CN105457909A - LED light splitting method - Google Patents
LED light splitting method Download PDFInfo
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- CN105457909A CN105457909A CN201510899922.5A CN201510899922A CN105457909A CN 105457909 A CN105457909 A CN 105457909A CN 201510899922 A CN201510899922 A CN 201510899922A CN 105457909 A CN105457909 A CN 105457909A
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- spectrogram
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3425—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C2301/00—Sorting according to destination
- B07C2301/0008—Electronic Devices, e.g. keyboard, displays
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Abstract
An LED light splitting method comprises the following steps of firstly, primary screening, wherein LEDs at the same color temperature are screened out according to the X/Y value on a CIE1931 chromaticity diagram; and secondly, secondary screening, wherein spectrum charts of the LEDs at the same color temperature are guided out and then are compared with standard spectrum charts, and the spectrum charts with the similarity meeting the requirement are judged to be qualified products. In the first step, the same batch of LEDs at the same color temperature can be screened out; and in the second step, further screening is carried out, and the same batch of LEDs at the same color temperature and in the same emitted light color are screened out. The LED products with the higher consistency of parameters are finally obtained.
Description
Technical field
The present invention relates to LED light-splitting method, especially based on the sorting that the LED of same batch that colour temperature is identical carries out.
Background technology
Existing light-splitting method: just the X/Y value on CIE1931 chromatic diagram is screened, carry out contrast by utilizing X/Y value and standard x/Y value on test chromatic diagram to determine whether to meet color temperature value requirement, it is mainly tested color temperature value, but in fact under same color temperature, due to the difference of chip and other parameter of fluorescent material, also its color can be caused different, so in the LED of same batch of identical colour temperature, likely there is difference in glow color, be mainly reflected in the difference on LED light spectrogram, as shown in Figure 1.Some is concerning LED emission uniformity requires higher occasion, and current light-splitting method obviously can not meet the demands.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of LED light-splitting method, and the LED glow color uniformity sorted out is higher.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of LED light-splitting method, comprises the following steps:
(1) screen: the spectrogram of deriving the identical LED of every colour temperature, then compares with standard spectrum diagram, if similarity meets a preset requirement, be then judged as a grade products.
Step of the present invention (1) utilizes the spectrogram of tested product and standard spectrum diagram to compare, and according to the preset requirement of setting, judges the classification of product, so the LED product that the parameters uniformity finally obtained is higher.
As improvement, in step (1) front needs, Preliminary screening is carried out to LED, Preliminary screening: filter out the identical LED of colour temperature according to the X/Y value on CIE1931 chromatic diagram, thus first can filter out the identical LED of same batch of colour temperature, and then carry out frequency spectrum similarity comparison, thus the parameters such as colour temperature and color uniformity can be guaranteed further, and computational efficiency can be improved.
As improvement, in described step (1), light splitting machine is utilized to derive the spectrogram of LED, the function of spectrogram in existing light splitting machine, so without the need to additionally increasing equipment to carry out secondary sorting, only software program need be utilized can to realize the similarity-rough set of spectrogram.
As improvement, the spectrum comparative approach of described step (1):
(1.1) LED light spectrogram and standard spectrum diagram are saved as picture format;
(1.2) being placed in the same coordinate system by LED light spectrogram and standard spectrum diagram, is benchmark with abscissa, compares LED light spectrogram and the value of standard spectrum diagram corresponding ordinate under same abscissa, then draws Similarity value.Utilize the form of picture to carry out similarity-rough set, conveniently carry out similarity-rough set.
As improvement, the spectrum comparative approach of described step (1):
(1.1) spectral resolution is become multistage curve;
(1.2) similarity-rough set is carried out to each section of curve.By spectral resolution multistage, carry out Similarity Measure respectively, more can save computing time.
As improvement, the spectrogram of white light LEDs comprises blue chip luminescent waveform and light-emitting phosphor waveform, blue chip luminescent waveform corresponding with standard spectrum diagram for blue chip luminescent waveform in LED light spectrogram is carried out similarity-rough set, and the light-emitting phosphor waveform that the blue phosphor luminescent waveform in LED light spectrogram is corresponding with standard spectrum diagram carries out similarity-rough set.By the similarity of spectrogram chips and fluorescent material chip being contrasted respectively, thus determine the difference of the color that chip or fluorescent material cause further.
The beneficial effect that the present invention is compared with prior art brought is:
Step of the present invention (1) utilizes the spectrogram of tested product and standard spectrum diagram to compare, and according to the preset requirement of setting, judges the classification of product, so the LED product that the parameters uniformity finally obtained is higher.Light-splitting method of the present invention utilizes light-dividing device intermediate frequency spectrogram to the sorting of product, and separating effect is obvious, solves LED light-splitting method in prior art and to exist and cannot by the problem of cognition.
Accompanying drawing explanation
Fig. 1 is the spectrogram of tested LED product.
Fig. 2 is the LED light spectrogram that light-splitting method sorting of the present invention obtains.
Fig. 3 is the spectrogram of white light LEDs.
Detailed description of the invention
Below in conjunction with Figure of description, the invention will be further described.
Embodiment 1
A kind of LED light-splitting method, comprises the following steps:
(1) screen: the spectrogram of deriving every LEDs, then compares with standard spectrum diagram, if similarity meets a preset requirement (as being greater than preset value 98%), be then judged as a grade products.If similarity meets another preset requirement (as in preset range 96%-98%), be then judged as another grade products, standard spectrum diagram imports in light splitting machine in advance.Now by spectrogram determination colour temperature and the isoparametric uniformity of glow color.
Further, step (1) specifically comprises: Preliminary screening: filter out the identical LED of colour temperature according to the X/Y value on CIE1931 chromatic diagram; Screening: the spectrogram of deriving the identical LED of every colour temperature, then compare with standard spectrum diagram, if similarity meets a preset requirement, then be judged as a grade products, this step first filters out the consistent product of colour temperature, then colour temperature homegeneous production is carried out frequency spectrum similarity analysis, thus can amount of calculation be reduced, improve the degree of accuracy of luminous parameters further.
Further, after step (1), this method comprises: the product type reading a grade products, the association of spectrogram corresponding for one grade products, product type and Similarity value is preserved, after Preset Time (can be the time of the complete needs of a collection of product selecting or 10 minutes of setting), and the spectrogram of this highest for Similarity value grade products is set as the standard spectrum diagram that this grade product type is corresponding, thus standard spectrum diagram can be upgraded according to often criticizing product actual conditions, more accurately can carry out sorting.
As shown in Figure 2, display is selected two qualified products (as series 1 and series 2) spectrogram, and concrete method is:
(1.1) LED light spectrogram and standard spectrum diagram are saved as picture format;
(1.2) LED light spectrogram and standard spectrum diagram are placed in the same coordinate system, take abscissa as benchmark, the relatively value of LED light spectrogram and standard spectrum diagram corresponding ordinate under same abscissa, then Similarity value is drawn, in the present embodiment, abscissa is frequency, and ordinate is relative intensity value, and Similarity value obtains being obtained by existing conventional similarity algorithm.
As shown in Figure 3, the spectrogram that display white light is corresponding, wherein 1 represents the waveform of light that chip sends, the waveform of the light sent after 2 expression fluorescent material are excited, for the sorting of white light LEDs, because existing white light is all formed by blue chip excitated fluorescent powder, so when to sorting white light LED, spectrogram all can present two crest figure, one is the waveform of the light that blue chip sends, another is the waveform that fluorescent material sends light, general is fluorescent material oscillogram at more than 495nm, so can with this section for separation relatively time, blue chip luminescent waveform corresponding with standard spectrum diagram for blue chip luminescent waveform in LED light spectrogram is carried out similarity-rough set, the light-emitting phosphor waveform that blue phosphor luminescent waveform in LED light spectrogram is corresponding with standard spectrum diagram carries out similarity-rough set, respectively the reason (mainly from chip or fluorescent material proportioning) that similarity-rough set more accurately determines to cause spectrum different is compared to chip and fluorescent material section.。
Step Preliminary screening of the present invention can filter out the identical LED of same batch of colour temperature; Step (1) is screened further, glow color in same batch of identical colour temperature is met a pre-conditioned LED and screens as a grade products; So the LED product that the parameters uniformity finally obtained is higher, and also can carry out graduation process to LED product.
Embodiment 2
A kind of LED light-splitting method, comprises the following steps:
(1) screen: the spectrogram of deriving every LEDs, then compares with standard spectrum diagram, if similarity meets a preset requirement (as being greater than preset value 98%), be then judged as a grade products.If similarity meets another preset requirement (as in preset range 96%-98%), be then judged as another grade products, standard spectrum diagram imports in light splitting machine in advance.Now by spectrogram determination colour temperature and the isoparametric uniformity of glow color.
Further, step (1) specifically comprises: Preliminary screening: filter out the identical LED of colour temperature according to the X/Y value on CIE1931 chromatic diagram; Screening: the spectrogram of deriving the identical LED of every colour temperature, then compare with standard spectrum diagram, if similarity meets a preset requirement, then be judged as a grade products, this step first filters out the consistent product of colour temperature, then colour temperature homegeneous production is carried out frequency spectrum similarity analysis, thus can amount of calculation be reduced, improve the degree of accuracy of luminous parameters further.
Further, after step (1), this method comprises: the product type reading a grade products, the association of spectrogram corresponding for one grade products, product type and Similarity value is preserved, after Preset Time (can be the time of the complete needs of a collection of product selecting or 10 minutes of setting), and the spectrogram of this highest for Similarity value grade products is set as the standard spectrum diagram that this grade product type is corresponding, thus standard spectrum diagram can be upgraded according to often criticizing product actual conditions, more accurately can carry out sorting.
As shown in Figure 2, concrete method is:
(1.1) spectral resolution is become multistage curve;
(1.2) similarity-rough set is carried out to each section of curve.
As shown in Figure 3, the spectrogram that display white light is corresponding, wherein 1 represents the waveform of light that chip sends, the waveform of the light sent after 2 expression fluorescent material are excited, for the sorting of white light LEDs, because existing white light is all formed by blue chip excitated fluorescent powder, so when to sorting white light LED, spectrogram all can present two crest figure, one is the waveform of the light that blue chip sends, another is the waveform sending light after fluorescent material is excited, general is fluorescent material oscillogram at more than 495nm, so can with this section for separation relatively time, blue chip luminescent waveform corresponding with standard spectrum diagram for blue chip luminescent waveform in LED light spectrogram is compared, the light-emitting phosphor waveform that blue phosphor luminescent waveform in LED light spectrogram is corresponding with standard spectrum diagram compares, respectively the reason (mainly from chip or fluorescent material proportioning) that similarity-rough set more accurately determines to cause spectrum different is compared to chip and fluorescent material section.。
Step Preliminary screening of the present invention can filter out the identical LED of same batch of colour temperature; Step (1) carries out the screening of spectrum similarity further, and LED identical for glow color in same batch of identical colour temperature is screened; So the LED product that the parameters uniformity finally obtained is higher, also can carry out graduation screening to different spectrum similarity degrees simultaneously.
Claims (7)
1.
a kind of LED light-splitting method, is characterized in that, comprise the following steps:
(1) screen: the spectrogram of deriving every LEDs, then compares with standard spectrum diagram, if similarity meets a preset requirement, be then judged as a grade products.
2.
a kind of LED light-splitting method according to claim 1, is characterized in that: in described step (1), utilizes light splitting machine to derive the spectrogram of LED.
3.
a kind of LED light-splitting method according to claim 1, is characterized in that: carry out Preliminary screening, Preliminary screening in step (1) front needs to LED: filter out the identical LED of colour temperature according to the X/Y value on CIE1931 chromatic diagram.
4.
a kind of LED light-splitting method according to claim 1, is characterized in that: the spectrum comparative approach of described step (1):
(1.1) LED light spectrogram and standard spectrum diagram are saved as picture format;
(1.2) being placed in the same coordinate system by LED light spectrogram and standard spectrum diagram, is benchmark with abscissa, compares LED light spectrogram and the value of standard spectrum diagram corresponding ordinate under same abscissa, then draws Similarity value.
5.
a kind of LED light-splitting method according to claim 1, is characterized in that: the spectrum comparative approach of described step (1):
(1.1) spectral resolution is become multistage curve;
(1.2) similarity-rough set is carried out to each section of curve.
6.
a kind of LED light-splitting method according to claim 1, it is characterized in that: the spectrogram of white light LEDs comprises blue chip luminescent waveform and light-emitting phosphor waveform, blue chip luminescent waveform corresponding with standard spectrum diagram for blue chip luminescent waveform in LED light spectrogram is carried out similarity-rough set, and the light-emitting phosphor waveform that the blue phosphor luminescent waveform in LED light spectrogram is corresponding with standard spectrum diagram carries out similarity-rough set.
7.
a kind of LED light-splitting method according to claim 1, it is characterized in that: after described step (1), also comprise: Similarity value corresponding to the model of a grade products read, the spectrogram of product and grade products is carried out association and preserves, and after Preset Time, using the standard spectrum diagram of the spectrogram of grade products the highest for described grade products Similarity value as described grade products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510899922.5A CN105457909A (en) | 2015-12-09 | 2015-12-09 | LED light splitting method |
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| CN201510899922.5A CN105457909A (en) | 2015-12-09 | 2015-12-09 | LED light splitting method |
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| CN105457909A true CN105457909A (en) | 2016-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106423915A (en) * | 2016-10-12 | 2017-02-22 | 合肥彩虹蓝光科技有限公司 | Method for color separation of test sorting |
| CN106840396A (en) * | 2016-12-13 | 2017-06-13 | 鸿利智汇集团股份有限公司 | A kind of spectrum test method of adjustment and testing and debugging device |
| CN109490750A (en) * | 2018-09-30 | 2019-03-19 | 广州市鸿利秉光电科技有限公司 | A kind of instrument and method detecting LED chip |
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Address after: 510890 Huadu District, Guangdong, Guangzhou Flower Town, SAST Road, No. 1, No. 1 Applicant after: Hongli Newell group Limited by Share Ltd Address before: 510890 Huadu District, Guangdong, Guangzhou Flower Town, SAST Road, No. 1, No. 1 Applicant before: Guangzhou Hongli Tronic Co., Ltd. |
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Application publication date: 20160406 |