Car headlights, also known as car headlights, car LED daytime running lights, as the eyes of the car, not only related to the external image of a car owner, but also closely related to safe driving under night driving or bad weather conditions. The use and maintenance of the lights are not negligible.
A brief history of the development of car lights
The world's first headlights were oil-burning. At first, the car was equipped with a steam lamp. Because the stability of early electric lights is not good, and the brightness is not as good as that of steam lamps, steam lamps with kerosene as the main energy source are the best choice for automotive lighting, but the shortcomings of steam lamps are also very obvious. First, the steam lamps need to be preheated, not immediately. Light up.
With the development of technology, the stability of the electric lamp has been solved to a certain extent, it can be lit at any time, there is no delay, and multiple light groups can be used to realize the switching function of far and near light, which perfectly interprets this sentence to "illuminate your Beautiful!†But the electric light at this time is still an incandescent lamp, which has low luminous efficiency and short life, and needs further improvement.
Finally, an upgraded version of the incandescent lamp - Deng Deng Deng Deng ~ halogen lamp appeared. The halogen lamp is filled with a halogen gas such as iodine or bromine in the original incandescent lamp, which not only greatly increases the life of the filament, but also further saves energy by more than 30%. To this day, halogen lamps are still used on most economical family cars.
Blue light plus thick lens
Until the 1990s, a large company took the lead in successfully transplanting xenon lamps to automotive lighting and launched xenon lamps.
Xenon lamps have higher brightness, lower energy consumption and longer life than halogen lamps. However, xenon lamps are higher in manufacturing cost than halogen lamps, so they have only been used in high-end models for a long time. On the other hand, the physical spectrum penetration of xenon lamps is generally high. In foggy weather, halogen lamps are still needed to help. Halogen lamp.
From RGB to the LCD era
In the more than ten years since the emergence of Xenon headlights, LED lights have quickly entered the field of vision. LED lights have higher luminous efficiency, lower energy consumption and longer life than any light bulb.
From the first assembly of LED lights to production cars 10 years ago until now, the manufacturing cost of LED lights has dropped significantly. It is now lower than the manufacturing cost of xenon lamps and is a representative of a new generation of lighting.
Some people like to compare the xenon lamp with the led car light, especially when choosing the modified lamp, it will always be a bit hesitant to use the xenon lamp or the LED lamp.
Xenon headlights vs. xenon lights
Xenon lights:
advantage
1. The xenon lamp has a brightness efficiency three times higher than that of the halogen lamp, and has obvious effects on improving the visibility of the driving sight at night and in the fog;
2. The luminous flux emitted by the xenon lamp is more than twice that of the halogen lamp, and the efficiency of converting electrical energy into light energy is also increased by more than 70% compared with the halogen lamp, so the xenon lamp has a relatively high energy density and light intensity.
3, half of the power saving, 60W halogen lamp 1230 lumens, 35W xenon lamp can reach 3500 lumens;
4, Xenon lamp has no filament, so there will be no problem of scrapping due to broken wire, the service life is much longer than the halogen lamp, the xenon lamp can theoretically use 3000 hours;
Xenon headlight lens assembly is insufficient:
1, the concentrating is not good, the lens must be used to bundle the light, increasing the volume and weight.
2, the power supply requirements are higher, the modified xenon lamp is easy to cause the driving computer to report obstacles.
3. There must be an electromagnetic shielding layer, otherwise it will cause damage to other electronic devices in the car, causing the vehicle to stall.
However, according to the latest technology, because of the decoder, the two problems are solved.
Next, talk about the advantages of LED lights:
1, long life, generally up to 40,000 or even 100,000 hours. Some people think that if the future car lighting uses LED, it can basically be used to scrap the car;
2. High efficiency and low energy consumption. The LED light source can directly produce the red, amber and other colors required by the automobile lamp without filtering color, and has no loss, and the power utilization rate is as high as 80% or more;
3, no delay in lighting, fast response speed (nanoseconds), suitable for fast moving objects;
4, suitable for low voltage work, no voltage force for car batteries;
5, LED footprint is small, the designer can change the shape of the lamp at will, the shape is diversified.
insufficient
1. The popularity of LED car headlights is difficult. The heat dissipation of LED originals is poor, and the heat dissipation is not easy to light decay. Affect the life of the lamp.
2, not suitable for long-term lighting, long-term lighting and heating is large, you must install a radiator.
3, poor maintenance performance, a single LED original damage needs to replace the assembly.
With the widespread use of led lights in automobiles, people are paying more and more attention to the problems existing in led lights. Today, through various high-tech research and development improvements, special high-speed fans and improved heat dissipation are embedded in led lights. Design, so that the heat problem on the led light has been perfectly improved.
Industrial Main Board Cable:SCSI,D-SUB,DVI,Wire to Wire ,RJ45...
There are five types of main board power line interface, and different external devices correspond to different interfaces. Different interfaces and their connecting pins are also different. For example, the pin of the main power supply is 24 pins, and the hard disk drive is 5 pins.
1. 20pin + 4Pin interface: it is a common interface combination, in which 20pin is the main power interface and 4Pin is the auxiliary power supply interface.
2. 5pinsata interface: special interface for power supply of hard disk and optical drive.
3. 6pin? PCI? Express connector: a special interface for independent graphics power supply.
4. 4Pin connector: it is a kind of floppy disk power connector, which is used to power the floppy drive equipment.
5. 4Pin power interface: optical drive, old IDE hard disk and peripheral hardware power supply interface.
Industrial Main Board Cable
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