Satoru Fujishima

Title: Satoru Fujishima: Innovator in Piezoelectric Technology

Introduction

Satoru Fujishima is a prominent inventor based in Muko, Japan. He has made significant contributions to the field of piezoelectric technology, holding a total of 8 patents. His innovative designs have paved the way for advancements in sound technology and motor systems.

Latest Patents

One of his latest inventions is the spherical piezoelectric speaker. This speaker features a small and simple structure, a wide sound frequency range, and high sound pressure. It includes a spherical shell piezoelectric ceramic body that is hollow inside, along with external and internal electrodes that define a driving device for oscillating the ceramic body. Additionally, a sound absorber is provided in the hollow section of the piezoelectric ceramic body, and a frame for holding the ceramic body is disposed on its outer surface via dampers to reduce the influence of external oscillation.

Another notable invention is the ultrasonic motor. This motor consists of a plurality of Langevin vibrators arranged in a ring. The vibrators vibrate when an alternating voltage is applied. Each Langevin vibrator has a first polarized region and a second polarized region that are polarized in mutually opposite directions. When supplied with an alternating voltage, the vibrators vibrate in both length mode and flexural mode at substantially the same frequency, causing the edges of the metal terminals to move in an elliptical motion, which drives the rotor.

Career Highlights

Satoru Fujishima is currently employed at Murata Manufacturing Co., Ltd., where he continues to innovate and develop new technologies. His work has significantly impacted the fields of audio and motor technology, showcasing his expertise and creativity.

Collaborations

He has collaborated with notable coworkers, including Akira Ando and Hideharu Ieki, contributing to various projects and advancements in their respective fields.

Conclusion

Satoru Fujishima's contributions to piezoelectric technology through his innovative patents have established him as a key figure in the industry. His work continues to influence advancements in sound and motor systems, highlighting the importance of innovation in technology.