WANG Li-dong, MAO Zhen-hua, NI Wei. Photoelectric parameter measurement system based on Cortex-M3 for LEDs[J]. Editorial Office of Optics and Precision Engineering, 2014,22(4): 856-862
WANG Li-dong, MAO Zhen-hua, NI Wei. Photoelectric parameter measurement system based on Cortex-M3 for LEDs[J]. Editorial Office of Optics and Precision Engineering, 2014,22(4): 856-862 DOI: 10.3788/OPE.20142204.0856.
According to the demands of Light Emitting Diode(LED) separation equipment for the photoelectric parameter measurement system
this paper describes a self-designed fast LED photoelectric parameter measurement system based on Cortex-M3 (hereinafter referred to as M3). The system consists of an optical parameter detection module (homemade spectrometer)
an electrical test module and a display module. The optical parametric module uses the M3 as the main processor to acquire the spectral data and then gets the actual chromatic parameters to pass to the same M3-based processor module of electrical parameters. It greatly improves the LED parameter measuring speed and performance. Finally
without control of LED sorting machenisms
the designed LED photoelectric parameter measurement system was realized experimetally
in which the electrical testing period is less than 31 ms
optical testing period can be as small as 10 ms
and the deviation in consistency of chromaticity coordinate is less than 0.002 5%.
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references
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