This inventor holds 3 USPTO granted patents. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1988-2003.
Location History:
- Amagasaki, JP (1988 - 1992)
- Tokyo, JP (2003)
Company Filing History:
Years Active: 1988-2003
Title: Noritsuna Hashimoto: Innovator in Display Technology
Introduction
Noritsuna Hashimoto is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of display technology, holding a total of 3 patents. His work focuses on improving luminous efficiency and brightness in display devices.
Latest Patents
One of Hashimoto's latest patents is for a material designed for converting ultraviolet rays and a display device utilizing this innovation. The objective of this invention is to enhance the luminous efficiency of gas discharge display devices by effectively using ultraviolet rays. These rays are absorbed in partition walls or protective films without contributing to the excitation of fluorescent materials. By incorporating gadolinium into the materials surrounding the discharge cell, ultraviolet rays with a wavelength of 315 nm are generated, which can excite the fluorescent material, ultimately improving electric-light conversion efficiency.
Another notable patent is for a projection cathode-ray tube that includes a multilayered interference film positioned between the faceplate and the cathode-ray tube. This design aims to enhance brightness in the normal direction. The phosphor layer on the faceplate consists of a first layer made of large-sized phosphor particles and a second layer of small-sized phosphor particles. The phosphor density is set to be 20 to 50% larger than what is necessary to achieve maximum brightness without the multilayered interference film. The phosphor particles used are preferably materials with high reflectance.
Career Highlights
Noritsuna Hashimoto is associated with Mitsubishi Denki Kabushiki Kaisha, a leading company in the field of electrical and electronic equipment. His innovative work has positioned him as a key figure in advancing display technologies.
Collaborations
Hashimoto has collaborated with notable coworkers, including Ko Sano and Keiji Fukuyama. Their combined expertise has contributed to the development of cutting-edge technologies in the display sector.
Conclusion
Noritsuna Hashimoto's contributions to display technology through his patents reflect his commitment to innovation and improvement in the field. His work continues to influence advancements in luminous efficiency and brightness in display devices.