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:
Oct. 17, 1995
Filed:
Jul. 08, 1994
Kaarlo J Hamalainen, Medford, NJ (US);
Panasonic Technologies, Inc., Secaucus, NJ (US);
Abstract
A CCD imager is used in a television camera which generates signals for use with a particular television standard, such as the proposed U.S. HDTV production standard. The imager includes a light-sensitive A register which generates signal in the form of charge during an integrating interval, a B charge storage register into which the charge is transferred during a pull-down interval, and a horizontal shift register coupled to the last row of the B register, into which the charges are simultaneously coupled, and serially read. The video signals produced by the imager are subject to distortion caused by incomplete charge transfer in the pull-down interval and crosstalk noise resulting from gating the clock signals to the horizontal shift register on and off. Vertical transfer distortion is reduced by reading the horizontal lines from the horizontal shift register with reduced intervals between the active portions, which allows the pull-down interval to be increased. The increased pull-down interval allows use of a lower frequency signal for the vertical transfer clock signal. Crosstalk noise is reduced by applying the horizontal shift register clock to the horizontal shift register continuously.