Fumiyo Tojo

Title: Fumiyo Tojo: Inventor of a Piezoelectric Film Device

Introduction

Fumiyo Tojo is an inventor associated with Gose, Japan, and Matsushita Electric Industrial Co., Ltd. Her work includes a patent for a piezoelectric film device and a method for driving it.

Latest Patents

Tojo’s listed patent, “Piezoelectric Film Device, and Driving Method of the Same,” describes a device built around a piezoelectric film element and a power supply circuit. The element has two electrodes with a piezoelectric film between them, and its polarization vector can be inverted by applying a specified voltage. Because the film’s lattice constant differs according to the polarization direction, the device can retain a corresponding displacement position after the voltage is stopped. Tojo is credited with 1 patent.

Career Highlights

Tojo’s documented patent work concerns the use of polarization switching in piezoelectric films to maintain distinct displacement positions. The patent identifies Matsushita Electric Industrial Co., Ltd. as her company affiliation.

Collaborations

Hirokazu Uchiyama and Hiroyuki Kita are listed as Tojo’s coworkers. The available information does not specify their roles in the patent or the nature of their collaboration.

Conclusion

Fumiyo Tojo’s recorded invention applies polarization-dependent properties of piezoelectric film to a device that can retain its displacement position without continuous voltage.