Hung-Lu Chang

Title: Innovations of Inventor Hung-Lu Chang

Introduction

Hung-Lu Chang is a prominent inventor based in Taichung, Taiwan. He has made significant contributions to the field of optical recording technology. With a total of 5 patents to his name, his work has had a considerable impact on the industry.

Latest Patents

One of his latest patents is for a write-once optical recording medium. This invention includes a dielectric layer, a recording layer, and a reflective layer, which are stacked on a substrate in a specific order. The recording layer contains mixed nickel oxides that decompose to release gas and become transparent upon heating. Another notable patent is a method for detecting and compensating disk tilt, along with the apparatus used for this purpose. This invention addresses the issue of disk tilt that causes coma, which degrades the carrier-to-signal ratio of a pickup. The method employs a two-dimensional grating to produce multiple laser beams for detecting disk tilt in both radial and tangential directions. An actuation device then adjusts the reflection angle of a reflective mean to compensate for the coma induced by the disk tilt.

Career Highlights

Hung-Lu Chang is associated with the Industrial Technology Research Institute, where he continues to innovate and develop new technologies. His work has been instrumental in advancing optical recording mediums and improving their performance.

Collaborations

He has collaborated with notable coworkers such as Tzu-Ping Yang and Der-Ray Huang, contributing to various projects and innovations in the field.

Conclusion

Hung-Lu Chang's contributions to optical recording technology demonstrate his expertise and commitment to innovation. His patents reflect a deep understanding of the challenges in the industry and provide solutions that enhance performance and reliability.