-based LED control system with adjustable light colors
TWI678603B (en) * 2017-08-24 2019-12-01 財團法人工業技術研究院 Illumination system and control method thereof
US10609786B2 (en) 2017-08-24 2020-03-31 Industrial Technology Research Institute Illumination system and control method thereof
WO2019080204A1 (en) * 2017-10-26 2019-05-02 惠科股份有限公司 Brightness control device and method for light-emitting diode light source
WO2019080205A1 (en) * 2017-10-26 2019-05-02 惠科股份有限公司 Apparatus and method for controlling brightness of light-emitting diode light source
CN107635319A (en) * 2017-10-26 2018-01-26 惠科股份有限公司 The brightness controlling device and method of LED source
CN107578749A (en) * 2017-10-26 2018-01-12 惠科股份有限公司 The brightness controlling device and method of LED source
CN107787086A (en) * 2017-11-01 2018-03-09 合肥艾斯克光电科技有限责任公司 The radio controllable LED lamp of variable color-temperature
CN108156700A (en) * 2017-12-19 2018-06-12 广州市雅江光电设备有限公司 A kind of LED lamp and control method for improving white light efficiency
CN109340603A (en) * 2018-11-29 2019-02-15 常州市友晟电子有限公司 A kind of glare index adjustable luminaire and its control method

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