Michio Ishijima

Title: Michio Ishijima: Innovator in Thermal Head Technology

Introduction

Michio Ishijima is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of thermal head technology, holding 2 patents that showcase his innovative approach to solving complex engineering challenges.

Latest Patents

Ishijima's latest patents include a Thermal Head Driving Integrated Circuit and a Thermal Head Driving Circuit. The Thermal Head Driving Integrated Circuit features a design where input serial data is converted into parallel data using a shift register. This circuit allows for the driving of transistors based on the ANDs of the parallel data and a strobe signal. Additionally, an input selection circuit determines the timing for serial/parallel conversion and transistor driving, ensuring that these timings are constantly different to eliminate the need for latch circuits.

The Thermal Head Controller patent addresses the prevention of electric erosion in thermal heads during non-printing periods. By applying a bias voltage to the heating resistance elements, a motor drive circuit rotates a platen roller to delicately move a heat-sensitive medium. This movement changes the moisture on the surfaces of the heating resistance elements, thereby preventing damage. Alternatively, preliminary pulses can be applied to a driver IC to energize the heating elements without affecting the heat-sensitive medium, ensuring moisture is evaporated to avoid electric erosion.

Career Highlights

Ishijima is currently employed at Rohm Co., Ltd., where he continues to develop innovative solutions in thermal technology. His work has significantly impacted the efficiency and reliability of thermal printing systems.

Collaborations

Throughout his career, Ishijima has collaborated with talented individuals such as Takaya Nagahata and Mitsuhiko Fukuda. These collaborations have fostered a creative environment that has led to advancements in their respective fields.

Conclusion

Michio Ishijima's contributions to thermal head technology through his patents and work at Rohm Co., Ltd. highlight his role as an influential inventor. His innovative designs continue to shape the future of thermal printing technology.