CN103813580B - The method of adjustment of the emergent light chromaticity coordinates of light source and adjusting device - Google Patents
The method of adjustment of the emergent light chromaticity coordinates of light source and adjusting device Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of method of adjustment and adjusting device of emergent light chromaticity coordinates of light source.Light source comprises the first light-emitting component, the second light-emitting component and the 3rd light-emitting component, and the emergent light of light source is mixed by three; The chromaticity coordinates of the first light-emitting component emergent light changes along with the change of running parameter, and the chromaticity coordinates of the emergent light of the second light-emitting component and the 3rd light-emitting component remains unchanged.Method of adjustment comprises: the chromaticity coordinates obtaining the first light-emitting component emergent light; Obtain the brightness of the first light-emitting component emergent light; Obtain the predetermined following MacAdam's ellipse P of four steps; According to the chromaticity coordinates of the first light-emitting component and the chromaticity coordinates of brightness and the second light-emitting component and the 3rd light-emitting component, determine the brightness of the second light-emitting component and the 3rd light-emitting component, make the chromaticity coordinates of the emergent light of light source be positioned at the following MacAdam's ellipse P of four steps.Embodiments provide a kind of method of adjustment of chromaticity coordinates of light source emergent light, make the color of emergent light keep stable.
Description
Technical field
The present invention relates to illumination and Display Technique field, particularly relate to a kind of method of adjustment and adjusting device of emergent light chromaticity coordinates of light source.
Background technology
In existing stage lighting, RGB(RGB) three-color light-emitting element closes light by wavelength and formed a branch of.When outgoing RGB monochromatic light, each light-emitting component of RGB is lighted separately, and when outgoing mixed light (such as white light), then RGB light-emitting component lights suitable brightness respectively to synthesize the emergent light of suitable color.Meanwhile, stage lighting can also change its luminosity by the driving power changing light-emitting component, and then realizes the adjustable of lamplight brightness.
But green light LED is along with the change of drive current, there is significant drift in its chromaticity coordinates.Fig. 1 is the chromaticity coordinates change schematic diagram of green light LED, blue-ray LED and red-light LED under different driving electric current, as shown in Figure 1, and drifting about significantly with drive current variations of green light LED, and blue-ray LED does not almost drift about, red-light LED drift is less.Therefore, when light display green glow also continues to adjust green glow brightness, human eye can see that the color of green glow changes while brightness adjustment.Specifically, when green glow brightness becomes large, the color of green glow can become closer to cyan.The drift of this wavelength is caused by two factors, and first is the change of electric current, and second is the change of junction temperature.
Prior art, in order to address this problem, has following two kinds of methods:
A) green emitting phosphor LED is used.The luminescent spectrum of green emitting phosphor is stable, and not with driving power change, but its problem is that luminescent spectrum is very wide, and the saturation of green glow is not high, and color is bright-coloured not.
B) PWM (PulseWidthModulation, pulse-width modulation) mode is used to control green light LED.Because PWM mode does not change the size of drive current, only change the duty ratio of driving pulse, therefore because the wave length shift that curent change causes does not exist; But the method still can not solve the wave length shift because variations injunction temperature causes.On the other hand, in stage application, because shooting and playing device thereof all have certain refreshing frequency (50 or 60 hertz), therefore the frequency of the pwm signal of driving LED must be very high, otherwise will occur the scintillation of beat frequency.
In fact, being not only green light LED, also there is similar problem in red laser light source: the chromaticity coordinates of the emergent light of red laser light source can change along with the change of the factor such as operating current or ambient temperature.Therefore be difficult to the method for adjustment being difficult to the chromaticity coordinates that a kind of light source emergent light is provided in technology in prior art, make the color of emergent light keep stable.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of method of adjustment and adjusting device of chromaticity coordinates of light source emergent light, makes the color of emergent light keep stable.
Embodiments provide a kind of method of adjustment of emergent light chromaticity coordinates of light source, light source comprises the first light-emitting component, the second light-emitting component and the 3rd light-emitting component, and the emergent light of light source is mixed by three; The chromaticity coordinates of the first light-emitting component emergent light changes along with the change of the running parameter of the first light-emitting component, and the chromaticity coordinates of the emergent light of the second light-emitting component and the 3rd light-emitting component remains unchanged along with the change of respective running parameter, it is characterized in that, comprising:
Obtain the chromaticity coordinates of the first light-emitting component emergent light;
Obtain the brightness of the first light-emitting component emergent light;
Obtain the predetermined following MacAdam's ellipse P of four steps;
According to the chromaticity coordinates of the chromaticity coordinates of the first light-emitting component and brightness, the second light-emitting component and the 3rd light-emitting component, determine the brightness of the second light-emitting component and the 3rd light-emitting component, make the chromaticity coordinates of the emergent light of light source be positioned at the following MacAdam's ellipse P of four steps.
The embodiment of the present invention additionally provides a kind of adjusting device of emergent light chromaticity coordinates of light source, and light source comprises the first light-emitting component, the second light-emitting component and the 3rd light-emitting component, and the emergent light of light source is mixed by three; The chromaticity coordinates of the first light-emitting component emergent light changes along with the change of the running parameter of the first light-emitting component, the chromaticity coordinates of the emergent light of the second light-emitting component and the 3rd light-emitting component remains unchanged along with the change of respective running parameter, it is characterized in that, this adjusting device comprises:
First acquisition module, for obtaining the chromaticity coordinates of the first light-emitting component emergent light;
Second acquisition module, for obtaining the brightness of the first light-emitting component emergent light;
3rd acquisition module, for obtaining the predetermined following MacAdam's ellipse P of four steps;
Brightness adjusting section, for the chromaticity coordinates according to the chromaticity coordinates of the first light-emitting component and brightness, the second light-emitting component and the 3rd light-emitting component, determine the brightness of the second light-emitting component and the 3rd light-emitting component, make the chromaticity coordinates of the emergent light of light source be positioned at the following MacAdam's ellipse P of four steps, and adjust the second light-emitting component and the 3rd light-emitting component reaches this brightness.
Compared with prior art, the embodiment of the present invention has following beneficial effect:
In the embodiment of the present invention, when the chromaticity coordinates of the emergent light of the first light-emitting component changes along with the change of the running parameter of the first light-emitting component, obtain chromaticity coordinates and the brightness of the first light-emitting component, the chromaticity coordinates of three's mixed light can be made to be positioned at MacAdam's ellipse all the time by the brightness of adjustment second light-emitting component and the 3rd light-emitting component.Because the chromaticity coordinates of the second light-emitting component and the 3rd light-emitting component is constant, therefore the ellipse of Adam below this four step exists.For the light in the following MacAdam's ellipse of four steps, its color distortion can not be discovered out, and then realizes the emergent light of exit temperature color.
Accompanying drawing explanation
Fig. 1 is the chromaticity coordinates change schematic diagram of green light LED, blue-ray LED and red-light LED under different driving electric current;
Fig. 2 is the structural representation of light source of the present invention;
Fig. 3 is the schematic flow sheet of an embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention;
Fig. 4 a is the position view of the oval P of Adam in the present embodiment;
Fig. 4 b is the schematic diagram in the chromaticity coordinates region of the mixed light of luminous outgoing in the present embodiment;
Fig. 5 is another embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention;
Fig. 6 is another embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention;
Fig. 7 is another embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention;
Fig. 8 is the schematic diagram of an embodiment of the adjusting device of the emergent light chromaticity coordinates of light source of the present invention.
Embodiment
Invention thinking of the present invention is: the chromaticity coordinates of the first light-emitting component emergent light changes along with the change of the running parameter of the first light-emitting component.When the chromaticity coordinates of the first light-emitting component changes, change the brightness of the second light-emitting component and/or the 3rd light-emitting component, make the chromaticity coordinates of the mixed light of three light-emitting components be positioned at the following MacAdam's ellipse of same four step all the time.Because the chromaticity coordinates of the second light-emitting component and the 3rd light-emitting component remains unchanged along with the change of respective running parameter, therefore the ellipse of Adam below this four step exists.And human eye is not easy to aware for the chromaticity coordinates change in the following MacAdam's ellipse of four steps, now the color of the emergent light of light source is more stable.
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Fig. 2 is the structural representation of light source of the present invention, as shown in Figure 2, light source comprises the first light-emitting component 101, second light-emitting component 102, the 3rd light-emitting component 103 and Multiplexing apparatus 104, first light-emitting component 101, second light-emitting component 102, the 3rd light-emitting component 103 are specifically respectively: green light LED, red-light LED and blue-ray LED.The emergent light of green light LED 101, red-light LED 102, blue-ray LED 103 synthesizes light beam outgoing through Multiplexing apparatus 104, and this emergent light is green mixed light.Certainly, in other execution mode of the present invention, conjunction light mode is a variety of in addition, is not limited to the Multiplexing apparatus in the present embodiment.
The chromaticity coordinates of green light LED can change along with the change of operating current, operating voltage and working temperature etc., and the change that the chromaticity coordinates of red-light LED and blue-ray LED can be regarded as along with operating current, operating voltage and working temperature etc. remains unchanged.In fact, the chromaticity coordinates of blue-ray LED and red-light LED slightly can change along with the change of operating current, operating voltage or working temperature, but relative to the chromaticity coordinates intensity of variation of green light LED, the chromaticity coordinates change of blue-ray LED and red-light LED is very little or human eye is very insensitive to the change of its color, therefore can think that the chromaticity coordinates of blue-ray LED and red-light LED remains unchanged.
Fig. 3 is the schematic flow sheet of an embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention, and as shown in Figure 3, the method for adjustment of the chromaticity coordinates of the green mixed light of outgoing of light source comprises:
Step S11: the chromaticity coordinates obtaining green light LED 101 emergent light.
Here acquisition methods is the chromaticity coordinates utilizing color detection device to detect the emergent light of green light LED 101.
Step S12: the brightness obtaining green light LED 101 emergent light.
Acquisition methods in the present embodiment is the brightness utilizing intensity detection measurement device green light LED 101 emergent light.In actual applications, brightness here often represents with GTG.
S13, obtain the predetermined following MacAdam's ellipse P of four steps.
Fig. 4 a is the position view of the oval P of Adam in the present embodiment, in order to obtain the following MacAdam's ellipse P of above-mentioned four step, can take following steps:
One end points M of A, the connection chromaticity coordinates point A of red-light LED 102 and the chromaticity coordinates change curve of green light LED 101, obtains line segment one MA;
Wherein, green light LED chromaticity coordinates change curve on a chromaticity diagram can by changing the running parameter of green light LED, and record its chromaticity coordinates variation track and obtain, this chromaticity coordinates variation track is chromaticity coordinates change curve, and is pre-stored in the memory of light source by the chromaticity coordinates change curve of green light LED.
Another end points N of B, the connection chromaticity coordinates point B of blue-ray LED 103 and the chromaticity coordinates change curve of green light LED 101 is line segment two NB, and line segment one and line segment two intersect at a C.
C, obtain the following MacAdam's ellipse P of four steps, make the following MacAdam's ellipse of this four step have an intersection point at least with line segment one MA, line segment two NB respectively.
The following MacAdam's ellipse P of four steps is obtained by above-mentioned steps, for the green light LED of random colour coordinate, the chromaticity coordinates that at least there is any in MacAdam's ellipse P can be mixed to get by certain brightness ratio by the emergent light of this green light LED and red-light LED, blue-ray LED.
In fact, MacAdam's ellipse P here also can for presetting and being stored in the memory of light source, and now step S13 is specially and obtains predetermined MacAdam's ellipse P from memory.
What deserves to be explained is that above-mentioned steps S11, the sequencing that S12, S13 are unfixing can select enforcement order as required.
S14, according to the chromaticity coordinates of green light LED 101 and the chromaticity coordinates of brightness and red-light LED 102 and blue-ray LED 103, determine the brightness of red-light LED 102 and blue-ray LED 103, make the chromaticity coordinates of the emergent light of light source be positioned at the following MacAdam's ellipse P of four steps.
For the chromaticity coordinates of blue-ray LED, red-light LED, the mean value of blue-ray LED when can get different operating electric current, operating voltage or working temperature and the respective chromaticity coordinates of red-light LED is as its respective chromaticity coordinates, and blue-ray LED when also directly can get the operating current, operating voltage or the working temperature that the most often use and the respective chromaticity coordinates of red-light LED are as its respective chromaticity coordinates.Due in the course of the work, the chromaticity coordinates of red-light LED, blue-ray LED remains unchanged all substantially, and the chromaticity coordinates of red-light LED and blue-ray LED can be stored in advance in the memory of light source.
Particularly, for the chromaticity coordinates (x of the green light LED under a certain running parameter
1, y
1), get a bit (x in MacAdam's ellipse P
0, y
0) chromaticity coordinates of green mixed light for expecting, and this point is positioned at the chromaticity coordinates (x of green light LED
1, y
1), the chromaticity coordinates (x of red-light LED
2, y
2), the chromaticity coordinates (x of green light LED
3, y
3) in the gamut range that surrounds, then the brightness of red-light LED and blue-ray LED meets formula:
Wherein Y
1for the lumen number of green light LED, Y
2for the lumen number of red-light LED, Y
3for the lumen number of blue-ray LED.The lumen number of red-light LED and blue-ray LED can be obtained, i.e. its brightness by above-mentioned formulae discovery.
By above-mentioned steps, the chromaticity coordinates of the green mixed light of light source outgoing can be obtained, make the color of this green mixed light more stable.The region that the scope of the colour gamut of the light source emergent light after adjustment is above-mentioned MacAdam's ellipse, blue-ray LED chromaticity coordinates, red-light LED chromaticity coordinates surround, although relative to the region that the chromaticity coordinates of green light LED, blue-ray LED chromaticity coordinates, red-light LED chromaticity coordinates surround, colour gamut after adjustment reduces, but the color near green glow is expressed more accurately and stablized.
In step s 13, preferably, MacAdam's ellipse P in the present embodiment is centered by C point, its advantage is: the colour gamut that the chromaticity coordinates that C point is positioned at blue-ray LED 103, red-light LED 102 and arbitrary brightness green LED101 surrounds, always there is blue-ray LED 103, the red-light LED 102 of certain brightness ratio, the chromaticity coordinates of the mixed light of its emergent light and green light LED 101 emergent light is positioned at C point, and therefore, the MacAdam's ellipse centered by C point is safer a kind of mode.
In another preferred mode, MacAdam's ellipse P can region between the intersection point C of line segment one and line segment two and the chromaticity coordinates change curve of green light LED 101, relative to other MacAdam's ellipse not being positioned at this region, when being arranged in this region MacAdam's ellipse, light source needs supplementary Red and blue light less, and the color saturation of the green mixed light of now light source outgoing is higher.
Further, MacAdam's ellipse P can with line segment one and line segment two tangent, now the chromaticity coordinates of MacAdam's ellipse P distance green light LED is nearest, therefore relative to other MacAdam's ellipse, light source is under most of running parameter, need supplementary Red and blue light minimum, the color saturation of the green mixed light of outgoing is the highest.
MacAdam's ellipse also can through C point, the now region of MacAdam's ellipse P between intersection point C and the chromaticity coordinates change curve of the first light-emitting component, less when light source needs the Red and blue light that supplements likely tangent than MacAdam's ellipse and line segment one, line segment two, be also a kind of preferably mode.
In step S14, the chromaticity coordinates of any point in MacAdam's ellipse P as light source emergent light can be got, preferably, the chromaticity coordinates of light source emergent light is positioned on the boundary line of MacAdam's ellipse, this boundary line is between line segment one, line segment two and near green light LED 101 chromaticity coordinates change curve side, other region on this MacAdam's ellipse inside and border is now positioned at relative to chromaticity coordinates, light source needs supplementary Red and blue light minimum, and the color saturation of the green mixed light of now outgoing is the highest.
As can be seen from above-mentioned steps, MacAdam's ellipse P is the closer to the chromaticity coordinates change curve of green light LED, and the required Red and blue light supplemented of light source is fewer.And in MacAdam's ellipse P, the chosen position of chromaticity coordinates is the closer to the chromaticity coordinates change curve of green light LED, the required Red and blue light supplemented of light source is fewer, therefore the region of above-mentioned MacAdam's ellipse P between green light LED chromaticity coordinates change curve and C point and with line segment one, when line segment two is tangent, the chromaticity coordinates getting light source emergent light is positioned on the boundary line of MacAdam's ellipse, this boundary line is positioned at line segment one, between line segment two and close green light LED 101 chromaticity coordinates change curve side, then the schematic diagram of the chromaticity coordinates region S of the green mixed light of light source outgoing as shown in Figure 4 b, this chromaticity coordinates region S is oval upper rim, now chromaticity coordinates is optimal value, the Red and blue light supplemented is minimum, the color saturation of the green mixed light of light source outgoing is the highest.
In addition, in order to simplify the control of light source, can method by experiment, for each brightness of green glow and chromaticity coordinates value, by attempting the output of Red and blue light, because the chromaticity coordinates of blue-ray LED and red-light LED remains unchanged, by calculating the position that can obtain the mixed green light color coordinate expected, record the input parameter of now RGB light, and be stored in the memory of light source the mapping relations also set up with this green glow brightness and chromaticity coordinates.For arbitrary chromaticity coordinates, the brightness of green light LED, the blue-ray LED of its correspondence and the brightness of red-light LED can be obtained by this mapping form of inquiry.
On the other hand, because the brightness of green light LED outgoing is all relevant with drive current with chromaticity coordinates, the outgoing brightness of green light LED is simultaneously controlled by again the grey decision-making to the green glow corresponding to the control signal of light source, so this three of value of the brightness of green light LED emergent light and chromaticity coordinates, green glow grey decision-making, drive current exists relation one to one equally, and then any one in this three can set up mapping relations with the input parameter of aforesaid Red and blue light LED.When needs green glow exports certain gray-scale intensity, directly by the output parameter of each color LED corresponding to this GTG of mapping relationship searching, and can be performed.The control table that the green glow that such as table 1 is depicted as a kind of light source exports, can realize the output of brightness from the green glow of 1 to 255 GTG.
The control table that table 1 green glow exports
In traditional control method, the GTG of different colours light and its input parameter one_to_one corresponding is needed to get up and are stored equally, therefore the present invention only needs this storage form of replacing in former light fixture, the brightness of red-light LED 102 and blue-ray LED 103 just can be obtained by table look-up (i.e. mapping relations), just can realize stable green glow and apply the output of mixed light of this green glow.
In upper table, consider that adding of a small amount of Red and blue light can't cause the inaccurate of the marked change of brightness and output brightness GTG, so there is no the drive current changing green glow.In fact, green glow also can reduce electric current a little to make the more accurate of output brightness GTG.
MacAdam's ellipse P in the present embodiment is the following MacAdam's ellipse of four steps, and for the chromaticity coordinates change within a step MacAdam's ellipse, human eye can discover out completely; For the chromaticity coordinates change within two step MacAdam's ellipses, human eye is also substantially can not discover out; For the chromaticity coordinates change in three steps and four step MacAdam's ellipses, human eye is also not easy to discover out, and particularly when running parameter is continually varying time, the change of chromaticity coordinates is more difficult to discover.The range size of MacAdam's ellipse needs to select according to concrete requirement, require high to colour consistency, the MacAdam's ellipse then chosen should be less, but now MacAdam's ellipse can be far away apart from the chromaticity coordinates of green light LED, the ruddiness mixed in green glow, blue light are more, and green glow saturation is good not; If instead high to the requirement of color saturation, then the MacAdam's ellipse chosen should be comparatively large, and the ruddiness mixed in green glow, blue light are less, but colour consistency is good not.Therefore, in practical application, need to choose suitable MacAdam's ellipse to balance the relation between consistency and green light color saturation.
What deserves to be explained is, carry out adjustment chromaticity coordinates to green light LED, might not be limited to and utilize red-light LED, blue-ray LED adjusts, and the second light-emitting component can also be green light fluorescent powder LED or yellow fluorescent powder LED, and the 3rd light-emitting component can also be green light LED.Green light fluorescent powder LED and yellow fluorescent powder LED supplements green light LED, and relative to red-light LED, the chromaticity coordinates of the green mixed light after its adjustment is closer to the chromaticity coordinates of green light LED emergent light, and color saturation is higher.For green light LED, relative to blue-ray LED, the chromaticity coordinates of the mixed light after its adjustment is also closer to the chromaticity coordinates of green light LED emergent light, and color saturation is higher.
In addition, red laser light source also can change chromaticity coordinates along with the factors vary such as operating current or ambient temperature, therefore red laser light source also can improve in this way, such as, green laser light source and the chromaticity coordinates of blue laser light source to the emergent light of red laser light source can be selected to adjust.
Embodiment two
Fig. 5 is another embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention, as shown in Figure 5, S12 ~ the S14 of the chromaticity coordinates method of adjustment of light source emergent light shown in step S23 ~ S25 and the Fig. 3 in the present embodiment is identical, difference is, the step S11 in method shown in Fig. 3 comprises in the present embodiment:
The running parameter of S21, acquisition green light LED;
S22, from the chromaticity coordinates of emergent light and the corresponding relation of running parameter of the first light-emitting component preserved in advance, obtain the chromaticity coordinates corresponding with obtained running parameter.
Here running parameter is specially operating voltage or the operating current of green light LED.In other execution mode of the present invention, running parameter also can be other parameters relevant with the emergent light chromaticity coordinates of green light LED such as working temperature.
The chromaticity coordinates of the emergent light of green light LED and the corresponding relation of running parameter, by changing the green light LED chromaticity coordinates under running parameter acquisition different operating parameter, and can be stored in the corresponding relation of chromaticity coordinates and running parameter in the memory of light source.Due to the operating voltage of green light LED or be one_to_one corresponding between operating current and its chromaticity coordinates, and operating current or operating voltage are relatively easily determined, therefore more easily can determine the chromaticity coordinates of green light LED by this method, and not need to increase sniffer again.
Embodiment three
Fig. 6 is another embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention, as shown in Figure 6, shown in step S31 and Fig. 3 in the present embodiment, the S11 of the chromaticity coordinates method of adjustment of light source emergent light is identical, S13 ~ the S14 of the chromaticity coordinates method of adjustment of the emergent light of light source shown in step S34 ~ S35 and Fig. 3 is identical, difference is, the step S12 in method shown in Fig. 3 comprises in the present embodiment:
S32, the operating current obtaining green light LED or operating voltage.
Similarly, in other execution mode of the present invention, above-mentioned operating current or operating voltage can be other running parameter, such as working temperature etc.
S33, from the chromaticity coordinates of emergent light and the corresponding relation of running parameter of the first light-emitting component preserved in advance, obtain the brightness corresponding with obtained operating current or operating voltage.
Similarly, more easily can determine the chromaticity coordinates of green light LED by this method, and not need to increase sniffer again.The operating voltage of green light LED or the corresponding relation between operating current and its brightness are also be pre-stored in the memory of light source.
Embodiment four
The light source of the present embodiment also comprises the 4th light-emitting component, for yellow light LED, Fig. 7 is another embodiment of the chromaticity coordinates method of adjustment of light source emergent light of the present invention, as shown in Figure 7, S11 ~ the S13 of the chromaticity coordinates method of adjustment of light source emergent light shown in step S41 ~ S43 and the Fig. 3 in the present embodiment is identical, and difference is:
Step S44 is: according to chromaticity coordinates and the brightness of green light LED, determine the brightness of red-light LED, blue-ray LED, yellow light LED, makes the chromaticity coordinates of the emergent light of light source be positioned at the following MacAdam's ellipse P of four steps.
When the green glow using yellow light LED and blue-ray LED to adjust light source outgoing, relative to red-light LED and blue-ray LED, supplementary gold-tinted and blue light less, the chromaticity coordinates of mixed light is closer to the chromaticity coordinates of green light LED, and color saturation is higher.And in the present embodiment, utilize yellow light LED, red-light LED, the blue-ray LED emergent light to green light LED to adjust, except improving except color saturation, the brightness ratio of three's emergent light can have multiple choices, can more control as required neatly.
Certainly, in other embodiments, yellow light LED can replace with other colour light source, also can also comprise the chromaticity coordinates of more light-emitting component to green glow emergent light and adjust.
It is emphasized that, the present invention is actually and regulates monochromatic colors such as green glows, output for mixed light does not then affect (except the mixed light near the monochromatic light before adjustment), this is because mixed light originally needs the mixing of multiple light, its chromaticity coordinates generally can drop within new gamut range, does not affect by of the present invention.Specifically for green glow, each mixed light has the green color components pre-set, and this green color components can be calculate, and also can be experiment.As long as need to export this mixed light, the GTG of the correspondence that green glow exports just must be set accordingly.Application the present invention just substituted for the output control table exporting the monochromatic GTG of green glow, therefore still can export mixed light according to original method.
Embodiment four
Fig. 8 is the schematic diagram of an embodiment of the adjusting device of the emergent light chromaticity coordinates of light source of the present invention, and light source comprises the first light-emitting component, the second light-emitting component and the 3rd light-emitting component, and the emergent light of light source is mixed by three; The chromaticity coordinates of the first light-emitting component emergent light changes along with the change of the running parameter of the first light-emitting component, the chromaticity coordinates of the emergent light of the second light-emitting component and the 3rd light-emitting component remains unchanged along with the change of respective running parameter, as shown in Figure 8, adjusting device comprises:
First acquisition module, this first acquisition module is for obtaining the chromaticity coordinates of the first light-emitting component emergent light.Such as, the first acquisition module can be color detection device, can detect the chromaticity coordinates of the first light-emitting component, and this chromaticity coordinates is passed to brightness adjusting section.
Second acquisition module, this second acquisition module is for obtaining the brightness of the first light-emitting component emergent light.Such as, the second acquisition module can be intensity detection device, can detect the brightness of the emergent light of the first light-emitting component, and this brightness is passed to brightness adjusting section.
3rd acquisition module, the 3rd acquisition module is for obtaining the predetermined following MacAdam's ellipse P of four steps.3rd acquisition module can be calculation element, with calculating MacAdam's ellipse P, or also can be from memory access, obtain the MacAdam's ellipse P prestored, and this MacAdam's ellipse P is passed to brightness adjustment unit.
Brightness adjusting section, this brightness adjusting section is used for according to the chromaticity coordinates of the first light-emitting component and the chromaticity coordinates of brightness and the second light-emitting component and the 3rd light-emitting component, determine the brightness of the second light-emitting component and the 3rd light-emitting component, make the chromaticity coordinates of the emergent light of light source be positioned at the following MacAdam's ellipse P of four steps, and adjust the second light-emitting component and the 3rd light-emitting component reaches this brightness.Brightness adjusting section receives the data of the first acquisition module, the second acquisition module and the 3rd acquisition module, and can by calculating the brightness of qualified second light-emitting component and the 3rd light-emitting component.By adjusting the second light-emitting component and the 3rd light-emitting component reaches the brightness calculated, the chromaticity coordinates of light source emergent light is made to be positioned at fixing MacAdam's ellipse P.
It is easily understood that the adjusting device in the present embodiment can realize the function described in the various embodiments described above.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a method of adjustment for the emergent light chromaticity coordinates of light source, described light source comprises the first light-emitting component, the second light-emitting component and the 3rd light-emitting component, and the emergent light of light source is mixed by three; The chromaticity coordinates of described first light-emitting component emergent light changes along with the change of the running parameter of the first light-emitting component, the chromaticity coordinates of the emergent light of described second light-emitting component and the 3rd light-emitting component remains unchanged along with the change of respective running parameter, it is characterized in that, this method of adjustment comprises:
Obtain the chromaticity coordinates of described first light-emitting component emergent light;
Obtain the brightness of described first light-emitting component emergent light;
Obtain the predetermined following MacAdam's ellipse P of four steps;
According to the chromaticity coordinates of the chromaticity coordinates of described first light-emitting component and brightness, the second light-emitting component and the 3rd light-emitting component, determine the brightness of the second light-emitting component and the 3rd light-emitting component, make the chromaticity coordinates of the emergent light of described light source be positioned at the following MacAdam's ellipse P of described four step.
2. the method for adjustment of the chromaticity coordinates of the emergent light of light source according to claim 1, is characterized in that:
The described predetermined following MacAdam's ellipse P of four steps has an intersection point at least with line segment one MA, line segment two NB respectively;
Line segment one MA is the line segment of the end points M connecting the chromaticity coordinates point A of described second light-emitting component and the chromaticity coordinates change curve of the first light-emitting component, and the chromaticity coordinates change curve of described first light-emitting component is the variation track of the chromaticity coordinates changing the first light-emitting component along with running parameter;
Line segment two NB is the line segment of another end points N connecting the chromaticity coordinates point B of described 3rd light-emitting component and the chromaticity coordinates change curve of described first light-emitting component, and described line segment one and line segment two intersect at a C.
3. the method for adjustment of the emergent light chromaticity coordinates of light source according to claim 2, is characterized in that: described MacAdam's ellipse P is centered by C point.
4. the method for adjustment of the emergent light chromaticity coordinates of light source according to claim 2, is characterized in that: the region of described MacAdam's ellipse P between the intersection point C and the chromaticity coordinates change curve of described first light-emitting component of described line segment one and line segment two.
5. the method for adjustment of the emergent light chromaticity coordinates of light source according to claim 4, is characterized in that: described MacAdam's ellipse P is through C point; Or,
Described MacAdam's ellipse P and described line segment one and line segment two tangent.
6. the method for adjustment of the emergent light chromaticity coordinates of the light source according to claim 2-5 any one, it is characterized in that: the chromaticity coordinates of described light source emergent light is positioned on the boundary line of described MacAdam's ellipse, this boundary line is between described line segment one, line segment two and near described first light-emitting component chromaticity coordinates change curve side.
7. an adjusting device for the emergent light chromaticity coordinates of light source, described light source comprises the first light-emitting component, the second light-emitting component and the 3rd light-emitting component, and the emergent light of light source is mixed by three; The chromaticity coordinates of described first light-emitting component emergent light changes along with the change of the running parameter of the first light-emitting component, the chromaticity coordinates of the emergent light of described second light-emitting component and the 3rd light-emitting component remains unchanged along with the change of respective running parameter, it is characterized in that, this adjusting device comprises:
First acquisition module, for obtaining the chromaticity coordinates of described first light-emitting component emergent light;
Second acquisition module, for obtaining the brightness of described first light-emitting component emergent light;
3rd acquisition module, for obtaining the predetermined following MacAdam's ellipse P of four steps;
Brightness adjusting section, for according to the chromaticity coordinates of described first light-emitting component and the chromaticity coordinates of brightness and the second light-emitting component and the 3rd light-emitting component, determine the brightness of described second light-emitting component and the 3rd light-emitting component, make the chromaticity coordinates of the emergent light of described light source be positioned at the following MacAdam's ellipse P of described four step, and adjust described second light-emitting component and the 3rd light-emitting component reaches this brightness.
8. the adjusting device of the emergent light chromaticity coordinates of light source according to claim 7, is characterized in that:
The described predetermined following MacAdam's ellipse P of four steps has an intersection point at least with line segment one MA, line segment two NB respectively;
Line segment one MA is the line segment of the end points M connecting the chromaticity coordinates point A of described second light-emitting component and the chromaticity coordinates change curve of the first light-emitting component, and the chromaticity coordinates change curve of described first light-emitting component is the variation track of the chromaticity coordinates changing the first light-emitting component along with running parameter;
Line segment two NB is the line segment of another end points N connecting the chromaticity coordinates point B of described 3rd light-emitting component and the chromaticity coordinates change curve of described first light-emitting component, and described line segment one and line segment two intersect at a C;
The region of described MacAdam's ellipse P between the intersection point C and the chromaticity coordinates change curve of described first light-emitting component of described line segment one and line segment two.
9. the adjusting device of the emergent light chromaticity coordinates of light source according to claim 8, is characterized in that: described MacAdam's ellipse P is through C point; Or,
Described MacAdam's ellipse P and described line segment one and line segment two tangent.
10. the adjusting device of the emergent light chromaticity coordinates of light source according to claim 8 or claim 9, it is characterized in that: the chromaticity coordinates of described light source emergent light is positioned on the boundary line of described MacAdam's ellipse, this boundary line is between described line segment one, line segment two and near described first light-emitting component chromaticity coordinates change curve side.
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