Patent ID: 8773592
Filing Date: 2014-07-08
Classification: G09G,H04N

Abstract:
1. A display apparatus comprising: a clock generator configured to generate a clock; an A/D converter configured to convert an analog video signal into a digital video signal in accordance with the clock; an image display unit including a plurality of pixels configured to display the digital video signal; a detector configured to detect a position at which the digital video signal starts or ends in a horizontal direction; and a phase controller configured to control the clock generator so that a phase of the clock can maximize an integrated evaluation value that is an integrated value of a differential absolute value between adjacent pixels in the image display unit over one frame of a plurality of digital video signals corresponding to a plurality of clocks having different phases generated by the clock generator when a value made by dividing a maximum value of the integrated evaluation value by a minimum value of the integrated evaluation value is larger than a first threshold, and to control the clock generator so that the phase of the clock can correspond to an intermediate position in a phase range in which the position becomes constant relative to the phase of the clock when the value made by dividing the maximum value by the minimum value is equal to or smaller than the first threshold.