Yun Fei Duan

Title: Innovations by Yun Fei Duan in Lighting Technology

Introduction

Yun Fei Duan is a notable inventor based in Shanghai, China. He has made significant contributions to the field of lighting technology, holding two patents that showcase his innovative approach to enhancing lighting systems.

Latest Patents

One of his latest patents is a retrofit lamp designed to be used with a ballast. This retrofit lamp incorporates a shunt switch that operates in parallel with an output load. The shunt switch is adapted to shunt the input terminals of the lamp using pulse width control, allowing for precise tuning of the current through the lighting element. This current control feature ensures compatibility with various ballasts and provides dimming capabilities. Additionally, a detection circuit is integrated to identify any abnormal drive conditions of the retrofit lamp. In such cases, the pulse width control of the shunt switch can be overridden by maintaining the shunt switch in a stable state for a specified duration. This mechanism prevents overload conditions and mitigates the risk of DC signals during component failures. Another significant patent is related to an LED bulb, further emphasizing his commitment to advancing lighting technology.

Career Highlights

Yun Fei Duan is currently employed at Signify Holding B.V., a company renowned for its innovative lighting solutions. His work at Signify has allowed him to explore and develop cutting-edge technologies in the lighting sector.

Collaborations

He collaborates with talented coworkers, including Wang Li and Xiaoqing Duan, who contribute to his projects and innovations.

Conclusion

Yun Fei Duan's contributions to lighting technology through his patents reflect his dedication to innovation and improvement in the field. His work continues to influence the development of advanced lighting solutions.