Location History:
- Hitachi, JP (1985 - 1989)
- Ibaraki, JP (1991)
Company Filing History:
Years Active: 1985-1991
Title: Innovations of Yoshio Kawamata
Introduction
Yoshio Kawamata is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of printing technology, holding a total of 3 patents. His work focuses on enhancing the functionality and efficiency of photo printers and raster operation devices.
Latest Patents
One of his latest patents is a photo printer that features a host computer assist function. This innovative photo printer system includes a magnetic storage for storing print data sent from a host computer, a bit map memory for storing print dot data, and a printer engine for executing the printing process. The system is designed to operate with a program that allows the magnetic storage to function as external storage for the host computer, while the bit map memory serves as a cache memory. This setup enables bidirectional data read/write operations between the host computer and the printer system. Additionally, the system can directly save image data from an image scanner into the bit map memory, allowing for efficient data transfer upon request.
Another significant patent by Kawamata is a raster operation device. This device includes a word boundary checking circuit that operates on a hardware basis to ensure that data writing does not cross the word boundary of the frame buffer. It also features an address generation circuit that provides the next address for writing data, and a sequence control circuit that manages the read-modify-write operations based on the CPU's instructions. This innovation enhances the efficiency of data handling in frame buffers.
Career Highlights
Yoshio Kawamata has had a distinguished career at Hitachi, Ltd., where he has been instrumental in developing advanced printing technologies. His expertise in the field has led to numerous innovations that have improved the performance and capabilities of printing devices.
Collaborations
Throughout his career, Kawamata has collaborated with talented individuals such as Syoichi Ito and Katsufumi Takagishi. These collaborations have contributed to the advancement of technology in their respective fields.
Conclusion
Yoshio Kawamata's contributions to the field of printing technology through his innovative patents have significantly impacted the industry. His work continues to inspire advancements in printing systems and raster operation devices.