Yu Guan

Title: Innovations of Yu Guan in Light-Emitting Devices

Introduction

Yu Guan is a notable inventor based in San Jose, California, recognized for his contributions to the field of light-emitting devices. With a total of six patents to his name, he has made significant advancements in the testing and calibration of LEDs, enhancing their reliability and performance.

Latest Patents

One of Yu Guan's latest patents is focused on light-emitting device test systems. This innovation involves the use of a photometric unit, which may include an integrating sphere, to measure various properties of light-emitting devices, such as flux and color. The design allows for reduced light loss through ports, inlets, or outlets, ultimately providing increased reliability and improved measurement accuracy. Another significant patent is for an LED calibration standard that features fast stabilization and lasting stability. This system includes a cylindrical hood surrounding the LED, an interior baffle to prevent light escape, and a photodetector that generates a signal proportional to the LED's luminous output. A variable current source stabilizes the LED light output by adjusting the operating current, ensuring consistent performance.

Career Highlights

Throughout his career, Yu Guan has worked with prominent companies, including KLA-Tencor Corporation. His experience in these organizations has contributed to his expertise in the field of light-emitting devices and their applications.

Collaborations

Yu Guan has collaborated with notable colleagues such as Ian R. Smith and Christian Wolters, further enhancing his work in the industry.

Conclusion

Yu Guan's innovative contributions to light-emitting devices and their testing systems have significantly impacted the field. His patents reflect a commitment to improving the reliability and accuracy of LED technology.