Location History:
- Osaka, JP (1979)
- Kashihara, JP (1979 - 1992)
Company Filing History:
Years Active: 1979-1992
Title: Hirotoshi Niguchi: Innovator in Optical Disk Media and Speaker Diaphragms
Introduction
Hirotoshi Niguchi is a notable inventor based in Kashihara, Japan. He has made significant contributions to the fields of optical disk media and speaker technology. With a total of 4 patents to his name, Niguchi's work showcases his innovative spirit and technical expertise.
Latest Patents
One of Niguchi's latest patents is for erasable optical disk media and the method of recording and erasing the same. This technology features a double-layer structure that includes a thermal expansion layer made of organic dye and a binder, along with a retention layer of metal. During the recording process, the thermal expansion layer is heated to create a dome-like pit in the retention layer. The reproduction process involves reading differences in reflectivity from the pit and its surrounding area. Notably, the erasing process allows for complete removal of the pit without leaving any partially erased traces, ensuring high durability and heat resistance.
Another significant patent by Niguchi is for a speaker diaphragm and the method of its preparation. This diaphragm is created by heating a conjugated sheet made from polyethylene short fibers and other high-modulus fibers, such as carbon fiber. The resulting diaphragm boasts a high modulus of elasticity and internal loss, leading to a speaker that offers a wider frequency response and lower distortion. The production process is efficient, allowing for continuous pressing of the speaker diaphragm using a cold mold press.
Career Highlights
Hirotoshi Niguchi is currently associated with Matsushita Electric Industrial Co., Ltd., where he continues to innovate and develop new technologies. His work has had a lasting impact on the industry, particularly in enhancing the performance of optical media and audio equipment.
Collaborations
Niguchi has collaborated with several talented individuals in his field, including Mitsuru Ieki and Osamu Yamamoto. These partnerships have contributed to the advancement of his projects and the successful development of his inventions.
Conclusion
Hirotoshi Niguchi's contributions to technology, particularly in erasable optical disk media and speaker diaphragms, highlight his role as a leading inventor. His innovative patents reflect a commitment to enhancing the functionality and durability of electronic devices.