With the help of semiconductor chips, it can convert electric energy into visible light. So LED can emit light even without filament. With the rapid development of science and technology, many tungsten lamp have been eliminated by the market, and LED lights gradually began to replace tungsten lamp.

The semiconductor chip in LED can convert electric energy, which can turn light into light. Therefore, the semiconductor chip is equivalent to the heart of LED, and there are positive and negative electrodes at both ends of the chip. The positive electrode is connected to the power supply, and the negative electrode is connected to the bracket. Although the volume of a semiconductor wafer looks small, its interior consists of two parts. Part of it is p-type semiconductor, which is dominant. The other part is n-type semiconductor.

The principle of LED lighting is to let current pass through the wafer and collide with electrons in the N-type semiconductor and P-type semiconductor luminescent layer inside the wafer to generate photons, so the LED lamp we see is the energy emitted by photons. Semiconductors of different materials will produce different colors of light. Because the wafer is very small in size, light in weight and relatively fragile as a whole, it is usually placed in an epoxy case.

LED is composed of these chips, and different LED lamps can be formed by connecting LED beads together. The reason why LED lamps are so popular is that they are more energy-saving and environmentally friendly. Moreover, LED lamps are of good quality, durable and recyclable after use, so they will have more advantages than tungsten lamp and become the mainstream lamps in the market now. ?