Kiyohiro Nozaki

Title: Kiyohiro Nozaki: Innovator in Coordinate Input Technology

Introduction

Kiyohiro Nozaki is a prominent inventor based in Nara, Japan. He has made significant contributions to the field of coordinate input devices, holding a total of 4 patents. His work focuses on enhancing the accuracy and functionality of devices that detect user input through electrostatic coupling capacitance.

Latest Patents

Nozaki's latest patents include a coordinate input device and a display-integrated type coordinate input device. These inventions are capable of directly detecting electrostatic coupling capacitance with high accuracy. In his coordinate detection method, a first electrode drive circuit sequentially selects source electrodes of the TFT LCD panel. This circuit connects the selected electrodes to an x-signal current amplifying circuit while applying an AC voltage to the non-selected electrodes. The x-signal current amplifying circuit detects a current that corresponds to the distance to a finger or a conductor pen, allowing for precise x-coordinate detection. Similarly, a second electrode drive circuit and a y-signal current amplifying circuit operate to obtain y-coordinate detection voltage. This innovative approach enables pointing by a codeless pen and a finger, enhancing user interaction with devices.

Another notable invention is a coordinate input device designed for inputting characters and drawings. This device includes a pen switch sensing circuit that provides power to a pen switch in a position sensing pen. It also features a pen switch control circuit that manages the timing of the power supply. The power supply is activated only when coordinate sensing operations are not affected, preventing erroneous readings during the sensing period.

Career Highlights

Kiyohiro Nozaki is associated with Sharp Kabushiki Kaisha Corporation, where he continues to develop innovative technologies. His work has significantly impacted the usability of electronic devices, particularly in the realm of touch and pen input systems.

Collaborations

Nozaki has collaborated with notable colleagues such as Takao Tagawa and Hitoshi Nohno. Their combined expertise has contributed to the advancement of coordinate input technologies.

Conclusion

Kiyohiro Nozaki's contributions to the field of coordinate input devices demonstrate his commitment to innovation and technology. His patents reflect a deep understanding of user interaction and the importance of accuracy in electronic devices.