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Evaluation of the thermal performance of LED general use of thermal resistance, case temperature, junction temperature and other parameters indicated. Applications for the different LED optical performance from consideration because, as shown with the LED, the visual focus is the visual effects, so the color temperature and color rendering index did not even relevant? Special requirements. In contrast is the white LED lighting is very focused correlated color temperature and color rendering index, because it is the atmosphere and lighting effects to create an important indicator, but the color purity and dominant wavelength generally do not have special requirements.
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Semiconductor light emitting diodes for electrical characteristics of electrical properties from the LED to consider LED's electrical characteristics of PN junction is one-way non-linear electrical properties, low voltage drive and the characteristics of static sensitive. Unlike traditional sources of electrical characteristics, so the main measurement parameters including forward drive current, forward voltage, reverse leakage current, reverse breakdown voltage and electrostatic sensitivity, etc.. LED light source for the body of biological or radiation safety considerations because LED is a narrow beam, high-brightness light emitting devices, the radiation may be human retinal?
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