Removal of line selection artifacts from trace portions of line transfer CCD imager video output signals
Patent 4607286 Issued on August 19, 1986. Estimated Expiration Date: 
January 4, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 4, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCharge transfer imaging device Charge coupled parallel-to-serial converter for scene scanning and display Device for the compensation of drop-outs in a angle-velocity modulated signal Video memory device Line addressed charge coupled imager Patent #: 4577232 InventorAssigneeApplicationNo. 06/688982 filed on 01/04/1985US Classes:348/250, In charge coupled type sensor257/231, 2-dimensional area architecture257/240, Changing width or direction of channel (e.g., meandering channel)257/E27.156Interline transfer (EPO)ExaminersPrimary: Rubinson, Gene Z.Assistant: Brinich, Stephen Attorney, Agent or FirmInternational ClassesH04N 3/15 (20060101)H01L 27/148 (20060101) AbstractThere is electrostatic coupling of the forward clocking signals used in a CCD imager of line transfer type to the underlying bulk semiconductor and then to the output charge sensing stage. Changes in forward clocking signal application during the line selection process in the image register tend to introduce transient disturbances leaving visible artifacts in television pictures reconstructed from the video signals generated from the CCD imager output signal samples. This tendency can be obviated in CCD imagers of line transfer type by introducing additional clocked delay to place the disturbances in the line retrace interval. The disturbances can then be removed from video signals by line retrace blanking. | |
