Location History:
- Chiyoda-ku, JP (2012)
- Tokyo, JP (2001 - 2014)
- Yokkaichi, JP (2011 - 2014)
- Mie, JP (2013 - 2014)
Company Filing History:
6 out of 2,351 
4 out of 21,351 
2 out of 15,928 
Years Active: 2001-2014
Title: Kazuhiko Kagawa: Innovator in Semiconductor Technology
Introduction
Kazuhiko Kagawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of white light-emitting devices. With a total of 12 patents to his name, Kagawa's work has had a substantial impact on the industry.
Latest Patents
Kagawa's latest patents include innovative designs for white light-emitting semiconductor devices. One of his notable inventions focuses on improving the reproducibility of bright red light. This device outputs light that includes blue, green, and red components, utilizing light-emitting semiconductor elements and phosphors for wavelength conversion. The emitted light spectrum has a maximum wavelength ranging from 615-645 nm, with a normalized intensity at 580 nm that is 80-100% of the standard light for color rendering evaluation.
Another significant patent aims to provide controllable parameters correlated with the special color rendering index R9. This invention optimizes parameters to achieve a high R9 value in white-light emitting semiconductor devices. The device incorporates a phosphor as a light-emitting material and a light-emitting semiconductor element as an excitation source. The phosphor includes at least a green phosphor and a wide-band red phosphor, ensuring that the intensity at 640 nm is 100-110% of the standard light for color rendering evaluation.
Career Highlights
Throughout his career, Kazuhiko Kagawa has worked with notable companies such as Mitsubishi Chemical Corporation and Mitsubishi Electric Corporation. His experience in these organizations has allowed him to refine his expertise in semiconductor technology and contribute to groundbreaking innovations.
Collaborations
Kagawa has collaborated with esteemed colleagues, including Hiroaki Sakuta and Yoshihito Satou. These partnerships have fostered a creative environment that has led to the development of advanced technologies in the field.
Conclusion
Kazuhiko Kagawa's contributions to semiconductor technology, particularly in white light-emitting devices, showcase his innovative spirit and dedication to advancing the field. His patents reflect a commitment to improving color rendering and light quality, making him a significant figure in the industry.