Company Filing History:
Years Active: 2014
Title: Change Seok Lee: Innovator in LED Technology
Introduction
Change Seok 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 3 patents. His innovative work focuses on improving the efficiency and lifespan of LED circuits.
Latest Patents
Change Seok Lee's latest patents include an LED driving apparatus and method. This invention provides an LED driving apparatus that consists of a light-emitting unit with one or more LEDs, a rectifying unit that converts an input signal to generate 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. By arithmetically operating a plurality of AC signals with different waveforms, the invention generates a signal with minimal ripple components, thus driving the LED without the need for a smoothing electrolytic capacitor, which is a primary cause of reduced LED lifespan.
Another notable patent is an LED circuit that includes a light-emitting unit with multiple light-emitting diodes and a switching unit that applies only the positive voltage of an AC power supply to the anode of the light-emitting unit. This design simplifies the driving circuit and enhances the lifespan and efficiency of the LED circuit by eliminating the need for an electrolytic capacitor and a bridge circuit. Additionally, this approach ensures that no single light-emitting diode determines the lifespan of the entire array, as all diodes are driven simultaneously.
Career Highlights
Change Seok Lee is currently employed at Samsung Electro-Mechanics Co., Ltd., where he continues to innovate in the field of LED technology. His work has garnered attention for its practical applications and contributions to energy efficiency.
Collaborations
He collaborates with talented coworkers, including Yeun Joong Lee and Deuk Hee Park, who contribute to the development of advanced technologies in the company.
Conclusion
Change Seok Lee is a key figure in the advancement of LED technology, with a focus on enhancing efficiency and lifespan through innovative designs. His contributions are shaping the future of lighting solutions.