With the continuous development of lighting technology, as well as the continuous support of government policies, LED light efficiency continues to improve, the product has gradually solved the high prices, the situation is single and other issues. LED applications more and more widely, more and more popular application technology, in the current car penetration rate is very high, LED lighting technology and automotive lighting have become increasingly close contact.
LED headlights the advantages
1.Energy saving: it is converted directly from electric energy to light energy by light-emitting diodes. It consumes only 1/10 of the traditional light bulbs. It can save fuel consumption and protect the car circuit from being burned with too high load current. The
2. Environmental protection: no ultraviolet and infrared in the spectrum, no heat, no radiation, glare small, and waste can be recycled, no pollution does not contain mercury elements, you can safely touch, is a typical green light led light source.
3. Long life: there is no loose part of the lamp body, there is no filament light burning, heat deposition, light failure and other shortcomings, in the appropriate current and voltage, the service life of up to 8-10 million hours, longer than the traditional light source More than 10 times. With a replacement, life-long use of the characteristics.
4.high brightness, high temperature. Power directly converted to light energy, heat small, completely hand touch, safe and secure.
5. small size. The person can freely change the lamp mode, so that car shape diversification. Car manufacturers favor LED, LED is entirely the advantages of their own decision.
6.stable performance, led seismic performance: resin package, not easy to break, easy to store and transport.
7. luminous high purity, clear color bright, no shade filter, light error within 10 nanometers.
8.the reaction speed, no hot start time, micro-seconds to light, the traditional glass bulb is 0.3 seconds delay, to prevent rear-end, to ensure traffic safety.
LED headlights shortcomings
1.LED headlights than ordinary lights high cost. At present, with the growing popularity of LED applications, prices will be further reduced.
2.the popularity of car lights difficult, poor heat dissipation, heat treatment is not easy to light failure, affecting the lamp life.
3.there is no introduction of industry standards, product quality uneven, with the same product with a different LED production price difference of 1-2 times the phenomenon has.
Analysis of LED Automobile Lighting Technology and Its Present Situation
As the fourth generation of automotive light source, LED has many advantages over other traditional light sources. This paper analyzes the feasibility and advanced nature of LED lighting, introduces its typical driving circuit, and emphatically studies the application status of LED and AFS in automobile headlamp. This paper introduces the problems and countermeasures of automotive LED lighting, and prospects its future development.
Automotive LED lighting the feasibility and advanced
The use of lighting in the car began about the beginning of the 20th century. The first use of kerosene lamp and acetylene lamp, began to use electric light in 1910, has experienced incandescent, halogen and high-intensity discharge gas lamp HID (Intensity Discharge Lamp), since 1985, entered the LED car Light era. At the same time LED headlights used in adaptive foreground system AFS (Adaptive Front Lighting System) technology appears.
At present, LED has been used by many car manufacturers to create a variety of lights style. BMW, Ford, Honda, Toyota, Mercedes-Benz, Audi and other famous brand cars in order to improve their overall competitiveness, have introduced a variety of LED headlights with a variety of new cars to attract customers.
LED has many other light sources do not have the advantages:
(1) long life, good shock resistance. LED life of the theory of up to 50,000 hours, the actual life of up to 20,000 hours (ordinary halogen bulb is only 150 to 500 hours), generally have to exceed the life of the car itself. In addition, the basic structure of the LED is not vulnerable to moving parts, so the seismic performance is very good. (2) energy saving and environmental protection. LED in the low voltage and low current conditions can get enough brightness, the power consumption is only the same brightness incandescent 10% to 20%; LED light source does not harm the human health of mercury, the production process and waste will not Causing environmental pollution.
(3) fast response. Compared with incandescent, LED light response time has reached tens of nanoseconds, so that when the use of LED as a taillight, you can make the follow-up car drivers to respond earlier to reduce the occurrence of traffic accidents.
(4) small size. Small LED can make the car style design more free and diversified, so that the model is more fashionable; compared with the traditional light source, LED lamp system installation depth can be reduced by 80 mm, which for the car styling and internal parts layout is important .
At present, the automobile industry is still a pillar industry in the global economy, and at a critical period of rapid development, it will certainly drive the development of automotive lighting for LED applications in the automotive market to provide a broad market space.