Referred to as the LED light of hope, since 1964, has grown to popularize lighting era, its energy saving, environmental protection, high brightness, small power consumption, long life, impact resistance and other advantages, foreground is very wide; In the beginning stages of indoor lighting, and its inherent shortcomings, mainly in the following aspects:
1, the inconsistency problems:
Theory of LED is a light-emitting diode, and virtually all the LED’s performance are difference, the production process of each manufacturer is not consistent, vary widely, even is the same manufacturer process are in different time; Different manufacturers use semiconductor of the purity of raw materials there are differences, which makes the LED luminous intensity and the drive current is not completely the same, the differences between the resistance to over current capacity and fever is naturally different. Packaging technology and packaging material are different, make the overall heat capacity is not the same, and composite material thermal peng expansion and heat dissipation problems. It is not hard to see from this, LED light-emitting diode in the short term there are still a lot of differences between individuals, if each lamp use only one LED, good control. Such as TV, DVD, power indicator light; When we made of LED lighting lamps and lanterns, is not the LED with a single, but with multiple, hundreds of thousands of LED array access circuit, because of difference of the LED there is always a first damage, when there are several broken (usually short circuit), will make current increases and damage to the other leds. This is not consistent with the results, is also one of the factors that restrict its development.