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[rtrqdc69]

Led which are generally led chip (device) production commercial use of rapid detection methods, but with the practical application of led lighting in the final state of reference do not haveto.the second detection method is the detection of the led module is installed on the device, it may take a fixed heat sink (temperature control may also have the base function), to exert its claim to the work of the led current, the traditional light source detection methods, writing board until the led is in thermal equilibrium and then start measuring its optical parameters. this approach appears tighter, but in fact.
in relation to the main content of this draft for approval to introduce the standards established by the terms of the whole story, the product requirements and test requirements for the majority of peer reference. first, the output voltage and current one, starting and control devices connected within the requirements of led-related energy storage and output capacitor connected at startup or when the led,led neon sign resulting in a short period of surge voltage or surge current, surge capacity of these unchecked, may result in shortened life span of led or damage.
such led watch from the output control device in, led signs output impedance has a constant voltage output than the type of led control to high, but significantly lower than control led current output-type controls. such circuits can be connected led work-limiting impedance of the smaller led can work.