In the PN junction of some semiconductor materials, the superfluous energy will be released in the form of light when the injected minority carriers are combined with the majority carriers, thus directly converting electric energy into light energy. PN junction plus reverse voltage, a few carriers are difficult to inject, so it does not emit light. This kind of diode using injection electroluminescence principle is called light-emitting diode, commonly known as LED. When it is in the positive working state (that is, the two ends of the positive voltage), the current from the LED anode to the cathode, the semiconductor crystal will emit different colors of light from ultraviolet to infrared, the strength of the light is related to the current. At first, LED was used as an indicator light source for instruments and meters.
LED energy-saving lamp advantages and national policy support, make China’s LED energy-saving lamp contains a huge potential market. China’s LED energy-saving lamp industry needs to establish national standards as soon as possible to regulate the market; At the same time, we will carry out scientific research to improve the core competitiveness of the products and enrich the product series of LED energy-saving lamps applied in the household field.
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