CN105101515A - Lamp driving method and device - Google Patents
Lamp driving method and device Download PDFInfo
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- CN105101515A CN105101515A CN201410216391.0A CN201410216391A CN105101515A CN 105101515 A CN105101515 A CN 105101515A CN 201410216391 A CN201410216391 A CN 201410216391A CN 105101515 A CN105101515 A CN 105101515A
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Abstract
The invention discloses a lamp driving method and a lamp driving device. The method comprises obtaining a color coordinate of each channel in multiple single-color channels, wherein a lamp to be driven comprises the multiple single-color channels, and outgoing light of the lamp to be driven is formed by overlapping of single-color light emitted by the single-color channels; obtaining target illuminance of each channel according to a target color coordination of the outgoing light and the color coordinate of each channel; obtaining a drive parameter, corresponding to the target illuminance of each channel, of each channel; and driving each channel by utilizing the obtained drive parameter of each channel. The technical problem of long consumed time of adjustment which is performed on the lamp with the multiple different-color channels by an existing scheme is solved.
Description
Technical field
The present invention relates to field of light fittings, in particular to a kind of driving method and device of light fixture.
Background technology
For the light fixture with multiple different color channels, can by the adjustment to the wherein driving parameter of each passage, realize the adjustment of the photochromic chromaticity coordinates in other words of the emergent light to light fixture entirety, and can, by the accurate control to the driving parameter of each passage, make the chromaticity coordinates of emergent light revert to a certain desired value exactly.
For reaching this purpose, for a solution known for inventor is the mode adopting recurrence, constantly regulate the driving parameter of each passage according to the feedback of the chromaticity coordinates of emergent light, until the chromaticity coordinates of emergent light reaches in the allowed band near a certain target color coordinates.But, adopt and usually need the consumption longer time to wait for finishing of the adjustment process repeated in this way, and under some scenes, the driving parameter drawn by feedback regulation may not be restrained, and also namely may occur that the chromaticity coordinates of emergent light floats round the target color coordinates that needs reach but cannot fall into the situation of above-mentioned allowed band all the time.For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of driving method and device of light fixture, carry out regulating longer technical problem consuming time to the light fixture with multiple different color channels at least to solve existing scheme.
According to an aspect of the embodiment of the present invention, provide a kind of driving method of light fixture, comprise: the chromaticity coordinates obtaining each passage in multiple individual color channel, wherein, light fixture to be driven comprises above-mentioned multiple individual color channel, and the emergent light of above-mentioned light fixture to be driven is the monochromatic superposition that above-mentioned multiple individual color channel sends separately; The object illumination of above-mentioned each passage is obtained according to the target color coordinates of above-mentioned emergent light and the chromaticity coordinates of above-mentioned each passage; Obtain the driving parameter of the above-mentioned each passage corresponding with the object illumination of above-mentioned each passage; The driving parameter of the above-mentioned each passage obtained is used to drive above-mentioned each passage.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of drive unit of light fixture, comprise: the first acquiring unit, for obtaining the chromaticity coordinates of each passage in multiple individual color channel, wherein, light fixture to be driven comprises above-mentioned multiple individual color channel, and the emergent light of above-mentioned light fixture to be driven is the monochromatic superposition that above-mentioned multiple individual color channel sends separately; Second acquisition unit, for obtaining the object illumination of above-mentioned each passage according to the target color coordinates of above-mentioned emergent light and the chromaticity coordinates of above-mentioned each passage; 3rd acquiring unit, for obtaining the driving parameter of the above-mentioned each passage corresponding with the object illumination of above-mentioned each passage; First driver element, drives above-mentioned each passage for using the driving parameter of above-mentioned each passage of acquisition.
In embodiments of the present invention, first record the chromaticity coordinates of each individual color channel in light fixture, then colorimetry principle is utilized to calculate object illumination for making the emergent light of light fixture entirety reach each passage needed for target color coordinates, recycling is driving model that each individual color channel is set up in advance, also the corresponding relation namely between the driving parameter of each passage and object illumination matches the driving parameter needed for each passage, and then these can be used to drive parameter to drive each passage respectively, with the driving of complete lamps constituting a pair, and make the emergent light of light fixture entirety reach target color coordinates.In embodiments of the present invention, the control of based target chromaticity coordinates to each passage and driving parameter thereof is open loop, thus eliminate the process of feedback regulation, this just can accelerate governing speed and improve regulate efficiency, and then solve existing scheme to the light fixture with multiple different color channels carry out regulate longer technical problem consuming time.
Further, in embodiments of the present invention, the demarcation of the complete lamps constituting a pair of similar mode can also be utilized, also namely by target setting chromaticity coordinates and by the driving reference record that obtains based on this target color coordinates to the mode in tables of data, before light fixture dispatches from the factory, calibrate target color coordinates and drive the mapping relations between parameter, and can be stored in the controller of light fixture by recording the tables of data obtained, so that the tables of data quick search prestored can be utilized to obtain the driving parameter of each passage matched with the target color coordinates reached needed for it in the process that uses in reality of light fixture, thus reach the effect accelerated further the governing speed that the emergent light of light fixture regulates, and reduce the requirement of the computing capability of the controller to light fixture.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the driving method of a kind of optional light fixture according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of a kind of optional color space according to the embodiment of the present invention and chromaticity coordinates;
Fig. 3 is the schematic diagram according to the fitting result between the driving parameter of a kind of optional individual color channel of the embodiment of the present invention and object illumination;
Fig. 4 is the schematic diagram according to the fitting result between the driving parameter of the optional individual color channel of the another kind of the embodiment of the present invention and object illumination;
Fig. 5 is the schematic diagram of the drive unit of a kind of optional light fixture according to the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Embodiment 1
According to the embodiment of the present invention, provide a kind of driving method of light fixture, as shown in Figure 1, the method comprises:
S102: the chromaticity coordinates obtaining each passage in multiple individual color channel, wherein, light fixture to be driven comprises multiple individual color channel, and the monochromatic superposition that the emergent light of light fixture to be driven is multiple individual color channel to be sent separately;
S104: the object illumination obtaining each passage according to the target color coordinates of emergent light and the chromaticity coordinates of each passage;
S106: the driving parameter obtaining each passage corresponding with the object illumination of each passage;
S108: use the driving parameter of each passage obtained to drive each passage.
Will be clear that, one of embodiment of the present invention problem to be solved is to provide a kind of method, so that by the driving to each passage included in the light fixture of multiple individual color channel, the adjustment of the photochromic chromaticity coordinates in other words of the emergent light that the entirety realizing this light fixture to be driven sends, and can, by the accurate control to the driving parameter of each passage, make the chromaticity coordinates of this emergent light revert to a certain desired value exactly.
For reaching this purpose, for a solution known for inventor is the mode adopting recurrence, constantly regulate the driving parameter of each passage according to the feedback of the chromaticity coordinates of emergent light, until the chromaticity coordinates of emergent light reaches in the allowed band near a certain target color coordinates.But, adopt and usually need the consumption longer time to wait for finishing of the adjustment process repeated in this way, and under some scenes, the driving parameter drawn by feedback regulation may not be restrained, and also namely may occur that the chromaticity coordinates of emergent light floats round the target color coordinates that needs reach but cannot fall into the situation of above-mentioned allowed band all the time.
For solving the problem, in embodiments of the present invention, first record the chromaticity coordinates of each individual color channel in light fixture, then colorimetry principle is utilized to calculate object illumination for making the emergent light of light fixture entirety reach each passage needed for target color coordinates, recycling is driving model that each individual color channel is set up in advance, also the corresponding relation namely between the driving parameter of each passage and object illumination matches the driving parameter needed for each passage, and then these can be used to drive parameter to drive each passage respectively, with the driving of complete lamps constituting a pair, and make the emergent light of light fixture entirety reach target color coordinates.In embodiments of the present invention, the control of based target chromaticity coordinates to each passage and driving parameter thereof is open loop, thus eliminate the process of feedback regulation, this just can accelerate governing speed and improve regulate efficiency, and then solve existing scheme to the light fixture with multiple different color channels carry out regulate longer problem consuming time.
Further, in embodiments of the present invention, the demarcation of the complete lamps constituting a pair of similar mode can also be utilized, also namely by target setting chromaticity coordinates and by the driving reference record that obtains based on this target color coordinates to the mode in tables of data, before light fixture dispatches from the factory, calibrate target color coordinates and drive the mapping relations between parameter, and can be stored in the controller of light fixture by recording the tables of data obtained, so that the tables of data quick search prestored can be utilized to obtain the driving parameter of each passage matched with the target color coordinates reached needed for it in the process that uses in reality of light fixture, thus reach the effect accelerated further the governing speed that the emergent light of light fixture regulates, and reduce the requirement of the computing capability of the controller to light fixture.
Below with reference to accompanying drawing and specific embodiment, technical solution of the present invention is made a more detailed description.
As shown in Figure 1, according to the driving method of the light fixture that the embodiment of the present invention provides, in step s 102, the chromaticity coordinates of each passage in multiple individual color channel can be obtained, wherein, light fixture to be driven comprises the plurality of individual color channel, and the emergent light of light fixture to be driven comprises the monochromatic superposition that the plurality of individual color channel sends separately.
Usually, the vision system of human eye have for short (420-440nm), in the photoreceptor of (530-540nm) and long (560-580nm) three wave bands and cone cell, therefore, for a certain light fixture, the color that its emergent light is recognized by the human eye can describe based on to the stimulation ratio of three kinds of cone cells.Specifically, first can define three kinds of main colors, recycling color addition model regulates three kinds of color outputs separately, just can show shades of colour by the superposition of three kinds of colors.Utilize above-mentioned principle, there is the light fixture of multiple individual color channel integrally, photochromic outside the color that just can show individual color channel itself by the superposition of the light of multiple passage, such as, the plurality of individual color channel can comprise: red channel, green channel and blue channel, but the present invention is not construed as limiting this, utilize the combination of the plural individual color channel of other colors all can reach and be combined into different photochromic effect, this does not affect the enforcement of technical solution of the present invention and the realization of technique effect thereof, similar execution mode all should be considered as within protection scope of the present invention.
More specifically, in embodiments of the present invention, the color of the mode of chromaticity coordinates to the emergent light of light fixture and each individual color channel thereof can be adopted to be described, and in other words, chromaticity coordinates is with the expression of the form of parameter value to a certain color.Usually, this chromaticity coordinates can be positioned at color space, and its coordinate figure may be used for the stimulation degree of the different cone cells describing certain Color pair human eye usually, tristimulus values in other words.Such as, for CIE1931 color space known to those skilled in the art, its three kinds of main colors defined are similar to redness, green and blue, and then other colors a certain can be expressed as the combination of these three kinds of colors to reach the identical effect of stimulation to human eye, wherein, three kinds of colors component separately just can as coordinate figure X, Y and the Z in this color space.
In embodiments of the present invention, first can be recorded the chromaticity coordinates of each passage in the multiple individual color channel in light fixture by step S102, particularly, this chromaticity coordinates can use colorimeter to measure.Such as, Fig. 2 shows the measurement result of the chromaticity coordinates of each passage in a kind of light fixture optionally comprising red, green and blue totally three individual color channel.Particularly, x-y coordinate system shown in Fig. 2 can represent the coordinate system at color space place, wherein abscissa x can represent a kind of accounting in three kinds of colors, ordinate y can represent alternative accounting, then the accounting of remaining a kind of color can be represented by (1-x-y).The region 202 identified by dotted line in Fig. 2 can represent the colour gamut of CIE1931, and this colour gamut 202 can be considered as being the set of the color that can be recognized by the human eye, and each coordinate points in colour gamut 202 all can express a kind of color.The region 204 identified by solid line in Fig. 2 can represent the adjustable colour gamut of this light fixture, also namely by the set to the color of the emergent light of the light fixture entirety that the adjustment of the driving parameter of each passage in the individual color channel of three included by light fixture can be combined into, particularly, three summit Pr of this colour gamut 204, Pg, Pb represents three individual color channel chromaticity coordinates point separately respectively, wherein, Pr can be the chromaticity coordinates point of the red channel measured by colorimeter, Pg can be the chromaticity coordinates point of the green channel measured by colorimeter, Pb can be the chromaticity coordinates point of the blue channel measured by colorimeter.Under above-mentioned scene, by the adjustment of the driving parameter to three individual color channel, just can within superpose out any one color being positioned at above-mentioned adjustable colour gamut 204, such as, by the white etc. represented by chromaticity coordinates point Pw in Fig. 2.
On this basis, according to the driving method that the embodiment of the present invention provides, in step S104, the object illumination of each passage can be obtained according to the chromaticity coordinates of the target color coordinates of the emergent light of light fixture and each passage.
Particularly, in embodiments of the present invention, the each self-corresponding illumination of each passage in multiple individual color channel just can represent the light output ratio of each passage, and then by the superposition of the output light of each individual color channel under different proportion, the chromaticity coordinates of the required color emergent light of light fixture in other words just can be combined into.More specifically, as the optional mode of one, in embodiments of the present invention, above-mentioned steps S104 can comprise:
S2: the colour mixture region that to generate with the chromaticity coordinates of described each passage in default chromaticity coordinates space be summit;
S4: if described target color coordinates is positioned at described colour mixture region, then according to described target color coordinates relative to described each passage chromaticity coordinates between relative position relation obtain the illumination ratio of described each passage;
S6: using the object illumination of the product of the illumination ratio of the illumination summation of described emergent light and described each passage as described each passage.
Further, according to the driving method that the embodiment of the present invention provides, in step s 106, the driving parameter of each passage corresponding with the object illumination of each passage can be obtained, and then can step S108 be passed through, use the driving parameter of each passage obtained to drive each passage.
Particularly, in embodiments of the present invention, this driving parameter can represent for driving each passage in light fixture and playing the physical parameter of the regulating action of the illumination to each passage, such as, in some embodiments of the invention, this driving parameter can be the voltage magnitude of the voltage signal as analog quantity, and in further embodiments, this driving parameter also can be the duty ratio etc. of pulse-width modulation PWM (PulseWidthModulation) signal as digital quantity, wherein, this driving parameter usually can be corresponding with the output of the drive circuit of light fixture, but the present invention is not limited in any way this.
On the other hand, in embodiments of the present invention, this driving parameter can obtain based on the driving model of each individual color channel set up in advance.Such as, as the optional mode of one, in embodiments of the present invention, above-mentioned steps S106 can comprise:
S8: process of fitting treatment is carried out to the multiple driving parameter sampling value corresponding with each passage obtained in advance and multiple illumination sampled value, wherein, multiple driving parameter sampling value and multiple illumination sampled value one_to_one corresponding;
S10: obtain the corresponding relation between the driving parameter corresponding with each passage and object illumination according to the result of process of fitting treatment;
S12: the driving parameter obtaining each passage corresponding with the object illumination of each passage according to this corresponding relation.
In embodiments of the present invention, for each passage in light fixture, all can first drive parameter sampling value and illumination sampled value to carry out matching to many groups that record in advance, then judge the corresponding relation between the driving parameter of this individual color channel and object illumination according to the result of matching.The most simply, for the light fixture that the linearity driven between parameter and illumination is higher, as Light-Emitting Diode LED (LightEmittingDiode) light fixture utilizing the voltage signal of below certain voltage threshold value or the pwm signal below certain frequency threshold value to control, above-mentioned process of fitting treatment can adopt the mode of linear fit.But this execution mode that also non-invention is unique, such as, for the light fixture that the linearity is poor, then also can adopt the corresponding relation between other fit approach more complicated driving parameter of acquisition and object illumination, the present invention is not construed as limiting this.
Such as, as wherein a kind of optional mode, in embodiments of the present invention, above-mentioned steps S8 specifically can comprise:
S14: linear fit is carried out to multiple driving parameter sampling value and multiple illumination sampled value; Wherein,
Above-mentioned steps S10 specifically can comprise:
S15: the result according to linear fit obtains corresponding relation: E=p*c+E
0, wherein, E represents the object illumination of each passage, and c represents the driving parameter of each passage, p and E
0for constant coefficient; Wherein,
Above-mentioned steps S12 specifically can comprise:
S16: the driving parameter obtaining each passage according to following calculating formula: c=(E-E
0)/p.
For the fitting result shown in Fig. 3.In figure 3, solid black round dot can represent sampled point, the abscissa value of this sampled point can represent driving parameter sampling value, the value of the multiple PWM duty ratios also namely preset, the ordinate value of this sampled point can represent illumination sampled value, the brightness value of each the lower measured individual color channel also namely in the plurality of PWM duty ratio.As can be seen from Figure 3, concerning should individual color channel, it drives the linearity between parameter and illumination better, and the process of fitting treatment mode of linear fit therefore can be adopted to carry out matching to it, and fitting result can be the straight line 302 shown in Fig. 3.Under above-mentioned scene, constant coefficient p can be the slope of straight line 302, constant coefficient E
0namely can be approximated to be zero, is also proportionate relationship as the duty ratio of driving parameter and object illumination substantially.
In addition, as the optional mode of another kind, in embodiments of the present invention, above-mentioned steps S8 can comprise:
S17: adopt interpolation method to carry out process of fitting treatment to multiple driving parameter sampling value and multiple illumination sampled value; Wherein,
Above-mentioned steps S10 specifically can comprise:
S18: the result according to process of fitting treatment obtains corresponding relation: E=(E
2-E
1) * (c-c
1)/(c
2-c
1)+E
1, wherein, E represents the object illumination of each passage, and c represents the driving parameter of each passage, c
1represent in multiple driving parameter sampling value and c
1<c, c
2represent in multiple driving parameter sampling value and c
2>c, E
1represent in multiple illumination sampled value with c
1corresponding one, E
2represent in multiple illumination sampled value with c
2corresponding one; Wherein,
Above-mentioned steps S12 specifically can comprise:
S19: the driving parameter obtaining each passage according to following calculating formula: c=(c
2-c
1) * (E-E
1)/(E
2-E
1)+c
1.
For the fitting result shown in Fig. 4.In the diagram, solid black round dot can represent sampled point, the abscissa value of this sampled point can represent driving parameter sampling value, the value of the multiple PWM duty ratios also namely preset, the ordinate value of this sampled point can represent illumination sampled value, the brightness value of each the lower measured individual color channel also namely in the plurality of PWM duty ratio.Be different from the processing mode of aforementioned linear matching, in embodiments of the present invention, the processing mode that have employed interpolation method has carried out process of fitting treatment to multiple sampled point, particularly, the processing mode of this interpolation method can be considered as being use the broken line connecting multiple sampled point to represent the corresponding relation between the driving parameter of each passage and object illumination, also be, in interval between adjacent two sampled points, this corresponding relation can be represented by the line segment be connected between these two adjacent sampled points.
Under above-mentioned scene, by the broken line 402 that the result of the process of fitting treatment performed by step S17 can be the multiple sampled point of connection in Fig. 4, and then the corresponding relation between the driving parameter of the individual color channel corresponding with this group sampled point and object illumination just can be represented by this broken line 402.Such as, for two sampled point (c adjacent in Fig. 4
1, E
1) and (c
2, E
2) between interval, the object illumination E corresponding to arbitrary driving parameter c can be expressed as:
E＝(E
2-E
1)*(c-c
1)/(c
2-c
1)+E
1，
Accordingly, then to reach object illumination E, then required driving parameter c can be expressed as:
c＝(c
2-c
1)*(E-E
1)/(E
2-E
1)+c
1。
The concrete execution mode of two kinds of process of fitting treatment described in step S8 is provided by above-mentioned two examples, but should be understood that, the concrete process of fitting treatment mode adopted in the embodiment of the present invention is not limited to above-mentioned two kinds, such as, the non-linear curve fitting process that other are more complicated can also be adopted, as cubic spline interpolation etc., in addition, in some embodiments of the invention, also other processing modes of neural net or function approximation can be adopted to realize, etc., the present invention is not limited in any way this.
On the other hand, known from the above description, as the optional mode of one, before step S8, said method can also comprise:
S20: choose the multiple driving parameter sampling values corresponding with each passage;
S22: use each driving parameter sampling value in multiple driving parameter sampling value to drive each passage;
S24: when using each driving parameter sampling value to drive each passage, obtain the current illumination of each passage as the illumination sampled value corresponding with each driving parameter sampling value.
On this basis, further alternatively, in embodiments of the present invention, above-mentioned steps S102 can comprise:
S26: when using each driving parameter sampling value to drive each passage, obtain the current color coordinate of each passage;
S28: using the mean value of multiple current color coordinates that obtains under the multiple driving parameter sampling value chromaticity coordinates as each passage.
Also be, in embodiments of the present invention, can while driving parameter be scanned to demarcate the corresponding relation between the driving parameter of individual color channel and object illumination, the chromaticity coordinates of the individual color channel under each driving parameter sampling value is measured, and then can using the mean value of multiple chromaticity coordinatess that the records chromaticity coordinates as this individual color channel described in step S102.By this mode, can eliminate further and come from the inside of colorimeter or the disturbing factor of outside, as the inaccurate impact of measurement etc. that temperature is brought colorimeter, thus realize carrying out more adequately drived control to the chromaticity coordinates of the emergent light of light fixture.
On basis described above, in some embodiments of the invention, the demarcation of the complete lamps constituting a pair of similar mode can also be utilized.Wherein, as the optional mode of one, in embodiments of the present invention, above-mentioned steps S104 can comprise:
S30: choose multiple target color coordinates;
S32: the object illumination obtaining each passage corresponding with each according to each in multiple target color coordinates and the chromaticity coordinates of each passage; Wherein,
Above-mentioned steps S106 can comprise:
S34: each lower driving parameter obtaining each passage as with each passage and each all corresponding driving parameter, and by the driving reference record of the equal correspondence of acquisition in tables of data; Wherein,
Above-mentioned steps S108 can comprise:
S36: judge the target color coordinates that the current needs of emergent light reach;
S38: search the driving parameter all corresponding with the target color coordinates that each passage and needs reach in tables of data;
S40: use the driving parameter found to drive each passage.
In other words, in embodiments of the present invention, can by target setting chromaticity coordinates and by the driving reference record that obtains based on this target color coordinates to the mode in tables of data, before light fixture dispatches from the factory, calibrate target color coordinates and drive the mapping relations between parameter, and can be stored in the controller of light fixture by recording the tables of data obtained, so that the tables of data quick search prestored can be utilized to obtain the driving parameter of each passage matched with the target color coordinates reached needed for it in the process that uses in reality of light fixture, thus reach the effect accelerated further the governing speed that the emergent light of light fixture regulates, and reduce the requirement of the computing capability of the controller to light fixture.
By the way, set forth, but should be understood that technical solution of the present invention and operation principle thereof, above-described embodiment is only for the understanding of the present invention, and should not be considered as is limitation of the invention.Such as, with red in previous embodiment, green and blue three individual color channel are the coupling that example describes the illumination of each passage, but in other embodiments of the present invention, it is three primary colors that the color of this individual color channel is not limited in, for other individual color channel, still can by determine with its chromaticity coordinates adjustable colour gamut that is summit and the mode of combining target chromaticity coordinates obtains the object illumination of each passage, in fact, even if for the light fixture only with two individual color channel, still can by driving the adjustment of parameter to obtain in chromaticity coordinates space to it to be positioned at the shades of colour on the chromaticity coordinates of these two individual color channel line segment that is summit.
Embodiment 2
According to the embodiment of the present invention, additionally provide a kind of drive unit of the driving method for implementing above-mentioned light fixture, as shown in Figure 5, this device comprises:
1) the first acquiring unit 502, for obtaining the chromaticity coordinates of each passage in multiple individual color channel, wherein, light fixture to be driven comprises the plurality of individual color channel, and the monochromatic superposition that the emergent light of light fixture to be driven is the plurality of individual color channel to be sent separately;
2) second acquisition unit 504, for obtaining the object illumination of each passage according to the target color coordinates of emergent light and the chromaticity coordinates of each passage;
3) the 3rd acquiring unit 506, for obtaining the driving parameter of each passage corresponding with the object illumination of each passage;
4) the first driver element 508, the driving parameter for each passage using acquisition drives each passage.
Will be clear that, one of embodiment of the present invention problem to be solved is to provide a kind of device, so that by the driving to each passage included in the light fixture of multiple individual color channel, the adjustment of the photochromic chromaticity coordinates in other words of the emergent light that the entirety realizing this light fixture to be driven sends, and can, by the accurate control to the driving parameter of each passage, make the chromaticity coordinates of this emergent light revert to a certain desired value exactly.
For reaching this purpose, for a solution known for inventor is the mode adopting recurrence, constantly regulate the driving parameter of each passage according to the feedback of the chromaticity coordinates of emergent light, until the chromaticity coordinates of emergent light reaches in the allowed band near a certain target color coordinates.But, adopt and usually need the consumption longer time to wait for finishing of the adjustment process repeated in this way, and under some scenes, the driving parameter drawn by feedback regulation may not be restrained, and also namely may occur that the chromaticity coordinates of emergent light floats round the target color coordinates that needs reach but cannot fall into the situation of above-mentioned allowed band all the time.
For solving the problem, in embodiments of the present invention, first record the chromaticity coordinates of each individual color channel in light fixture, then colorimetry principle is utilized to calculate object illumination for making the emergent light of light fixture entirety reach each passage needed for target color coordinates, recycling is driving model that each individual color channel is set up in advance, also the corresponding relation namely between the driving parameter of each passage and object illumination matches the driving parameter needed for each passage, and then these can be used to drive parameter to drive each passage respectively, with the driving of complete lamps constituting a pair, and make the emergent light of light fixture entirety reach target color coordinates.In embodiments of the present invention, the control of based target chromaticity coordinates to each passage and driving parameter thereof is open loop, thus eliminate the process of feedback regulation, this just can accelerate governing speed and improve regulate efficiency, and then solve existing scheme to the light fixture with multiple different color channels carry out regulate longer problem consuming time.
Further, in embodiments of the present invention, the demarcation of the complete lamps constituting a pair of similar mode can also be utilized, also namely by target setting chromaticity coordinates and by the driving reference record that obtains based on this target color coordinates to the mode in tables of data, before light fixture dispatches from the factory, calibrate target color coordinates and drive the mapping relations between parameter, and can be stored in the controller of light fixture by recording the tables of data obtained, so that the tables of data quick search prestored can be utilized to obtain the driving parameter of each passage matched with the target color coordinates reached needed for it in the process that uses in reality of light fixture, thus reach the effect accelerated further the governing speed that the emergent light of light fixture regulates, and reduce the requirement of the computing capability of the controller to light fixture.
Below with reference to accompanying drawing and specific embodiment, technical solution of the present invention is made a more detailed description.
As shown in Figure 5, according to the drive unit of the light fixture that the embodiment of the present invention provides, by the first acquiring unit 502, the chromaticity coordinates of each passage in multiple individual color channel can be obtained, wherein, light fixture to be driven comprises the plurality of individual color channel, and the emergent light of light fixture to be driven comprises the monochromatic superposition that the plurality of individual color channel sends separately.
Usually, the vision system of human eye have for short (420-440nm), in the photoreceptor of (530-540nm) and long (560-580nm) three wave bands and cone cell, therefore, for a certain light fixture, the color that its emergent light is recognized by the human eye can describe based on to the stimulation ratio of three kinds of cone cells.Specifically, first can define three kinds of main colors, recycling color addition model regulates three kinds of color outputs separately, just can show shades of colour by the superposition of three kinds of colors.Utilize above-mentioned principle, there is the light fixture of multiple individual color channel integrally, photochromic outside the color that just can show individual color channel itself by the superposition of the light of multiple passage, such as, the plurality of individual color channel can comprise: red channel, green channel and blue channel, but the present invention is not construed as limiting this, utilize the combination of the plural individual color channel of other colors all can reach and be combined into different photochromic effect, this does not affect the enforcement of technical solution of the present invention and the realization of technique effect thereof, similar execution mode all should be considered as within protection scope of the present invention.
More specifically, in embodiments of the present invention, the color of the mode of chromaticity coordinates to the emergent light of light fixture and each individual color channel thereof can be adopted to be described, and in other words, chromaticity coordinates is with the expression of the form of parameter value to a certain color.Usually, this chromaticity coordinates can be positioned at color space, and its coordinate figure may be used for the stimulation degree of the different cone cells describing certain Color pair human eye usually, tristimulus values in other words.Such as, for CIE1931 color space known to those skilled in the art, its three kinds of main colors defined are similar to redness, green and blue, and then other colors a certain can be expressed as the combination of these three kinds of colors to reach the identical effect of stimulation to human eye, wherein, three kinds of colors component separately just can as coordinate figure X, Y and the Z in this color space.
In embodiments of the present invention, first can be recorded the chromaticity coordinates of each passage in the multiple individual color channel in light fixture by the first acquiring unit 502, particularly, this chromaticity coordinates can use colorimeter to measure.Such as, Fig. 2 shows the measurement result of the chromaticity coordinates of each passage in a kind of light fixture optionally comprising red, green and blue totally three individual color channel.Particularly, x-y coordinate system shown in Fig. 2 can represent the coordinate system at color space place, wherein abscissa x can represent a kind of accounting in three kinds of colors, ordinate y can represent alternative accounting, then the accounting of remaining a kind of color can be represented by (1-x-y).The region 202 identified by dotted line in Fig. 2 can represent the colour gamut of CIE1931, and this colour gamut 202 can be considered as being the set of the color that can be recognized by the human eye, and each coordinate points in colour gamut 202 all can express a kind of color.The region 204 identified by solid line in Fig. 2 can represent the adjustable colour gamut of this light fixture, also namely by the set to the color of the emergent light of the light fixture entirety that the adjustment of the driving parameter of each passage in the individual color channel of three included by light fixture can be combined into, particularly, three summit Pr of this colour gamut 204, Pg, Pb represents three individual color channel chromaticity coordinates point separately respectively, wherein, Pr can be the chromaticity coordinates point of the red channel measured by colorimeter, Pg can be the chromaticity coordinates point of the green channel measured by colorimeter, Pb can be the chromaticity coordinates point of the blue channel measured by colorimeter.Under above-mentioned scene, by the adjustment of the driving parameter to three individual color channel, just can within superpose out any one color being positioned at above-mentioned adjustable colour gamut 204, such as, by the white etc. represented by chromaticity coordinates point Pw in Fig. 2.
On this basis, according to the drive unit that the embodiment of the present invention provides, by second acquisition unit 504, the object illumination of each passage can be obtained according to the chromaticity coordinates of the target color coordinates of the emergent light of light fixture and each passage.
Particularly, in embodiments of the present invention, the each self-corresponding illumination of each passage in multiple individual color channel just can represent the light output ratio of each passage, and then by the superposition of the output light of each individual color channel under different proportion, the chromaticity coordinates of the required color emergent light of light fixture in other words just can be combined into.More specifically, as the optional mode of one, in embodiments of the present invention, above-mentioned second acquisition unit 504 can comprise:
1) generation module, for the colour mixture region that to generate with the chromaticity coordinates of each passage in default chromaticity coordinates space be summit;
2) the 4th acquisition module, during for being positioned at colour mixture region in target color coordinates, according to target color coordinates relative to each passage chromaticity coordinates between relative position relation obtain the illumination ratio of each passage;
3) the second processing module, for using the object illumination of the product of the illumination summation of emergent light and the illumination ratio of each passage as each passage.
Further, according to the drive unit that the embodiment of the present invention provides, by the 3rd acquiring unit 506, the driving parameter of each passage corresponding with the object illumination of each passage can be obtained, and then can the first driver element 508 be passed through, use the driving parameter of each passage obtained to drive each passage.
Particularly, in embodiments of the present invention, this driving parameter can represent for driving each passage in light fixture and playing the physical parameter of the regulating action of the illumination to each passage, such as, in some embodiments of the invention, this driving parameter can be the voltage magnitude of the voltage signal as analog quantity, and in further embodiments, this driving parameter also can be the duty ratio etc. of the pwm signal as digital quantity, wherein, this driving parameter usually can be corresponding with the output of the drive circuit of light fixture, but the present invention is not limited in any way this.
On the other hand, in embodiments of the present invention, this driving parameter can obtain based on the driving model of each individual color channel set up in advance.Such as, as the optional mode of one, in embodiments of the present invention, above-mentioned 3rd acquiring unit 506 can comprise:
1) fitting module, for carrying out process of fitting treatment to multiple driving parameter sampling value corresponding with each passage obtained in advance and multiple illumination sampled value, wherein, multiple driving parameter sampling value and multiple illumination sampled value one_to_one corresponding;
2) the first acquisition module, for obtaining the corresponding relation between the driving parameter corresponding with each passage and object illumination according to the result of process of fitting treatment;
3) the second acquisition module, for obtaining the driving parameter of each passage corresponding with the object illumination of each passage according to corresponding relation.
In embodiments of the present invention, for each passage in light fixture, all can first drive parameter sampling value and illumination sampled value to carry out matching to many groups that record in advance, then judge the corresponding relation between the driving parameter of this individual color channel and object illumination according to the result of matching.The most simply, for the light fixture that the linearity driven between parameter and illumination is higher, as the LED lamp utilizing the voltage signal of below certain voltage threshold value or the pwm signal below certain frequency threshold value to control, above-mentioned process of fitting treatment can adopt the mode of linear fit.But this execution mode that also non-invention is unique, such as, for the light fixture that the linearity is poor, then also can adopt the corresponding relation between other fit approach more complicated driving parameter of acquisition and object illumination, the present invention is not construed as limiting this.
Such as, as wherein a kind of optional mode, in embodiments of the present invention, above-mentioned fitting module specifically can comprise:
1) the first matching submodule, for carrying out linear fit to multiple driving parameter sampling value and multiple illumination sampled value; Wherein,
Above-mentioned first acquisition module specifically can comprise:
2) the first process submodule, obtains corresponding relation: E=p*c+E for the result according to linear fit
0, wherein, E represents the object illumination of each passage, and c represents the driving parameter of each passage, p and E0 is constant coefficient; Wherein,
Above-mentioned second acquisition module specifically can comprise:
3) the second process submodule, for obtaining the driving parameter of each passage: c=(E-E according to following calculating formula
0)/p.
For the fitting result shown in Fig. 3.In figure 3, solid black round dot can represent sampled point, the abscissa value of this sampled point can represent driving parameter sampling value, the value of the multiple PWM duty ratios also namely preset, the ordinate value of this sampled point can represent illumination sampled value, the brightness value of each the lower measured individual color channel also namely in the plurality of PWM duty ratio.As can be seen from Figure 3, concerning should individual color channel, it drives the linearity between parameter and illumination better, and the process of fitting treatment mode of linear fit therefore can be adopted to carry out matching to it, and fitting result can be the straight line 302 shown in Fig. 3.Under above-mentioned scene, constant coefficient p can be the slope of straight line 302, constant coefficient E
0namely can be approximated to be zero, is also proportionate relationship as the duty ratio of driving parameter and object illumination substantially.
In addition, as the optional mode of another kind, in embodiments of the present invention, above-mentioned fitting module can comprise:
1) the second matching submodule, carries out process of fitting treatment for adopting interpolation method to multiple driving parameter sampling value and multiple illumination sampled value; Wherein,
Above-mentioned first acquisition module specifically can comprise:
1) the 3rd process submodule, obtains corresponding relation for the result according to process of fitting treatment: E=(E
2-E
1) * (c-c
1)/(c
2-c
1)+E
1, wherein, E represents the object illumination of each passage, and c represents the driving parameter of each passage, c
1represent in multiple driving parameter sampling value and c
1<c, c
2represent in multiple driving parameter sampling value and c
2>c, E
1represent in multiple illumination sampled value with c
1corresponding one, E
2represent in multiple illumination sampled value with c
2corresponding one; Wherein,
Above-mentioned second acquisition module specifically can comprise:
1) the 4th process submodule, for obtaining the driving parameter of each passage according to following calculating formula:
c＝(c
2-c
1)*(E-E
1)/(E
2-E
1)+c
1。
For the fitting result shown in Fig. 4.In the diagram, solid black round dot can represent sampled point, the abscissa value of this sampled point can represent driving parameter sampling value, the value of the multiple PWM duty ratios also namely preset, the ordinate value of this sampled point can represent illumination sampled value, the brightness value of each the lower measured individual color channel also namely in the plurality of PWM duty ratio.Be different from the processing mode of aforementioned linear matching, in embodiments of the present invention, the processing mode that have employed interpolation method has carried out process of fitting treatment to multiple sampled point, particularly, the processing mode of this interpolation method can be considered as being use the broken line connecting multiple sampled point to represent the corresponding relation between the driving parameter of each passage and object illumination, also be, in interval between adjacent two sampled points, this corresponding relation can be represented by the line segment be connected between these two adjacent sampled points.
Under above-mentioned scene, by the broken line 402 that the result of the process of fitting treatment performed by the second matching submodule can be the multiple sampled point of connection in Fig. 4, and then the corresponding relation between the driving parameter of the individual color channel corresponding with this group sampled point and object illumination just can be represented by this broken line 402.Such as, for two sampled point (c adjacent in Fig. 4
1, E
1) and (c
2, E
2) between interval, the object illumination E corresponding to arbitrary driving parameter c can be expressed as:
E＝(E
2-E
1)*(c-c
1)/(c
2-c
1)+E
1，
Accordingly, then to reach object illumination E, then required driving parameter c can be expressed as:
c＝(c
2-c
1)*(E-E
1)/(E
2-E
1)+c
1。
The concrete execution mode of two kinds of process of fitting treatment described in above-mentioned fitting module is provided by above-mentioned two examples, but should be understood that, the concrete process of fitting treatment mode adopted in the embodiment of the present invention is not limited to above-mentioned two kinds, such as, the non-linear curve fitting process that other are more complicated can also be adopted, as cubic spline interpolation etc., in addition, in some embodiments of the invention, also other processing modes of neural net or function approximation can be adopted to realize, etc., the present invention is not limited in any way this.
On the other hand, known from the above description, as the optional mode of one, be coupled with fitting module ground, and said apparatus can also comprise:
1) unit is chosen, for choosing the multiple driving parameter sampling values corresponding with each passage;
2) the second driver element, drives each passage for using each driving parameter sampling value in multiple driving parameter sampling value;
3) the 4th acquiring unit, for when using each driving parameter sampling value to drive each passage, obtains the current illumination of each passage as the illumination sampled value corresponding with each driving parameter sampling value.
On this basis, further alternatively, in embodiments of the present invention, above-mentioned first acquiring unit 502 can comprise:
1) the 3rd acquisition module, for when using each driving parameter sampling value to drive each passage, obtains the current color coordinate of each passage;
2) the first processing module, for the mean value of multiple current color coordinates that will obtain under the multiple driving parameter sampling value chromaticity coordinates as each passage.
Also be, in embodiments of the present invention, can while driving parameter be scanned to demarcate the corresponding relation between the driving parameter of individual color channel and object illumination, the chromaticity coordinates of the individual color channel under each driving parameter sampling value is measured, and then can using the mean value of multiple chromaticity coordinatess that the records chromaticity coordinates as this individual color channel described in the first acquiring unit 502.By this mode, can eliminate further and come from the inside of colorimeter or the disturbing factor of outside, as the inaccurate impact of measurement etc. that temperature is brought colorimeter, thus realize carrying out more adequately drived control to the chromaticity coordinates of the emergent light of light fixture.
On basis described above, in some embodiments of the invention, the demarcation of the complete lamps constituting a pair of similar mode can also be utilized.Wherein, as the optional mode of one, in embodiments of the present invention, above-mentioned second acquisition unit 504 can comprise:
1) module is chosen, for choosing multiple target color coordinates;
2) the 5th acquisition module, for obtaining the object illumination of each passage corresponding with each according to the chromaticity coordinates of each in multiple target color coordinates and each passage; Wherein,
Above-mentioned 3rd acquiring unit 506 can comprise:
1) the 3rd processing module, for each lower driving parameter obtaining each passage as with each passage and each all corresponding driving parameter, and by the driving reference record of the equal correspondence of acquisition in tables of data; Wherein,
Above-mentioned first driver element 508 can comprise:
1) judge module, for judging the target color coordinates that the current needs of emergent light reach;
2) module is searched, for searching the driving parameter all corresponding with the target color coordinates that each passage and needs reach in tables of data;
3) driver module, drives each passage for using the driving parameter found.
In other words, in embodiments of the present invention, can by target setting chromaticity coordinates and by the driving reference record that obtains based on this target color coordinates to the mode in tables of data, before light fixture dispatches from the factory, calibrate target color coordinates and drive the mapping relations between parameter, and can be stored in the controller of light fixture by recording the tables of data obtained, so that the tables of data quick search prestored can be utilized to obtain the driving parameter of each passage matched with the target color coordinates reached needed for it in the process that uses in reality of light fixture, thus reach the effect accelerated further the governing speed that the emergent light of light fixture regulates, and reduce the requirement of the computing capability of the controller to light fixture.
By the way, set forth, but should be understood that technical solution of the present invention and operation principle thereof, above-described embodiment is only for the understanding of the present invention, and should not be considered as is limitation of the invention.Such as, with red in previous embodiment, green and blue three individual color channel are the coupling that example describes the illumination of each passage, but in other embodiments of the present invention, it is three primary colors that the color of this individual color channel is not limited in, for other individual color channel, still can by determine with its chromaticity coordinates adjustable colour gamut that is summit and the mode of combining target chromaticity coordinates obtains the object illumination of each passage, in fact, even if for the light fixture only with two individual color channel, still can by driving the adjustment of parameter to obtain in chromaticity coordinates space to it to be positioned at the shades of colour on the chromaticity coordinates of these two individual color channel line segment that is summit.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a driving method for light fixture, is characterized in that, comprising:
Obtain the chromaticity coordinates of each passage in multiple individual color channel, wherein, light fixture to be driven comprises described multiple individual color channel, and the emergent light of described light fixture to be driven is the monochromatic superposition that described multiple individual color channel sends separately;
The object illumination of described each passage is obtained according to the target color coordinates of described emergent light and the chromaticity coordinates of described each passage;
Obtain the driving parameter of the described each passage corresponding with the object illumination of described each passage;
The driving parameter of the described each passage obtained is used to drive described each passage.
2. method according to claim 1, is characterized in that, the driving parameter of described each passage that described acquisition is corresponding with the object illumination of described each passage comprises:
Process of fitting treatment is carried out to the multiple driving parameter sampling value corresponding with described each passage obtained in advance and multiple illumination sampled value, wherein, described multiple driving parameter sampling value and described multiple illumination sampled value one_to_one corresponding;
The corresponding relation between the driving parameter corresponding with described each passage and object illumination is obtained according to the result of described process of fitting treatment;
The driving parameter of the described each passage corresponding with the object illumination of described each passage is obtained according to described corresponding relation.
3. method according to claim 2, is characterized in that, before the described multiple driving parameter sampling value corresponding with described each passage to obtaining in advance and multiple illumination sampled value carry out process of fitting treatment, described method comprises:
Choose the described multiple driving parameter sampling values corresponding with described each passage;
The each driving parameter sampling value in described multiple driving parameter sampling value is used to drive described each passage;
When using described each driving parameter sampling value to drive described each passage, obtain the current illumination of described each passage as the illumination sampled value corresponding with described each driving parameter sampling value.
4. method according to claim 3, is characterized in that, the chromaticity coordinates of each passage in the multiple individual color channel of described acquisition comprises:
When using described each driving parameter sampling value to drive described each passage, obtain the current color coordinate of described each passage;
Using the mean value of multiple described current color coordinate that obtains under the described multiple driving parameter sampling value chromaticity coordinates as described each passage.
5. method according to claim 2, is characterized in that,
The described multiple driving parameter sampling value corresponding with described each passage to obtaining in advance and multiple illumination sampled value are carried out process of fitting treatment and are comprised: carry out linear fit to described multiple driving parameter sampling value and described multiple illumination sampled value;
The corresponding relation that the described result according to described process of fitting treatment obtains between the driving parameter corresponding with described each passage and object illumination comprises: obtain described corresponding relation according to the result of described linear fit: E=p*c+E
0, wherein, E represents the object illumination of described each passage, and c represents the driving parameter of described each passage, p and E
0for constant coefficient;
The driving parameter of the described described each passage corresponding with the object illumination of described each passage according to described corresponding relation acquisition comprises: the driving parameter obtaining described each passage according to following calculating formula: c=(E-E
0)/p.
6. method according to claim 2, is characterized in that,
The described multiple driving parameter sampling value corresponding with described each passage to obtaining in advance and multiple illumination sampled value are carried out process of fitting treatment and are comprised: adopt interpolation method to carry out process of fitting treatment to described multiple driving parameter sampling value and described multiple illumination sampled value;
The corresponding relation that the described result according to described process of fitting treatment obtains between the driving parameter corresponding with described each passage and object illumination comprises: obtain described corresponding relation according to the result of described process of fitting treatment: E=(E
2-E
1) * (c-c
1)/(c
2-c
1)+E
1, wherein, E represents the object illumination of described each passage, and c represents the driving parameter of described each passage, c
1represent in described multiple driving parameter sampling value and c
1<c, c
2represent in described multiple driving parameter sampling value and c
2>c, E
1represent in described multiple illumination sampled value with c
1corresponding one, E
2represent in described multiple illumination sampled value with c
2corresponding one;
The driving parameter of the described described each passage corresponding with the object illumination of described each passage according to described corresponding relation acquisition comprises: the driving parameter obtaining described each passage according to following calculating formula: c=(c
2-c
1) * (E-E
1)/(E
2-E
1)+c
1.
7. method according to any one of claim 1 to 6, is characterized in that, the object illumination of the described each passage of chromaticity coordinates acquisition of the described target color coordinates according to described emergent light and described each passage comprises:
The colour mixture region that to generate with the chromaticity coordinates of described each passage in default chromaticity coordinates space be summit;
If described target color coordinates is positioned at described colour mixture region, then according to described target color coordinates relative to described each passage chromaticity coordinates between relative position relation obtain the illumination ratio of described each passage;
Using the object illumination of the product of the illumination ratio of the illumination summation of described emergent light and described each passage as described each passage.
8. method according to any one of claim 1 to 6, is characterized in that,
The object illumination of the described each passage of chromaticity coordinates acquisition of the described target color coordinates according to described emergent light and described each passage comprises: choose multiple described target color coordinates; Chromaticity coordinates according to each in described multiple target color coordinates and described each passage obtains the object illumination with each corresponding described each passage described;
The driving parameter of described each passage that described acquisition is corresponding with the object illumination of described each passage comprises: each lower driving parameter obtaining described each passage described as with described each passage and each all corresponding driving parameter described, and by the driving reference record of the described equal correspondence of acquisition in tables of data;
The driving parameter of described each passage that described use obtains is carried out driving to described each passage and is comprised: judge the target color coordinates that the current needs of described emergent light reach; The driving parameter all corresponding with the target color coordinates that described each passage and described needs reach is searched in described tables of data; The driving parameter found is used to drive described each passage.
9. a drive unit for light fixture, is characterized in that, comprising:
First acquiring unit, for obtaining the chromaticity coordinates of each passage in multiple individual color channel, wherein, light fixture to be driven comprises described multiple individual color channel, and the emergent light of described light fixture to be driven is the monochromatic superposition that described multiple individual color channel sends separately;
Second acquisition unit, for obtaining the object illumination of described each passage according to the target color coordinates of described emergent light and the chromaticity coordinates of described each passage;
3rd acquiring unit, for obtaining the driving parameter of the described each passage corresponding with the object illumination of described each passage;
First driver element, drives described each passage for using the driving parameter of described each passage of acquisition.
10. device according to claim 9, is characterized in that, described 3rd acquiring unit comprises:
Fitting module, for carrying out process of fitting treatment to multiple driving parameter sampling value corresponding with described each passage obtained in advance and multiple illumination sampled value, wherein, described multiple driving parameter sampling value and described multiple illumination sampled value one_to_one corresponding;
First acquisition module, for obtaining the corresponding relation between the driving parameter corresponding with described each passage and object illumination according to the result of described process of fitting treatment;
Second acquisition module, for obtaining the driving parameter of the described each passage corresponding with the object illumination of described each passage according to described corresponding relation.
11. devices according to claim 10, is characterized in that, also comprise:
Choose unit, for choosing the described multiple driving parameter sampling values corresponding with described each passage;
Second driver element, drives described each passage for using each driving parameter sampling value in described multiple driving parameter sampling value;
4th acquiring unit, for when using described each driving parameter sampling value to drive described each passage, obtains the current illumination of described each passage as the illumination sampled value corresponding with described each driving parameter sampling value.
12. devices according to claim 11, is characterized in that, described first acquiring unit comprises:
3rd acquisition module, for when using described each driving parameter sampling value to drive described each passage, obtains the current color coordinate of described each passage;
First processing module, for the mean value of multiple described current color coordinate that will obtain under the described multiple driving parameter sampling value chromaticity coordinates as described each passage.
13. devices according to claim 10, is characterized in that,
Described fitting module comprises: the first matching submodule, for carrying out linear fit to described multiple driving parameter sampling value and described multiple illumination sampled value;
Described first acquisition module comprises: the first process submodule, for obtaining described corresponding relation according to the result of described linear fit: E=p*c+E
0, wherein, E represents the object illumination of described each passage, and c represents the driving parameter of described each passage, p and E
0for constant coefficient;
Described second acquisition module comprises: the second process submodule, for obtaining the driving parameter of described each passage according to following calculating formula: c=(E-E
0)/p.
14. methods according to claim 10, is characterized in that,
Described fitting module comprises: the second matching submodule, carries out process of fitting treatment for adopting interpolation method to described multiple driving parameter sampling value and described multiple illumination sampled value;
Described first acquiring unit comprises: the 3rd process submodule, for obtaining described corresponding relation according to the result of described process of fitting treatment: E=(E
2-E
1) * (c-c
1)/(c
2-c
1)+E
1, wherein, E represents the object illumination of described each passage, and c represents the driving parameter of described each passage, c
1represent in described multiple driving parameter sampling value and c
1<c, c
2represent in described multiple driving parameter sampling value and c
2>c, E
1represent in described multiple illumination sampled value with c
1corresponding one, E
2represent in described multiple illumination sampled value with c
2corresponding one;
Described second acquisition module comprises: the 4th process submodule, for obtaining the driving parameter of described each passage according to following calculating formula: c=(c
2-c
1) * (E-E
1)/(E
2-E
1)+c
1.
15. devices according to any one of claim 9 to 14, it is characterized in that, described second acquisition unit comprises:
Generation module, for the colour mixture region that to generate with the chromaticity coordinates of described each passage in default chromaticity coordinates space be summit;
4th acquisition module, for when described target color coordinates is positioned at described colour mixture region, according to described target color coordinates relative to described each passage chromaticity coordinates between relative position relation obtain the illumination ratio of described each passage;
Second processing module, for the product of the illumination ratio using the illumination summation of described emergent light and described each passage as the object illumination of described each passage.
16. devices according to any one of claim 9 to 14, is characterized in that,
Described second acquisition unit comprises: choose module, for choosing multiple described target color coordinates; 5th acquisition module, for obtaining the object illumination with each corresponding described each passage described according to the chromaticity coordinates of each in described multiple target color coordinates and described each passage;
Described 3rd acquiring unit comprises: the 3rd processing module, for each lower driving parameter obtaining described each passage described as with described each passage and each all corresponding driving parameter described, and by the driving reference record of the described equal correspondence of acquisition in tables of data;
Described first driver element comprises: judge module, for judging the target color coordinates that the current needs of described emergent light reach; Search module, for searching the driving parameter all corresponding with the target color coordinates that described each passage and described needs reach in described tables of data; Driver module, drives described each passage for using the driving parameter found.
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| PCT/CN2015/079453 WO2015176668A1 (en) | 2014-05-21 | 2015-05-21 | Lamp control method, device and system |
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Application publication date: 20151125 |