Research Of LED's Multi-parameters Auto-measure Technology Base On LabVIEW

With the development of application of optoelectronic device, LED (light emitted diode) is used widely. Requirement of LED's quality was great improved; parameters of LED's are tested strictly. The way that LED's quality is decided by experience or simple tools can't be satisfied with market requirement. Many enterprises and institutes have developed some kinds of high level testing devices. This paper puts forward a new test method based on the analyses of the other testing schemes. The new scheme can satisfy with different users and application's requirement, and the same time which can improve the test precise, reliability and efficiency.This paper will focus on research and application key test technology and method about LED base on LabVIEW, including the principal, the method, the steps and the implement of test system of parameter testing, such as thermal performance parameters of spectrum and photometric parameters of LED, focus on realization of system software.Firstly, we introduced the LED parameter test principle and the test plan. Specially detailed elaboration LED spectrum parameter test principle, the method of increasing the test precision and the improvement way. Including divergence angle test method; Luminous intensity test principle, matters needing attention and enhancement test accuracy method.Proposed parameters measurements, the measurement steps and key based on theoretical analysis LED mainly spectral parameters and electrical parameters. Used spectrograph and linear-CCD to survey light signal, and used gathering card AC6010 and USB2004 to control, get signal data. Software is LabVIEW .Has completed the logarithm according to the gathering card driving, CCD signal gathering and gathering result preliminary processing. This instruments system may complete the LED spectrum and the luminosity parameter rapid survey, is suitable to the LED production test and the research test.Finally used the test equipment and the instrument done some test, giving produced test result data and so on the electrical parameter and spectrum parameter, analysis of measurement results might affect the factors and proposed the instrument improvement comment.