CN104061552A - Scheme for lowering color temperature difference of LED light sources - Google Patents
Scheme for lowering color temperature difference of LED light sources Download PDFInfo
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- CN104061552A CN104061552A CN201410346688.9A CN201410346688A CN104061552A CN 104061552 A CN104061552 A CN 104061552A CN 201410346688 A CN201410346688 A CN 201410346688A CN 104061552 A CN104061552 A CN 104061552A
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Abstract
The invention discloses a scheme for lowering the color temperature difference of LED light sources. According to the scheme for lowering the color temperature difference of the LED light sources, the LED light sources are arranged in an LED lamp, the color temperature difference is lowered by conducting color mixing on the LED light sources, and thus the light quality of the LED light sources is improved. According to the color mixing method, with the color temperature of 3025 K as an example, a color zone with the color temperature ranging from 3025-75 K to 3025+75K is selected from a color zone, with the color temperature being 3025 K, of a MacAdam color zone graph so that a standard parallelogram can be obtained, a first parallelogram and a second parallelogram which are the same as the standard parallelogram in shape and size are longitudinally derived from the upper end and the lower end of the standard parallelogram, the color temperature of the first parallelogram and the color temperature of the second parallelogram respectively range from 3025-150 K to 3025+150 K, color mixing is conducted on the first LED light source with the color temperature in the first parallelogram and the second LED light source with the color temperature in the second parallelogram in the proportion of 1:1, so that the color temperature of lamplight obtained after color mixing is in the standard parallelogram, and standard light with the color difference ranging from -75K to +75K is achieved. The method for color mixing of LED light sources with other color temperatures is similar to the color mixing method.
Description
Technical field
The present invention relates to LED lighting field, particularly a kind of scheme that reduces LED color temperature difference.
Background technology
Colour temperature is the important indicator that judges the light quality of LED light source and even LED light fixture, LED light source in existing LED light fixture, the colour temperature marking in actual colour temperature and specifications has larger deviation, as the LED light source of 3025K, when its practical application, measuring the colour temperature of coming is 3025 ± 175K, some LED light sources only have 2850K, and some LED light sources have reached 3200K, have the deviation of 350K, the deviation of colour temperature has even reached 500K, as the LED light source of 6500K, when its practical application, measuring the colour temperature of coming is 6500 ± 500K, some LED light sources only have 6000K, some LED light sources have reached 7000K, even in a collection of LED light source, what have is partially blue, what have is partially green, colour temperature deviation is also larger, affect the light quality of LED light source and even LED light fixture, affect finished product light source or light fixture conforming photochromic, cause the partially blue partially green problem having having in a collection of, photochromic uneven, light poor quality, visible, reduce the important measures that colour temperature deviation improves LED light source and even LED light fixture light quality beyond doubt, but do not have at present method effective and that feasibility is high and reduces the colour temperature deviation of LED light source.Existing part producer, in order to control light quality, carries out strict checking on to the buying of LED light source material, must choose the material that photochromic uniformity is high, selects the particular B IN supply of material, and like this, the scope of buying is very narrow and small, and the Material Cost of LED light source is higher.
Therefore, how to realize that a kind of feasibility is high, the scheme of colour temperature deviation that can effective reduction LED light source is technical problem urgently to be resolved hurrily in the industry.
Summary of the invention
Main purpose of the present invention is to provide a kind of scheme of the LED of reduction color temperature difference, is intended to realize that a kind of feasibility is high, the scheme of colour temperature deviation that can effective reduction LED light source.
The present invention proposes a kind of scheme of the LED of reduction color temperature difference, in LED light fixture, be provided with LED light source, thereby LED light source is carried out to the light quality that colour mixture reduces color temperature difference and then improves LED light source, get the colour temperature of 3025K and make example, color mixing method is as follows: from the 3025K Se district of MacAdam look district figure, choose colour temperature Se district between 3025K ± 75K and form standard parallelogram, 4 angle points of standard parallelogram are A1(0.434, 0.4089), A2(0.4397, 0.4066), A3(0.4336, 0.3971), A4(0.4279, 0.3994), the colour temperature of A1 is 3066K, the colour temperature of A2 is 2955K, the colour temperature of A3 is 2981K, the colour temperature of A4 is 3091K, the slope of standard parallelogram is consistent with the slope of MacAdam's ellipse, from standard parallelogram upper end, lower end longitudinally derives respectively and all identical the first parallelogram of the shape size of standard parallelogram, the second parallelogram, the first parallelogram is adjacent to standard parallelogram upper end, the second parallelogram is adjacent to standard parallelogram lower end, 4 angle points of the first parallelogram are B1(0.4401, 0.4184), B2(0.4458, 0.4161), A2(0.4397, 0.4066), A1(0.434, 0.4089), 4 angle points of the second parallelogram are A4(0.4279, 0.3994), A3(0.4336, 0.3971), C3(0.4275, 0.3876), C4(0.4218, 0.3899), wherein, the colour temperature of B1 is 3038K, the colour temperature of B2 is 2932K, the colour temperature of C3 is 3006K, the colour temperature of C4 is 3122K, the first parallelogram, the reference color temperature of the second parallelogram is all 3025K ± 150K, colour temperature is positioned to the second LED light source that the first LED light source of the first parallelogram and colour temperature be positioned at the second parallelogram carries out colour mixture in the ratio of 1:1 and makes the colour temperature of the light after colour mixture be positioned at standard parallelogram, reach the standard light effect of color temperature difference in the scope of ± 75K, the color mixing method of the LED light source of other colour temperatures and said method are roughly the same.
Preferably, the brightness shelves of each BIN of the LED light source of colour mixture are consistent.
Preferably, the electric current of the LED light source by each colour mixture is identical.
Preferably, the LED light source series-fed of colour mixture.
Preferably, in each paths of LEDs light source of parallel operation, add equalizing control circuit.
The present invention discloses a kind of scheme of the LED of reduction color temperature difference, in LED light fixture, is provided with LED light source, thus the light quality that the present invention reduces colour temperature deviation and then improves LED light source by LED light source being carried out to colour mixture.Get the colour temperature of 3025K and make example, from the 3025K Se district of MacAdam look district figure, choose colour temperature Se district between 3025K ± 75K and form standard parallelogram, from standard parallelogram upper end, lower end longitudinally derives respectively and all identical the first parallelogram of the shape size of standard parallelogram, the second parallelogram, the first parallelogram, the reference color temperature of the second parallelogram is all 3025K ± 150K, colour temperature is positioned to the second LED light source that the first LED light source of the first parallelogram and colour temperature be positioned at the second parallelogram carries out colour mixture in the ratio of 1:1 and makes the colour temperature of the light after colour mixture be positioned at standard parallelogram, reach the standard light effect of color temperature difference in the scope of ± 75K, the color mixing method of the LED light source of other colour temperatures and said method are roughly the same.
Brief description of the drawings
Fig. 1 is an embodiment Se district figure of a kind of scheme that reduces LED color temperature difference of the present invention, X-axis, Y-axis are chromaticity coordinate axle, in figure, show standard parallelogram, the first parallelogram, the second parallelogram, the stain in figure is that existing LED encapsulation output distributes;
Fig. 2 is an embodiment Se district figure of a kind of scheme that reduces LED color temperature difference of the present invention, and X-axis, Y-axis are chromaticity coordinate axle, show standard parallelogram in figure, and the stain in figure is to distribute by the encapsulation output after this programme colour mixture.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Referring to figs. 1 through Fig. 2, one embodiment of the scheme of a kind of LED of reduction color temperature difference of the present invention is proposed, colour temperature is the important indicator that judges the light quality of LED light source and even LED light fixture, LED light source in existing LED light fixture, the colour temperature marking in actual colour temperature and specifications has larger deviation, as the LED light source of 3025K, when its practical application, measuring the colour temperature of coming is 3025 ± 175K, some LED light sources only have 2850K, and some LED light sources have reached 3200K, have the deviation of 350K; The deviation of colour temperature has even reached 500K, as the LED light source of 6500K, when its practical application, measuring the colour temperature of coming is 6500 ± 500K, some LED light sources only have 6000K, and some LED light sources have reached 7000K, even with in a collection of LED light source, what have is partially blue, what have is partially green, and colour temperature deviation is also larger, has affected the light quality of LED light source and even LED light fixture.Reduce the deviation of colour temperature and improve beyond doubt the important measures of LED light source and even LED light fixture light quality, but do not have at present method effective and that feasibility is high and reduce the colour temperature deviation of LED light source.Thereby the method that the present invention proposes the light quality that reduces colour temperature deviation raising LED light fixture, is provided with LED light source in LED light fixture, thereby the light quality that the present invention reduces color temperature difference and then improves LED light source by LED light source being carried out to colour mixture.
Get the colour temperature of 3025K and make example, color mixing method is as follows: from the 3025K Se district of MacAdam look district figure, choose colour temperature Se district between 3025K ± 75K and form standard parallelogram, 4 angle points of standard parallelogram are A1(0.434, 0.4089), A2(0.4397, 0.4066), A3(0.4336, 0.3971), A4(0.4279, 0.3994), the colour temperature of A1 is 3066K, the colour temperature of A2 is 2955K, the colour temperature of A3 is 2981K, the colour temperature of A4 is 3091K, the slope of standard parallelogram is consistent with the slope of MacAdam's ellipse, from standard parallelogram upper end, lower end longitudinally derives respectively and all identical the first parallelogram of the shape size of standard parallelogram, the second parallelogram, the first parallelogram is adjacent to standard parallelogram upper end, the second parallelogram is adjacent to standard parallelogram lower end, 4 angle points of the first parallelogram are B1(0.4401, 0.4184), B2(0.4458, 0.4161), A2(0.4397, 0.4066), A1(0.434, 0.4089), 4 angle points of the second parallelogram are A4(0.4279, 0.3994), A3(0.4336, 0.3971), C3(0.4275, 0.3876), C4(0.4218, 0.3899), wherein, the colour temperature of B1 is 3038K, the colour temperature of B2 is 2932K, the colour temperature of C3 is 3006K, the colour temperature of C4 is 3122K, the first parallelogram, the reference color temperature of the second parallelogram is all 3025K ± 150K, colour temperature is positioned to the second LED light source that the first LED light source of the first parallelogram and colour temperature be positioned at the second parallelogram carries out colour mixture in the ratio of 1:1 and makes the colour temperature of the light after colour mixture be positioned at standard parallelogram, reach the standard light effect of color temperature difference in the scope of ± 75K.The color mixing method of the LED light source of other colour temperatures and said method are roughly the same.
In Fig. 1, shown standard parallelogram, the first parallelogram, the second parallelogram, the stain in figure is that existing LED encapsulation output distributes, visible, in standard parallelogram, the first parallelogram, the second parallelogram, is distributed with stain.Fig. 2 has shown that visible, the LED after colour mixture is substantially in standard parallelogram by the encapsulation output distribution after this programme colour mixture, and colour temperature, between 3025K ± 75K, reaches standard light effect.
The basic skills that colour mixture is calculated is weighted average, and in order to simplify the complexity of calculating and reducing application, the prerequisite that colour mixture is calculated is as follows: 1, the brightness shelves of each BIN of the LED light source of colour mixture are consistent.If mixed with the LED light source of different brightness shelves, except colour temperature variable, when calculating, also to consider this variable of brightness so, this can increase and calculates and the complexity of application.2, the electric current of the LED light source by each colour mixture is identical.This prerequisite is the same with the reason of prerequisite 1, and the electric current of different LED light source can cause brightness difference, and this can increase the complexity of calculating and applying.Therefore, in the time of concrete application, as far as possible all LED light source series-feds, each paths of LEDs light source of parallel operation will add equalizing control circuit.If for the consideration of cost, when each paths of LEDs light source in parallel does not adopt equalizing control circuit, the BIN of LED light source of every road series connection and the LED light source number of each BIN want consistent, the series connection total voltage that can ensure so every paths of LEDs light source approaches, thereby ensures that the electric current uniformity of every paths of LEDs light source is high.
The main purpose that LED light source is carried out to colour mixture is to obtain finished product light source or light fixture is conforming photochromic, thereby the partially blue partially green problem having of avoiding having in a collection of lamp, another object of colour mixture is can be all BIN(color block) LED light source can use.The advantage of colour mixture is apparent: 1, can make the photochromic uniformity of whole lamp high; 2, without selecting the BIN supply of material, ample supply and prompt delivery and in extensive range; 3, the LED light source of all BIN can adopt, and LED light source low price, effectively reduces production costs.
In addition, carry out colour mixture to reduce the method for colour temperature deviation raising light quality thereby adopt by corresponding LED light source, the buying of LED light source material and management are comparatively complicated, need to improve to purchase and administrative mechanism, production and processing is comparatively complicated, needs to formulate and improve the concrete operation of production and processing.Thus, the points for attention of colour mixture application are as follows: 1, LED light source material need to be exclusively managed by a specially-assigned person, and the LED light source materiel warehouse-in that colour mixture is used and outbound all will have special quality personnel to manage, and quality personnel need to accept necessary colour mixture application training could be on duty.2, add man-hour requirement one BIN mono-charging tray, do the independent charging pan for LED light source that LED light source paster adds each point of BIN in man-hour, paster is that the different point BIN of symmetrical paster is in the processing guidance providing according to developing department, to obtain uniform color blending effect, LED colour mixture paster processing staff need to accept necessary colour mixture application training could be on duty.3, early development design is thorough, and developer realizes the colour temperature target that uniformity is high except considering in the time doing colour mixture design early stage, also will consider the supply of material regularity of distribution of brightness shelves and the voltage gear of LED light source.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure transformation that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. one kind is reduced the scheme of LED color temperature difference, in LED light fixture, be provided with LED light source, it is characterized in that, thereby LED light source is carried out to the light quality that colour mixture reduces color temperature difference and then improves LED light source, get the colour temperature of 3025K and make example, color mixing method is as follows: from the 3025K Se district of MacAdam look district figure, choose colour temperature Se district between 3025K ± 75K and form standard parallelogram, 4 angle points of standard parallelogram are A1(0.434, 0.4089), A2(0.4397, 0.4066), A3(0.4336, 0.3971), A4(0.4279, 0.3994), the colour temperature of A1 is 3066K, the colour temperature of A2 is 2955K, the colour temperature of A3 is 2981K, the colour temperature of A4 is 3091K, the slope of standard parallelogram is consistent with the slope of MacAdam's ellipse, from standard parallelogram upper end, lower end longitudinally derives respectively and all identical the first parallelogram of the shape size of standard parallelogram, the second parallelogram, the first parallelogram is adjacent to standard parallelogram upper end, the second parallelogram is adjacent to standard parallelogram lower end, 4 angle points of the first parallelogram are B1(0.4401, 0.4184), B2(0.4458, 0.4161), A2(0.4397, 0.4066), A1(0.434, 0.4089), 4 angle points of the second parallelogram are A4(0.4279, 0.3994), A3(0.4336, 0.3971), C3(0.4275, 0.3876), C4(0.4218, 0.3899), wherein, the colour temperature of B1 is 3038K, the colour temperature of B2 is 2932K, the colour temperature of C3 is 3006K, the colour temperature of C4 is 3122K, the first parallelogram, the reference color temperature of the second parallelogram is all 3025K ± 150K, colour temperature is positioned to the second LED light source that the first LED light source of the first parallelogram and colour temperature be positioned at the second parallelogram carries out colour mixture in the ratio of 1:1 and makes the colour temperature of the light after colour mixture be positioned at standard parallelogram, reach the standard light effect of color temperature difference in the scope of ± 75K, the color mixing method of the LED light source of other colour temperatures and said method are roughly the same.
2. a kind of scheme that reduces LED color temperature difference according to claim 1, is characterized in that, the brightness shelves of each BIN of the LED light source of colour mixture are consistent.
3. a kind of scheme that reduces LED color temperature difference according to claim 2, is characterized in that, the electric current of the LED light source by each colour mixture is identical.
4. a kind of scheme that reduces LED color temperature difference according to claim 3, is characterized in that, the LED light source series-fed of colour mixture.
5. a kind of scheme that reduces LED color temperature difference according to claim 3, is characterized in that, in each paths of LEDs light source of parallel operation, adds equalizing control circuit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110708826A (en) * | 2019-10-15 | 2020-01-17 | 青岛亿联客信息技术有限公司 | Control method, system, equipment and storage medium of multi-color lamp |
| CN111667148A (en) * | 2020-05-13 | 2020-09-15 | 浙江云科智造科技有限公司 | Quality control method for LED production line |
| CN114967191A (en) * | 2022-04-18 | 2022-08-30 | 信利光电股份有限公司 | Display module color coordinate control method |
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| CN110708826A (en) * | 2019-10-15 | 2020-01-17 | 青岛亿联客信息技术有限公司 | Control method, system, equipment and storage medium of multi-color lamp |
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| CN114967191B (en) * | 2022-04-18 | 2023-09-22 | 信利光电股份有限公司 | Color coordinate control method for display module |
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