Company Filing History:
3 out of 1,268 
1 out of 3,089 
1 out of 113 Years Active: 2012-2025
Title: Inventor Spotlight: Yoshiko Ishimaru
Introduction
Yoshiko Ishimaru, a distinguished inventor based in Tokyo, Japan, has made significant contributions to the field of display technology. With a total of three patents to her name, she excels in innovation regarding wavelength selection filters and liquid crystal displays. Her inventive spirit and technical expertise have positioned her as a notable figure in the industry.
Latest Patents
Yoshiko's innovative work is exemplified through her latest patents. One of her key inventions is a wavelength selection filter, which is characterized by a complex structure comprising a first high refractive index section, a second high refractive index section, and a projection-depression structure layer. This filter is designed to achieve specific refractive index conditions that optimize performance in various applications.
Additionally, she holds a patent for a method of manufacturing a wavelength selection filter, which is intrinsically linked to her advancements in display technology. Furthermore, her patent concerning a liquid crystal display device reveals her adeptness in utilizing a color filter integrated with a backlight device featuring LED technology. Notably, her green pigment incorporates brominated zinc phthalocyanine, ensuring the device operates with optimal performance parameters.
Career Highlights
Throughout her career, Yoshiko has collaborated with leading companies such as Toppan Printing Co., Ltd. and Nichia Corporation. Her experiences in these esteemed organizations have helped her refine her skills and broaden her understanding of innovative technologies in the display sector.
Collaborations
Yoshiko has also worked alongside prominent colleagues, including Hidesato Hagiwara and Satoshi Ohkuma. Their collaborative efforts have led to the development of cutting-edge technologies that push the boundaries of current display innovations.
Conclusion
With her impressive portfolio of patents and successful collaborations, Yoshiko Ishimaru has established herself as a formidable inventor in the technology arena. Her contributions continue to influence the evolution of display devices, paving the way for future advancements in the field.