The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1980
Filed:
Aug. 18, 1978
Asahi Broadcasting Corporation, Osaka, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A scanning area rotation device for an image pick-up tube is provided with a focusing coil enclosing the image pick-up tube and a rotation coil surrounding the vicinity of the target face of the image pick-up tube. A first integration value is calculated by integrating a magnetic flux density, which is developed by the focusing coil, distributing from the target face toward an electron gun of the image pick-up tube with respect to a distance along a tube axis of the image pick-up tube. A second integration value is calculated by integrating a magnetic flux density, which is developed by the rotation coil, distributing from the target face toward the electron gun with respect to a distance along the tube axis. In order to rotate the scanning-area on the target face without off-focusing of the electron beams scanned on the target face, current flowing through the rotation coil has a value allowing the ratio of the second to first integration value to be less than 1/100 in absolute value.