Patent №
US 4,500,925
Granted
1985-02-19
Filed 1982
Owner
HITACHI, LTD.
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
06390643
An auto-focusing system for a video camera using the focus signal extracted by a focus signal extracting device from high-frequency components of the video signal. A gate circuit is provided in front of the focus signal extracting device and the gate circuit is made conductive or non-conductive depending on the magnitude of the focus signal thereby to control the quantity of the video signal received by the focus signal extracting device, whereby the dynamic range of the focus signal extracting device is virtually expanded.
AI classification
Ownership
HITACHI, LTD.
assignment · 40160787
Assignors
HANMA, KENTARO, MURAKAMI, TOSHIO, TODAKA, YOSHIHIRO
On an employer assignment, the assignors are typically the inventors.