The working principle and main application of LED
Time:2023-05-06
Views:207
LED is a commonly used light-emitting device, which can efficiently convert electrical energy into light energy and has a wide range of uses in modern society.
Principle of operation
The working principle of light-emitting diodes (leds) is based on the properties of semiconductor materials. When an electron passes through a semiconductor material, it binds to the hole and releases energy. This energy is released in the form of photons, forming visible light. Leds are composed of two semiconductor materials, one is P-type material and the other is N-type material. When an electric current is passed through the LED, the electrons and holes combine at the junction of the PN junction, releasing energy, which results in visible light. Different semiconductor materials produce different colors of light, so leds can emit different colors of light.
Main purpose
1. lighting: LED has high efficiency, low consumption, long life and other characteristics, become the mainstream technology in the field of modern lighting. LED lighting can be applied to home, commercial, industrial and outdoor lighting, such as LED bulbs, LED tubes, LED floodlights, LED street lights, etc.
2. display: LED has the characteristics of high brightness, high contrast and fast response, become the mainstream of modern display technology. LED display can be used in TV, computer monitor, mobile phone screen, digital billboard and other fields.
3. Indicator light: LED indicator light has the characteristics of high brightness, long life and low power consumption, which is widely used in indicator light of electrical appliances, automobiles, machinery and other equipment.
4.Backlight: LED backlight has the characteristics of high brightness, long life and low power consumption, which is widely used in the backlight of flat panel TV, mobile phone, computer and other equipment.
Sophia-1009