CN103839936A - Manufacturing method for LED array device - Google Patents

Manufacturing method for LED array device Download PDF

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Publication number
CN103839936A
CN103839936A CN201210479170.3A CN201210479170A CN103839936A CN 103839936 A CN103839936 A CN 103839936A CN 201210479170 A CN201210479170 A CN 201210479170A CN 103839936 A CN103839936 A CN 103839936A
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led
chromaticity coordinates
group
average
array device
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CN103839936B (en
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李屹
杨毅
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Shenzhen Yili Ruiguang Technology Development Co Ltd
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Appotronics Corp Ltd
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Abstract

The embodiment of the invention discloses a manufacturing method for an LED array device. The manufacturing method is characterized by obtaining an expectation color coordinate of emergent light of the LED array device; obtaining the color coordinate mean values of n LED groups so as to make the expectation color coordinate located in an area defined by a connection line of the color coordinate mean value of the n LED groups; obtaining the total number of needed LEDs; obtaining the number of needed LEDs in each group so as to make a color coordinate of mixed light of m<1> LEDs, color coordinates of which are (x<1>, y<1>,...m<i> LEDs, color coordinates of which are (x<i>, y<i>),...and m<n> LEDs, color coordinates of which are (x<n>, y<n>) be the expectation color coordinate, wherein m<1>+...m<i>+...m<n>=m<0>. LEDs of a needed number of each group are obtained in a color gamut of each LED group and arrayed into an LED array device. The manufacturing method for the LED array device makes the difference between the color of the emergent light and the color of a preset color coordinate not easy to identify and is an LED-array manufacturing method which is lower in cost.

Description

The manufacture method of LED array device
Technical field
The present invention relates to illumination and Display Technique field, particularly relate to a kind of manufacture method of LED array device.
Background technology
LED has advantages of long, the high and low radiation of light efficiency of life-span and low-power consumption, and therefore LED is applied in the every field such as illumination, Projection Display gradually.For example, in prior art, LED array is often used to do the light source of the light-source systems such as stage lighting.In current LED production process, even for the LED of same batch of production, between the chromaticity coordinates of different LED, there is also larger difference, and the assembling of LED array of the prior art is to choose at random several in same batch of LED to assemble, therefore the emergent light chromaticity coordinates of LED array of assembling tends to the chromaticity coordinates of the emergent light of predetermined LED array variant, chromaticity coordinates between different LED array also can be variant in addition, difference between these chromaticity coordinatess can make the color distortion of emergent light be perceived by human eye, have influence on the performance of LED array emergent light.
One of solution of the prior art is in production process, only to use chromaticity coordinates to be positioned to expect chromaticity coordinates LED more among a small circle around, the difference between different LED chromaticity coordinates can not discovered by human eye, and therefore the difference between the emergent light chromaticity coordinates of LED array and expectation chromaticity coordinates also can not discovered by human eye.But other LED in same batch just can not be utilized, thereby has greatly improved production cost.Another solution is the LED of different chromaticity coordinatess to be applied to different drive currents or voltage, thereby regulate the emergent light intensity of different LED to adjust the chromaticity coordinates of the emergent light of LED array.Clearly, this way need to increase power control, has increased the complexity of LED array device, has improved cost.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of manufacture method of LED array device, this manufacture method can make LED array device emergent light color and predetermined color coordinate color distortion is not easy to be distinguished by naked eyes and cost compare is low.
The embodiment of the present invention provides a kind of manufacture method of LED array device, it is characterized in that, comprising:
Obtain the expectation chromaticity coordinates (x of the emergent light of LED array device 0, y 0);
Obtain the chromaticity coordinates average of n LED group, to make to expect chromaticity coordinates (x 0, y 0) line that is positioned at the chromaticity coordinates average of this n LED group surrounds region, n is greater than 1 integer, every group of chromaticity coordinates average in each LED group colour gamut the assembly average of chromaticity coordinates a little, the colour gamut of this n LED group covers respectively the zones of different of chromatic diagram, and the coverage in each region is no more than 3 step MacAdam's ellipses;
Obtain the total quantity m of the required LED of LED array device 0;
The quantity of obtaining every group of required LED in n LED group, makes m 1individual chromaticity coordinates is (x 1, y 1) LED, m 2individual chromaticity coordinates is (x 2, y 2) LED ... m iindividual chromaticity coordinates is (x i, y i) LED ... m nindividual chromaticity coordinates is (x n, y n) the chromaticity coordinates of mixed light of LED for expecting chromaticity coordinates, and m 1+ ... + m i+ ... + m n=m 0, 1≤i≤n, 1≤m i≤ m 0, wherein m ibe the quantity that i LED organizes required LED, (x i, y i) be the chromaticity coordinates average of i LED group colour gamut;
In the colour gamut of the each LED group in the n having obtained a LED group, obtain the LED of each group of requirement, and the LED of this each group requirement is arranged into LED array device.
Compared with prior art, the embodiment of the present invention has following beneficial effect:
In the embodiment of the present invention, step is obtained the quantity of every group of required LED in n LED group, makes m 1individual chromaticity coordinates is (x 1, y 1) LED, m 2individual chromaticity coordinates is (x 2, y 2) LED ... m iindividual chromaticity coordinates is (x i, y i) LED ... m nindividual chromaticity coordinates is (x n, y n) the chromaticity coordinates of mixed light of LED for expecting chromaticity coordinates, be to regard all LED in each LED group as chromaticity coordinates is the LED of this LED group chromaticity coordinates average, calculate the requirement of every group of LED.But because differing, the chromaticity coordinates of the every LEDs in each LED group establishes a capital the chromaticity coordinates average that equals this LED group, calculate with the chromaticity coordinates of the chromaticity coordinates average point of LED group colour gamut quantity that each LED organizes and have error, in the chromaticity coordinates region that its error is organized with LED, the coverage in the region of area maximum is relevant, and the coverage in each region is no more than 3 step MacAdam's ellipses, therefore the chromaticity coordinates of LED array device emergent light is less than 3 step Adam ellipses with the difference of expecting chromaticity coordinates, and the difference of the two color is not easy to be discovered by human eye.Owing to obtaining the chromaticity coordinates average of n LED group, the line that the chromaticity coordinates that only need meet the expectation is positioned at the chromaticity coordinates average of this n LED group surrounds region, therefore the precision of the chromaticity coordinates of mixed light just only depends on the chromaticity coordinates precision of each group LED group, and do not limit for the color distinction of the LED between group and group, do not require that as prior art, making the LED color of all groups all concentrate on expects near chromaticity coordinates, in addition, under normal working voltage, LED array device emergent light meets the demands, therefore the LED of different chromaticity coordinatess does not need to apply different driving voltages or electric current regulates mixed light chromaticity coordinates yet, from having reduced production cost.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of an embodiment of the manufacture method of LED array device of the present invention;
Fig. 2 is the schematic flow sheet of the another embodiment of the manufacture method of LED array device of the present invention;
Fig. 3 is the colour gamut of 5 LED groups predetermined in embodiment illustrated in fig. 2 and the schematic diagram of expecting the mode of choosing that chromaticity coordinates and 2 LED organize;
Fig. 4 is the colour gamut of 5 LED groups predetermined in embodiment illustrated in fig. 2 and the schematic diagram of expecting the mode of choosing that chromaticity coordinates and 3 LED organize.
Embodiment
Below in conjunction with drawings and the embodiments, embodiments of the invention are carried out to labor.
Fig. 1 is the schematic flow sheet of an embodiment of the manufacture method of LED array device in the embodiment of the present invention, and as shown in Figure 1, the manufacture method of LED array device comprises:
Step S11: the expectation chromaticity coordinates (x0, y0) that obtains the emergent light of LED array device;
The executive agent of the embodiment of the present invention can be the staff who manufactures LED array device, can be also the manufacturing equipment of LED array device, and the manufacturing equipment take executive agent as LED array device in the present embodiment describes as example.
The expectation chromaticity coordinates of LED array device can be set according to actual conditions, for example, sets according to customer demand.The obtain manner of expectation chromaticity coordinates has multiple, for example, can expect that chromaticity coordinates is to above-mentioned manufacturing equipment by staff or external input unit input; Expect that chromaticity coordinates also can be pre-stored in the memory of above-mentioned manufacturing equipment, manufacturing equipment directly reads this expectation chromaticity coordinates from memory.
Step S12: obtain the chromaticity coordinates average of the LED group of n, to make to expect chromaticity coordinates (x 0, y 0) be positioned at the region that the chromaticity coordinates average of this n LED group surrounds, n is greater than 1 integer, every group of chromaticity coordinates average in each LED group colour gamut the assembly average of chromaticity coordinates a little, the colour gamut of this n LED group covers respectively the zones of different of chromatic diagram, and the coverage of regional is all no more than 3 step MacAdam's ellipses.
The LED group here by chromaticity coordinates on chromatic diagram be positioned at a certain chromaticity coordinates peripheral region it is more than two that LED forms, above-mentioned a certain chromaticity coordinates is the chromaticity coordinates average of LED group, this peripheral region is the colour gamut of LED group.In actual applications, supplier generally can provide some LED groups for you to choose, certainly, also can stipulate colour gamut and the chromaticity coordinates average of LED group, requires supplier to select in accordance with regulations LED and forms a LED group.In the time that n is 2, expect that chromaticity coordinates is positioned at region that the chromaticity coordinates average of n LED group surrounds and refers to and expect that chromaticity coordinates is positioned on the line of the chromaticity coordinates average that 2 LED organize.
The chromaticity coordinates average here represents the mean value that in each LED group colour gamut, institute's chromaticity coordinates is a little added up, the chromaticity coordinates average of LED group can obtain from supplier, also can obtain by chromaticity coordinates the computation of mean values of measuring the LED in LED group, can also be that the colour gamut that obtains LED group from supplier distributes, and approximation using the geometric center of this colour gamut or the chromaticity coordinates of center of gravity as the mean value of chromaticity coordinates statistics.
In order to obtain the chromaticity coordinates average of a said n LED group, can adopt following two kinds of modes to choose.
First kind of way is: from the chromaticity coordinates average of predetermined LED group, choose the chromaticity coordinates average of n LED group, and this n LED group makes to expect the region that chromaticity coordinates is positioned at chromaticity coordinates average that this n LED organize and surrounds (be designated hereinafter simply as n LED group meet the expectation chromaticity coordinates).Detailed process is:
First, manufacturing equipment obtains the chromaticity coordinates average of all predetermined LED groups.For example, input to manufacturing equipment by external input unit; The chromaticity coordinates average of all predetermined LED groups also can be pre-stored in the memory of manufacturing equipment, and manufacturing equipment directly reads the chromaticity coordinates average of all LED groups from memory.All predetermined LED groups can refer to stock's LED group, also can refer to the LED group that supplier can provide.
Secondly, from the chromaticity coordinates average of all predetermined LED group obtained, choose the chromaticity coordinates average of n LED group, make to expect that chromaticity coordinates is positioned at the region that chromaticity coordinates average that this n LED organize surrounds.The n here can be predetermined value, for example n=3.The process of choosing can adopt various ways, for example: first choose arbitrarily n-1 LED group, then chosen and can be made meet the expectation n LED group of chromaticity coordinates of n LED group by the mode of trial and error; If choose less than n suitable LED group, reselect n-1 LED group, then choose n LED group by trial and error mode, the like, all carried out trial and error until choose the combination of suitable LED group or all LED group.
The n here can also be uncertain value.For example choosing process can be: the value that n is first set is 2, recycles the above-mentioned process of choosing, and attempts choosing 2 LED groups of the chromaticity coordinates that meets the expectation; The chromaticity coordinates if any 2 LED group all can not meet the expectation, resetting n is 2+1=3, again utilizes the above-mentioned process of choosing, and attempts choosing the LED group of 3 chromaticity coordinatess that meet the expectation; The like, be the quantity of the predetermined LED group chromaticity coordinates that still can not meet the expectation until choose some LED groups of the chromaticity coordinates that meets the expectation or n is set.
Preferably, for conventional some expectation chromaticity coordinatess, can calculate in advance the chromaticity coordinates average of the some LED groups that meet respectively these some expectation chromaticity coordinatess, and the corresponding relation of the chromaticity coordinates average of these some expectation chromaticity coordinatess and these some LED groups is kept in the storage device of control device in advance.Now, step S12 is specifically as follows the chromaticity coordinates average that directly reads the n corresponding with expecting chromaticity coordinates LED group from storage device.
It is to be noted, owing to being subject to predetermined LED group quantity and the restriction of colour gamut distribution, first kind of way may can not chosen n the LED group satisfying condition, now, except finding n the LED group satisfying condition by increasing one or more LED groups, can also realize by the second way below.
The second way is first to determine n chromaticity coordinates, make to expect that chromaticity coordinates is positioned at the region that this n chromaticity coordinates surrounds, determine n the colour gamut take this n chromaticity coordinates as chromaticity coordinates average respectively, this colour gamut coverage is no more than 3 step MacAdam's ellipses again, and detailed process comprises:
(1) determine n chromaticity coordinates, make to expect that chromaticity coordinates is positioned at the region that this n chromaticity coordinates surrounds.For example, the process of choosing can adopt trial-and-error method: n-1 chromaticity coordinates is set arbitrarily, then chosen and can be made to expect that chromaticity coordinates is positioned at n the chromaticity coordinates in the region that n chromaticity coordinates surround by the mode of trial and error.Different from first kind of way, do not need to be here limited to from some predetermined LED groups and select n chromaticity coordinates, but can in the scope of whole chromatic diagram, choose n chromaticity coordinates.
(2) determine n the colour gamut take this n chromaticity coordinates as chromaticity coordinates average respectively, chromaticity coordinates average and colour gamut that this definite n chromaticity coordinates and colour gamut are organized as n LED respectively.The size of the colour gamut is here selected as required, does not need identical.
Then can be by searching stock or obtaining n the LED group take chromaticity coordinates average definite step (2) and colour gamut as chromaticity coordinates average and colour gamut from modes such as supplier's orders.
Step S13: the total quantity m that obtains the required LED of LED array device 0.
The total quantity of required LED is to be determined by the lumen number of LED array device etc., and sets according to actual needs the total quantity m of the required LED of this LED array device 0can input this total quantity m by staff or external input unit 0give above-mentioned manufacturing equipment; The total quantity m of the required LED of LED array device 0also can be pre-stored in the memory of above-mentioned manufacturing equipment, manufacturing equipment directly reads this total quantity m from memory 0.
Step S14: obtain the quantity of every group of required LED in n LED group, make m 1individual chromaticity coordinates is (x 1, y 1) LED, m 2individual chromaticity coordinates is (x 2, y 2) LED ... m iindividual chromaticity coordinates is (x i, y i) LED ... m nindividual chromaticity coordinates is (x n, y n) the chromaticity coordinates of mixed light of LED for expecting chromaticity coordinates, and m 1+ ... + m i+ ... + m n=m 0, 1≤i≤n, 1≤m i≤ m 0, wherein (x i, y i) be the chromaticity coordinates average of i LED group colour gamut.
For convenience of calculation, we can regard n LED group as n LEDs, and the chromaticity coordinates average of n LED group are regarded as to the chromaticity coordinates of this n LEDs.Utilize said n LEDs to calculate the brightness ratio that can obtain n LEDs, i.e. the brightness ratio of n LED group.By the brightness ratio of acquired n LED group, add the brightness average ratio of single LEDs that n LED organize and n LED and organize the total quantity of required LED, can obtain each LED and organize the quantity of required LED.
Because differing, the chromaticity coordinates of the every LEDs in each LED group establishes a capital the chromaticity coordinates average that equals this LED group, so obviously have error by utilizing n LED that n LEDs calculates to organize required LED quantity, but because the coverage of the colour gamut of each LED group is no more than 3 step MacAdam's ellipses, the chromaticity coordinates of the emergent light of the LED array device that therefore this error causes departs from expects that chromaticity coordinates can not exceed 3 step MacAdam's ellipses yet, within the scope of acceptable.
Specifically, in n LED group, the acquisition process of the quantity of every group of required LED can comprise:
1, the chromaticity coordinates average of the n having obtained a LED group is defined as to the chromaticity coordinates of n LEDs, calculates the brightness ratio of this n LEDs, the chromaticity coordinates that makes the mixed light of this n LEDs is expectation chromaticity coordinates (x 0, y 0).
According to colorimetry theory, for two above LED, be positioned at the chromaticity coordinates of any point in the region that the chromaticity coordinates of this more than two LED surrounds, necessarily can be mixed to get by these two above LED the chromaticity coordinates (x of its mixed light with certain brightness ratio 0, y 0) computing formula be:
x 0 = &Sigma; i Y i &CenterDot; x i / y i &Sigma; i Y i / y i y 0 = &Sigma; i Y i &Sigma; i Y i / y i , Wherein Y irepresent the lumen number of i LEDs, i.e. its brightness.
According to this formula, due to (x 0, y 0), (x i, y i) known, can calculate accurately Y 1, Y 2y iy nratio.In practice, also can not use above-mentioned formula to calculate but use experience formula is estimated.For example a kind of empirical equation is, the ratio of the brightness of the LED of various chromaticity coordinatess equals various chromaticity coordinatess apart from the inverse of the ratio of the distance of expecting chromaticity coordinates.The benefit of field experience formula is to reduce operand, is being widely used for the less demanding occasion of color accuracy.
2, obtain the ratio of the mean flow rate of single LEDs in each LED group.
The mean flow rate of single LEDs of each LED group can obtain by statistical average after the brightness of each LED in directly measuring every group, also can directly obtain from suppliers.If it should be noted that not the driving power difference (this is also common in practice) of LED on the same group, need the mean flow rate of single LEDs of each LED group need under real work driving power, measure acquisition.For the less demanding occasion of color accuracy, can think that the brightness of LED of different LED group is identical, the ratio of the mean flow rate of single LEDs of n LED group is 1, can omit this step, calculates thereby simplify.
3, the brightness ratio of group using the brightness ratio of the n LEDs having obtained as n LED, and organize the total quantity m of required LED in conjunction with n LED 0and the ratio of the brightness average of single LEDs of the n having obtained LED group, calculate each LED and organize the quantity of required LED.
For each LED group, its brightness equals the product of the mean flow rate of a number and single LEDs, the brightness ratio of the n calculating in step 1 LED, can think the brightness ratio of corresponding n LED group, therefore organize the total quantity m of required LED according to the ratio of the mean flow rate of single LEDs of different LED group and n LED 0, can calculate the ratio of the LED quantity of each LED group, and then organize the total quantity m of required LED in conjunction with n LED 0, i.e. m 1+ ... + m i+ ... + m n=m 0, can simple computation go out m 1, m 2m im n.
What deserves to be explained is, the required LED quantity of the each LED group being calculated by this step may not be integer, now, in the situation that chromaticity coordinates accuracy requirement is not high, can the required LED quantity of each LED group is rounded or be rounded up.Certainly can also revise by changing the drive current of one of them LED in LED group the chromaticity coordinates of mixed light, it is 3.4 that a for example LED organizes required LED number, in this LED group, 3 LED can be normal drive current 0.4 for 1 LED of normal drive current, or the drive current of 4 LED is all reduced to the 3.4/4=85% of normal drive current, now the chromaticity coordinates of mixed light relatively approaches and expects chromaticity coordinates.
Step S15: obtain the LED of each group of requirement in the colour gamut of the each LED group in the n having obtained a LED group, and the LED of this each group requirement is arranged into LED array device.
According to the result of calculation in step S14, in each LED group, obtain the LED of respective numbers, can be to choose at random in every group, can be also to choose according to ad hoc rules.
Modal arrangement mode is that these LED are distributed on the lamp panel of a plane and form a LED array.Certainly curved surface lamp panel also exists in practice, does not limit herein.
In actual production, after LED being arranged in to lamp panel formation LED array and being fixed on lamp panel, LED array can be electrically connected to power supply source, can form a LED array device.Further, can also pass through assembling optical element, heat dissipation element and shell, form a more perfect LED array device.The assembling process is here the known technology of this area, just repeats no more at this.
In said method, obtain expecting the light output of chromaticity coordinates by the mixed light of n LED group; Because the color coordinates distribution of the LED of each group is in the scope of 3 step MacAdam's ellipses, therefore the chromaticity coordinates of its mixed light is also in 3 step MacAdam's ellipses of expectation chromaticity coordinates, and therefore the difference between the chromaticity coordinates of the emergent light of LED array device and expectation chromaticity coordinates also can not discovered by human eye.
Like this, the precision of the chromaticity coordinates of mixed light just depends on the chromaticity coordinates precision of each group LED group, and do not limit for the color distinction of the LED between group and group, do not require and as prior art, make the LED color of all groups all concentrate on and expect near chromaticity coordinates.Obviously, with respect to the precision of controlling all groups of LED chromaticity coordinatess, the precision of controlling one group of LED chromaticity coordinates is much easier, even in the time buying LED, just can be divided into groups according to chromaticity coordinates by supplier, and the color gamut of the corresponding 3 step MacAdam's ellipses of each group.Therefore method of the present invention has reduced the cost and the control difficulty that obtain particular color emergent light.
On same lamp panel, in the time that the chromaticity coordinates of different LED group has big difference, when the exiting surface of eye-observation LED array device, can find that the color distribution of exiting surface is mixed and disorderly, therefore preferably, step S12 is specially: obtain the chromaticity coordinates average of the LED group of n, to make to expect that chromaticity coordinates is positioned at the region that the chromaticity coordinates average of this n LED group surrounds, and the chromaticity coordinates of all LED of organizing of this n LED is all positioned at 6 step MacAdam's ellipses of this expectation chromaticity coordinates.
In addition, for further reduce LED array device emergent light chromaticity coordinates and expect the difference between chromaticity coordinates, preferably, the coverage of the zones of different of the covering of the colour gamut of each LED group is in a step MacAdam's ellipse, and now human eye is not aware of the chromaticity coordinates and the difference of expecting chromaticity coordinates of the emergent light of LED array device completely.
In order to make the bright dipping of LED array device more even, preferably, the step that in step S15, the LED of this each group requirement is arranged into LED array device comprises: the LED of each LED group is uniformly distributed, and the LED of different LED group is interspersed.
For the ease of understanding, with a concrete application scenarios, the manufacture method of the LED array device in above-described embodiment is described below, particularly:
Fig. 2 is the schematic flow sheet of the another embodiment of the manufacture method of LED array device of the present invention, and manufacturing equipment is manufactured the process of LED array device according to stock's LED, and as shown in Figure 2, its step is as follows,
S21, obtain the expectation chromaticity coordinates (x of the emergent light of LED array device 0, y 0).
Expect chromaticity coordinates (x 0, y 0) be pre-stored in the memory of above-mentioned manufacturing equipment, manufacturing equipment directly reads this expectation chromaticity coordinates (x from memory 0, y 0).
S22, from the chromaticity coordinates average of 5 predetermined LED groups, manufacturing equipment is chosen the chromaticity coordinates average of n LED group, and this n LED group makes to expect that chromaticity coordinates is positioned at the region that chromaticity coordinates average that this n LED organize surrounds.
Fig. 3 is the colour gamut of 5 LED groups predetermined in embodiment illustrated in fig. 2 and the schematic diagram of expecting the mode of choosing that chromaticity coordinates and 2 LED organize.As shown in Figure 3, the chromaticity coordinates average of a LED group colour gamut is (x 1, y 1), the chromaticity coordinates average of the 2nd LED group colour gamut is (x 2, y 2), the chromaticity coordinates average of the 3rd LED group colour gamut is (x 3, y 3), the chromaticity coordinates average of the 4th LED group colour gamut is (x 4, y 4), the chromaticity coordinates average of the 5th LED group colour gamut is (x 5, y 5).
Mode when this sentences n in the first kind of way of step S12 and is uncertain value is that example describes.First attempt choosing 2 LED groups that satisfy condition, make to expect chromaticity coordinates (x 0, y 0) on the line between the chromaticity coordinates average of these 2 LED group colour gamuts.If the line between the chromaticity coordinates average of 2 LED groups is regarded as to an one dimension region here, expects chromaticity coordinates (x 0, y 0) be positioned at this one dimension region.
The method of choosing 2 LED groups has a lot, and for example trial-and-error method is attempted the combination of all possible 2 LED group, thereby selected qualified combination.As can be seen from Figure 2, in predetermined five groups, do not have qualified combination, therefore can attempt increasing be used for mixed light LED group number or utilize the second way in abovementioned steps S12.
Here be used for the LED group number of mixed light as example to increase: attempt selecting 3 LED groups, make to expect that chromaticity coordinates is positioned at the region that the chromaticity coordinates average of these 3 LED group colour gamuts surrounds.As shown in Figure 4, can choose a LED group, the 2nd LED group and the 4th LED group, expect chromaticity coordinates (x 0, y 0) be positioned at the chromaticity coordinates average (x of a LED group colour gamut 1, y 1), the chromaticity coordinates average (x of the 2nd LED group colour gamut 2, y 2) and the chromaticity coordinates average (x of the 4th LED group colour gamut 4, y 4) in the region that surrounds.
S23, obtain the total quantity m of the required LED of LED array device 0.
The total quantity m of the required LED of LED array device 0be pre-stored in the memory of above-mentioned manufacturing equipment, manufacturing equipment directly reads this total quantity m from memory 0.
S24, obtain the quantity of every group of required LED in n LED group, make m 1individual chromaticity coordinates is (x 1, y 1) LED, m 2individual chromaticity coordinates is (x 2, y 2) LED ... m iindividual chromaticity coordinates is (x i, y i) LED ... m nindividual chromaticity coordinates is (x n, y n) the chromaticity coordinates of mixed light of LED for expecting chromaticity coordinates, and m 1+ ... + m i+ ... + m n=m 0, 1≤i≤n, 1≤m i≤ m 0, wherein (x i, y i) be the chromaticity coordinates average of i LED group.
According to step S22, manufacturing equipment has obtained 3 LED groups, the n=3 in this step.Calculate each LED below and organize required quantity, detailed process is:
1, the chromaticity coordinates average of 3 LED groups having obtained is defined as to the chromaticity coordinates of 3 LEDs, calculates the brightness ratio of this 3 LEDs, the chromaticity coordinates that makes the mixed light of 3 LEDs is expectation chromaticity coordinates (x 0, y 0).
The one LED group, the 2nd LED group and the 4th LED group can be regarded 3 LEDs of the chromaticity coordinates average that in LED group, chromaticity coordinates is colour gamut as.According to colorimetry theory, be respectively (x for three chromaticity coordinatess 1, y 1), (x 2, y 2), (x 3, y 3) LED, the expectation chromaticity coordinates (x of its mixed light 0, y 0) computing formula be:
x 0 = Y 1 &CenterDot; x 1 / y 1 + Y 2 &CenterDot; x 2 / y 2 + Y 2 &CenterDot; x 2 / y 2 Y 1 / y 1 + Y 2 / y 2 + Y 3 / y 3 y 0 = Y 1 + Y 2 + Y 3 Y 1 / y 1 + Y 2 / y 2 + Y 3 / y 3 , Wherein Y irepresent the lumen number of i LEDs.
Due to known (x 0, y 0), (x 1, y 1), (x 2, y 2), (x 3, y 3), calculating by above-mentioned formula, the lumen that can obtain three LEDs is counted Y 1, Y 2, Y 3ratio.
2, obtain the ratio of the mean flow rate of single LEDs of 3 LED groups.
The mean flow rate of single LEDs of 3 LED groups having obtained is to obtain from supplier, and is stored in the memory of manufacturing equipment, and Preparation equipment obtains from holder.
3, the brightness ratio of LED group using the brightness ratio of the n LEDs having obtained as described n, and organize the total quantity m of required LED in conjunction with the brightness average ratio of single LEDs of 3 LED groups and 3 LED 0, calculate each LED and organize the quantity of required LED.
For three LED groups, can extrapolate according to the ratio of lumen number of three LED groups and the ratio of single brightness LED the number ratio that three LED organize, and then in conjunction with m 1+ m 2+ m 3=m 0, can calculate a LED group, the 2nd LED group and the 4th LED and organize required LED quantity m 1, m 2and m 3, the quantity here has unique solution.Similarly, for by the above-mentioned non-integer solution calculating, can round or change drive current it and regulate.
In the colour gamut of S25, each LED group in 3 LED groups having obtained, obtain the LED of each group of requirement, and LED of this each group requirement is arranged into LED array device.
Manufacturing equipment, from above-mentioned 3 LED groups that obtain, is chosen arbitrarily the LED of requirement, and all LED is arranged on same lamp panel.The follow-up process such as fixing just repeats no more at this.
The present embodiment has been chosen 3 different LED groups, by obtaining 3 LED groups, the chromaticity coordinates average of the colour gamut of organizing with these 3 LED is regarded the chromaticity coordinates of three kinds of corresponding LED as, owing to expecting that chromaticity coordinates is positioned at the region that the line of the chromaticity coordinates of these 3 kinds of corresponding LED surrounds, therefore exist 3 kinds of corresponding LED of certain brightness to make three's the chromaticity coordinates of mixing output light for expecting chromaticity coordinates.According to the total quantity of the required LED of LED array device, just can determine every group of corresponding LED quantity corresponding to LED group.Because the coverage of the colour gamut of different LED group is all no more than 3 step MacAdam's ellipses, the chromaticity coordinates of the mixed light of the one LED group, the 2nd LED group and the 4th LED group can not exceed in the 3 step MacAdam's ellipses of expecting chromaticity coordinates yet, and therefore the difference between the chromaticity coordinates of the emergent light of LED array device and predetermined color coordinate also can not discovered by human eye.
Hold intelligiblely, LED array device can also be chosen three above LED groups and arrange, and can play equally the effect of the emergent light chromaticity coordinates of adjusting LED array device, utilizes more fully the LED of multiple color classifications simultaneously.In the time that LED array device can be chosen more than three LED, the quantity of each group may have two or more selections, and (stock of for example LED) selects more neatly as required.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
The foregoing is only embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (8)

1. a manufacture method for LED array device, is characterized in that, comprising:
Obtain the expectation chromaticity coordinates (x of the emergent light of described LED array device 0, y 0);
Obtain the chromaticity coordinates average of n LED group, to make described expectation chromaticity coordinates (x 0, y 0) line that is positioned at the chromaticity coordinates average of this n LED group surrounds region, n is greater than 1 integer, every group of chromaticity coordinates average in each LED group colour gamut the assembly average of chromaticity coordinates a little, the colour gamut of this n LED group covers respectively the zones of different of chromatic diagram, and the coverage in each described region is no more than 3 step MacAdam's ellipses;
Obtain the total quantity m of the required LED of described LED array device 0;
The quantity of obtaining every group of required LED in n described LED group, makes m 1individual chromaticity coordinates is (x 1, y 1) LED, m 2individual chromaticity coordinates is (x 2, y 2) LED ... m iindividual chromaticity coordinates is (x i, y i) LED ... m nindividual chromaticity coordinates is (x n, y n) the chromaticity coordinates of mixed light of LED for expecting chromaticity coordinates, and m 1+ ... + m i+ ... + m n=m 0, 1≤i≤n, 1≤m i≤ m 0, wherein m ibe the quantity that i LED organizes required LED, (x i, y i) be the chromaticity coordinates average of i LED group colour gamut;
In the colour gamut of the each LED group in the n having obtained a LED group, obtain the LED of each group of requirement, and the LED of this each group requirement is arranged into LED array device.
2. the manufacture method of LED array device according to claim 1, is characterized in that: the colour gamut coverage of each described LED group is in a step MacAdam's ellipse.
3. the manufacture method of LED array device according to claim 1, is characterized in that: the chromaticity coordinates average of the colour gamut of described LED group is the geometric center point of colour gamut or the chromaticity coordinates of focus point of described LED group.
4. the manufacture method of LED array device according to claim 1, is characterized in that, described in obtain the chromaticity coordinates average of n LED group, the step that surrounds region with the line that makes described expectation chromaticity coordinates be positioned at the chromaticity coordinates average that this n LED organize comprises:
Obtain the chromaticity coordinates average of all predetermined LED groups;
From the chromaticity coordinates average of all predetermined LED group obtained, choose the chromaticity coordinates average of n LED group, make to expect that chromaticity coordinates is positioned at the region that chromaticity coordinates average that this n LED organize surrounds.
5. the manufacture method of LED array device according to claim 1, is characterized in that, described in obtain the chromaticity coordinates average of n LED group, the step that surrounds region with the line that makes described expectation chromaticity coordinates be positioned at the chromaticity coordinates average that this n LED organize comprises:
Determine n chromaticity coordinates, make described expectation chromaticity coordinates be positioned at the region that this n chromaticity coordinates surrounds;
Determine n the colour gamut take this n chromaticity coordinates as chromaticity coordinates average respectively, chromaticity coordinates average and colour gamut that this definite n chromaticity coordinates and colour gamut are organized as described n LED respectively.
6. the manufacture method of LED array device according to claim 1, is characterized in that, described in obtain the quantity of every group of required LED in n described LED group, make m 1individual chromaticity coordinates is (x 1, y 1) LED, m 2individual chromaticity coordinates is (x 2, y 2) LED ... m iindividual chromaticity coordinates is (x i, y i) LED ... m nindividual chromaticity coordinates is (x n, y n) the chromaticity coordinates of mixed light of LED for expecting chromaticity coordinates, and m 1+ ... + m i+ ... + m n=m 0step comprise:
The chromaticity coordinates average of the n having obtained a LED group is defined as to the chromaticity coordinates of n LEDs, and calculates the brightness ratio of this n LEDs, the chromaticity coordinates that makes the mixed light of this n LEDs is expectation chromaticity coordinates (x 0, y 0);
Obtain the ratio of the mean flow rate of single LEDs in each described LED group;
The brightness ratio of a LED group using the brightness ratio of the n LEDs having obtained as described n, and organize the total quantity m0 of required LED and the ratio of the brightness average of single LEDs of n LED group of having obtained in conjunction with n LED, calculate each described LED and organize the quantity of required LED.
7. the manufacture method of LED array device according to claim 1, is characterized in that, described in obtain the chromaticity coordinates average of n LED group, the step that surrounds region with the line that makes described expectation chromaticity coordinates be positioned at the chromaticity coordinates average that this n LED organize comprises:
Obtain the chromaticity coordinates average of n LED group, the region surrounding with the chromaticity coordinates average that makes described expectation chromaticity coordinates be positioned at this n LED group, and the chromaticity coordinates of all LED of this n LED group is all positioned at 6 step MacAdam's ellipses of this expectation chromaticity coordinates.
8. the manufacture method of LED array device according to claim 1, is characterized in that, the step that the described LED by this each group requirement is arranged into LED array device comprises:
The LED of each described LED group is uniformly distributed, and the LED of described difference LED group is interspersed.
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