Jianhua Duan

Title: The Innovative Contributions of Jianhua Duan

Introduction

Jianhua Duan is a renowned inventor based in Shanghai, China, who has made significant strides in the field of electronics and power supply technologies. With an impressive portfolio of five patents, Duan has dedicated his career to advancing the efficiency and functionality of electronic circuits.

Latest Patents

Among his latest innovations are two notable patents. The first patent, titled "Circuit and Method for Driving LED Lamp with a Dimmer," details a driver circuit for LED lamps that includes a transformer, a dimmer circuit, and a controller. This innovative design allows for variable input voltage, thereby adjusting the output current according to the average input voltage, enhancing the versatility of LED lighting.

The second patent, "High Power-Factor Control Circuit and Power Supply," outlines a switched-mode power supply (SMPS) that regulates output based on a rectified input line voltage. This design features a unique power switch with a constant turn-on time and adjusts based on peak current, ensuring high power factor without the need for voltage sampling. The circuit is designed for efficiency, using a minimal number of components, showcasing Duan's focus on streamlined electronic design.

Career Highlights

Duan's career has been marked by his association with prominent organizations in the semiconductor industry. He has worked for BCD Semiconductor Manufacturing Limited and BCD Semiconductor Manufacturing Co., Ltd., where he has honed his skills in circuit design and power management technology. His experience in these companies has contributed significantly to his development as an innovator.

Collaborations

Throughout his career, Jianhua Duan has collaborated with other brilliant minds in the industry. Notably, he has worked alongside coworkers Na Liu and Xuegang Ren, with whom he has exchanged innovative ideas and techniques, further enriching the landscape of power supply technologies and enhanced circuit designs.

Conclusion

Jianhua Duan stands out as a pivotal figure in the realm of electronic innovations. His contributions through patents, along with his collaborative efforts in the semiconductor sector, reflect a deep commitment to enhancing electronic systems. As he continues to advance technology, Duan’s work undoubtedly paves the way for future developments in lighting and power supply solutions.