Location History:
- Tokyo, JP (2014)
- Yokohama, JP (2015 - 2016)
- Kawasaki, JP (2020)
Company Filing History:
5 out of 52,766 
5 out of 266 
Years Active: 2014-2020
Title: Daichi Usui: A Pioneer in Phosphor Technology
Introduction
Daichi Usui, an innovative inventor based in Yokohama, Japan, has made significant contributions to the field of phosphor technology. With a total of five patents to his name, Usui's work primarily focuses on creating advanced phosphors that are essential for various light-emitting devices.
Latest Patents
Among his latest inventions, Usui has developed a phosphor and a method for producing the same. This phosphor features a unique composition represented by the formula NaRMSO, where R includes elements such as Yttrium, Lanthanum, Gadolinium, and Lutetium, while M consists of elements like Bismuth, Cerium, Europium, and Praseodymium. These specific atomic ratios are carefully balanced to achieve optimal performance.
Another notable patent is for a phosphor comprising a europium-activated sialon crystal, expressed by the basic composition formula (Sr, Eu)SiAlON(1). This phosphor emits green light when it is stimulated by ultraviolet, violet, or blue light, showcasing Usui's ability to innovate in creating efficient and effective phosphors for modern applications.
Career Highlights
Daichi Usui's career highlights include significant roles at Kabushiki Kaisha Toshiba and Toshiba Materials Co., Ltd., where he applied his expertise in material science and innovation. His background at these leading companies has been instrumental in advancing his research and development in phosphors and related technologies.
Collaborations
Throughout his career, Usui has collaborated with notable colleagues, including Yasuhiro Shirakawa and Hirofumi Takemura. These partnerships have fostered a creative environment for research and development, leading to groundbreaking discoveries in phosphor technology.
Conclusion
Daichi Usui stands out as a leading inventor in the domain of phosphor technology. His patented inventions not only enhance the effectiveness of light-emitting devices but also pave the way for future innovations in the field. As technology continues to evolve, Usui's contributions will undoubtedly remain significant in shaping the future of lighting solutions.