Yasuhiro Ueda

Title: Yasuhiro Ueda: Innovator in Light Emitting Devices

Introduction

Yasuhiro Ueda is a prominent inventor based in Hirakata, Japan. He has made significant contributions to the field of light emitting devices, holding a total of 4 patents. His work has been instrumental in advancing technology in this area.

Latest Patents

One of Ueda's latest patents is a manufacturing method of a light emitting device. This method involves forming an active layer composed of a compound semiconductor containing indium through a vapor phase growth method. Additionally, it includes the formation of a cap layer made of a compound semiconductor on the active layer, also using a vapor phase growth method at a growth temperature that is approximately equal to or lower than that of the active layer. Another notable patent is for an optical pickup with a diffraction element that consists of six regions providing spatial variation corresponding to a focus state. This invention features a six-segment holographic surface divided into regions by dividing lines, and a four-segment photodetection part that is divided into four equal-area photodetection parts. The main light beam diffracted in the regions of the holographic surface is condensed as spots at positions apart from each other on opposite sides of a section line of the four-segment photodetection parts.

Career Highlights

Ueda is currently employed at Sanyo Electric Co., Ltd., where he continues to innovate and develop new technologies. His work has garnered attention in the industry, contributing to advancements in optical technologies.

Collaborations

Ueda has collaborated with notable coworkers, including Tatsuya Kunisato and Takashi Kano. Their combined expertise has further enhanced the quality and impact of their inventions.

Conclusion

Yasuhiro Ueda is a distinguished inventor whose work in light emitting devices has led to several important patents. His contributions continue to shape the future of optical technology.