With semiconductor chips, it can convert electrical energy into visible light. Therefore, even if there is no filament, the LED can emit light. With the rapid development of science and technology, many tungsten filament lamps are beginning to be eliminated by the market, and gradually led lamps begin to replace tungsten filament lamps.
The semiconductor chip in the LED can convert electric energy to light. Therefore, the semiconductor chip is equivalent to a heart of LED. At both ends of the chip are positive and negative respectively. The positive is connected to the power supply, and the negative is attached to a support. Although the volume of a semiconductor wafer looks very small, it is composed of two parts. Some of them are p-type semiconductors, which dominate. The other part is n-type semiconductor.
The principle of LED lighting is to make the current pass through the wafer and collide with the electrons in the n-type semiconductor inside the wafer and the light-emitting layer of p-type semiconductor to produce photons. Then the LED lamp we see is the energy emitted by photons. The color of light emitted by semiconductors will be different with different materials. Because the size of the wafer is very small, the mass is relatively light, and the whole is relatively fragile, the wafer is often placed in the epoxy resin shell.
LED is presented by these chips. Connecting led beads together can form different LED lamps. The reason why LED lamps are so popular is that they are energy-saving and environmentally friendly. Moreover, LED lamps are of good quality, durable and can be recycled after use. Therefore, they will have more advantages than tungsten filament lamps, and have become the mainstream lights in the market
