Company Filing History:
2 out of 166 
2 out of 19,775 
Years Active: 2012
Title: Innovations of Jian-Jun Liu
Introduction
Jian-Jun Liu is a notable inventor based in Shanghai, China. He has made significant contributions to the field of electronics, holding a total of 2 patents. His work focuses on enhancing the functionality and efficiency of electronic devices.
Latest Patents
One of his latest patents is a dual-mode charger circuit. This innovative circuit includes a first charge circuit and a second charge circuit connected in parallel between a power source and a battery. It allows for charging the battery under both slow charge and quick charge modes. A central processing unit detects the battery's capacity and determines whether it exceeds a predetermined level, outputting a mode control signal accordingly. A mode switch circuit then toggles the second charger circuit on or off based on this signal. When the second charge circuit is off, the battery charges slowly, and when it is on, the battery charges quickly.
Another significant patent by Liu is a key assembly used in electronic devices. This assembly features a printed circuit board (PCB) with two optical couplers, a key body, and a supporting assembly. The key body is rotatably supported on the PCB and consists of a circular disk with multiple teeth extending towards the PCB. These teeth interact with the optical couplers to generate control signals that manage various operations of the electronic device.
Career Highlights
Jian-Jun Liu has worked with several prominent companies, including Ambit Microsystems (Shanghai) Ltd. and Hon Hai Precision Industry Co., Ltd. His experience in these organizations has contributed to his expertise in electronic innovations.
Collaborations
Some of his notable coworkers include Rong Li and Feng-Chang Yan. Their collaboration has likely fostered a creative environment that encourages innovation.
Conclusion
Jian-Jun Liu's contributions to the field of electronics through his patents and career experiences highlight his role as a significant inventor. His work continues to influence the development of advanced electronic devices.