Abstract
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 M3as 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 31ms,optical testing period can be as small as 10ms,and the deviation in consistency of chromaticity coordinate is less than 0.002 5%.
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