Automatic Measurement of LED Colorimetric Parameters Based on LabVIEW
In order to accurately and automatically measure the light emitting diode（LED） colorimetric parameters,the design of a measurement system by adopting a high-performance spectrometer and looking-up table method was presented based on the LabVIEW.First,the data of the LED relative spectral power distr...
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| Published in | 东华大学学报（英文版） Vol. 28; no. 6; pp. 580 - 584 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan 430070,China
2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-5220 |
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| Summary: | In order to accurately and automatically measure the light emitting diode（LED） colorimetric parameters,the design of a measurement system by adopting a high-performance spectrometer and looking-up table method was presented based on the LabVIEW.First,the data of the LED relative spectral power distribution（SPD） were read by the spectrometer to measure LED chromaticity coordinate,and the slopes table were formed by the LED chromaticity coordinate and the equal stimulus point.Then,the CIE1931 chromaticity diagram was divided into 4 different regions to ensure the slopes table that had the character of monotonic decreasing.Finally,the LED dominant wavelength and purity were automatically calculated using the LabVIEW programs.The data of LEDs＇ colorimetric parameters have demonstrated that the measurement method in this paper can achieve higher precision result. |
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| Bibliography: | 31-1920/N light emitting diode （LED） ; colorimetric parameters; LabVIEW; spectral power distribution （SPD） ; looking-up table method LIN Wei-guo, LIU Yi, YANG Ming-zhong（ School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China） In order to accurately and automatically measure the light emitting diode（LED） colorimetric parameters,the design of a measurement system by adopting a high-performance spectrometer and looking-up table method was presented based on the LabVIEW.First,the data of the LED relative spectral power distribution（SPD） were read by the spectrometer to measure LED chromaticity coordinate,and the slopes table were formed by the LED chromaticity coordinate and the equal stimulus point.Then,the CIE1931 chromaticity diagram was divided into 4 different regions to ensure the slopes table that had the character of monotonic decreasing.Finally,the LED dominant wavelength and purity were automatically calculated using the LabVIEW programs.The data of LEDs＇ colorimetric parameters have demonstrated that the measurement method in this paper can achieve higher precision result. |
| ISSN: | 1672-5220 |