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:
Aug. 31, 2010
Filed:
Mar. 30, 2007
Koshi Kuwakino, Saitama, JP;
Koshi Kuwakino, Saitama, JP;
Fujinon Corporation, Saitama, JP;
Abstract
A lens aperture-adjustment device of a closed circuit television camera for capable of switching between automatic and manual adjustments of lens aperture is provided. The device includes a geared motor for driving aperture blades of a lens aperture mechanism; a drive circuit for driving the geared motor in response to a first drive signal for automatic adjustment or a second drive signal for manual adjustment; a comparison circuit for making a comparison between a lightness information signal responsive to the imaging environment and a first reference signal and outputting the first drive signal; a differential amplifier to which a manual adjustment signal entered by an operator and a second reference signal for defining the limit value of the drive amount of the geared motor are input, the differential amplifier for outputting the second drive signal; and a selection circuit for connecting the first drive signal or the second drive.