Location History:
- Kanagawa Prefecture, JP (2003)
- Kanagawa, JP (2005)
- Yokohama, JP (2005 - 2007)
Company Filing History:
Years Active: 2003-2007
Title: Makoto Ookuma: Innovator in Display Device Inspection Technology
Introduction
Makoto Ookuma is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of display device technology, particularly in inspection methods and devices. With a total of 4 patents to his name, Ookuma's work has advanced the accuracy and efficiency of display inspections.
Latest Patents
One of his latest patents is an inspection method and inspection device for display devices and active matrix substrates used for display devices. This invention includes an inspection circuit that judges defects in each pixel based on the current flowing through an inspection interconnect. The device features a correction circuit that generates a first correction current to cancel out the first current when all pixels are set to an off-state. Additionally, it includes a detection circuit that measures values for each pixel and a defect judgment circuit that assesses defects based on these measurements.
Another notable patent is an apparatus and method for inspecting picture elements of an active matrix type display board. This invention enhances the accuracy of picture element inspections by canceling irregularities in source switches and noise caused by device driving signals. The method involves a second sensing step where gate lines are not selected, allowing for a more precise determination of picture element quality.
Career Highlights
Makoto Ookuma is currently employed at Wintest Corporation, where he continues to innovate in the field of display technology. His work has been instrumental in developing advanced inspection methods that improve the reliability of display devices.
Collaborations
Throughout his career, Ookuma has collaborated with notable colleagues, including Masatoshi Itoh and Shouji Nara. These collaborations have contributed to the development of cutting-edge technologies in the display industry.
Conclusion
Makoto Ookuma's contributions to display device inspection technology have significantly impacted the industry. His innovative patents and ongoing work at Wintest Corporation highlight his dedication to advancing technology in this field.