LED automobile era amount increased seven or eight year into

There auto lamp with the development of automobile industry and the progress of science and technology, new light source and people's aesthetic values and continuous improvement, the structure becomes more complex, more and more sophisticated technology, more perfect function. Modern automobile lamps and lanterns has become a high-tech connotation of exquisite handicrafts, is a pair of beautiful eyes". The evolution of automotive lamps has gone through four stages, and the emergence of the fourth generation of LED automobile light source, far-reaching impact on the reform of automotive lamps.

Into the third generation, the fourth generation light source

The world has car lights. Automotive lamps can be divided into two categories: lighting devices and signal devices. The function of the lighting device is to illuminate the road ahead of the vehicle in the darkness. There is a front lamp, front fog lamp, reversing lamp and license plate lamp. The function of the signal device is to show the existence and running state of the vehicle to other road users. There are lights on the specifications and standards for the lamp light source, light color, light intensity, light shape and installation position, etc..

Auto lamp is the heart of the light source, and changes of automotive lighting with automotive light change, largely through the four stages as follows:

First generation car light source is composed of fuel (candles, kerosene or acetylene) direct combustion of light, it can meet the requirements of the early light, but has very low light emission efficiency, light intensity, unstable performance, complex operation and other obvious shortcomings.

The second generation of automotive light is incandescent lamp. In 1879 Edison invented the incandescent lamp, incandescent lamp in 1913 the United States first application technology in Cadillac automobile headlamp, revolutionized automotive lighting, automotive lighting and into the electric era. Then, there have been car reflectors, starter, generator and battery and other new technologies, in 1925 began to enter the real time of the automotive incandescent lamp. Halogen tungsten lamp appeared in 1950s, it will soon become the main light bulb.

Third generation automobile light source is a gas discharge lamp (HID). The utility model has the advantages of high luminous efficiency, high brightness, high reliability, etc. the utility model replaces the incandescent lamp and the halogen tungsten lamp as the light source of the new automobile headlamp.

Fourth generation automobile light source is a semiconductor light-emitting diode (LED). LED is a semiconductor pn junction diode, when a positive bias applied to the PN junction, the PN junction system excited by the carrier, by low-energy state transition to high-energy state, when the unstable carrier in the high-energy state back to the ground state complex, according to the principle of conservation of energy, energy excess will release in the form of photons, it is LED electroluminescent principle. It is not through the heat to make the object temperature and light, is the direct conversion of electricity into light, which is called the cold light. The wavelength of light emission depends on the difference of the energy difference between the carrier and the energy state.

The emergence of the LED light source will produce another revolution of lighting, which has epoch-making significance.

Due to the development of semiconductor technology, especially microelectronics and semiconductor light-emitting technology is becoming more and more perfect, the automobile lamp into the third generation (HID) and fourth generation (LED) light period. At the same time, the adaptive headlight control system (AFS) is composed of sensors, processors and actuators. HID, LED and AFS new automotive lighting and lighting control system market and the formation of electronic components to bring huge business opportunities.

HID lights become standard

With the rapid extension of the world expressway network, in order to improve the running speed of the vehicle, vehicle safety, lighting and service life of the light source is put forward higher request.

With the degree of automotive electronics continues to improve, with increased consumption of cars, the power source especially to reduce power consumption before the lamp has become a pressing matter of the moment. With the increasingly fierce competition in the car, the need for a smaller size, brighter headlights to meet the more modern, comfortable, luxurious and environmentally friendly new car launch. Miniaturization of HID automotive light source to become the first R & D projects.

1984 Philip company pioneered the miniaturization of HID (High Intensity Discharge) for the idea of the auto headlamp; 1988 Europe has jointly developed by the seven companies EURECA273 project, accelerate the utilization of HID in 1991; BMW car first equipped with HID headlamp. Since then, HID headlamps are gradually replaced by ordinary halogen headlamps. At present, Mercedes Benz, BMW, Ford, general motors, TOYOTA, Volkswagen, Chery, Roewe and other cars equipped with HID headlamps. With the improvement of HID technology, the decline in the price of the product, will further accelerate the HID headlamps become the standard configuration of high-end cars.

HID light source is mainly composed of xenon lamp and high voltage rectifier, the high-voltage rectifier has nearly 160 electronic components. Domestic HID rectifier used electronic component 80% is imported components, accounting for more than 85% of the total cost, which provides opportunities and challenges to China's electronic components industry.