It is a lighting device that illuminates the front to secure a safe view when driving at night. Often used interchangeably with the term' headlight.' However, a headlamp refers to the entire lighting device, and a headlight refers to the light rays generated by the headlamp. In the early days of automobile history, headlamps using lamps were used. Since then, with the development of lighting technology, the performance of headlamps has also evolved dramatically. After going through halogen and HID (High-Intensity Discharge) light sources, LEDs with abundant light and excellent power efficiency have been mainly used. Of course, the light source is small and easy to control is also an advantage of LEDs. Thanks to this, the headlamp has more design and can only illuminate the target area.