Company Filing History:
Years Active: 1984-1988
Title: Tohru Shikano: Innovator in Automatic Diaphragm Control Devices
Introduction
Tohru Shikano is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of automatic diaphragm control devices, holding a total of six patents. His work has advanced the technology used in television and CCTV cameras, enhancing their functionality and performance.
Latest Patents
Shikano's latest patents include an automatic diaphragm control device of variable photometry type used in television cameras. This invention utilizes a video signal from the camera to effect diaphragm control. The device features a fixed photometric circuit with a drastic peak characteristic, allowing for both drastic peak photometric adjustments and ordinary variable photometric adjustments. Additionally, it enables switching between variable peak mode and variable average mode, optimizing photometric characteristics for various requirements.
Another notable patent is the automatic diaphragm control device for use with CCTV cameras. This invention employs a video signal from the CCTV camera for diaphragm control. It includes first means for continuous control of the video signal concerning the absolute brightness of an object, second means for controlling the proportion of the video signal corresponding to bright portions, and third means for stabilizing the control signal with respect to a source voltage.
Career Highlights
Tohru Shikano is associated with Asahi Seimitsu Kabushiki Kaisha, where he has been instrumental in developing innovative technologies. His expertise in automatic diaphragm control devices has positioned him as a key figure in the industry.
Collaborations
Shikano has collaborated with notable coworkers, including Terumi Ogasawara and Masayuki Arai. Their combined efforts have contributed to the advancement of technology in their field.
Conclusion
Tohru Shikano's contributions to automatic diaphragm control devices have significantly impacted the technology used in television and CCTV cameras. His innovative patents reflect his dedication to enhancing photographic technology, making him a noteworthy inventor in the industry.