Yu-Cheng Chang, an accomplished inventor based in Cupertino, California, has made significant strides in the field of electrical engineering. With a remarkable portfolio of 14 patents, Chang stands out for his innovative contributions, particularly in the area of power line technology and LED systems.

Latest Patents

Among his latest inventions, Chang has developed a power line resistance sensing device. This advanced device is designed to work with lamp systems equipped with LED modules linked to a power supply. It features a control unit that includes several critical pins: one for activating the LED switch, another for firing a testing current into the lamp system before it fully engages, and a third pin to measure the voltage drop induced by the testing current. This mechanism allows for the comparison of the voltage drop with a predetermined safety threshold, ensuring optimal control over the LED activation.

Another notable invention is a voltage regulation circuit for LED tubes. This circuit is cleverly designed to connect to an AC source and includes a controlling part with three impedance units, as well as a controlled part that encompasses at least one LED unit. The intricate connection between the impedance units and the LED unit helps regulate voltage levels efficiently, making it a vital component for enhancing LED technology.

Career Highlights

Yu-Cheng Chang has had a fruitful career with key roles in reputable companies that have honed his expertise in electrical engineering. Notably, he has worked at Alfasemi Inc. and O2Micro International Limited. His contributions in these organizations have significantly impacted the advancements in LED technology and power management systems.

Collaborations

Throughout his career, Chang has had the pleasure of collaborating with fellow engineers and innovators, including Yung-Lin Lin and Te-Lung Shih. These professional relationships have fostered an environment of creativity and innovation, leading to the successful development of various technologies.

Conclusion

Yu-Cheng Chang's innovative spirit and continued quest for improvement in electrical technology have established him as a remarkable figure in the industry. With 14 patents to his name and groundbreaking inventions like the power line resistance sensing device and voltage regulation circuit for LED tubes, Chang's work is sure to leave a lasting impact on the future of power management and lighting solutions. His collaborations and career experiences further illustrate the importance of teamwork and shared knowledge in driving innovation forward.

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