Company Filing History:
Years Active: 2021-2025
Title: Innovations of Jisoo Chang in Smart Card Technology
Introduction
Jisoo Chang is a prominent inventor based in Seoul, South Korea. He has made significant contributions to the field of smart card technology, holding a total of 5 patents. His work focuses on enhancing the efficiency and functionality of smart cards through innovative voltage conversion methods.
Latest Patents
One of Jisoo Chang's latest patents is a bi-directional voltage converter for smart cards. This invention includes switching elements connected between an input node and an output node, along with a start-up transistor designed to optimize performance. The bi-directional voltage converter is capable of storing a driving voltage in a storage capacitor during booting operations and efficiently providing this voltage to the input node. Additionally, it can boost another driving voltage at the input node step-wise, achieving high efficiency with a reduced occupied area.
Another notable patent is the internal voltage generator for smart cards. This generator features a mode detector that generates a mode signal indicating whether the card is in contact or contactless mode. The low-drop out (LDO) regulator responds to this mode signal, adjusting its operation to ensure optimal performance in both modes. This innovation enhances the versatility and reliability of smart cards in various applications.
Career Highlights
Jisoo Chang is currently employed at Samsung Electronics Co., Ltd., where he continues to develop cutting-edge technologies in the smart card sector. His work has positioned him as a key figure in the advancement of smart card functionalities, contributing to the company's reputation for innovation.
Collaborations
Throughout his career, Jisoo has collaborated with talented individuals such as Eunsang Jang and Jungduk Suh. These collaborations have fostered a creative environment that encourages the development of groundbreaking technologies.
Conclusion
Jisoo Chang's contributions to smart card technology through his innovative patents demonstrate his expertise and commitment to advancing the field. His work at Samsung Electronics Co., Ltd. continues to influence the future of smart card applications.