Kiyotsugu Ishikawa

Title: Kiyotsugu Ishikawa: Innovator in Color Filter Technology

Introduction

Kiyotsugu Ishikawa is a notable inventor based in Takatsuki, Japan. He has made significant contributions to the field of imaging technology, particularly in the development of color filters and solid-state image sensors. With a total of 6 patents to his name, Ishikawa's work has had a lasting impact on the industry.

Latest Patents

One of Ishikawa's latest patents is a color filter that incorporates cyan, yellow, green, and magenta filter elements. This innovative color filter is structured with unit arrays consisting of two columns and four rows of filter elements. The first column features cyan, magenta, cyan, and green (or green, yellow, green, and cyan) filter elements arranged sequentially. The second column contains yellow, green, yellow, and magenta (or magenta, cyan, magenta, and yellow) filter elements in a similar order. This design allows for a solid-state image apparatus with an expanded dynamic range, utilizing the dynamic range of the photoelectric elements corresponding to the green filter elements more efficiently.

Another significant patent by Ishikawa is a method for driving a solid-state image sensor. This method involves transferring bias charges in a horizontal readout CCD (charge-coupled device) shift register onto vertical signal lines along with the signal charges. Subsequently, both signal and bias charges are transferred back into the horizontal readout CCD shift register, from which the signal charges generated at the photosensor or photodiodes are read out.

Career Highlights

Throughout his career, Kiyotsugu Ishikawa has worked with prominent companies such as Matsushita Electronics Corporation and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in imaging technology and innovation.

Collaborations

Ishikawa has collaborated with notable coworkers, including Yoshiaki Sone and Susumu Hashimoto. Their combined efforts have further advanced the field of imaging technology.

Conclusion

Kiyotsugu Ishikawa's contributions to color filter technology and solid-state image sensors have established him as a key figure in the field. His innovative patents and collaborations reflect his dedication to advancing imaging technology.