LED (light-emitting diode) lamp is a major breakthrough in modern lighting technology, which occupies an important position in the lighting field with its high efficiency, energy saving, long life and environmental protection. Understanding the illumination principle of LED lights helps us better understand this advanced light source.
What is LED? LED is the abbreviation of "light emitting diode", which means "light-emitting diode" in Chinese. It is a semiconductor device that converts electrical energy directly into light energy.
The structure of the LEDA basic LED consists of a small semiconductor chip that is housed in a reflective cavity and encapsulated in a plastic or glass housing. One end of the semiconductor chip is connected to a conductive pin and the other end is grounded.
Luminescence principleThe luminescence principle of LEDs is based on the process of recombination of electrons and holes in semiconductor physics. When an electric current is passed through the LED, electrons move from one part of the semiconductor (n-type material) to another (p-type material). At the junction of n-type and p-type materials, electrons combine with holes, releasing energy. This energy is released in the form of light, which produces light.
Formation of color: LEDs can emit different colors of light, depending on the type of semiconductor material and the technology used in the manufacture of LEDs. By changing the composition of the material, it is possible to change the wavelength of the emitted light, resulting in different colors of light.
Pros:LEDs have many advantages over traditional lighting methods, including higher energy efficiency (less electricity converts into more light), longer service life (up to tens of thousands of hours), and environmental protection (no harmful substances such as mercury).
Fields of applicationLED technology is used in a wide range of applications, from everyday home lighting to commercial and industrial lighting to televisions, computer screens, and traffic lights.
The luminous principle of LED lamps not only demonstrates the wonder of semiconductor technology, but also represents a major advance in energy use and environmental protection. With the continuous development of technology, the application of LED in the field of lighting will become more extensive and efficient.