LED lights will usher in explosive development!

Time : 2018-04-03

According to a nine-plus-one LED researcher, not long ago at the Geneva Motor Show, the third generation of Audi TTCoupe introduced LED headlamps officially met with the media, exquisite LED headlamps replaced the original xenon lamp assembly, become a show Great highlights.


With the continuous advancement and development of science and technology, the technology of the automotive industry is changing with each passing day, and the direction of the development of the automobile industry is slowly moving toward smart and green environmental protection. The same is true for the development of automotive light sources. In the auto show in recent years, we can see some models equipped with a variety of colorful LED lights, attracting the attention of consumers.


LED (Light Emitting Diode), translated into light-emitting diodes, is a light-emitting semiconductor electronic components. The LED lights, as the name suggests, refers to the use of LED lights as the light source. Because of its high brightness, rich color variety, low power consumption, and long life, LEDs have been widely used in the automotive industry in recent years.



LED lights create "green lighting"


Safety and energy saving are eternal topics in the development of the automobile industry and are also the core of the development of modern automobile technology.


The light signal is the language of the car, and the prompt and sensitive light signal is an indispensable guarantee for safe driving. However, due to poor sightlines during night driving, the driver’s judgment on the front of the vehicle will decrease, and insufficient light or bright lights will cause traffic accidents. According to the statistics of the National Highway Traffic Safety Administration, although the time of night driving only accounts for 1/4 of the total driving time, the proportion of deaths caused by traffic accidents accounts for 1/2. In addition, statistical data on the world's auto accidents show that the number of car traffic accident victims in the world is more than 10 million each year, including approximately 500,000 deaths. Traffic accidents at night occur three times as much as during the day, and accidents at poor lighting conditions are three times higher than at good lighting. “Because of the fast lighting speed of LED lights, it can reflect the conditions of the vehicle and road conditions in real time, leaving the driver with a longer time to judge. According to the test speed of 100 kilometers per hour, it can shorten the braking distance by 7.5 meters. It can effectively prevent rear-end collisions and reduce the number of cars. Safety accidents have positive significance for improving the active safety of vehicles,” said industry experts. In addition, the LED has controllability, such as light type, irradiation range, and brightness can all be linearly adjustable, while the traditional xenon lamp will not work. In recent years, LED technology has been continuously developed, technical shortcomings have been continuously overcome, and LED lights have become more and more intelligent. For example, the LED headlights of some models are equipped with an on-vehicle detection radar and a control computer. Even if the driver has long-distance high-beam lights, he will automatically turn down the light type of the light and even reduce the brightness.


Energy saving and environmental protection is another significant advantage of LED lights. According to the planning of the Ministry of Industry and Information Technology, as of the end of 2015, automotive lighting needs to achieve the goal of reducing carbon dioxide emissions. Because LED lights are cold light sources, they have the advantages of low power consumption and long life, and consume only one-tenth the power consumption compared to traditional lamps, which can save fuel consumption better. It is reported that if you compare daily energy-saving lamps, energy-saving lamps can save four-fifths of energy compared to incandescent lamps, and LEDs can save energy by 1/4 compared to energy-saving lamps. In the car, the same daytime running lights, LED components consume only 1/20 of the power of halogen lamps.


In addition, LED lights have high brightness, high temperature resistance, small size, high stability, no radiation and other advantages, are recognized as "green lighting." In the future, LED will be favored by more automakers and will be more widely used in automotive applications. The LED auto lighting market has a promising future.


Complete replacement requires a transition period


The LED light market is divided into interior light applications and exterior light applications. In the application of automotive interior lights, due to the rich color of LEDs, it is widely used today, such as dashboards. “At the moment, the number of light bulbs used in dashboards is very small. In the next few years, all vehicle dashboards will use LEDs.” A technician from Tireville said that in addition to the dashboard, common LED internal vehicles Lamps also have dome lights, instrument lights, door lights, reading lights, step lights, and so on.


Common external lights include headlights, brake lights, fog lights, reversing lights, turn signals, and daytime running lights. At present, the brake lights, taillights, turn signals, reversing lights, high brake lights, etc. have been applied to the LED. For the headlights, because of the important role played by the safe driving of the car, the requirements for light distribution are relatively high, coupled with cost constraints and heat dissipation issues, the LED as the main lighting source for the front end is still immature. “China’s auto industry has few independent brands, most of which are low-end and mid-range vehicles. There are not many LED lights. At present, only high-side brake lights and side turn lights use LED light sources. In addition, because of the problem of illumination distance and brightness, LEDs are rarely used. Headlamp lighting.” The technician told reporters that the current configuration of LED headlamps mainly concentrated in a few high-end models, such as the Audi R8 and A8, Mercedes-Benz CLS, BMW X6M and the new BMW 7 Series. “By being hindered by high costs, LEDs will not be able to fully replace halogen and xenon lamps in the next 3 to 5 years. Looking back at the history of the development of automotive lamps, halogen lamps have only matured in the past 20 years. LED lamps In terms of advantages, the future of LED lights will inevitably become a trend for the development of car lights, but it will take some time for the transition.” Ni Wei, regional manager of Philips (China) Investment Co., Ltd., said that as the cost of LEDs continues to decrease and the technology has increased, in recent years, The application of external lights has also increased.


LED lights are the new favorite of future lights


In February 2011, the European Union required all new models of cars and minivans to be equipped with daytime running lights. In addition to the European Union, other countries have also begun to regulate the introduction of daytime running lights for all types of new vehicles. National policies have been introduced to accelerate the popularity of LED lights. Industry experts point out that daytime running lights must maintain brightness while the vehicle is moving. Because LED light sources have the advantages of low energy consumption and long life, considering the safety of vehicles and the trend of energy-saving demand, it is an inevitable trend for manufacturers to develop LED daytime running lights.


Zhou Lihui, an associate professor of automotive engineering at Tsinghua University, believes that LED components have the great advantage of small size, compactness, ease of layout, and design, leaving car manufacturers ample space for car exterior design, breaking the shackles of past lighting systems on modeling innovation. , To meet the needs of automotive appearance modeling, China's own brand has a lot of interest in this area, which has brought business opportunities to the domestic LED lamp industry. The future LED lamp technology will certainly become the future trend of headlights.


In the future, the prices of LED lights will steadily decline, and will be applied more widely in the automotive field. LED lights will also become more secure and intelligent.


Development history of car headlights


The origin of the development of automotive headlights dates back to the end of the 19th century. In 1898, the Columbia electric car used electricity for headlights and taillights, so that electric car lights were born. After more than a century of evolution, the headlights have become an integral part of ensuring the safe driving of cars.


Looking at the development of car lights, it is not difficult to see that this is a micro-development history of science and technology. The first generation car headlights are incandescent lamps. In 1913, incandescent light bulbs came out. The working principle is that current flows through tungsten filaments, and hot tungsten filaments generate light radiation, which makes the light shine brightly. Incandescent lamps brought revolution in automotive lighting. In 1925, electric lighting was widely used in automobiles.


Turning over the page of incandescent lamps, we came to the era of the second generation of headlights - halogen headlights. Halogen lights are actually a new generation of incandescent lamps. If we want to increase the luminous efficiency of incandescent lamps, we must increase the temperature of the tungsten wire, but this will cause the sublimation of tungsten, and it will delustrate to blacken the glass shell. Including halogen elements or halides in incandescent lamps, the principle of halogen tungsten recycling can eliminate blackening of the glass bulb of incandescent lamps. This is the reason for the halogen lamp. It was officially born in 1960. The more traditional incandescent headlights have greater brightness, longer life, and more energy efficiency. The headlights of many cars today still use halogen lamps.


In 1991, the Xenon headlight era finally arrived. Xenon lamp, English abbreviation is HID (High Intensity Dis-charge Lamp), that is high-intensity discharge lamp. Xenon lamp is one of the high efficiency light sources made by the discharge phenomenon of high-pressure, ultra-high-pressure inert gas. It emits light twice as much as ordinary halogen lamps, and consumes only 2/3 of its energy, which is 10 times longer than that of ordinary halogen lamps. Xenon lamps greatly increase the safety and comfort of driving, and also help people to ease the tension and fatigue of night driving.


After several generations of evolution, it has finally reached the LED light source technology that leads the development trend of the lights. LED is the abbreviation for Light Emitting Diode. It was born in the 1960s. LED has many advantages. Since it is not a heat-illuminating illumination light source, the service life can be as long as 5 to 10 years. In addition, there are rich colors, safety and environmental protection, shock resistance and impact resistance, and small size and strong environmental adaptability. These characteristics are very attractive for automotive lighting systems. It can be said that LED light source is a very ideal light source. Due to the high cost, technology and regulations, LED is still not mature as a car headlight.


After a century of development, the lights on the car were used solely for lighting from the very beginning. Nowadays it is used in various applications such as night vision and decoration. It is believed that in the near future, there will be more and more advantageous technologies leading the car. The development of lighting.


Nine plus one Electronic Technology Co., Ltd. has been focusing on the production of car lights for nine years. Drilling into LED lights for many years, the LED general integrated headlights for motorcycles were listed earlier, and the LED car headlamps will be listed immediately.


In the near future, LED lights will usher in explosive growth.

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