This inventor holds 5 USPTO granted patents. Top assignees: Sharp Kabushiki Kaisha Corporation, Fuji Electric Holdings Co., Ltd.. Active years: 2007-2014.
Location History:
- Nagano, JP (2007 - 2009)
- Yokosuka, JP (2013)
- Matsumoto, JP (2013 - 2014)
Company Filing History:
3 out of 25,939 
2 out of 85 
Years Active: 2007-2014
Title: Innovations of Toshio Hama in Organic Electroluminescent Devices
Introduction
Toshio Hama is a notable inventor based in Matsumoto, Japan. He has made significant contributions to the field of organic electroluminescent devices, holding a total of 5 patents. His work focuses on enhancing the efficiency and functionality of these devices through innovative materials and designs.
Latest Patents
One of Hama's latest patents is a color conversion film designed for use in multicolor-emitting organic electroluminescent devices. This film absorbs light emitted from an organic electroluminescent part that produces blue-green light and converts it to visible light at a longer wavelength. The color conversion film incorporates two different dyes. The first dye is a polymer dye with an average molecular weight ranging from 1,000 to 1,000,000. This dye absorbs incoming light and transfers its energy to a second dye, which then emits light. This innovative approach allows for excellent conversion efficiency without increasing the thickness of the color conversion film, a common limitation in conventional devices that utilize binder resins.
Career Highlights
Throughout his career, Toshio Hama has worked with prominent companies such as Sharp Corporation and Fuji Electric Holdings Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced technologies in the field of organic electronics.
Collaborations
Hama has collaborated with notable colleagues, including Koji Kawaguchi and Makoto Kobayashi. These partnerships have likely fostered a creative environment that encourages innovation and the development of cutting-edge technologies.
Conclusion
Toshio Hama's contributions to the field of organic electroluminescent devices highlight his innovative spirit and dedication to advancing technology. His patents reflect a commitment to improving efficiency and functionality in electronic devices, making him a significant figure in the realm of inventions.