Company Filing History:
5 out of 7,574 
1 out of 140 Years Active: 2013-2014
Title: Yeun Joong Lee: Innovator in LED Technology
Introduction
Yeun Joong Lee is a prominent inventor based in Seoul, South Korea. He has made significant contributions to the field of LED technology, holding a total of five patents. His innovative work focuses on improving the efficiency and lifespan of LED circuits.
Latest Patents
One of Yeun Joong Lee's latest patents is the "LED driving apparatus and method." This invention provides an LED driving apparatus that includes a light-emitting unit with one or more LEDs, a rectifying unit that generates a first signal, a signal conversion unit that inverts the waveform of the first signal to create a second signal, and an operation unit that performs arithmetic operations on the first and second signals. This design allows for the generation of a signal with minimal ripple components, thus preventing the shortening of the LED's lifespan by eliminating the need for a smoothing electrolytic capacitor.
Another notable patent is the "LED circuit," which features a light-emitting unit comprising multiple light-emitting diodes and a switching unit that applies only positive voltage from an AC power supply to the anode of the light-emitting unit. This innovation simplifies the driving circuit and enhances the lifespan and efficiency of the LED circuit by avoiding the use of electrolytic capacitors and bridge circuits. Additionally, it ensures that no single light-emitting diode determines the lifespan of the entire array, as all diodes are driven simultaneously.
Career Highlights
Yeun Joong Lee has worked with notable organizations, including Samsung Electro-Mechanics Co., Ltd. and the University of Seoul Industry Cooperation Foundation. His experience in these institutions has allowed him to develop and refine his innovative ideas in LED technology.
Collaborations
Some of Yeun Joong Lee's coworkers include Sang Hyun Cha and Jae Shin Lee. Their collaboration has contributed to the advancement of LED technology and the successful development of various patents.
Conclusion
Yeun Joong Lee is a distinguished inventor whose work in LED technology has led to significant advancements in efficiency and lifespan. His innovative patents reflect his commitment to improving the field and enhancing the performance of LED circuits.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.