Location History:
- Chigasaki, JP (1984 - 1986)
- Kanagawa, JP (1988 - 2003)
Company Filing History:
Years Active: 1984-2003
Title: Seiichi Arakawa: Innovator in Liquid Crystal Display Technology
Introduction
Seiichi Arakawa is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of liquid crystal display (LCD) technology, holding a total of 9 patents. His work focuses on enhancing the performance and efficiency of LCD devices, making them more suitable for modern applications.
Latest Patents
One of Arakawa's latest patents is for a guest-host liquid crystal display device. This invention provides a liquid crystal composition that is suitable for low-voltage driving, featuring a pair of substrates bonded with a predetermined gap. The device utilizes a guest-host liquid crystal containing a dichroic dye, which is held in the gap between the substrates. The design includes a counter electrode and a reflecting electrode to apply voltage to the liquid crystal, which mainly comprises a nematic liquid crystal composition with a dielectric anisotropy value ranging from -2 to -10. The molecules of the nematic liquid crystal are aligned vertically with respect to the upper and lower substrates.
Another notable patent is for a reflection-type liquid crystal display device. This device enables low power consumption and bright white color display, achieving high contrast along with a response speed and picture quality that are compatible with moving pictures. It features a transparent substrate with a transparent electrode and a polarizing plate, along with a facing side substrate that has multiple pixel electrodes made of a light-reflective material. The nematic liquid crystal used is preferably a negative type, and the surfaces of the pixel electrodes present surface irregularities to enhance performance.
Career Highlights
Seiichi Arakawa has had a distinguished career at Sony Corporation, where he has been instrumental in advancing LCD technology. His innovative approaches have led to significant improvements in display quality and energy efficiency, making him a key figure in the industry.
Collaborations
Throughout his career, Arakawa has collaborated with notable colleagues, including Masataka Matsute and Junetsu Seto. These partnerships have fostered a creative environment that has led to groundbreaking advancements in liquid crystal technology.
Conclusion
Seiichi Arakawa's contributions to liquid crystal display technology have made a lasting impact on the industry. His innovative patents and collaborative efforts continue to shape the future of display technology, ensuring that advancements in this field will persist.