CN102588805A - Color temperature adjustable LED (light emitting diode) device and color temperature adjustable lamp - Google Patents

Color temperature adjustable LED (light emitting diode) device and color temperature adjustable lamp Download PDF

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Publication number
CN102588805A
CN102588805A CN2012100757652A CN201210075765A CN102588805A CN 102588805 A CN102588805 A CN 102588805A CN 2012100757652 A CN2012100757652 A CN 2012100757652A CN 201210075765 A CN201210075765 A CN 201210075765A CN 102588805 A CN102588805 A CN 102588805A
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China
Prior art keywords
loop
led
colour temperature
led chip
chip
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CN2012100757652A
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Chinese (zh)
Inventor
潘利兵
刘文奎
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Foshan NationStar Optoelectronics Co Ltd
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Foshan NationStar Optoelectronics Co Ltd
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Priority to CN2012100757652A priority Critical patent/CN102588805A/en
Publication of CN102588805A publication Critical patent/CN102588805A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a color temperature adjustable LED (light emitting diode) device, comprising a substrate, an LED chip loop arranged on the substrate and packaging adhesive covering on the substrate, wherein the LED chip loop comprises a first loop and a second loop, the first loop is at least in series connection with a green LED chip and a red LED chip, the main wavelength of the red LED chip is 605nm to 625nm, and the driving current of the first loop can be adjusted; and the second loop is used for synthesizing white light. The color temperature adjustable LED device has the advantages of simple structure, convenience for use and low manufacturing cost, and the effects of wide adjustable range, low color tolerance, and color coordinate variation trend identical with the Planck black body curve can be achieved only by using a simple driving and control power supply.

Description

A kind of colour temperature adjustable LED device and the adjustable light fixture of colour temperature
Technical field
The present invention relates to LED encapsulation technology field, relates in particular to a kind of colour temperature adjustable LED device and the adjustable light fixture of colour temperature.
Background technology
LED is with its good performance combined with intelligent control system; Be applied to the indoor and outdoor lighting occasion more and more, but also colourity indexs such as its colour temperature, colour rendering index proposed new requirement simultaneously, in order to tackle this requirement; At present, LED production firm is devoted to study the adjustable LED of colour temperature.Colour temperature is the photochromic yardstick of expression light source, and unit is K (Kelvin).The colour temperature of light source is to confirm with theoretical hot dark matter radiant body through the color that contrasts it.Kelvin degree when the color of hot dark matter radiant body and light source is complementary is exactly the colour temperature of that light source, it directly and the Planck blackbody radiation law interrelate.
In the prior art; Adjustable color temperature LED device mainly contains following implementation method: wherein a kind of use three primary colours chip is formed independent loop; The white light that synthesizes different-colour through the drive current of regulating each loop; But the LED device of this adjustable color temperature, the colour rendering of its white light are generally all relatively poor, do not reach the general illumination requirement; Also have a kind of blue led chip excitated fluorescent powder that is to use to produce white light and redness (or yellow) led chip combination; Synthesize the white light of different-colour through regulating redness (or yellow) drive current of led chip; But this adjustable color temperature LED device; The most of color temperature regions look of its white light tolerance is bigger, and it is far away that chromaticity coordinates departs from the Planck blackbody curve, feels very uncomfortable during as illumination; Form independent loop by a kind of blue led chip excitated fluorescent powder generation white light and three primary colours chip of being to use again; The white light that synthesizes different-colour through the brightness of each loop chip of intelligent drive circuit control; But need adjustment four road drive currents to mate each coloured light; And the brightness of led chip and drive current be not strict linear relationship, and this makes drive circuit become complicated, increases extra cost.
Summary of the invention
In view of this, the objective of the invention is to, a kind of colour temperature adjustable LED device is provided, improve the colour temperature adjustable range, reduce the look range of tolerable variance.Based on this, the present invention also provides a kind of light fixture, is provided with this colour temperature adjustable LED device.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of colour temperature adjustable LED device; Comprise substrate and be arranged on the led chip loop on the substrate and cover the packaging plastic on the substrate; Said led chip loop comprises first loop and second loop; At least be serially connected with green LED chip and red LED chips in said first loop, the dominant wavelength of said red LED chips is 605nm-625nm, and the drive current in said first loop is adjustable; Said second loop is in order to synthesize white light.
Preferably, said first loop is formed by green LED chip and red LED chips serial connection.
Preferably, the light of green LED chip and red LED chips is logical than being 2: 1-2: 3.
Preferably, said first loop is formed by green LED chip, red LED chips, yellow led chip serial connection.
Preferably, the light of said green LED chip, red LED chips, yellow led chip is logical than being 2: 1: 1-2: 3: 3.
Preferably, be provided with the blue led chip in said second loop, form white light by blue led chip excitated fluorescent powder, said fluorescent material is mixture or the mixture or the yellow fluorescent powder red, the green fluorescence powder of orange, green fluorescence powder; Said fluorescent material coating method adopts and directly is coated in said blue led chip surface, perhaps is blended in the packaging plastic, does not perhaps apply with the remote excitation that blue chip directly contacts.
Preferably; Be provided with the ultraviolet leds chip in said second loop; Excite red, green, blue fluorescent material to form white light by said ultraviolet leds chip, said red, green, blue fluorescent material coating method adopts and directly is coated in said blue led chip surface, perhaps is blended in the packaging plastic, does not perhaps apply with the remote excitation that blue chip directly contacts.。
Preferably, be provided with the electric current regulated power supply in said first loop.
Preferably, form a reflection cavity on the said substrate, said first loop and second loop are arranged on the bottom of reflection cavity.
The adjustable light fixture of a kind of colour temperature of the present invention is provided with aforesaid colour temperature adjustable LED device.
State with existing skill and to compare, colour temperature adjustable LED device of the present invention is provided with first loop, second loop; Second loop is in order to synthesize white light, and first loop is serially connected with red LED chips and the green LED chip that dominant wavelength is 605nm-625nm at least, and electric current is adjustable; Because dominant wavelength is that the brightness and the drive current linear relationship of red LED chips of 605nm-625nm is better, the brightness of green LED chip and drive current linear relationship are relatively poor relatively, are that the red LED chips of 605nm-625nm is connected with the green LED chip with dominant wavelength; When drive current increases; The red light ratio that increases is many than green light, so the dominant wavelength of synthetic sodium yellow can be drifted about to red direction along with the increase of electric current, itself and positive white light is mated; " lever principle " according to light modulation; The chromaticity coordinates variation tendency of synthesize white light is consistent with the Planck blackbody curve, this shows, the present invention is simple in structure, easy to use, low cost of manufacture; Only need simple drive control power supply, just can realize the effect that adjustable extent is wide, the look tolerance is little, the chromaticity coordinates variation tendency is identical with the Planck blackbody curve.
Description of drawings
Fig. 1 is the structural representation of colour temperature adjustable LED device embodiment one of the present invention;
Fig. 2 is the longitudinal sectional view of colour temperature adjustable LED device among Fig. 1;
Fig. 3 is the structural representation of colour temperature adjustable LED device embodiment two of the present invention;
Fig. 4 is that the chromaticity coordinates of colour temperature adjustable LED device in the embodiment of the invention one changes sketch map;
Fig. 5 is that the chromaticity coordinates of colour temperature adjustable LED device in the embodiment of the invention two changes sketch map;
Among the figure, relevant Reference numeral is following:
A---colour temperature control section;
A1---positive pole;
A2---negative pole;
B---white light control section;
B1---positive pole;
B2---negative pole;
1---substrate;
2---red LED chips;
3---the green LED chip;
4---the blue led chip;
5---packing colloid;
6---the yellow led chip;
7---the ultraviolet leds chip.
The specific embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and through concrete embodiment.
Embodiment one
Referring to Fig. 1, Fig. 2, the colour temperature adjustable LED device in the present embodiment comprises two parts: colour temperature control section A, white light control section B.Particularly, the colour temperature adjustable LED device of present embodiment comprises substrate 1, is arranged on red LED chips 2, green LED chip 3, blue led chip 4 on the substrate 1, is filled in the packing colloid 5 in the reflection cavity of substrate 1.In the present embodiment, forming a longitudinal section on the substrate is up big and down small trapezoidal reflection cavity, and red LED chips 2, green LED chip 3, blue led chip 4 all are arranged on the bottom of reflection cavity.
Wherein, red LED chips 2 is cascaded with green LED chip 3, is connected with anodal A1, negative pole A2 respectively, constitutes first loop, and the electric current in first loop is adjustable.The electric current of realizing first loop is adjustable, can adopt the mode that the adjustable current power supply is set.
Wherein, in the present embodiment, red LED chips 2 is logical than being with the light of green LED chip 3: G: R=2: 1.In other embodiments, also optional use up logical than the red LED chips and the green LED chip that are 1: 1 or 2: 3, perhaps 2: 1-2: any ratio in 3.Red LED chips is logical than selecting 2 with the light of green LED chip: 1-2: within 3 the scope, reason is that the ratio of ruddiness increases along with the increase of series loop electric current, and its chromaticity coordinates changed along blackbody curve when this had just realized device adjusting colour temperature.Not in this scope, it is far away that the chromaticity coordinates of the device of realization departs from blackbody curve like the ratio of light green, ruddiness, and the color relation of light is very undesirable.
Blue led chip 4 is arranged in second loop, and two ends are connected with anodal B1 and negative pole B2, the current constant in this second loop.Be mixed with red, green fluorescence powder in the packing colloid 5, in second loop, that the blue led chip excites is red, the green fluorescence powder forms white light.In the present embodiment, red, green fluorescence powder is mixed in the packing colloid 5, in other embodiments, also can be with surface red, that the green fluorescence powder directly is coated in blue led chip 4, perhaps red, green fluorescence powder does not directly contact (being the remote excitation coating method) with blue chip.In other embodiments, also can adopt other fluorescent material, like orange, green fluorescence powder, perhaps yellow fluorescent powder.
In the present embodiment, select for use red LED chips to be connected in series and form first loop with the green LED chip, the dominant wavelength 613nm of red LED chips, in other embodiments, can select dominant wavelength for use is the red LED chips of other values among the 605nm-625nm.
Colour temperature adjustable LED device in the present embodiment can be implemented in the 2700K-6500K color temperature regions adjustable; And chromaticity coordinates changes along the Planck blackbody curve, meets the chromaticity index requirement of solid-state illumination product, and the look tolerance is little; And colour rendering index reaches the general illumination requirement more than 70 in the full gamut.
Colour temperature adjustable LED device in the present embodiment; Red LED chips is set connects with the green LED chip and forms the first variable loop of electric current; Because the brightness and the drive current linear relationship of red LED chips are better; The brightness of green LED chip and drive current linear relationship are relatively poor relatively, red LED chips are connected with the green LED chip, when drive current increases; The red light ratio that increases is many than green light, so the dominant wavelength of synthetic sodium yellow can be drifted about to red direction along with the increase of electric current.With itself and positive white light coupling, according to " lever principle " of light modulation, the chromaticity coordinates variation tendency of synthesize white light is consistent with the Planck blackbody curve.Present embodiment is only established two loops, and simple in structure, easy to use, low cost of manufacture only need simple drive control power supply, just can realize the effect that adjustable extent is wide, the look tolerance is little, the chromaticity coordinates variation tendency is identical with the Planck blackbody curve.
Embodiment two
Referring to Fig. 3, the difference of present embodiment and embodiment one is:
1, first loop in the present embodiment is formed by green LED chip 3, red LED chips 2, yellow led chip 6 serial connections, and three's light is logical than being 2: 1: 1, also can be 2: 1: 1-2: any value in 3: 3;
2, in second loop in the present embodiment ultraviolet leds chip 7 is set, is mixed with red, green, blue fluorescent material in the packaging plastic.In other embodiments, can red, green, blue fluorescent material directly be coated in the surface of ultraviolet leds chip 7, perhaps red, green, blue fluorescent material does not directly contact (being the remote excitation coating method) with the ultraviolet light chip yet
Utilize colour temperature adjustable LED device of the present invention, can process the adjustable decoration of colour temperature, lighting.
Below through experimental data effect of the present invention is verified.
Experiment one:
This experiment is that the colour temperature adjustable LED device that is directed against embodiment one carries out.Used instrument is a standard LED tester, regulates the electric current in colour temperature adjustable LED device first loop, data such as following tables 1 such as the apparent finger that records:
Table 1
X Y Colour temperature/K Show and refer to R, G electric current/mA R, G pressure drop/V
0.3122 0.3297 6406 70.3 ?0.0 0
0.3238 0.3395 5898 71.7 ?1.0 4.45
0.3305 0.3471 5586 75.0 ?2.0 4.54
0.3372 0.3534 5313 78.0 ?3.0 4.60
0.3434 0.3585 5085 81.1 ?4.0 4.64
0.3493 0.3628 4887 83.9 ?5.0 4.68
0.3550 0.3665 4706 86.4 ?6.0 4.72
0.3604 0.3697 4548 88.6 ?7.0 4.75
0.3651 0.3724 4417 90.6 ?8.0 4.78
0.3701 0.3748 4280 92.3 ?9.0 4.81
0.3748 0.3770 4160 93.1 ?10.0 4.84
0.3848 0.3812 3917 92.8 ?12.5 4.90
0.3941 0.3846 3710 91.2 ?15.0 4.96
0.4022 0.3870 3538 89.2 ?17.5 5.01
0.4083 0.3891 3421 87.7 ?20.0 5.05
0.4154 0.3906 3286 85.4 ?22.5 5.11
0.4220 0.3917 3166 84.0 ?25.0 5.15
0.4272 0.3928 3077 81.9 ?27.5 5.20
0.4308 0.3938 3020 81.0 ?30.0 5.23
0.4367 0.3942 2921 79.7 ?32.5 5.28
0.4411 0.3946 2853 78.2 ?35.0 5.32
0.4455 0.3949 2785 76.7 ?37.5 5.36
0.4493 0.3951 2729 75.5 ?40.0 5.40
0.4480 0.3965 2760 74.9 42.5 5.41
0.4541 0.3959 2664 73.9 45.0 5.47
0.4588 0.3956 2596 72.7 47.5 5.51
0.4617 0.3957 2557 72.1 50.0 5.55
Can be drawn by above data: the colour temperature adjustable LED device of present embodiment can realize that the 2500K-6500K colour temperature is adjustable, and shows finger all more than 70.
Referring to Fig. 4, the chromaticity coordinates changing trend diagram that above-mentioned data are processed, visible, the chromaticity coordinates of the colour temperature adjustable LED device of present embodiment changes consistent with the variation tendency of blackbody curve.
Experiment two
This experiment is to carry out to the colour temperature adjustable LED device of implementing two.Used instrument is a standard LED tester, regulates the electric current in colour temperature adjustable LED device first loop, data such as following tables 2 such as the apparent finger that records:
Table 2
Can be drawn by above data: with the mode of red, green, yellow led chip series connection, realize that basically the device colour temperature is adjustable in vain to warming up from just in vain, colour rendering index is more than 70.
Referring to Fig. 5, the chromaticity coordinates changing trend diagram that Fig. 5 processes for above-mentioned data, visible, the chromaticity coordinates of the colour temperature adjustable LED device of present embodiment changes consistent with the variation tendency of blackbody curve.
More than the present invention has been carried out detailed introduction, use concrete example in the literary composition principle of the present invention and embodiment set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (10)

1. colour temperature adjustable LED device; Comprise substrate and be arranged on the led chip loop on the substrate and cover the packaging plastic on the substrate; It is characterized in that said led chip loop comprises first loop and second loop, be serially connected with green LED chip and red LED chips at least in said first loop; The dominant wavelength of said red LED chips is 605nm-625nm, and the drive current in said first loop is adjustable; Said second loop is in order to synthesize white light.
2. colour temperature adjustable LED device according to claim 1 is characterized in that, said first loop is formed by green LED chip and red LED chips serial connection.
3. colour temperature adjustable LED device according to claim 2 is characterized in that, the light of green LED chip and red LED chips is logical than being 2: 1-2: 3.
4. colour temperature adjustable LED device according to claim 1 is characterized in that, said first loop is formed by green LED chip, red LED chips, yellow led chip serial connection.
5. colour temperature adjustable LED device according to claim 4 is characterized in that, the light of said green LED chip, red LED chips, yellow led chip is logical than being 2: 1: 1-2: 3: 3.
6. colour temperature adjustable LED device according to claim 1; It is characterized in that; Be provided with the blue led chip in said second loop, form white light by blue led chip excitated fluorescent powder, said fluorescent material is mixture or the mixture or the yellow fluorescent powder red, the green fluorescence powder of orange, green fluorescence powder; Said fluorescent material coating method adopts and directly is coated in said blue led chip surface, perhaps is blended in the packaging plastic, does not perhaps apply with the remote excitation that blue chip directly contacts.
7. colour temperature adjustable LED device according to claim 1; It is characterized in that; Be provided with the ultraviolet leds chip in said second loop; Excite red, green, blue fluorescent material to form white light by said ultraviolet leds chip, said red, green, blue fluorescent material coating method adopts and directly is coated in said blue led chip surface, perhaps is blended in the packaging plastic, does not perhaps apply with the remote excitation that blue chip directly contacts.
8. colour temperature adjustable LED device according to claim 1 is characterized in that, is provided with the electric current regulated power supply in said first loop.
9. colour temperature adjustable LED device according to claim 1 is characterized in that, forms a reflection cavity on the said substrate, and said first loop and second loop are arranged on the bottom of reflection cavity.
10. the adjustable light fixture of colour temperature is characterized in that, is provided with each described colour temperature adjustable LED device like claim 1-9.
CN2012100757652A 2012-03-20 2012-03-20 Color temperature adjustable LED (light emitting diode) device and color temperature adjustable lamp Pending CN102588805A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061552A (en) * 2014-07-21 2014-09-24 中山市泓昌光电科技有限公司 Scheme for lowering color temperature difference of LED light sources
CN105163419A (en) * 2015-07-08 2015-12-16 复旦大学 High color saturation white light LED illumination system and mixed color design method thereof
CN105318235A (en) * 2014-07-28 2016-02-10 广东德豪润达电气股份有限公司 Light source, control method thereof and luminaire provided with light source
CN105738077A (en) * 2015-11-30 2016-07-06 肇庆市立得电子有限公司 Standard setting method and test method of color tolerance adjustment of an arbitrary light source
CN111207308A (en) * 2020-02-24 2020-05-29 轻工业部南京电光源材料科学研究所 LED light source capable of realizing any color

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1949507A (en) * 2005-10-12 2007-04-18 林志泽 LED device capable of regulating colour temp
CN101801141A (en) * 2010-03-25 2010-08-11 东华大学 Method for acquiring high color rendering white light with adjustable color temperature from combination of cool white, red, yellow and green LEDs
WO2010090289A1 (en) * 2009-02-05 2010-08-12 シーシーエス株式会社 Led light emitting device
US20110273107A1 (en) * 2010-05-08 2011-11-10 Lightel Technologies Inc. Solid-state lighting of a white light with tunable color temperatures
CN202082794U (en) * 2010-12-14 2011-12-21 景德镇正宇奈米科技有限公司 Luminous source device capable of adjusting color temperature

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1949507A (en) * 2005-10-12 2007-04-18 林志泽 LED device capable of regulating colour temp
WO2010090289A1 (en) * 2009-02-05 2010-08-12 シーシーエス株式会社 Led light emitting device
CN101801141A (en) * 2010-03-25 2010-08-11 东华大学 Method for acquiring high color rendering white light with adjustable color temperature from combination of cool white, red, yellow and green LEDs
US20110273107A1 (en) * 2010-05-08 2011-11-10 Lightel Technologies Inc. Solid-state lighting of a white light with tunable color temperatures
CN202082794U (en) * 2010-12-14 2011-12-21 景德镇正宇奈米科技有限公司 Luminous source device capable of adjusting color temperature

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104061552A (en) * 2014-07-21 2014-09-24 中山市泓昌光电科技有限公司 Scheme for lowering color temperature difference of LED light sources
CN105318235A (en) * 2014-07-28 2016-02-10 广东德豪润达电气股份有限公司 Light source, control method thereof and luminaire provided with light source
CN105163419A (en) * 2015-07-08 2015-12-16 复旦大学 High color saturation white light LED illumination system and mixed color design method thereof
CN105163419B (en) * 2015-07-08 2017-07-07 复旦大学 High color saturation White-light LED illumination system and its color mixing designs method
CN105738077A (en) * 2015-11-30 2016-07-06 肇庆市立得电子有限公司 Standard setting method and test method of color tolerance adjustment of an arbitrary light source
CN105738077B (en) * 2015-11-30 2018-08-10 肇庆市立得电子有限公司 A kind of the standard formulation method and test method of any light source color tolerance
CN111207308A (en) * 2020-02-24 2020-05-29 轻工业部南京电光源材料科学研究所 LED light source capable of realizing any color

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Application publication date: 20120718