Youling Li

Title: Youling Li: Innovator in LED Technology

Introduction

Youling Li is a prominent inventor based in Shenzhen, China, known for his significant contributions to the field of LED technology. With a total of 9 patents to his name, he has developed innovative circuits and methods that enhance the efficiency and performance of light-emitting diode (LED) light sources.

Latest Patents

One of Youling Li's latest patents is titled "Circuits and methods for driving LED light sources." This invention features a driving circuit designed to control the power of an LED light source. The circuit includes a transformer, a switch controller, and a dimming controller. The transformer has a primary winding that receives input power from an AC/DC converter and a secondary winding that provides output power to the LED light source. The switch controller, which is coupled between an optical coupler and the primary winding, receives a feedback signal that indicates the target level of current flowing through the LED light source. It then controls the input power to the primary winding based on this feedback signal. The dimming controller, connected to the secondary winding, regulates the output power by adjusting the feedback signal according to a switch monitoring signal that indicates the operation of a power switch connected to the AC power source.

Another notable patent is "Circuits and methods for driving light sources." This invention includes a controller that manages power to a light source through a first sensing pin, a second sensing pin, and a driving pin. The first sensing pin receives a signal indicating the current through an energy storage element, while the second sensing pin detects whether this current decreases to a predetermined level. The driving pin provides a signal to a switch to control the current through the light source to a target level. The controller also features an error amplifier that generates an error signal based on the first signal and a reference signal indicating the target level.

Career Highlights

Throughout his career, Youling Li has worked with several companies, including O2 Micro, Incorporated. His work has focused on developing advanced technologies that improve the functionality and efficiency of lighting systems.

Collaborations

Youling Li has collaborated with notable professionals in his field, including Tiesheng Yan and Feng Lin. These collaborations have contributed to the advancement of LED technology and the development of innovative solutions in lighting.

Conclusion

Youling Li's contributions to LED technology through his