Apparatus and method for maintaining synchronism between a pictu

Television – Video display – Vacuum panel

Patent

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Details

348540, 348531, 345205, 345 74, H04N 566, H04N 510

Patent

active

056106670

ABSTRACT:
A display apparatus for receiving a picture signal having video and synchronizing components includes a matrix of display cells arranged in an array of M columns by N rows. Display cells in the matrix are individually addressable by row and column signals so as to receive the video component of the picture signal in response thereto. A first shift circuit coupled to the matrix provides the column signals in response to a first clocking signal. A second shift circuit coupled to the matrix provides the row signals in response to a second clocking signal. A synchronizing detector or gate circuit coupled to the first and second shift circuits receives the synchronizing component of the picture signal and produces the second clocking signal in response to a preselected pointer signal from the first shift circuit. A phase locked loop circuit coupled to the first shift circuit receives the second clocking signal and produces the first clocking signal in response thereto.

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