Keisho Yamashita

Title: Keisho Yamashita: Innovator in Wavelength Conversion Technology

Introduction

Keisho Yamashita is a prominent inventor based in Anan, Japan. He is known for his significant contributions to the field of light-emitting devices and image display technology. His innovative work has led to the development of a unique wavelength conversion member that enhances the performance of various optical devices.

Latest Patents

Yamashita holds a patent for a wavelength conversion member, light-emitting device, and image display device. This invention includes a wavelength conversion layer that contains a fluoride phosphor, quantum dots, a surfactant, and a resin. The fluoride phosphor is composed of fluoride particles with specific compositions and particle size values. The quantum dots in his invention consist of at least one crystalline nanoparticle that emits light when irradiated with a wavelength of 450 nm. The first crystalline nanoparticle emits light with an emission peak in the range of 510 nm to 535 nm, while the second crystalline nanoparticle features a chalcopyrite-type crystalline structure.

Career Highlights

Yamashita is associated with Nichia Corporation, a leading company in the field of optoelectronics. His work at Nichia has been instrumental in advancing technologies related to light-emitting devices. His innovative approach and technical expertise have positioned him as a key figure in the development of new optical materials.

Collaborations

Yamashita has collaborated with notable coworkers, including Yuki Shiota and Shoji Hosokawa. Their combined efforts have contributed to the success of various projects within Nichia Corporation.

Conclusion

Keisho Yamashita's contributions to wavelength conversion technology exemplify the innovative spirit of modern inventors. His work continues to influence advancements in light-emitting devices and image display technologies.