Akihiro Ohshita

Title: Akihiro Ohshita: Innovator in Optical Technology

Introduction

Akihiro Ohshita is a prominent inventor based in Higashihiroshima, Japan. He has made significant contributions to the field of optical technology, holding a total of 5 patents. His work focuses on enhancing the efficiency and functionality of optical devices, particularly in the area of optical pickup systems.

Latest Patents

One of his latest inventions is an optical pickup position control device. This device automatically adjusts tracking with precision and in a short time. It utilizes two deviation signals, which express the deviation of a light beam projected by a pickup using the three-beam method, from a target track of a disk. These signals are digitized by two AD converters, and high-pass filters extract AC signals to produce a tracking error signal. Additionally, low-pass filters are employed to extract DC signals and low-band signals containing DC components. A control circuit then calculates correction values to be applied to offset correcting circuits and gain/balance correcting circuits, allowing for collective and simultaneous corrections.

Another notable patent is a power supply circuit designed to reduce power loss and extend the service life of a battery in devices with widely variable power-consuming loads. In this system, a rechargeable battery supplies power while its output voltage remains above 3.4V. When the voltage drops below this threshold, a voltage increasing circuit activates, allowing a dry battery to serve as a power supply. This innovative approach ensures that power is efficiently managed and recharges the rechargeable battery when necessary.

Career Highlights

Akihiro Ohshita is currently employed at Sharp Kabushiki Kaisha Corporation, where he continues to develop cutting-edge technologies. His work has significantly impacted the optical technology sector, leading to advancements that improve device performance and energy efficiency.

Collaborations

Throughout his career, Ohshita has collaborated with notable colleagues, including Terufumi Hino and Masahiro Sakagawa. These partnerships have fostered a creative environment that encourages innovation and the development of new technologies.

Conclusion

Akihiro Ohshita is a distinguished inventor whose contributions to optical technology have led to significant advancements in the field. His innovative patents reflect a commitment to improving device efficiency and functionality. His work continues to influence the industry and inspire future innovations.