Patent ID: 7345690
Filing Date: 2008-03-18
Classification: G09G,H04N

Abstract:
1. A display system for adjusting video parameters of a user-selected area of a complete image being displayed, the display system comprising: a level detector receiving a video signal from an image source device and detecting a line pattern signal integrated in one of a plurality of image lines representative of said complete image, said line pattern signal including pattern data identifying the user-selected area, said line pattern signal including PCLOCK, PDATA and PWINDOW signals, wherein the PDATA signal represents the vertical extent of the user-selected area and the PWINDOW signal represents the horizontal extent of the user-selected area, and wherein the line pattern signal includes a control code configured to control brightness of the user-selected area, and at least one of contrast, sharpness, and emphasis; a pattern receiver coupled to said level detector for receiving said detected line pattern signal, said pattern receiver extracting said pattern data that includes a position indicator having ends that are vertically aligned with vertical edges of said user-selected area; a pixel counter coupled to said pattern receiver for measuring a first set of horizontal positions of said position indicator ends with respect to a first starting pixel of a topmost image line of said complete image as a reference point; a pattern analyzer calculating a second set of horizontal positions of vertical edges of a video control area with respect to said reference point on the basis of said first set of horizontal positions; and a video preamplifier adjusting at least one of video parameters of said video control area, wherein the display system further receives a V-sync and H-sync signal separate from the plurality of image lines.