With the development of semiconductor technology, led lights, LED display, LED backlight and other new affairs have appeared in people's vision. The paper describes the application of LED in various fields, and points out that LED improves people's modern life.
LED is a light-emitting diode (Light Emitting Diode) abbreviation, it is following the incandescent and fluorescent light after the third generation of solid light source. In the internal structure, LED and semiconductor diodes similar to the P and N area, forming a "P-N junction."
When the current through, the electron will be pushed to the P area, in the P area in the electronic cavity with the hole, and in the form of photons to send energy, which is the principle of LED light. Since the birth of the first LED in the 1960s, this small size, long life, energy saving, environmental protection, the new light began to enter the people's lives. Now, from indoor lighting to urban landscape lighting, from the instrument lights to car lights, from the TV to the big screen display, LED everywhere and is changing people's lives. Here I will talk about the next LED in the lighting and display on the impact of modern human life.
1.LED in urban lighting applications
Urban lighting is to protect the work and life of the people indispensable conditions; urban landscape lighting to beautify the city, to bring vitality and vitality to the city, enhance the image of the city, enrich the people's lives, to people work and life to facilitate.
At present, the existing public lighting equipment mainly sodium lamps, metal halide lamps and mercury lamps, photoelectric conversion efficiency is not high, power consumption is very large. In today's global energy shortage environment, energy conservation has become the trend, green, efficient, long life of the LED lights gradually into the people's vision. LED as a streetlight has the following advantages: high luminous efficiency, low reflection loss of lamps, saving energy 70%; with digital control brightness function, more power; no high pressure, high security; with the software can be remotely remote control brightness; Fog, rain and other special circumstances to provide ultra-high brightness and high color of the lighting source; installation and maintenance simple; module installation, no extra wiring; will not cause light pollution or waste; long life, means that do not need to be replaced frequently , Thereby reducing the potential for traffic disruption and reducing the cost of maintenance for this purpose.
2.LED in automotive lighting applications
Automotive light source in the field of lighting occupies an extremely important position, its output accounts for about 10% of the total output of the entire lighting source. LED used for automotive lighting was first in the mid-1980s, when it was mainly used for high brake lights. LED brake lights compared to traditional incandescent, can work in a smaller drive current, lower power can reduce the car's internal line system size and weight. LED brake light response time is short, if the front of the car immediately brakes, then the rear of the car than the traditional incandescent brake lights in advance 0.7s ~ 1s see the signal, so that the driver left more reaction time, Thus improving the safety of driving safety assurance.
At present, the car can be divided into automotive exterior and internal use, including instrumentation, air conditioning, audio and other indicators and internal reading lights; external use, including brake lights, taillights, directional lights, side lights and so on. With the continuous improvement of LED optical performance, packaging design more targeted and practical, it will be personalized for the car, integrated design to provide greater room for development. With the rapid development of technology, LED prices have been declining, the future will reduce the rate of greater, so the use of LED in the car will become increasingly popular.