Junichi Kumagai

Title: Junichi Kumagai: Innovator in Plasma Display Technology

Introduction

Junichi Kumagai is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of plasma display technology, holding a total of 2 patents. His work has advanced the functionality and efficiency of plasma display devices, making them more effective for various applications.

Latest Patents

Kumagai's latest patents include a plasma display device and a driving method that utilizes all cell reset and ON cell reset operations. The plasma display device features a display panel equipped with first and second display electrodes, as well as address electrodes. It also includes an electrode drive circuit and a drive control circuit that manages the electrode drive circuit. The drive control circuit is responsible for executing reset drive control, address drive control, and sustain drive control within each subfield. Notably, it performs an all cell reset drive control that resets all cells in a first subfield and an ON cell reset drive control that resets ON cells in a second subfield.

In his driving method for plasma display panels, sustain pulses are alternately applied to a pair of display electrodes in discharge cells to generate a sustain discharge, which displays images on the plasma display panel. The sustain pulses consist of two-crests discharge voltage waveforms, which have first and second maximum values, allowing for discharges to occur twice within a half cycle. This innovative approach enhances the display quality and efficiency of plasma screens.

Career Highlights

Kumagai is currently employed at Hitachi, Ltd., where he continues to develop cutting-edge technologies in the field of display systems. His work has been instrumental in pushing the boundaries of what is possible with plasma display technology.

Collaborations

Throughout his career, Kumagai has collaborated with esteemed colleagues such as Katsumi Ito and Naoki Itokawa. These partnerships have fostered a creative environment that has led to significant advancements in their shared field of expertise.

Conclusion

Junichi Kumagai's contributions to plasma display technology exemplify the innovative spirit of modern inventors. His patents reflect a deep understanding of the complexities involved in display systems, and his work continues to influence the industry.