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What is the principle of LED lamp?

  LED(Light Emitting Diode),The utility model relates to a light emitting diode, which is a solid state semiconductor device capable of converting electric energy into visible light. The heart of LED is a semiconductor wafer, one end of which is attached to a support, one end is a negative electrode, and the other end is connected with the positive pole of the power supply, so that the whole chip is encapsulated by epoxy resin.

The semiconductor chip is made up of two parts, one part is the P type semiconductor, in which the hole is dominant, the other end is the N type semiconductor. But when these two semiconductors are connected, they form a P-N junction. When the current through the wire acting on the chip, the electrons will be pushed to the P area, in the P area of the electronic and hole compound, and then will be issued in the form of photons of energy, which is the principle of LED light emitting. The wavelength of light is the color of light, which is determined by the material that forms the P-N junction.