In automotive lighting applications, currently world-renowned car brands such as BMW and Audi are making efforts to apply this technology to new products. At the same time, laser pointer lighting is a “point light source”, and it is expected to be integrated with optical fiber technology in the future. I believe that the two can derive a greater application prospect.
The brightness of the two can’t be compared, because the laser is straight light, and the direction is very strong. If it is not processed, the brightness will be much larger than that of the LED. The RGB visual effect of laser is still immature and only stays in the laboratory. Laser projection and laser TV are only a concept at present. Shunji Nakamura, the “Father of Blue Light” who won the Nobel Prize in Physics, once compared the advantages and disadvantages of laser lighting with LED lighting. He believes that laser lighting has a smaller luminous area, higher luminous efficiency, and is easier to focus and illuminate sensory The distance is farther, and it can be widely used in automobile headlights and other fields.
There are different opinions on whether laser lighting will replace LED lighting in the next 10 years. Based on the characteristics of smaller laser size, more compact structure, and long projection distance, some people in the industry believe that May replace LED lighting, such as automotive lights and display technology. In the field of general lighting, some people expressed doubts about the replacement of LED lighting with laser lighting within ten years. However, the development trend of any kind of innovative technology is worthy of attention.
Next, let’s take a look at the application of car lights. According to relevant tests, the advantage of laser lights is that the direction of the laser beam can be controlled by a lens to achieve flexible illumination, which can be directed to the front, and the distance is twice that of the LED high beam. At the Consumer Electronics Show in Las Vegas, USA, which opened in early January 2014, Audi released the concept car. This is also Audi’s first model equipped with laser headlights, which also indicates that Audi laser headlights will be put into use.
The advantages of laser headlights: high brightness, long irradiation distance, and flexible guidance. Usually the laser can only emit several fixed colors of red, blue and green lights, so there is a requirement to convert it into a relatively bright and close to natural light illumination. The color temperature of daylight is 5500K during sunny days, and the color temperature of laser headlights is also 5500K. If a layer of phosphor is coated on the front of the blue laser pointer, its beam color will become white, and the operation principle of the laser headlight is the same. The lamp group contains a small laser diode in front of the laser diode There is a very small phosphating layer, which can turn the blue beam into white.
5500K is a color that is relatively close to daylight. It will be white and not too white to the naked eye. Audi also believes that this is the most suitable color temperature. The green laser pointer headlight can be used normally in far and near light. The main advantage of the laser is that it is smaller and the irradiation distance is farther. Compared with the LED high beam, the irradiation distance is increased from 250 meters to 500 meters. As for penetration, weather such as rain, snow, and fog will affect the penetration of any car lights, and laser headlights are no exception.