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2010 Beijing Auto Show, BMW showed a concept called the Gran Coupe four-door sports car. Gran CoupeGran Coupe night at the BMW design deliberately creating an atmosphere of coming out, the focus naturally falls on its visual style and sharp LED headlights. More than BMW, Mercedes-Benz, Audi, Lexus also introduced a variety of models equipped with LED headlights. Released from the Audi R8 first use of LED headlights have been more than 2 years, known as the 4th generation of the LED is automotive lighting, emerging high-end models.
BMW Gran Coupe Concept four-door sports car LED headlights.
Automotive light sources in the lighting field occupies a pivotal position, with its output accounting for about 10% of the total output of about lighting. If a car changed all the lighting LED, out of about 400 to 600 required LED. In fact, as early as 10 years ago, LED on the scaled journey into the automotive field. Currently, LED lighting inside and outside the vehicle has exceeded the proportion of 80%.
Green LED headlights add durability horizon
The car headlights for the LED, it has always been a hard nut to crack. Because of distance and luminance lighting, LED headlamp lighting rarely used.
Tony Armstrong: high efficiency through the use of the drive can cope with heat dissipation
"There is no doubt that most of the headlights is still incandescent." Linear Technology products, power products marketing director Tony Armstrong, frankly, "However, this advantage will be from now on from the high intensity discharge (HID ) lamps and high-brightness (HB) LED front light pressure. "HID lamps in the late 90s of last century the first to be used as car headlights. However, the production and manufacture of such lamps are very expensive, so their use has been limited to high-end cars.
"Currently about 15% of the new car is equipped with HID." Automotive Semiconductor product marketing engineer Paul Decloedt estimates. However, HID light output too, on the close of cars, pedestrians constitute the risk of glare.
In addition, HID moment of starting to 35,000 volts of high pressure, may interfere with car stereos and other electrical appliances. It tried the owners of said xenon lamp, xenon lamp in the rain and fog weather conditions are relatively poor penetration. Paul Decloedt Paul Decloedt said: "The poor did not feel that the number of halogen lamps."
Therefore, Tony Armstrong is more optimistic about the HB LED, he believes in the HB LED will replace the HID headlights applications. He said: "HB LED headlight in the next 10 years will be extremely high rate of growth."
Paul Decloedt: LED light beam and the former is the main bottleneck in thermal management
Not difficult to find, LED headlights are mostly in high-end cars, especially sports cars are more common. Paul Decloedt said: "The use of LED headlamps can get more respect in the vehicle model changes." As LED headlights than incandescent, HID and more compact, more cars overall design flow can also be linear. Paul Decloedt further pointed out that the "compact" is not only smaller LED lamp itself, but also in optical components and electronic circuits with the use of LED and the corresponding weight.
In addition, LED there are many other advantages, such as an instant turn-on, no warm-up, easier to control brightness and so on. Also, do not forget the LED lighting industry into killer - a long life.Because LED long life, eliminating the replacement headlight "light bulb" issue.
Sheng automotive world wind blowing energy saving, LED appearance was in line with the green and efficient environmental requirements. "LED is green light, good color spectrum, there is no excess IR, UV and other spectra, does not contain harmful substances mercury, radiation is also very little." Shenzhen Secom Telecom Co., Ltd., said Liu Wei, Senior Application Engineer, LED light source with more high-lumen, and the LED is solid state lighting, HID lamps with different quartz glass is not fragile moving parts, with excellent shock resistance, failure is very low, almost maintenance-free.
Brightness LED headlight is still controversial
In the standard LED headlamp Lexus RX450h forum, is hot RX450h of LED headlamps. "Even if the car hit the front bumper tone, the tangent is also very light blue under the light type, with the corner of my headlights is better than it recognizable." Netizens such a description of Lu Yu RX450h LED headlamp practical results. The owners rejected another RX450h Road, "as long as the open RX450h owners must be very clear, LED headlights bright, very focused, though not very bright side looks like. LED than HID light source even focus, in particular the traffic light to stop According to the car in front bumper along the very bright, very bright open mountain is safe. "The owner of the original double-B fans (BMW, Benz), since a big difference on the Lexus.
