In short, LED is optical semiconductor that converts electrical energy into light energy. Basically, LED has a cross-component structure of p-type semiconductor with positive(+) electrical properties and n-type semiconductor with negative(-) electrical properties. N-type with a large number of electrons and p-type with positive characteristics from a lot of holes, as opposite concept, are attached in a thin layer and when applied in forward direction, the current flows to the voltage of several colts and emits light. In other words, n-type electron moves and combines with p-type hole and it emits energy, which is mainly emitted in the form of heat or light and LED is the immediate production of the form of light.
