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ledlight2010's blog: "led car light"

created on 12/21/2010  |  http://fubar.com/led-car-light/b338388

LED has used in automotive lighting for some time, but only two types of vehicles have applied all auto LED lights for the whole car so far. One is Mercedes-Benz CLS, and the other is the recent released new generation Audi A8. According to China automotive manufacturers, domestic sales of Audi A8 generally use xenon headlights, all LED auto lights is en optional equipment. From this we can not help but ask what is on earth the result of the all LED headlight lamp? Which is better between LED auto light and xenon lighting?

 

Let’s look at the light-emitting principle between car LED lamp and xenon lamp:

LED is a component of solid semiconductor. When these semiconductor materials are electrifying, only parts of the energy will flow through them and the excess energy will release in the form of light, which converts electrical energy directly into light energy.

 

LED brightness doesn’t directly related to the working voltage, 12V vehicle voltage can completely drive LED to light. When the LED voltage is loaded constantly, the LED is more brightness when the greater the current through it.

 

Xenon lamp consists of starter, electronic ballast and xenon sealed in the glass tube. Excited xenon light emitting need the starter boost the vehicle voltage from 12V to 23000V, then the starter loads the 23000V UHP onto the xenon. In this process, it is easy to produce high voltage ignition and cause a fire once it’s leakage.

 

From this point of view, using LED auto light is more secure than xenon lamp. Compared the lighting effects of LED auto light with that of xenon lamp, single LED light source is still less brightness than xenon lamp. In the light group of majority cars, LED auto light is only a supporting role of xenon lamp.

 

However, manufactures tell us that LED auto light can emit different light of color temperature through some special power conversion device. Mercedes-Benz CLS LED daytime running light can transform the color temperature under certain conditions, which can be used as LED fog light.

 

More reading:

The 8th China Car Supplies (Zhenzhou) Fair

led auto light-Development trend

Obstacles of led car bulb industry in China

 

 


Third LED brake light

Generally, third LED brake light is installed upon car rear so that the rear car can easily find the front car brake to avoid rear-end accident.

Third LED brake light is used to warning the behind vehicles. No third LED brake light vehicles, particularly lower chassis vehicle and mini automotive, because of its low brightness when the car brakes, the rear followed vehicle (especially higher chassis trucks, buses and public buses) is sometimes difficult to see clear. Therefore, rear-end accidents occurring risk is greater.

Large number of studies shows that third LED brake light car effectively prevent and reduce rear-end accidents. Therefore, third LED brake lights have been widely used in many developed countries. For example, in the USA, all new cars must be installed with third LED brake light since 1986 in accordance with the regulations; all new light trucks also have to install third brake light since 1194.

LED Car brake light

There are three kinds of LED car brake light by its location, LED car tail brake light, LED car dashboard brake light and LED car third brake light.

 

Sockets of tail brake light:

BAY15D LED car tail bulb light is also called P21/5W or 1157, the structure of this kind of socket has a double-wire. This kind of LED car bulb owns the function of warning and position-indicating. When in the brake function, power is 21W; when in position-indicating function, power is 5W. Generally, the position-indicating function is open.

 

W21/5W(7443) has a double-wire, with warning function and position-indicating function. Power is 21W when in brake function and 5W when in position-indicating function. Position-indicating function is usually open.

 

P27/5W(3157), double-wire, with warning function and position-indicating function. Power is 27W when in brake function and 5W when in position-indicating function. Position-indicating function is usually open.

 

What’s the brake light used to? Rear brake light and third brake light are used to avoid the rear-end accident. Dashboard brake light is used to indicate when the rear brake light is lighting.

 

Most of LED auto lights are made up of several LED lights, due to long working hours of testing will lead to bad light among the LED lights. The following is the solution for the bad lights:

 

1: Is the LED chip size greater than 12*13ML?

Use chips greater than 12*13ML to ensure it not be burned

 

2: Is the operating temperature within 55?

LED chip will accelerate the decay of aging beyond 55. Therefore, it should be noted in the design of the relationship between current and temperature.

 

3: Whether LED chips are branded or not?

Select LED chips with good stability to ensure no leakage current with long working hours.

 

4: Is the package packed by formal automatic packaging factory?

 The phenomenon of bad light has a close relationship with LED package, every aspect of the package is very important. The procedure of solid crystal, dispensing, wire and baking is the most important measures of anti-static.

 

5: Is the current of LED chip beyond 20mA?

Generally, the common wedge LED car lights can bear current between 16mA and 18mA, no more than 22mA, or will accelerate aging.

 

6: Whether the voltage of the LED chip is DC or not?

The voltage of the LED chip must be DC, otherwise, it will reverse breakdown, leading to bad light.

 

7: Does the production process of the LED lights make well measures for anti-static 

People often produce static electricity which can directly breakdown the LED chip, resulting bad light.  You’d better to find a LED light manufacturer who owns a good anti-static.

 

8: The most critical step, is the LED light through aging testing when it is finished production?

LED car light also needs to continuous aging test for 24h after finishing production. Basically, it will not come up bad lights after the 24h aging test. It means that it will not produce defective product. Because this large amount of project, rare LED car light manufacturer insist on doing it. However, our Dingju LED car light insists on it all the way. In addition, we are special strict with the LED raw material.

 

Speaking of car lighting, I have to mention the Philips automotive light which does business mainly through the following product line: headlights (xenon lamp, halogen), car signal light and interior decoration light, non-car product line (motorcycles, trucks and buses). The company has 48 sales offices covering all the major countries and regions. Philips owns the first market share in the world and leading almost all the covering areas.

 

For the future direction of car lights, Philips owns itself thought.

 

View from the current situation in China, the most important point for Philips and other automotive lighting business is to guide customers to shift from price-oriented to value-oriented. Customer demand is divided into two categories: one type is value concerned, such as private car and business vehicles drivers. For these customers, Philips wants to use leading technical innovation to provide upgrade products to meet their high demand. Another type is cost concerned, such as taxi and truck drivers. For these customers, Philips hopes to bring in “TCO” concept to provide life light, high brightness but reasonable priced car lights products. In order to better serve customers, channel development is very important. Philips is implementing a project, hoping to expand the first-line market of the advantage channel to the 2,3-line market that further expanding the market and holds more market share and maintain the leading position in each segment of the automotive lighting market.

 

LED car light is one of the important directions for future development of the car lighting. On the one hand, Philips is certain the advanced technological LED light. On the other hand, he is still optimistic about the sustainable development of the traditional halogen automotive light bulb. They think that halogen lamp is still favorable with the cheap and relatively low-end vehicles in many emerging markets.

 

In a word, the future direction of automotive lighting is a market development of mixture multiple technologies. 

Mercedes-Benz E260

The new Mercedes-Benz E-class has been completely out of the double “8”shaped headlight, but still be the separation design. More than six radars installed in the bumper are enough to ensure the safety of parking. Irregular-shaped lights look like more sparkle. The cleaning system of the headlight can effectively clean dirt so that it can make light more penetrates.

You will find differences in details just look from the car rear, which specific performs the more “sharp” of the side tail light. This design matches the sharp sense of the head of car. After all, this car model emphases more on sports performance and deliberately in the style to cater the this style

BMW LED light

I have been very much in love with the design of the BMW LED light, not only for the LED angel eyes, but also for the attractive overall design of the headlights.

The car interior unified uses the orange backlighting and nearly every key are provided the backlighting. In addition, along the top of the door handles and door panels glows orange light so that the interior car is full of a trace of mystery. Atmosphere light is designed with hidden light source which greatest avoids the interference for the sight of the driver. The interior car door to door light and the protocol is to enhance the 535Li luxury level.

New 5 series retains the classic design of the “angel eyes”, but made an adjustment to the light source. The original application of CCFL is replaced by LED for LED light emitting diodes is higher brightness and beam uniformity. Self-luminous type light eyebrow with the new BMW design elements makes more sense of hierarchy within the headlight.

The biggest change for the new generation of BMW 5 series is that it has completely abolished the Bangor style luggage to avoid being criticized again. However, people have put focus on the new taillights, the slightly upturned led tail light retained the movement and the split design is perfect unity with the traditional BMW style.

 

Auto LED turning light

LED car turning light plays an important role in warning the before or rear people and cars when car turns. Here introduce three kinds of LED car turning lights which have much common with each other.

 

T25 1156 auto turning bulb with 3528SMD can be cool well. It’s environment protecting, energy saving, 4000hours only1156 led turning light consume 1Watt

1: Type: T25 (1156 auto turning bulb)

2: Socket: BA15S

3: LED quantity: 18 SMD

4: LED Specification: 3528 1chip SMD

5: Color: all the color are available (White and Blue are very popular )

6: Working voltage: 12VDC

 

T25 BA15S car turning light: steady performance, for 2000hours, deterioration is about 20%

1: Model: T25

2: Socket: BA15S (car turning light)

3: LED quantity: 18leds

4: LED Specification: 4.8mm

5: Color: Red, yellow, green, blue, white, amber and so on ,all are available

6: Working voltage: 12VDC / 24VDC

 

T25 1156 led car turning light is energy saving: Original car was equipped with incandescent lamp, it’s 21W, but for this type LED is 1-3W, less 100W for the whole year! And we can save oil about 100 liter for five years

1: Model: T25

2: Socket: BA15S

3: LED quantity: 12leds

4: LED Specification: 5mm Round

5: Color: Red, yellow, green, blue, white, amber and so on, all are available

6: Working voltage: 12VDC / 24VDC

 


Car turning light

What’s car turning light? It is a light that play a role of warning the before or rear people and cars when car turns.led turning light

 

By the use of materials, car turning light can be divided into gas car turning light and LED car turning light.

 

Gas car turning light owns mature technology, low price, but it will produce radiation and contains mercury, whose shell is made up of glass, easy to break and pollute the environment.

 

LED car turning light is no radiation, no pollution and life long. It can work for 50000hours, in other words, it equals to the life of the car.  However, the widely used of the LED car turning light subject to certain limitations because of its high price.

 

Divided by location, car turning light have head car turning light, rear car turning light and side car turning light.

 

Head car turning light is installed beside the auto headlight, which is used to warn the front vehicle when turning

 

Rear car turning is installed in the rear of the car, which is used to alert the behind vehicle.

 

Side car turning light is installed next to the door of the first cab or installed in the rear view mirror, which is used to alert the lateral vehicle.

 

 

This kind of LED car light is hot selling and popular for western customers. It owns five sides and 360 degree emitting angle. It is cabinet and have quick response, super bright. 501 led car light can work for one week continuously within the temperature range of -30 to +55, for the white color can working under -30 to +85 

Specifications:

1:Type: T10led signal light

2:Socket: Wedge

3:LED quantity: 5 smd

4:LED specification: 5050 smd -3chips

5:Color: red,yellow,green,bule,white,amber ect,all colours are available.

6:Voltage working range: 12VDC / 24VDC / 24-30VDC;

Usage: Used in the auto car and truck side light, signal light, with international standard, all types of auto can be use.

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