Kazuaki Otsuka

Title: Inventor Spotlight: Kazuaki Otsuka

Introduction

Kazuaki Otsuka is a notable inventor based in Yokosuka, Japan, recognized for his significant contributions to the field of semiconductor technology. With a total of five patents to his name, Otsuka has developed innovative solutions that enhance the functionality and efficiency of light-emitting devices.

Latest Patents

Among his latest inventions is the **semiconductor light emitting device**, which encompasses a semiconductor light-emitting element alongside two phosphors. The first phosphor absorbs light from the semiconductor and emits first wavelength-converted light, whereas the second phosphor emits second wavelength-converted light. This advanced setup ensures that the first phosphor has a specific excitation spectrum that increases with the wavelength around the peak wavelength of the semiconductor, while the second phosphor maintains a flat or decreasing excitation intensity.

Another remarkable patent is the **optical semiconductor device**, wherein a semiconductor light-emitting element is strategically placed within a depression of a container. This design incorporates a first fluorescent material layer located within the depression, enabling it to interact effectively with the light emitted from the semiconductor. The inclusion of a second fluorescent material layer further enhances the device's performance, allowing for the emission of lights with various wavelengths, thus broadening its potential applications.

Career Highlights

Kazuaki Otsuka has had a distinguished career, having worked with prestigious companies, including Kabushiki Kaisha Toshiba and Toshiba Materials Co., Ltd. His experience in these organizations has provided him with a solid foundation in semiconductor technology, contributing to his successful patent portfolio.

Collaborations

Throughout his career, Otsuka has collaborated with talented individuals in the field, including Junichi Kinoshita and Naomi Shida. These partnerships have undoubtedly fostered an environment of innovation, leading to the development of groundbreaking technologies.

Conclusion

Kazuaki Otsuka’s contributions to the field of semiconductor technology and his innovative patents reflect his expertise and dedication as an inventor. His pioneering inventions continue to advance the capabilities of light-emitting devices, marking him as a significant figure in the world of innovation.