The heart of the LED is a semiconductor chip, which is divided into N-type and P-type parts. The P-type has a large number of electron holes, the N-type has a large number of electrons, and the two-stage connection forms a PN junction, wherein the P-end is mounted on the anode support. The N end is connected to the cathode by a gold wire.
When the lamp is energized, the N-type electrons are pushed to the P region. In the P region, the electrons are combined with the holes, and then the blue light is emitted, which is absorbed by the phosphor in the resin to emit visible light. It should be emphasized that LED lamps have been widely used in many fields for a few years, but until recently, GaN was used as the material of LED chips, and technology capable of emitting blue light was developed to enable LEDs to be used in the lighting industry. Because blue light is converted to visible light, it is the most efficient.