Hiroyasu Yoshida

Title: Hiroyasu Yoshida: Innovator in Optical Technology

Introduction

Hiroyasu Yoshida is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of optical technology, holding a total of four patents. His work focuses on enhancing the performance and reliability of optical pick-up devices.

Latest Patents

Yoshida's latest patents include a cooling arrangement for an optical pick-up. This invention provides a reliable optical pick-up that prevents performance deterioration, service life shortening, and malfunctioning due to heat generation from a laser driver IC. The design features a metallic pattern on a flexible printed board, which is wider than the external shape of the laser driver IC. This pattern is made of the same material as the wiring pattern and is strategically bent to ensure optimal performance.

Another notable patent is for an optical pickup device with protrusions in the laser beam direction to shield ultraviolet light. This invention addresses the challenges of adhesion fixing a holder for a light-emitting diode (LD) or light-receiving element to an optical pickup casing using ultraviolet-curable adhesive. The design includes protrusions on the bonding surface of the holder, which allows for high positioning accuracy and reduced curing shrinkage during ultraviolet irradiation.

Career Highlights

Hiroyasu Yoshida is currently employed at Hitachi Media Electronics Co., Ltd. His work at this esteemed company has allowed him to develop innovative solutions that enhance optical technology. His contributions have been instrumental in advancing the capabilities of optical pick-up devices.

Collaborations

Yoshida has collaborated with notable coworkers, including Manabu Ochi and Fumihito Ichikawa. Their combined expertise has fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Hiroyasu Yoshida's work in optical technology exemplifies the spirit of innovation. His patents reflect a commitment to improving the performance and reliability of optical devices. Through his career at Hitachi Media Electronics Co., Ltd., he continues to make significant contributions to the field.