Location History:
- Kusatsu, JP (1985)
- Moriyama, JP (1994)
Company Filing History:
Years Active: 1985-1994
Title: Mizuho Okada: Innovator in Electrophotographic Technology
Introduction
Mizuho Okada is a notable inventor based in Moriyama, Japan. He has made significant contributions to the field of electrophotography, holding 2 patents that showcase his innovative approaches to image formation.
Latest Patents
Okada's latest patents include a method for electrophotographic image formation. This method allows for the reproduction of high-quality images with stable density. It involves forming a static latent image on a photoreceptor through charging and exposing, followed by development. The key feature of this method is maintaining a constant maximum image density by measuring the surface potential of the maximum image density portion just before development. The developing bias potential is then set based on this measurement, ensuring a consistent difference between the surface potential and the developing bias potential.
Another significant patent is a multicolor electrophotographic process using titanium dioxide (TiO₂). This process enables the multi-step reproduction of color images by utilizing an electrophotographic photosensitive material. The method includes exposure to an optical image, followed by positive corona charging to form a positive electrostatic latent image. Additionally, negative corona charging and/or AC corona charging are performed prior to exposure. This innovative process effectively utilizes the photomemory effect of titanium dioxide, allowing for the production of multi-color images with good contrast.
Career Highlights
Mizuho Okada is currently employed at Ishihara Sangyo Kaisha, Ltd., where he continues to develop and refine his inventions. His work has significantly impacted the field of electrophotography, enhancing the quality and stability of image reproduction.
Collaborations
Okada has collaborated with notable coworkers, including Kei Takahata and Sadao Murasawa. These partnerships have contributed to the advancement of his research and innovations in electrophotographic technology.
Conclusion
Mizuho Okada's contributions to electrophotography through his innovative patents demonstrate his expertise and commitment to advancing image formation technology. His work continues to influence the industry and inspire future innovations.