CN104093247B - A kind of full gamut multichannel color mixing method - Google Patents
A kind of full gamut multichannel color mixing method Download PDFInfo
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- CN104093247B CN104093247B CN201410315235.XA CN201410315235A CN104093247B CN 104093247 B CN104093247 B CN 104093247B CN 201410315235 A CN201410315235 A CN 201410315235A CN 104093247 B CN104093247 B CN 104093247B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The invention belongs to technical field of semiconductor illumination, be specially a kind of full gamut multichannel color mixing method. The present invention utilize four parameter vectors (<i>Zi</i>,？<i>K1j</i>,？<i>K2k</i>,<i>K3l</i>) the monochromatic LED packaging of controlling N group (N>=5) different dominant wavelengths carries out colour mixture, every group of LED device is at least made up of 1 above LED chip or module, does is dominant wavelength distributed in 380 780? in nm wave-length coverage. Need to show corresponding photochromic of certain chromaticity coordinates time, shape and color territory, the reproducible N of described LED device limit is divided into 2 subregion triangle colour gamuts of N, determines the triangle position at the photochromic place of target by addressing<i>Zi</i>, by regulating LED device light corresponding to this triangular apex to lead to ratio<i>K1j</i>,？<i>K2k</i>,<i>K3l</i>, it is photochromic that mixed light obtains required target. The present invention has improved the gamut area that can reappear greatly, has realized more colourful color and has shown, for sight Lighting Design has been opened up more possibility; The present invention, in guaranteeing to reappear on a large scale colour gamut, can reduce again the volume of transmitted data of control end.
Description
Technical field
The invention belongs to technical field of semiconductor illumination, be specifically related to a kind of full gamut multichannel color mixing method.
Background technology
LED colour mixture technology is a lot of in applications such as general illumination, sight illumination, decors, its principle is to choose monochromatic light that the LED of different dominant wavelengths sends as primary colors, these primary colors are mixed with certain proper proportion, thereby produce the photochromic of a kind of new predetermined color. In chromaticity diagram, connect the photochromic chromaticity coordinates of multiple colour mixtures LED, surround a polygon, the colour gamut that this polygon comprises just defines the photochromic scope that these LED can mixed light obtain.
Common colour mixture technology is limited to RGB three primary colours colour mixture, and generally using dominant wavelength is the red LED of 610 640nm, and dominant wavelength is that green LED and the dominant wavelength of 510 540nm is the blue led of 450 480nm. The defect of doing is like this: the gamut area that the chromaticity coordinates of primary colours surrounds is large not, and the major part in cannot reproduction gamut is photochromic, can only reappear 30% left and right of full gamut; Colour mixture result inaccuracy, has a larger deviation with target is photochromic.
Patent US7113152 has proposed the equipment, the system and method that show for the true colour display screen of electronics, uses at least four kinds of primary colors colour mixtures the path with the light of controller control four primaries, thus the light image that produces coloured image. Patent CN202796949 has proposed the LED light fixture that a kind of five colors mix, use red, green, blue, Huang, white, five kinds of colors are carried out colour mixture, its gamut area may be compared conventional method and make moderate progress, but above-mentioned patent does not relate to colour mixture control technology, and Five-channel control makes the traffic excessive, in the more difficult realization of technological layer. Patent EP1878318 has proposed a kind of white light that uses the method for N primary colors (N >=4) colour mixture to obtain different-colour, N kind primary colors comprises the white light and the multiple pure color light near chromatic diagram edge that are positioned at black body-line near zone, the residing position of target color coordinates is in the triangle that above-mentioned white color coordinate and photochromic certain nearest two the photochromic coordinate of pure color of distance objective surround, the coloured light that therefore regulates above-mentioned three chromaticity coordinates just can colour mixture to produce target photochromic. But the method is confined to produce the white light of different-colour, and probably produces look for the white light primary colors of colour mixture and float, can cause colour mixture result to fall flat.
Because existing technology is difficult to meet people in actual applications for the increasingly harsh requirement of illumination, be therefore necessary research and development more perfect, more accurately, the colour mixture technology of easier control.
Summary of the invention
The object of this invention is to provide a kind of full gamut multichannel color mixing method.
The present invention adopts N kind monochromatic light LED to carry out colour mixture mixed light, can reappear more than 90% colour gamut of CIE1931 chromaticity diagram in the time of N >=7, presents 4,800 ten thousand kinds of above colors. It is photochromic that the chromaticity coordinates of the synthetic light of the present invention approaches the Nature, can promotion health the development of illumination and ecological illuminating industry technology, can be widely used in numerous lighting fields such as LED commercial lighting, lighting of home, outdoor scene illumination, will the development of LED lighting engineering be played to very important science and technology support effect.
A kind of full gamut multichannel color mixing method that the present invention proposes, employing comprises N group (N >=5, generally can be 8 >=N >=5,) LED packaging and 1 multi-channel intelligent control system of different dominant wavelengths, utilize four parameter vectors to select required LED drive control channel and provide drive current, make synthetic light can reappear all colours in the shape and color territory, N limit on summit taking N group LED chromaticity coordinates.
N group LED packaging of the present invention has different dominant wavelength, and dominant wavelength is distributed in 380 780nm wave-length coverages; Every group of LED is made up of at least 1 LED chip or module, and every group of LED is equipped with respectively 1 driving control channel corresponding in control system.
Need to show corresponding photochromic of certain chromaticity coordinates time, the present invention adopts the synthetic method of subregion, and the gamut range that N look LED is covered is divided into 2 regions of N and controls colour mixture, thereby reduces the data volume of transmission. Because the coloured light on colour triangle summit just can reappear all chromaticity coordinates of triangle inside, so can choose a some P from N organizes the chromaticity coordinates point of LEDf, be referred to as " fixing point ", from other points, choose successively two consecutive points and PfForm a triangle, be referred to as " subregion triangle ", thereby shape and color territory, N limit is divided into 2 delta-shaped regions of N. The target of required reproduction is photochromic can adopt the photochromic vector of four parameters (Z i ,K 1j ,K 2k, K 3l ) represent, whereinZ i For area code,i=0,1 ... N 2, corresponds respectively to 2 triangle colour gamuts of N,Z i Determine the residing subregion triangle of the photochromic chromaticity coordinates of target;K 1j ,K 2k, K 3l =[0,1] represents that respectively 3 groups of LED corresponding to this colour triangle obtain the logical ratio of the light of this target when photochromic at mixed light. Photochromic vector (Z i ,K 1j ,K 2k, K 3l ) can be mapped to LED current vector (Z i ,I 1j ,I 2k ,I 3l ), whereinI 1j ,I 2k ,I 3l For the drive current of 3 groups of LED packagings corresponding to this colour gamut summit, control system can be passed throughZ i Choose 3 corresponding driving control channels.
Photochromic for given targetP c(x,y), calculateP cWithP fSlope, determine that according to slope size target is photochromicP cThe subregion delta field code at placeZ i ,P cCan form by 3 groups of LED mixed lights corresponding to this triangle. Obtain the logical ratio of mixed light of 3 groups of LED according to photochromic computational methodsK 1j:K 2k:K 3l, and be converted to corresponding LED drive currentI 1j、I 2k、I 3l, obtain LED drive current vector (Z i ,I 1j ,I 2k ,I 3l ). Choose 3 corresponding driving control channels, and export corresponding drive current, 3 groups of LED send corresponding coloured light under the driving of electric current, can obtain target photochromic after mixing.
Compared with existing colour mixture technology, the present invention has following advantage:
The present invention adopts the monochromatic LED of the different dominant wavelengths of N group (N >=5) to carry out mixed light, greatly improve the gamut area that can reappear, in the time of N >=7, can reappear more than 90% colour gamut of CIE1931 chromaticity diagram, realize more colourful color and shown, for sight Lighting Design has been opened up more possibility.
The present invention adopts the synthetic method of colour gamut subregion, utilize the in real time dynamic control algolithm of chromaticity coordinates, the shape and color territory, N limit of N look LED chromaticity coordinates composition is decomposed into 2 triangles of N, with the electric current of four parameter vector control LED packagings, in guaranteeing to reappear on a large scale colour gamut, reduce again the volume of transmitted data of control end.
Brief description of the drawings
Fig. 1 is the gamut map example that full gamut multichannel color mixing method of the present invention can reappear.
Fig. 2 is the colour mixture schematic diagram of full gamut multichannel color mixing method of the present invention.
Fig. 3 is that full gamut multichannel color mixing method of the present invention reappears the photochromic flow chart of certain target.
Number in the figure: Pf,P0?P5The chromaticity coordinates of-7 groups of LED packagings; L1?L5-5 subregion triangles.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described. Described embodiment is only part embodiment of the present invention. Embodiment based in the present invention and do not make other all embodiment of creative achievement, belongs to protection scope of the present invention.
Referring to Fig. 1, an embodiment of full gamut multichannel color mixing method of the present invention, comprising: the LED packaging of 7 groups of different dominant wavelengths, and corresponding to the chromaticity coordinates point P of 7 diverse locations on chromaticity diagramf,P1?P6, all colours in the heptagon colour gamut of this 7 somes composition can obtain by these 7 groups of LED device colour mixtures, and clearly much bigger compared with 3 looks, 4 looks of the reproducible colour gamut of 7 blended-light, can reach the more than 90% of chromaticity diagram. With one of them chromaticity coordinates point PfFor fixing point, other six some P0?P5In get consecutive points and PfForm a triangle, heptagon colour gamut can be divided into altogether to 5 subregion triangle colour gamut L1?L5。
Referring to Fig. 2, any photochromic chromaticity coordinates point in heptagon colour gamut of the present invention can with 1 four parameter vector (Z i ,K 1j ,K 2k, K 3l ) represent, whereinZ i For area code,i=04 corresponds respectively to 5 subregion triangles;K 1j ,K 2k, K 3l =[0,1] represents that respectively 3 groups of LED that this subregion triangle is corresponding obtain the light logical ratio of this target when photochromic in colour mixture. Because the light of LED device is logical relevant to its drive current, therefore can by photochromic vector (Z i ,K 1j ,K 2k, K 3l ) be mapped to LED current vector (Z i ,I 1j ,I 2k ,I 3l ), whereinI 1j ,I 2k ,I 3l For the drive current of 3 groups of LED packagings corresponding to this subregion triangular apex, can pass throughZ i Choose 3 corresponding driving control channels and export.
Referring to Fig. 3, in the time showing that certain target is photochromic, can be according to its chromaticity coordinates Pc(x,y) position, determine the subregion triangle at this photochromic place of target by control system addressing, drive the drive current of controlling LED device corresponding to this triangle colour gamut summit, the light that can regulate these 3 groups of LED to send is separately logical, can arrive required target photochromic after mixed light.
By the chromaticity coordinates of 7 groups of LEDP f(x f,y f)、P 0(x 0,y 0)、P 1(x 1,y 1)、P 2(x 2,y 2)、P 3(x 3,y 3)、P 4(x 4,y 4)、P 5(x 5,y 5), can obtain 5 subregion triangles withP fSlope for two limits on summit:
P f P 0Slope bek 0=(y 0?y f)/(x 0?x f)，
P f P 1Slope bek 1=(y 1?y f)/(x 1?x f)，
P f P 2Slope bek 2=(y 2?y f)/(x 2?x f)，
P f P 3Slope bek 3=(y 3?y f)/(x 3?x f)，
P f P 4Slope bek 4=(y 4?y f)/(x 4?x f)，
P f P 5Slope bek 5=(y 5?y f)/(x 5?x f)。
Photochromic according to targetP cWith fixing pointP fLineP f P cSlopek=(y?y f)/(x?x f), can determinek i+1<k<k i （i=0 4), thus can determine the subregion triangle code at this photochromic place of targetZ i , can be identified for 3 groups of LED chromaticity coordinates point P of colour mixture i 、P i+1And Pf. The flux ratio that these 3 groups of LED mix is:
，
Thereby can obtain corresponding LED drive current vector.
Color mixing method of the present invention, mainly, to increase reproduction colour gamut as target, adopts the LED device of 7 groups of different dominant wavelengths to carry out colour mixture, and the dominant wavelength of respectively organizing LED is distributed in 380 780nm wave-length coverages. This color mixing method can reappear more than 90% colour gamut of CIE1931 chromaticity diagram, has greatly improved the rich of color, can provide more creative plan for sight Lighting Design.
Color mixing method of the present invention, in order to simplify control parameter, adopts the in real time dynamic control algolithm of chromaticity coordinates, utilize 1 four parameter vector to control the driving of 7 groups of LED devices, effectively reduced the volume of transmitted data of control end, thereby accelerated communication speed, reduction is controlled cost.
Claims (1)
1. a full gamut multichannel color mixing method, it is characterized in that concrete steps are: adopt the LED packaging and 1 the multi-channel intelligent control system that comprise N and organize different dominant wavelengths, utilize four parameter vectors to select required LED drive control channel and provide drive current, make the now all colours in the shape and color territory, N limit on summit taking N group LED chromaticity coordinates of synthetic recovery; N >=5; Wherein:
The different dominant wavelength of described N group LED packaging is distributed in 380 780nm wave-length coverages;
Described LED packaging is made up of at least 1 LED chip or module, and every group of LED is equipped with respectively 1 and drives control channel to control;
Need to show corresponding photochromic of certain chromaticity coordinates time, in described summit, choose a some PfAs fixing point, from other points, choose successively two consecutive points and PfForm a triangle, be referred to as " subregion triangle ", thereby shape and color territory, N limit is divided into 2 delta-shaped regions of N;
1 four parameter vector of photochromic employing to any point in described shape and color territory, N limit (Z i ,K 1j ,K 2k, K 3l ) represent, whereinZ i For area code,i=0,1 ... N 2, corresponds respectively to described 2 delta-shaped regions of N,K 1j ,K 2k, K 3l =[0,1] represents that respectively 3 groups of LED corresponding to this colour triangle obtain the logical ratio of the light of target when photochromic at mixed light;
Described photochromic vector (Z i ,K 1j ,K 2k, K 3l ) be mapped to LED current vector (Z i ,I 1j ,I 2k ,I 3l ), whereinI 1j ,I 2k ,I 3l For the drive current of 3 groups of LED packagings corresponding to the photochromic place of described target subregion triangle colour gamut, described control system is passed throughZ i Choose 3 corresponding driving control channels.
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| CN105606218B (en) * | 2016-02-03 | 2017-12-19 | 深圳大学 | The spectroscopy diagnostic method and system of color rendering properties of light source performance |
| CN106068050B (en) * | 2016-08-15 | 2023-08-11 | 复旦大学 | Parameter-settable LED dimming and toning system with feedback function |
| CN106817811B (en) * | 2017-03-30 | 2019-01-01 | 横店集团得邦照明股份有限公司 | The method for realizing full gamut range light distribution based on PWM four primary LED |
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| CN109117492B (en) * | 2018-06-15 | 2023-06-20 | 浙江阳光照明电器集团股份有限公司 | Method for synthesizing full spectrum white light by using multiple trimodal metameric white light spectrums |
| CN108959731A (en) * | 2018-06-15 | 2018-12-07 | 浙江阳光照明电器集团股份有限公司 | The method that two-step method synthesizes N color (7≤N≤9) full spectrum white-light |
| CN109587893B (en) * | 2019-01-08 | 2022-06-03 | 青岛易来智能科技股份有限公司 | Dimming method and device |
| US10874002B2 (en) | 2019-02-01 | 2020-12-22 | Dongguan Star Mount Trading Co., Ltd. | Method and apparatus for computing illumination mixed lights, computer device and storage medium |
| CN111050444B (en) * | 2019-02-01 | 2021-04-09 | 靳鹏 | Method for simulating CIE standard illuminant by using multi-channel LED and illumination system |
| CN109948184B (en) * | 2019-02-01 | 2022-11-08 | 东莞广亮山贸易有限公司 | Illumination mixed light calculation method and device, computer equipment and storage medium |
| CN113205765A (en) * | 2020-12-10 | 2021-08-03 | 深圳市洲明科技股份有限公司 | Display screen color gamut adjusting method and device |
| CN114900925B (en) * | 2022-06-09 | 2023-03-10 | 杭州罗莱迪思科技股份有限公司 | Multi-primary color light control method and application thereof |
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| WO2001095544A2 (en) * | 2000-06-07 | 2001-12-13 | Genoa Color Technologies Ltd. | Device, system and method for electronic true color display |
| CN101161034A (en) * | 2005-04-14 | 2008-04-09 | 皇家飞利浦电子股份有限公司 | Color control of white led lamps |
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| WO2001095544A2 (en) * | 2000-06-07 | 2001-12-13 | Genoa Color Technologies Ltd. | Device, system and method for electronic true color display |
| CN101161034A (en) * | 2005-04-14 | 2008-04-09 | 皇家飞利浦电子股份有限公司 | Color control of white led lamps |
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