Design of a new pixel LED automobile headlamp

Abstract

Because LED has the advantages of energy saving, environmental protection, long service life and fast response time for traditional light sources, LED is gradually replacing the position of traditional light sources in the field of lighting, and LED is more and more widely used in automobile headlights. However, there are some safety problems during vehicle driving. For example, the glare of strong high beam lights on oncoming vehicles and passers-by at night has become the main cause of many traffic accidents. The emergence of ADB (adaptive driving beam) has reduced the occurrence of such traffic accidents to a certain extent, However, compared with pixel car headlights, it still has some limitations. For example, its controllable precision is not high enough, and its ability to deal with some more complex environments is not enough. At the same time, due to its projection ability, pixel headlights can not only remind drivers of driving safety, but also help other traffic participants, and their safety has been greatly improved. This paper introduces a new type of intelligent automobile headlamp based on pixel led. In this automobile headlamp, five LEDs with 1024 pixels are used, which are divided into imaging area and lighting area. The light distribution lens matching each area is designed. At the same time, the brightness and brightness of each pixel LED are controlled through circuit design, so as to realize the projection imaging of traffic signs and the light type transformation of high beam anti glare and low beam. Pixel LED car headlights have more accurate control accuracy and higher safety than general adaptive car headlights.