YUYANG D&U Co., Ltd. engages in the manufacture and sale of power solutions and lighting products. It operates through the following business divisions: Digital Display, Light-Emitting Diode (LED) Solution, Ubiquitous, Renewable Energy and Petrochemical Business. The Digital Display business provides ultra-slim power supply, super LCD inverter power supply, hybrid ICs and modules and LED driver module. The LED solution business offers LED for indoor lighting, outdoor lighting, channel signs and art signs. The Ubiquitous business offers smart LED lighting system and human-interface system. The Renewable Energy business includes hybrid LED plant factory, hybrid street lighting system, hybrid controller, wind energy system and solar energy system. The Petrochemical business provides Chemical Engineering services and includes sales and distribution services for petrochemical manufacturers. The company was founded by So-Eun Cho on November 4, 1976 and is headquartered in Hwaseong, South Korea.