Automotive lighting guides are key components of interior ambient lighting and exterior light systems, requiring high transparency, uniform light output, and seamless appearance. These light guides are typically made of PMMA or PC materials, which demand a welding process that does not damage their optical properties or leave visible marks. Traditional welding methods may cause material yellowing, scratches, or uneven welds that affect light transmission and uniformity. DaokeDao plastic laser welding avoids optical damage, preserving the high transparency of light guides and ensuring uniform light output. The seamless, clean welds are invisible to the naked eye, enhancing the aesthetic appeal of interior and exterior lighting systems. The non-contact process avoids surface scratches and material yellowing, maintaining long-term optical performance. Our laser systems feature precise energy control, ensuring that the weld joint does not affect light transmission or cause light refraction. They support complex 3D light guide designs, adapting to the diverse lighting requirements of modern vehicles. With fast cycle times and consistent quality, our systems support mass production, helping automotive lighting manufacturers improve lighting effects and product quality.