Sojiro Kirihara

Title: Sojiro Kirihara: Innovator in Optical Disc Technology

Introduction

Sojiro Kirihara is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical disc technology, holding a total of 11 patents. His work has focused on improving the performance and reliability of optical disc drives and apparatuses.

Latest Patents

One of Kirihara's latest patents involves an optical disc drive designed to enhance the recording and reproducing performance. This innovation addresses the degradation of traveling performance of an optical pickup during hard acceleration or deceleration. By incorporating a groove structure between two gears of a guide feed in the optical pickup, the engagement state between the screw gear and the guide feed gears is stabilized. This design prevents tooth jumping and step-out, ultimately improving the optical disc drive's performance.

Another notable patent pertains to an optical disc apparatus. In this design, a printed circuit board (PCB) is attached to a tray that faces the chassis main or bottom plate of the housing. The tray features a first protruding portion that extends toward the chassis, with a second protruding portion positioned opposite it. This configuration allows the second protruding portion to support the first during tray deformation, preventing further damage and ensuring the integrity of the apparatus.

Career Highlights

Sojiro Kirihara has worked with several notable companies throughout his career, including Hitachi LG Data Storage, Inc. and Hitachi Consumer Electronics Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in optical technology.

Collaborations

Kirihara has collaborated with talented individuals in the field, including Shinya Tsubota and Yoshiyuki Tanaka. These partnerships have contributed to the advancement of optical disc technology and the successful development of his patents.

Conclusion

Sojiro Kirihara's contributions to optical disc technology have significantly impacted the industry. His innovative patents and collaborations with esteemed colleagues highlight his dedication to improving the performance and reliability of optical devices. His work continues to influence advancements in this field.